cve-2024-42103
Vulnerability from cvelistv5
Published
2024-07-30 07:45
Modified
2024-12-19 09:12
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix adding block group to a reclaim list and the unused list during reclaim There is a potential parallel list adding for retrying in btrfs_reclaim_bgs_work and adding to the unused list. Since the block group is removed from the reclaim list and it is on a relocation work, it can be added into the unused list in parallel. When that happens, adding it to the reclaim list will corrupt the list head and trigger list corruption like below. Fix it by taking fs_info->unused_bgs_lock. [177.504][T2585409] BTRFS error (device nullb1): error relocating ch= unk 2415919104 [177.514][T2585409] list_del corruption. next->prev should be ff1100= 0344b119c0, but was ff11000377e87c70. (next=3Dff110002390cd9c0) [177.529][T2585409] ------------[ cut here ]------------ [177.537][T2585409] kernel BUG at lib/list_debug.c:65! [177.545][T2585409] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [177.555][T2585409] CPU: 9 PID: 2585409 Comm: kworker/u128:2 Tainted: G W 6.10.0-rc5-kts #1 [177.568][T2585409] Hardware name: Supermicro SYS-520P-WTR/X12SPW-TF, BIOS 1.2 02/14/2022 [177.579][T2585409] Workqueue: events_unbound btrfs_reclaim_bgs_work[btrfs] [177.589][T2585409] RIP: 0010:__list_del_entry_valid_or_report.cold+0x70/0x72 [177.624][T2585409] RSP: 0018:ff11000377e87a70 EFLAGS: 00010286 [177.633][T2585409] RAX: 000000000000006d RBX: ff11000344b119c0 RCX:0000000000000000 [177.644][T2585409] RDX: 000000000000006d RSI: 0000000000000008 RDI:ffe21c006efd0f40 [177.655][T2585409] RBP: ff110002e0509f78 R08: 0000000000000001 R09:ffe21c006efd0f08 [177.665][T2585409] R10: ff11000377e87847 R11: 0000000000000000 R12:ff110002390cd9c0 [177.676][T2585409] R13: ff11000344b119c0 R14: ff110002e0508000 R15:dffffc0000000000 [177.687][T2585409] FS: 0000000000000000(0000) GS:ff11000fec880000(0000) knlGS:0000000000000000 [177.700][T2585409] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [177.709][T2585409] CR2: 00007f06bc7b1978 CR3: 0000001021e86005 CR4:0000000000771ef0 [177.720][T2585409] DR0: 0000000000000000 DR1: 0000000000000000 DR2:0000000000000000 [177.731][T2585409] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:0000000000000400 [177.742][T2585409] PKRU: 55555554 [177.748][T2585409] Call Trace: [177.753][T2585409] <TASK> [177.759][T2585409] ? __die_body.cold+0x19/0x27 [177.766][T2585409] ? die+0x2e/0x50 [177.772][T2585409] ? do_trap+0x1ea/0x2d0 [177.779][T2585409] ? __list_del_entry_valid_or_report.cold+0x70/0x72 [177.788][T2585409] ? do_error_trap+0xa3/0x160 [177.795][T2585409] ? __list_del_entry_valid_or_report.cold+0x70/0x72 [177.805][T2585409] ? handle_invalid_op+0x2c/0x40 [177.812][T2585409] ? __list_del_entry_valid_or_report.cold+0x70/0x72 [177.820][T2585409] ? exc_invalid_op+0x2d/0x40 [177.827][T2585409] ? asm_exc_invalid_op+0x1a/0x20 [177.834][T2585409] ? __list_del_entry_valid_or_report.cold+0x70/0x72 [177.843][T2585409] btrfs_delete_unused_bgs+0x3d9/0x14c0 [btrfs] There is a similar retry_list code in btrfs_delete_unused_bgs(), but it is safe, AFAICS. Since the block group was in the unused list, the used bytes should be 0 when it was added to the unused list. Then, it checks block_group->{used,reserved,pinned} are still 0 under the block_group->lock. So, they should be still eligible for the unused list, not the reclaim list. The reason it is safe there it's because because we're holding space_info->groups_sem in write mode. That means no other task can allocate from the block group, so while we are at deleted_unused_bgs() it's not possible for other tasks to allocate and deallocate extents from the block group, so it can't be added to the unused list or the reclaim list by anyone else. The bug can be reproduced by btrfs/166 after a few rounds. In practice this can be hit when relocation cannot find more chunk space and ends with ENOSPC.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/326fa14549d7969ef80d3f5beea5470cd1c8e67f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/48f091fd50b2eb33ae5eaea9ed3c4f81603acf38
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/522b39bd7163e8dc49f8cf10b9b782218ac48746
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aa1d8cc0cc500e06b316cd6732d4e6c1388fe33c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f8e960be923f74a273c62478c9cab9523936752b
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/326fa14549d7969ef80d3f5beea5470cd1c8e67f
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/48f091fd50b2eb33ae5eaea9ed3c4f81603acf38
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/522b39bd7163e8dc49f8cf10b9b782218ac48746
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/aa1d8cc0cc500e06b316cd6732d4e6c1388fe33c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f8e960be923f74a273c62478c9cab9523936752b
Impacted products
Vendor Product Version
Linux Linux Version: 2311fd03027d2c1b2ac4a3a41153a16352659b65
Version: 15cb476ceb7da730857b8e94f06161273adb7a3a
Version: bf1e8c21f2bef7dfcdadc93b0bb2e8723639d5f7
Version: ab58fe210c40e582a9fd3d122ae21071adb5470a
Version: 4eb4e85c4f818491efc67e9373aa16b123c3f522
 Create a notification for this product.
   Linux Linux Version: 5.15.162   ≤
Version: 6.1.96   ≤
Version: 6.6.36   ≤
Version: 6.9.7   ≤
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix adding block group to a reclaim list and the unused list during reclaim\n\nThere is a potential parallel list adding for retrying in\nbtrfs_reclaim_bgs_work and adding to the unused list. Since the block\ngroup is removed from the reclaim list and it is on a relocation work,\nit can be added into the unused list in parallel. When that happens,\nadding it to the reclaim list will corrupt the list head and trigger\nlist corruption like below.\n\nFix it by taking fs_info-\u003eunused_bgs_lock.\n\n  [177.504][T2585409] BTRFS error (device nullb1): error relocating ch= unk 2415919104\n  [177.514][T2585409] list_del corruption. next-\u003eprev should be ff1100= 0344b119c0, but was ff11000377e87c70. (next=3Dff110002390cd9c0)\n  [177.529][T2585409] ------------[ cut here ]------------\n  [177.537][T2585409] kernel BUG at lib/list_debug.c:65!\n  [177.545][T2585409] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\n  [177.555][T2585409] CPU: 9 PID: 2585409 Comm: kworker/u128:2 Tainted: G        W          6.10.0-rc5-kts #1\n  [177.568][T2585409] Hardware name: Supermicro SYS-520P-WTR/X12SPW-TF, BIOS 1.2 02/14/2022\n  [177.579][T2585409] Workqueue: events_unbound btrfs_reclaim_bgs_work[btrfs]\n  [177.589][T2585409] RIP: 0010:__list_del_entry_valid_or_report.cold+0x70/0x72\n  [177.624][T2585409] RSP: 0018:ff11000377e87a70 EFLAGS: 00010286\n  [177.633][T2585409] RAX: 000000000000006d RBX: ff11000344b119c0 RCX:0000000000000000\n  [177.644][T2585409] RDX: 000000000000006d RSI: 0000000000000008 RDI:ffe21c006efd0f40\n  [177.655][T2585409] RBP: ff110002e0509f78 R08: 0000000000000001 R09:ffe21c006efd0f08\n  [177.665][T2585409] R10: ff11000377e87847 R11: 0000000000000000 R12:ff110002390cd9c0\n  [177.676][T2585409] R13: ff11000344b119c0 R14: ff110002e0508000 R15:dffffc0000000000\n  [177.687][T2585409] FS:  0000000000000000(0000) GS:ff11000fec880000(0000) knlGS:0000000000000000\n  [177.700][T2585409] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  [177.709][T2585409] CR2: 00007f06bc7b1978 CR3: 0000001021e86005 CR4:0000000000771ef0\n  [177.720][T2585409] DR0: 0000000000000000 DR1: 0000000000000000 DR2:0000000000000000\n  [177.731][T2585409] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:0000000000000400\n  [177.742][T2585409] PKRU: 55555554\n  [177.748][T2585409] Call Trace:\n  [177.753][T2585409]  \u003cTASK\u003e\n  [177.759][T2585409]  ? __die_body.cold+0x19/0x27\n  [177.766][T2585409]  ? die+0x2e/0x50\n  [177.772][T2585409]  ? do_trap+0x1ea/0x2d0\n  [177.779][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\n  [177.788][T2585409]  ? do_error_trap+0xa3/0x160\n  [177.795][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\n  [177.805][T2585409]  ? handle_invalid_op+0x2c/0x40\n  [177.812][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\n  [177.820][T2585409]  ? exc_invalid_op+0x2d/0x40\n  [177.827][T2585409]  ? asm_exc_invalid_op+0x1a/0x20\n  [177.834][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\n  [177.843][T2585409]  btrfs_delete_unused_bgs+0x3d9/0x14c0 [btrfs]\n\nThere is a similar retry_list code in btrfs_delete_unused_bgs(), but it is\nsafe, AFAICS. Since the block group was in the unused list, the used bytes\nshould be 0 when it was added to the unused list. Then, it checks\nblock_group-\u003e{used,reserved,pinned} are still 0 under the\nblock_group-\u003elock. So, they should be still eligible for the unused list,\nnot the reclaim list.\n\nThe reason it is safe there it\u0027s because because we\u0027re holding\nspace_info-\u003egroups_sem in write mode.\n\nThat means no other task can allocate from the block group, so while we\nare at deleted_unused_bgs() it\u0027s not possible for other tasks to\nallocate and deallocate extents from the block group, so it can\u0027t be\nadded to the unused list or the reclaim list by anyone else.\n\nThe bug can be reproduced by btrfs/166 after a few rounds. In practice\nthis can be hit when relocation cannot find more chunk space and ends\nwith ENOSPC."
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      "title": "btrfs: fix adding block group to a reclaim list and the unused list during reclaim",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-42103",
    "datePublished": "2024-07-30T07:45:59.220Z",
    "dateReserved": "2024-07-29T15:50:41.175Z",
    "dateUpdated": "2024-12-19T09:12:48.384Z",
    "state": "PUBLISHED"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-42103\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-30T08:15:02.817\",\"lastModified\":\"2024-11-21T09:33:36.413\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: fix adding block group to a reclaim list and the unused list during reclaim\\n\\nThere is a potential parallel list adding for retrying in\\nbtrfs_reclaim_bgs_work and adding to the unused list. Since the block\\ngroup is removed from the reclaim list and it is on a relocation work,\\nit can be added into the unused list in parallel. When that happens,\\nadding it to the reclaim list will corrupt the list head and trigger\\nlist corruption like below.\\n\\nFix it by taking fs_info-\u003eunused_bgs_lock.\\n\\n  [177.504][T2585409] BTRFS error (device nullb1): error relocating ch= unk 2415919104\\n  [177.514][T2585409] list_del corruption. next-\u003eprev should be ff1100= 0344b119c0, but was ff11000377e87c70. (next=3Dff110002390cd9c0)\\n  [177.529][T2585409] ------------[ cut here ]------------\\n  [177.537][T2585409] kernel BUG at lib/list_debug.c:65!\\n  [177.545][T2585409] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\\n  [177.555][T2585409] CPU: 9 PID: 2585409 Comm: kworker/u128:2 Tainted: G        W          6.10.0-rc5-kts #1\\n  [177.568][T2585409] Hardware name: Supermicro SYS-520P-WTR/X12SPW-TF, BIOS 1.2 02/14/2022\\n  [177.579][T2585409] Workqueue: events_unbound btrfs_reclaim_bgs_work[btrfs]\\n  [177.589][T2585409] RIP: 0010:__list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.624][T2585409] RSP: 0018:ff11000377e87a70 EFLAGS: 00010286\\n  [177.633][T2585409] RAX: 000000000000006d RBX: ff11000344b119c0 RCX:0000000000000000\\n  [177.644][T2585409] RDX: 000000000000006d RSI: 0000000000000008 RDI:ffe21c006efd0f40\\n  [177.655][T2585409] RBP: ff110002e0509f78 R08: 0000000000000001 R09:ffe21c006efd0f08\\n  [177.665][T2585409] R10: ff11000377e87847 R11: 0000000000000000 R12:ff110002390cd9c0\\n  [177.676][T2585409] R13: ff11000344b119c0 R14: ff110002e0508000 R15:dffffc0000000000\\n  [177.687][T2585409] FS:  0000000000000000(0000) GS:ff11000fec880000(0000) knlGS:0000000000000000\\n  [177.700][T2585409] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n  [177.709][T2585409] CR2: 00007f06bc7b1978 CR3: 0000001021e86005 CR4:0000000000771ef0\\n  [177.720][T2585409] DR0: 0000000000000000 DR1: 0000000000000000 DR2:0000000000000000\\n  [177.731][T2585409] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:0000000000000400\\n  [177.742][T2585409] PKRU: 55555554\\n  [177.748][T2585409] Call Trace:\\n  [177.753][T2585409]  \u003cTASK\u003e\\n  [177.759][T2585409]  ? __die_body.cold+0x19/0x27\\n  [177.766][T2585409]  ? die+0x2e/0x50\\n  [177.772][T2585409]  ? do_trap+0x1ea/0x2d0\\n  [177.779][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.788][T2585409]  ? do_error_trap+0xa3/0x160\\n  [177.795][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.805][T2585409]  ? handle_invalid_op+0x2c/0x40\\n  [177.812][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.820][T2585409]  ? exc_invalid_op+0x2d/0x40\\n  [177.827][T2585409]  ? asm_exc_invalid_op+0x1a/0x20\\n  [177.834][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.843][T2585409]  btrfs_delete_unused_bgs+0x3d9/0x14c0 [btrfs]\\n\\nThere is a similar retry_list code in btrfs_delete_unused_bgs(), but it is\\nsafe, AFAICS. Since the block group was in the unused list, the used bytes\\nshould be 0 when it was added to the unused list. Then, it checks\\nblock_group-\u003e{used,reserved,pinned} are still 0 under the\\nblock_group-\u003elock. So, they should be still eligible for the unused list,\\nnot the reclaim list.\\n\\nThe reason it is safe there it\u0027s because because we\u0027re holding\\nspace_info-\u003egroups_sem in write mode.\\n\\nThat means no other task can allocate from the block group, so while we\\nare at deleted_unused_bgs() it\u0027s not possible for other tasks to\\nallocate and deallocate extents from the block group, so it can\u0027t be\\nadded to the unused list or the reclaim list by anyone else.\\n\\nThe bug can be reproduced by btrfs/166 after a few rounds. In practice\\nthis can be hit when relocation cannot find more chunk space and ends\\nwith ENOSPC.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: corrige la adici\u00f3n de un grupo de bloques a una lista de recuperaci\u00f3n y la lista no utilizada durante la recuperaci\u00f3n. Existe una posible adici\u00f3n de lista paralela para volver a intentarlo en btrfs_reclaim_bgs_work y agregarla a la lista no utilizada. Dado que el grupo de bloques se elimina de la lista de recuperaci\u00f3n y se encuentra en un trabajo de reubicaci\u00f3n, se puede agregar a la lista no utilizada en paralelo. Cuando eso sucede, agregarlo a la lista de recuperaci\u00f3n da\u00f1ar\u00e1 el encabezado de la lista y provocar\u00e1 una corrupci\u00f3n en la lista como se muestra a continuaci\u00f3n. Solucionarlo tomando fs_info-\u0026gt;unused_bgs_lock. [177.504][T2585409] Error BTRFS (dispositivo nullb1): error al reubicar ch= unk 2415919104 [177.514][T2585409] corrupci\u00f3n list_del. siguiente-\u0026gt;anterior deber\u00eda ser ff1100= 0344b119c0, pero era ff11000377e87c70. (next=3Dff110002390cd9c0) [177.529][T2585409] ------------[ cortar aqu\u00ed ]------------ [177.537][T2585409] ERROR del kernel en lib/ list_debug.c:65! [177.545][T2585409] Ups: c\u00f3digo de operaci\u00f3n no v\u00e1lido: 0000 [#1] PREEMPT SMP KASAN NOPTI [177.555][T2585409] CPU: 9 PID: 2585409 Comm: kworker/u128:2 Contaminado: GW 6.10.0-rc5-kts # 1 [177.568][T2585409] Nombre de hardware: Supermicro SYS-520P-WTR/X12SPW-TF, BIOS 1.2 14/02/2022 [177.579][T2585409] Cola de trabajo: events_unbound btrfs_reclaim_bgs_work[btrfs] [177.589][T2585409] QEPD: 0010 :__list_del_entry_valid_or_report.cold+0x70/0x72 [177.624][T2585409] RSP: 0018:ff11000377e87a70 EFLAGS: 00010286 [177.633][T2585409] RAX: 000000000000006d RBX: ff11000344b119c0 RCX:0000000000000000 [177.644][T2585409] RDX: 000000000000006d RSI: 0000000000000008 RDI :ffe21c006efd0f40 [177.655][T2585409] RBP: ff110002e0509f78 R08: 0000000000000001 R09:ffe21c006efd0f08 [177.665][T2585409] R10: 7847 R11: 0000000000000000 R12:ff110002390cd9c0 [177.676][T2585409] R13: ff11000344b119c0 R14: ff110002e0508000 R15:dffffc0000000000 [177. 687] [T2585409] FS: 0000000000000000(0000) GS:ff11000fec880000(0000) knlGS:0000000000000000 [177.700][T2585409] CS: 0010 DS: 0000 ES: 0000 CR0: 00000080050033 [177.709][T2585409] CR2: 00007f06bc7b1978 CR3: 0000001021e86005 CR4: 0000000000771ef0 [177.720][T2585409] DR0: 0000000000000000 DR1: 0000000000000000 DR2:0000000000000000 [177.731][T2585409] DR3: 00000000 DR6: 00000000fffe0ff0 DR7:0000000000000400 [177.742][T2585409] PKRU: 55555554 [177.748][T2585409] Seguimiento de llamadas: [ 177.753][T2585409]  [177.759][T2585409] ? __die_body.cold+0x19/0x27 [177.766][T2585409] ? morir+0x2e/0x50 [177.772][T2585409] ? do_trap+0x1ea/0x2d0 [177.779][T2585409] ? __list_del_entry_valid_or_report.cold+0x70/0x72 [177.788][T2585409] ? do_error_trap+0xa3/0x160 [177.795][T2585409] ? __list_del_entry_valid_or_report.cold+0x70/0x72 [177.805][T2585409] ? handle_invalid_op+0x2c/0x40 [177.812][T2585409] ? __list_del_entry_valid_or_report.cold+0x70/0x72 [177.820][T2585409] ? exc_invalid_op+0x2d/0x40 [177.827][T2585409] ? asm_exc_invalid_op+0x1a/0x20 [177.834][T2585409] ? __list_del_entry_valid_or_report.cold+0x70/0x72 [177.843][T2585409] btrfs_delete_unused_bgs+0x3d9/0x14c0 [btrfs] Hay un c\u00f3digo retry_list similar en btrfs_delete_unused_bgs(), pero es seguro, AFAICS. Dado que el grupo de bloques estaba en la lista no utilizada, los bytes usados deber\u00edan ser 0 cuando se agreg\u00f3 a la lista no utilizada. Luego, verifica que block_group-\u0026gt;{used,reserved,pinned} todav\u00eda sean 0 bajo block_group-\u0026gt;lock. Por lo tanto, a\u00fan deber\u00edan ser elegibles para la lista no utilizada, no para la lista de recuperaci\u00f3n. La raz\u00f3n por la que es seguro all\u00ed es porque mantenemos space_info-\u0026gt;groups_sem en modo de escritura. Eso significa que ninguna otra tarea puede asignar desde el grupo de bloques, por lo que mientras estamos en deleted_unused_bgs() no es posible que otras tareas asignen y desasignen extensiones del grupo de bloques, por lo que no se pueden agregar a la lista no utilizada ni a la reclamaci\u00f3n. lista por cualquier otra persona. El error puede repro ---truncado---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/326fa14549d7969ef80d3f5beea5470cd1c8e67f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/48f091fd50b2eb33ae5eaea9ed3c4f81603acf38\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/522b39bd7163e8dc49f8cf10b9b782218ac48746\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa1d8cc0cc500e06b316cd6732d4e6c1388fe33c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f8e960be923f74a273c62478c9cab9523936752b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/326fa14549d7969ef80d3f5beea5470cd1c8e67f\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/48f091fd50b2eb33ae5eaea9ed3c4f81603acf38\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/522b39bd7163e8dc49f8cf10b9b782218ac48746\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/aa1d8cc0cc500e06b316cd6732d4e6c1388fe33c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/f8e960be923f74a273c62478c9cab9523936752b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/522b39bd7163e8dc49f8cf10b9b782218ac48746\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/aa1d8cc0cc500e06b316cd6732d4e6c1388fe33c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/f8e960be923f74a273c62478c9cab9523936752b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/326fa14549d7969ef80d3f5beea5470cd1c8e67f\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/48f091fd50b2eb33ae5eaea9ed3c4f81603acf38\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:54:32.196Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-42103\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:17:56.057327Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:12.815Z\"}}], \"cna\": {\"title\": \"btrfs: fix adding block group to a reclaim list and the unused list during reclaim\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2311fd03027d\", \"lessThan\": \"522b39bd7163\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"15cb476ceb7d\", \"lessThan\": \"aa1d8cc0cc50\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"bf1e8c21f2be\", \"lessThan\": \"f8e960be923f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ab58fe210c40\", \"lessThan\": \"326fa14549d7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4eb4e85c4f81\", \"lessThan\": \"48f091fd50b2\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/btrfs/block-group.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.15.162\", \"lessThan\": \"5.15.163\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.1.96\", \"lessThan\": \"6.1.98\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.6.36\", \"lessThan\": \"6.6.39\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"6.9.7\", \"lessThan\": \"6.9.9\", \"versionType\": \"semver\"}], \"programFiles\": [\"fs/btrfs/block-group.c\"], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/522b39bd7163e8dc49f8cf10b9b782218ac48746\"}, {\"url\": \"https://git.kernel.org/stable/c/aa1d8cc0cc500e06b316cd6732d4e6c1388fe33c\"}, {\"url\": \"https://git.kernel.org/stable/c/f8e960be923f74a273c62478c9cab9523936752b\"}, {\"url\": \"https://git.kernel.org/stable/c/326fa14549d7969ef80d3f5beea5470cd1c8e67f\"}, {\"url\": \"https://git.kernel.org/stable/c/48f091fd50b2eb33ae5eaea9ed3c4f81603acf38\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: fix adding block group to a reclaim list and the unused list during reclaim\\n\\nThere is a potential parallel list adding for retrying in\\nbtrfs_reclaim_bgs_work and adding to the unused list. Since the block\\ngroup is removed from the reclaim list and it is on a relocation work,\\nit can be added into the unused list in parallel. When that happens,\\nadding it to the reclaim list will corrupt the list head and trigger\\nlist corruption like below.\\n\\nFix it by taking fs_info-\u003eunused_bgs_lock.\\n\\n  [177.504][T2585409] BTRFS error (device nullb1): error relocating ch= unk 2415919104\\n  [177.514][T2585409] list_del corruption. next-\u003eprev should be ff1100= 0344b119c0, but was ff11000377e87c70. (next=3Dff110002390cd9c0)\\n  [177.529][T2585409] ------------[ cut here ]------------\\n  [177.537][T2585409] kernel BUG at lib/list_debug.c:65!\\n  [177.545][T2585409] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI\\n  [177.555][T2585409] CPU: 9 PID: 2585409 Comm: kworker/u128:2 Tainted: G        W          6.10.0-rc5-kts #1\\n  [177.568][T2585409] Hardware name: Supermicro SYS-520P-WTR/X12SPW-TF, BIOS 1.2 02/14/2022\\n  [177.579][T2585409] Workqueue: events_unbound btrfs_reclaim_bgs_work[btrfs]\\n  [177.589][T2585409] RIP: 0010:__list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.624][T2585409] RSP: 0018:ff11000377e87a70 EFLAGS: 00010286\\n  [177.633][T2585409] RAX: 000000000000006d RBX: ff11000344b119c0 RCX:0000000000000000\\n  [177.644][T2585409] RDX: 000000000000006d RSI: 0000000000000008 RDI:ffe21c006efd0f40\\n  [177.655][T2585409] RBP: ff110002e0509f78 R08: 0000000000000001 R09:ffe21c006efd0f08\\n  [177.665][T2585409] R10: ff11000377e87847 R11: 0000000000000000 R12:ff110002390cd9c0\\n  [177.676][T2585409] R13: ff11000344b119c0 R14: ff110002e0508000 R15:dffffc0000000000\\n  [177.687][T2585409] FS:  0000000000000000(0000) GS:ff11000fec880000(0000) knlGS:0000000000000000\\n  [177.700][T2585409] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n  [177.709][T2585409] CR2: 00007f06bc7b1978 CR3: 0000001021e86005 CR4:0000000000771ef0\\n  [177.720][T2585409] DR0: 0000000000000000 DR1: 0000000000000000 DR2:0000000000000000\\n  [177.731][T2585409] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:0000000000000400\\n  [177.742][T2585409] PKRU: 55555554\\n  [177.748][T2585409] Call Trace:\\n  [177.753][T2585409]  \u003cTASK\u003e\\n  [177.759][T2585409]  ? __die_body.cold+0x19/0x27\\n  [177.766][T2585409]  ? die+0x2e/0x50\\n  [177.772][T2585409]  ? do_trap+0x1ea/0x2d0\\n  [177.779][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.788][T2585409]  ? do_error_trap+0xa3/0x160\\n  [177.795][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.805][T2585409]  ? handle_invalid_op+0x2c/0x40\\n  [177.812][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.820][T2585409]  ? exc_invalid_op+0x2d/0x40\\n  [177.827][T2585409]  ? asm_exc_invalid_op+0x1a/0x20\\n  [177.834][T2585409]  ? __list_del_entry_valid_or_report.cold+0x70/0x72\\n  [177.843][T2585409]  btrfs_delete_unused_bgs+0x3d9/0x14c0 [btrfs]\\n\\nThere is a similar retry_list code in btrfs_delete_unused_bgs(), but it is\\nsafe, AFAICS. Since the block group was in the unused list, the used bytes\\nshould be 0 when it was added to the unused list. Then, it checks\\nblock_group-\u003e{used,reserved,pinned} are still 0 under the\\nblock_group-\u003elock. So, they should be still eligible for the unused list,\\nnot the reclaim list.\\n\\nThe reason it is safe there it\u0027s because because we\u0027re holding\\nspace_info-\u003egroups_sem in write mode.\\n\\nThat means no other task can allocate from the block group, so while we\\nare at deleted_unused_bgs() it\u0027s not possible for other tasks to\\nallocate and deallocate extents from the block group, so it can\u0027t be\\nadded to the unused list or the reclaim list by anyone else.\\n\\nThe bug can be reproduced by btrfs/166 after a few rounds. In practice\\nthis can be hit when relocation cannot find more chunk space and ends\\nwith ENOSPC.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:37:27.736Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-42103\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:37:27.736Z\", \"dateReserved\": \"2024-07-29T15:50:41.175Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-30T07:45:59.220Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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