CVE-2021-47124
Vulnerability from cvelistv5
Published
2024-03-15 20:14
Modified
2024-12-19 07:35
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix link timeout refs WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 RIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 Call Trace: __refcount_sub_and_test include/linux/refcount.h:283 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] io_put_req fs/io_uring.c:2140 [inline] io_queue_linked_timeout fs/io_uring.c:6300 [inline] __io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354 io_submit_sqe fs/io_uring.c:6534 [inline] io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660 __do_sys_io_uring_enter fs/io_uring.c:9240 [inline] __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182 io_link_timeout_fn() should put only one reference of the linked timeout request, however in case of racing with the master request's completion first io_req_complete() puts one and then io_put_req_deferred() is called.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86
Impacted products
Vendor Product Version
Linux Linux Version: 1c20e9040f49687ba2ccc2ffd4411351a6c2ebff
Version: 1c20e9040f49687ba2ccc2ffd4411351a6c2ebff
Version: 9ae1f8dd372e0e4c020b345cf9e09f519265e981
Version: 9ae1f8dd372e0e4c020b345cf9e09f519265e981
Version: 9ae1f8dd372e0e4c020b345cf9e09f519265e981
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   Linux Linux Version: 5.12
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  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.