cve-2021-4441
Vulnerability from cvelistv5
Published
2024-08-22 01:30
Modified
2024-12-19 07:31
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: spi: spi-zynq-qspi: Fix a NULL pointer dereference in zynq_qspi_exec_mem_op() In zynq_qspi_exec_mem_op(), kzalloc() is directly used in memset(), which could lead to a NULL pointer dereference on failure of kzalloc(). Fix this bug by adding a check of tmpbuf. This bug was found by a static analyzer. The analysis employs differential checking to identify inconsistent security operations (e.g., checks or kfrees) between two code paths and confirms that the inconsistent operations are not recovered in the current function or the callers, so they constitute bugs. Note that, as a bug found by static analysis, it can be a false positive or hard to trigger. Multiple researchers have cross-reviewed the bug. Builds with CONFIG_SPI_ZYNQ_QSPI=m show no new warnings, and our static analyzer no longer warns about this code.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2efece1368aeee2d2552c7ec36aeb676c4d4c95fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3c32405d6474a21f7d742828e73c13e326dcae82Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ab3824427b848da10e9fe2727f035bbeecae6ff4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b9dd08cbebe0c593c49bf86d2012a431494e54cbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df14d2bed8e2455878e046e67123d9ecb2e79056Patch
Impacted products
Vendor Product Version
Linux Linux Version: 67dca5e580f1e93a66177389981541cac208c817
Version: 67dca5e580f1e93a66177389981541cac208c817
Version: 67dca5e580f1e93a66177389981541cac208c817
Version: 67dca5e580f1e93a66177389981541cac208c817
Version: 67dca5e580f1e93a66177389981541cac208c817
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   Linux Linux Version: 5.2
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