Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: PCI: vmd: Make vmd_dev::cfg_lock a raw_spinlock_t type The access to the PCI config space via pci_ops::read and pci_ops::write is a low-level hardware access. The functions can be accessed with disabled interrupts even on PREEMPT_RT. The pci_lock is a raw_spinlock_t for this purpose. A spinlock_t becomes a sleeping lock on PREEMPT_RT, so it cannot be acquired with disabled interrupts. The vmd_dev::cfg_lock is accessed in the same context as the pci_lock. Make vmd_dev::cfg_lock a raw_spinlock_t type so it can be used with interrupts disabled. This was reported as: BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 Call Trace: rt_spin_lock+0x4e/0x130 vmd_pci_read+0x8d/0x100 [vmd] pci_user_read_config_byte+0x6f/0xe0 pci_read_config+0xfe/0x290 sysfs_kf_bin_read+0x68/0x90 [bigeasy: reword commit message] Tested-off-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com> [kwilczynski: commit log] [bhelgaas: add back report info from https://lore.kernel.org/lkml/20241218115951.83062-1-ryotkkr98@gmail.com/]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 185a383ada2e7794b0e82e040223e741b24d2bf8 before c250262d6485ca333e9821f85b07eb383ec546b1; affected 185a383ada2e7794b0e82e040223e741b24d2bf8 before c2968c812339593ac6e2bdd5cc3adabe3f05fa53; affected 185a383ada2e7794b0e82e040223e741b24d2bf8 before 13e5148f70e81991acbe0bab5b1b50ba699116e7; affected 185a383ada2e7794b0e82e040223e741b24d2bf8 before 5c3cfcf0b4bf43530788b08a8eaf7896ec567484; affected 185a383ada2e7794b0e82e040223e741b24d2bf8 before 2358046ead696ca5c7c628d6c0e2c6792619a3e5; affected 185a383ada2e7794b0e82e040223e741b24d2bf8 before 20d0a9062c031068fa39f725a32f182b709b5525; affected 185a383ada2e7794b0e82e040223e741b24d2bf8 before 18056a48669a040bef491e63b25896561ee14d90 |
| Linux / Linux | affected 4.5; unaffected 0 before 4.5; unaffected 5.15.181 through 5.15.*; unaffected 6.1.135 through 6.1.*; unaffected 6.6.88 through 6.6.*; unaffected 6.12.24 through 6.12.*; unaffected 6.13.12 through 6.13.*; unaffected 6.14.3 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c250262d6485ca333e9821f85b07eb383ec546b1
- https://git.kernel.org/stable/c/c2968c812339593ac6e2bdd5cc3adabe3f05fa53
- https://git.kernel.org/stable/c/13e5148f70e81991acbe0bab5b1b50ba699116e7
- https://git.kernel.org/stable/c/5c3cfcf0b4bf43530788b08a8eaf7896ec567484
- https://git.kernel.org/stable/c/2358046ead696ca5c7c628d6c0e2c6792619a3e5
- https://git.kernel.org/stable/c/20d0a9062c031068fa39f725a32f182b709b5525
- https://git.kernel.org/stable/c/18056a48669a040bef491e63b25896561ee14d90
ADP enrichment
No English description supplied.