Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: afs: fix NULL pointer dereference in afs_get_tree() afs_alloc_sbi() uses kzalloc for memory allocation. And, if ctx->dyn_root is not null, as->cell and as->volume are null. In trace_afs_get_tree() they are dereferenced. KASAN error message: KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550 include/trace/events/afs.h:1365 Call Trace: trace_afs_get_tree include/trace/events/afs.h:1365 [inline] afs_get_tree+0x922/0x1350 fs/afs/super.c:599 vfs_get_tree+0x8e/0x300 fs/super.c:1572 do_new_mount fs/namespace.c:3011 [inline] path_mount+0x14a5/0x2220 fs/namespace.c:3341 do_mount fs/namespace.c:3354 [inline] __do_sys_mount fs/namespace.c:3562 [inline] __se_sys_mount fs/namespace.c:3539 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3539 do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 80548b03991f58758a336424a90bf9f988e3b077 before 67fb48c4a0874953212321cd5d57fdb4900dbc31; affected 80548b03991f58758a336424a90bf9f988e3b077 before d648cc2069eb081707c061849046d909f57c78b1; affected 80548b03991f58758a336424a90bf9f988e3b077 before d5b17474feed3c30991f07affa2473adbad95055; affected 80548b03991f58758a336424a90bf9f988e3b077 before 867b3ea146a041023bfcd258e6db516b1bb28f19; affected 80548b03991f58758a336424a90bf9f988e3b077 before ea19edf71721cd42f923e3c70f4ff995b422fe3b; affected 80548b03991f58758a336424a90bf9f988e3b077 before 23b3d457d8387bcb2a61063a9e520063ada9335f; affected 80548b03991f58758a336424a90bf9f988e3b077 before 70b2842734d831c908474779bb8a76daf55f782c; affected 80548b03991f58758a336424a90bf9f988e3b077 before 0b70716081c6462be9b2928ad736d0d527b09678 |
| Linux / Linux | affected 5.2; unaffected 0 before 5.2; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/67fb48c4a0874953212321cd5d57fdb4900dbc31
- https://git.kernel.org/stable/c/d648cc2069eb081707c061849046d909f57c78b1
- https://git.kernel.org/stable/c/d5b17474feed3c30991f07affa2473adbad95055
- https://git.kernel.org/stable/c/867b3ea146a041023bfcd258e6db516b1bb28f19
- https://git.kernel.org/stable/c/ea19edf71721cd42f923e3c70f4ff995b422fe3b
- https://git.kernel.org/stable/c/23b3d457d8387bcb2a61063a9e520063ada9335f
- https://git.kernel.org/stable/c/70b2842734d831c908474779bb8a76daf55f782c
- https://git.kernel.org/stable/c/0b70716081c6462be9b2928ad736d0d527b09678