Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
80548b03991f58758a336424a90bf9f988e3b077 to < 67fb48c4a0874953212321cd5d57fdb4900dbc31affected80548b03991f58758a336424a90bf9f988e3b077 to < d648cc2069eb081707c061849046d909f57c78b1affected80548b03991f58758a336424a90bf9f988e3b077 to < d5b17474feed3c30991f07affa2473adbad95055affected80548b03991f58758a336424a90bf9f988e3b077 to < 867b3ea146a041023bfcd258e6db516b1bb28f19affected80548b03991f58758a336424a90bf9f988e3b077 to < ea19edf71721cd42f923e3c70f4ff995b422fe3baffected80548b03991f58758a336424a90bf9f988e3b077 to < 23b3d457d8387bcb2a61063a9e520063ada9335faffected80548b03991f58758a336424a90bf9f988e3b077 to < 70b2842734d831c908474779bb8a76daf55f782caffected80548b03991f58758a336424a90bf9f988e3b077 to < 0b70716081c6462be9b2928ad736d0d527b09678affected
Linux Linux
Default version status: affected
5.2affected0 to < 5.2unaffected5.10.261 to ≤ 5.10.*unaffected5.15.212 to ≤ 5.15.*unaffected6.1.178 to ≤ 6.1.*unaffected6.6.145 to ≤ 6.6.*unaffected6.12.97 to ≤ 6.12.*unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
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 ↗