Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid f2fs_bug_on() in dec_valid_node_count() As Yanming reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215897 I have encountered a bug in F2FS file system in kernel v5.17. The kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can reproduce the bug by running the following commands: The kernel message is shown below: kernel BUG at fs/f2fs/f2fs.h:2511! Call Trace: f2fs_remove_inode_page+0x2a2/0x830 f2fs_evict_inode+0x9b7/0x1510 evict+0x282/0x4e0 do_unlinkat+0x33a/0x540 __x64_sys_unlinkat+0x8e/0xd0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae The root cause is: .total_valid_block_count or .total_valid_node_count could fuzzed to zero, then once dec_valid_node_count() was called, it will cause BUG_ON(), this patch fixes to print warning info and set SBI_NEED_FSCK into CP instead of panic.
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
39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 to < f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53affected39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 to < 2766ddaf45b69252bb8fe526b5b6e56904a9ae7aaffected39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 to < bce859358d3d5940aa858e40ceee70ee6e76130eaffected39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 to < 89d9a48d0cd30429463ea4e37ca83be6773ed5ebaffected39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 to < ccffa99ae6a1f44797b57444c6a80382a42928feaffected39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 to < 4d17e6fe9293d57081ffdc11e1cf313e25e8fd9eaffected
Linux Linux
Default version status: affected
3.8affected0 to < 3.8unaffected5.4.198 to ≤ 5.4.*unaffected5.10.121 to ≤ 5.10.*unaffected5.15.46 to ≤ 5.15.*unaffected5.17.14 to ≤ 5.17.*unaffected5.18.3 to ≤ 5.18.*unaffected5.19 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53 ↗
- https://git.kernel.org/stable/c/2766ddaf45b69252bb8fe526b5b6e56904a9ae7a ↗
- https://git.kernel.org/stable/c/bce859358d3d5940aa858e40ceee70ee6e76130e ↗
- https://git.kernel.org/stable/c/89d9a48d0cd30429463ea4e37ca83be6773ed5eb ↗
- https://git.kernel.org/stable/c/ccffa99ae6a1f44797b57444c6a80382a42928fe ↗
- https://git.kernel.org/stable/c/4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e ↗