CVE-2022-49380

published 2025-02-26

CVE-2022-49380: 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…

Priority P4 19 medium 5.5 CVSS 3.1

AV L AC L PR L UI N S U C N I N A H

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

17 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.18.5-1 (bookworm)	linux 5.18.5-1 (bookworm)
linux	linux	—	—
linux	linux	>= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53	f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53
linux	linux	>= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 2766ddaf45b69252bb8fe526b5b6e56904a9ae7a	2766ddaf45b69252bb8fe526b5b6e56904a9ae7a
linux	linux	>= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < bce859358d3d5940aa858e40ceee70ee6e76130e	bce859358d3d5940aa858e40ceee70ee6e76130e
linux	linux	>= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 89d9a48d0cd30429463ea4e37ca83be6773ed5eb	89d9a48d0cd30429463ea4e37ca83be6773ed5eb
linux	linux	>= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < ccffa99ae6a1f44797b57444c6a80382a42928fe	ccffa99ae6a1f44797b57444c6a80382a42928fe
linux	linux	>= 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 < 4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e	4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e
linux	linux_kernel	>= 0 < 5.10.127-1	5.10.127-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 0 < 5.18.5-1	5.18.5-1
linux	linux_kernel	>= 3.8 < 5.4.198	5.4.198
linux	linux_kernel	>= 5.11 < 5.15.46	5.15.46
linux	linux_kernel	>= 5.16 < 5.17.14	5.17.14
linux	linux_kernel	>= 5.18 < 5.18.3	5.18.3
linux	linux_kernel	>= 5.5 < 5.10.121	5.10.121

CVSS provenance

nvd v3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

osv 5.5 MEDIUM

vendor_debian 5.5 MEDIUM

vendor_redhat 5.5 MEDIUM

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