nilfs2: fix possible int overflows in nilfs_fiemap()
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.3%
exploitation probability
0.3%top 84% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix possible int overflows in nilfs_fiemap()
Since nilfs_bmap_lookup_contig() in nilfs_fiemap() calculates its result
by being prepared to go through potentially maxblocks == INT_MAX blocks,
the value in n may experience an overflow caused by left shift of blkbits.
While it is extremely unlikely to occur, play it safe and cast right hand
expression to wider type to mitigate the issue.
Found by Linux Verification Center (linuxtesting.org) with static analysis
tool SVACE.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/250423300b4b0335918be187ef3cade248c06e6ahttps://git.kernel.org/stable/c/58b1c6881081f5ddfb9a14dc241a74732c0f855chttps://git.kernel.org/stable/c/6438ef381c183444f7f9d1de18f22661cba1e946https://git.kernel.org/stable/c/7649937987fed51ed09985da4019d50189fc534ehttps://git.kernel.org/stable/c/8f41df5fd4c11d26e929a85f7239799641f92da7https://git.kernel.org/stable/c/b9495a9109abc31d3170f7aad7d48aa64610a1a2https://git.kernel.org/stable/c/f2bd0f1ab47822fe5bd699c8458b896c4b2edea1https://git.kernel.org/stable/c/f3d80f34f58445355fa27b9579a449fb186aa64ehttps://lists.debian.org/debian-lts-announce/2025/03/msg00028.htmlhttps://lists.debian.org/debian-lts-announce/2025/05/msg00030.html