cve-2024-26956
Vulnerability from cvelistv5
Published
2024-05-01 05:18
Modified
2024-11-05 09:18
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
nilfs2: fix failure to detect DAT corruption in btree and direct mappings
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2e2619ff5d0def4bb6c2037a32a6eaa28dd95c84
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46b832e09d43b394ac0f6d9485d2b1a06593f0b7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/82827ca21e7c8a91384c5baa656f78a5adfa4ab4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9cbe1ad5f4354f4df1445e5f4883983328cd6d8e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8e4d098de1c0f4c5c1f2ed4633a860f0da6d713
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b67189690eb4b7ecc84ae16fa1e880e0123eaa35
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3b5c5c31e723b568f83d8cafab8629d9d830ffb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f2f26b4a84a0ef41791bd2d70861c8eac748f4ba
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f69e81396aea66304d214f175aa371f1b5578862
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

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Since there are two\\nflaws involved, I\u0027ve made each one a separate patch.\\n\\nThe first patch alone resolves the syzbot-reported bug, but I think\\nboth fixes should be sent to stable, so I\u0027ve tagged them as such.\\n\\n\\nThis patch (of 2):\\n\\nSyzbot has reported a kernel bug in submit_bh_wbc() when writing file data\\nto a nilfs2 file system whose metadata is corrupted.\\n\\nThere are two flaws involved in this issue.\\n\\nThe first flaw is that when nilfs_get_block() locates a data block using\\nbtree or direct mapping, if the disk address translation routine\\nnilfs_dat_translate() fails with internal code -ENOENT due to DAT metadata\\ncorruption, it can be passed back to nilfs_get_block().  This causes\\nnilfs_get_block() to misidentify an existing block as non-existent,\\ncausing both data block lookup and insertion to fail inconsistently.\\n\\nThe second flaw is that nilfs_get_block() returns a successful status in\\nthis inconsistent state.  This causes the caller __block_write_begin_int()\\nor others to request a read even though the buffer is not mapped,\\nresulting in a BUG_ON check for the BH_Mapped flag in submit_bh_wbc()\\nfailing.\\n\\nThis fixes the first issue by changing the return value to code -EINVAL\\nwhen a conversion using DAT fails with code -ENOENT, avoiding the\\nconflicting condition that leads to the kernel bug described above.  Here,\\ncode -EINVAL indicates that metadata corruption was detected during the\\nblock lookup, which will be properly handled as a file system error and\\nconverted to -EIO when passing through the nilfs2 bmap layer.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nilfs2: corrige el error al detectar da\u00f1os en DAT en btree y asignaciones directas Serie de parches \\\"nilfs2: corrige el error del kernel en submit_bh_wbc()\\\". Esto resuelve un ERROR del kernel informado por syzbot. 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