CVE-2026-90420
Description
In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix infinite loop in nilfs_clean_segments()
syzbot reported a hung task in nilfs_transaction_begin(). This occurs because the cleaner ioctl falls into an infinite loop if nilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device is remounted as read-only after an I/O error).
Currently in nilfs_clean_segments(), if err is non-zero, it logs the error and sleeps but doesn't abort when it encounters a terminal error like -EROFS. This causes the thread to loop forever.
Fix this by breaking out of the loop if nilfs_segctor_construct() returns -EROFS. This matches the behaviour in nilfs_segctor_write_out(), which also handles -EROFS.
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Affected products
2Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/1fc6df85b4954b6fda9c351843aaca3c06f66d8dnvd
- git.kernel.org/stable/c/217b967ad7887a3e1ebc08f46f6484e081acd4b4nvd
- git.kernel.org/stable/c/3bcdbdaac884a4baa59716cf9bd9470c75276e2dnvd
- git.kernel.org/stable/c/8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8nvd
- git.kernel.org/stable/c/c07e5ad6539e7e9350d5c65cbf8adb69d1711b15nvd
- git.kernel.org/stable/c/ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18nvd
- git.kernel.org/stable/c/d7afca8e4efbf4c455b4663c29ae59fde2f1b671nvd
- git.kernel.org/stable/c/e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3nvd
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