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.
How to fix
- Linux Linuxe3e9367dae1a6392cbb14ab0b2ab5edbf39735c3, 217b967ad7887a3e1ebc08f46f6484e081acd4b4, 3bcdbdaac884a4baa59716cf9bd9470c75276e2d, d7afca8e4efbf4c455b4663c29ae59fde2f1b671, c07e5ad6539e7e9350d5c65cbf8adb69d1711b15, 1fc6df85b4954b6fda9c351843aaca3c06f66d8d, 8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8, ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ≤ v < e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3, 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ≤ v < 217b967ad7887a3e1ebc08f46f6484e081acd4b4, 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ≤ v < 3bcdbdaac884a4baa59716cf9bd9470c75276e2d, 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ≤ v < d7afca8e4efbf4c455b4663c29ae59fde2f1b671, 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ≤ v < c07e5ad6539e7e9350d5c65cbf8adb69d1711b15, 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ≤ v < 1fc6df85b4954b6fda9c351843aaca3c06f66d8d, 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ≤ v < 8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8, 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 ≤ v < ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18, 2.6.30 | e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3, 217b967ad7887a3e1ebc08f46f6484e081acd4b4, 3bcdbdaac884a4baa59716cf9bd9470c75276e2d, d7afca8e4efbf4c455b4663c29ae59fde2f1b671, c07e5ad6539e7e9350d5c65cbf8adb69d1711b15, 1fc6df85b4954b6fda9c351843aaca3c06f66d8d, 8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8, ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18 |
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