CVE-2026-90420

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 < e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3affected
LinuxLinux9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 < 217b967ad7887a3e1ebc08f46f6484e081acd4b4affected
LinuxLinux9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 < 3bcdbdaac884a4baa59716cf9bd9470c75276e2daffected
LinuxLinux9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 < d7afca8e4efbf4c455b4663c29ae59fde2f1b671affected
LinuxLinux9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 < c07e5ad6539e7e9350d5c65cbf8adb69d1711b15affected
LinuxLinux9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 < 1fc6df85b4954b6fda9c351843aaca3c06f66d8daffected
LinuxLinux9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 < 8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8affected
LinuxLinux9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 < ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18affected
LinuxLinux2.6.30affected
LinuxLinux0 < 2.6.30unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References