Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ext4: fix timer use-after-free on failed mount Syzbot has found an ODEBUG bug in ext4_fill_super The del_timer_sync function cancels the s_err_report timer, which reminds about filesystem errors daily. We should guarantee the timer is no longer active before kfree(sbi). When filesystem mounting fails, the flow goes to failed_mount3, where an error occurs when ext4_stop_mmpd is called, causing a read I/O failure. This triggers the ext4_handle_error function that ultimately re-arms the timer, leaving the s_err_report timer active before kfree(sbi) is called. Fix the issue by canceling the s_err_report timer after calling ext4_stop_mmpd.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 5e4f5138bd8522ebe231a137682d3857209a2c07 before 7aac0c17a8cdf4a3236991c1e60435c6a984076c; affected 618f003199c6188e01472b03cdbba227f1dc5f24 before 22e9b83f0f33bc5a7a3181769d1dccbf021f5b04; affected 618f003199c6188e01472b03cdbba227f1dc5f24 before cf3196e5e2f36cd80dab91ffae402e13935724bc; affected 618f003199c6188e01472b03cdbba227f1dc5f24 before 9203817ba46ebba7c865c8de2aba399537b6e891; affected 618f003199c6188e01472b03cdbba227f1dc5f24 before fa78fb51d396f4f2f80f8e96a3b1516f394258be; affected 618f003199c6188e01472b03cdbba227f1dc5f24 before b85569585d0154d4db1e4f9e3e6a4731d407feb0; affected 618f003199c6188e01472b03cdbba227f1dc5f24 before 0ce160c5bdb67081a62293028dc85758a8efb22a; affected cecfdb9cf9a700d1037066173abac0617f6788df; affected eb7b40d9d3785f7a131fb0b1f89bb6efa46c1833; affected 5.10.51 before 5.10.237; affected 5.12.18 before 5.13; affected 5.13.3 before 5.14 |
| Linux / Linux | affected 5.14; unaffected 0 before 5.14; unaffected 5.10.237 through 5.10.*; unaffected 5.15.181 through 5.15.*; unaffected 6.1.118 through 6.1.*; unaffected 6.6.55 through 6.6.*; unaffected 6.10.14 through 6.10.*; unaffected 6.11.3 through 6.11.*; unaffected 6.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7aac0c17a8cdf4a3236991c1e60435c6a984076c
- https://git.kernel.org/stable/c/22e9b83f0f33bc5a7a3181769d1dccbf021f5b04
- https://git.kernel.org/stable/c/cf3196e5e2f36cd80dab91ffae402e13935724bc
- https://git.kernel.org/stable/c/9203817ba46ebba7c865c8de2aba399537b6e891
- https://git.kernel.org/stable/c/fa78fb51d396f4f2f80f8e96a3b1516f394258be
- https://git.kernel.org/stable/c/b85569585d0154d4db1e4f9e3e6a4731d407feb0
- https://git.kernel.org/stable/c/0ce160c5bdb67081a62293028dc85758a8efb22a
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.