Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: sysv: don't call sb_bread() with pointers_lock held syzbot is reporting sleep in atomic context in SysV filesystem [1], for sb_bread() is called with rw_spinlock held. A "write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock" bug and a "sb_bread() with write_lock(&pointers_lock)" bug were introduced by "Replace BKL for chain locking with sysvfs-private rwlock" in Linux 2.5.12. Then, "[PATCH] err1-40: sysvfs locking fix" in Linux 2.6.8 fixed the former bug by moving pointers_lock lock to the callers, but instead introduced a "sb_bread() with read_lock(&pointers_lock)" bug (which made this problem easier to hit). Al Viro suggested that why not to do like get_branch()/get_block()/ find_shared() in Minix filesystem does. And doing like that is almost a revert of "[PATCH] err1-40: sysvfs locking fix" except that get_branch() from with find_shared() is called without write_lock(&pointers_lock).
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 13b33feb2ebddc2b1aa607f553566b18a4af1d76; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 674c1c4229e743070e09db63a23442950ff000d1; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before fd203d2c671bdee9ab77090ff394d3b71b627927; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 53cb1e52c9db618c08335984d1ca80db220ccf09; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 89e8524135a3902e7563a5a59b7b5ec1bf4904ac; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a69224223746ab96d43e5db9d22d136827b7e2d3; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before f123dc86388cb669c3d6322702dc441abc35c31e |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 4.19.312 through 4.19.*; unaffected 5.4.274 through 5.4.*; unaffected 5.10.215 through 5.10.*; unaffected 5.15.155 through 5.15.*; unaffected 6.1.86 through 6.1.*; unaffected 6.6.27 through 6.6.*; unaffected 6.8.6 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76
- https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f
- https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1
- https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927
- https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09
- https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac
- https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3
- https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.
- https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76
- https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f
- https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1
- https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927
- https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09
- https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac
- https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3
- https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
No English description supplied.