CVE - CVE-2023-52699

CVE-ID
CVE-2023-52699	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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).
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76 URL:https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76 MISC:https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f URL:https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f MISC:https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09 URL:https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09 MISC:https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1 URL:https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1 MISC:https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac URL:https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac MISC:https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3 URL:https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3 MISC:https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e URL:https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e MISC:https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927 URL:https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927
Assigning CNA
kernel.org
Date Record Created
20240307	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240307)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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