CVE - CVE-2021-47124

CVE-ID
CVE-2021-47124	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: io_uring: fix link timeout refs WARNING: CPU: 0 PID: 10242 at lib/refcount.c:28 refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 RIP: 0010:refcount_warn_saturate+0x15b/0x1a0 lib/refcount.c:28 Call Trace: __refcount_sub_and_test include/linux/refcount.h:283 [inline] __refcount_dec_and_test include/linux/refcount.h:315 [inline] refcount_dec_and_test include/linux/refcount.h:333 [inline] io_put_req fs/io_uring.c:2140 [inline] io_queue_linked_timeout fs/io_uring.c:6300 [inline] __io_queue_sqe+0xbef/0xec0 fs/io_uring.c:6354 io_submit_sqe fs/io_uring.c:6534 [inline] io_submit_sqes+0x2bbd/0x7c50 fs/io_uring.c:6660 __do_sys_io_uring_enter fs/io_uring.c:9240 [inline] __se_sys_io_uring_enter+0x256/0x1d60 fs/io_uring.c:9182 io_link_timeout_fn() should put only one reference of the linked timeout request, however in case of racing with the master request's completion first io_req_complete() puts one and then io_put_req_deferred() is called.
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/0b2a990e5d2f76d020cb840c456e6ec5f0c27530 URL:https://git.kernel.org/stable/c/0b2a990e5d2f76d020cb840c456e6ec5f0c27530 MISC:https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff URL:https://git.kernel.org/stable/c/6f5d7a45f58d3abe3a936de1441b8d6318f978ff MISC:https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410 URL:https://git.kernel.org/stable/c/876808dba2ff7509bdd7f230c4f374a0caf4f410 MISC:https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 URL:https://git.kernel.org/stable/c/a298232ee6b9a1d5d732aa497ff8be0d45b5bd82 MISC:https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86 URL:https://git.kernel.org/stable/c/ff4a96ba5c8f9b266706280ff8021d2ef3f17e86
Assigning CNA
kernel.org
Date Record Created
20240304	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 (20240304)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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