Vulnerability CVE-2024-26764
Published: 2024-04-03

Description:
In the Linux kernel, the following vulnerability has been resolved:

fs/aio: Restrict kiocb_set_cancel_fn() to I/O submitted via libaio

If kiocb_set_cancel_fn() is called for I/O submitted via io_uring, the
following kernel warning appears:

WARNING: CPU: 3 PID: 368 at fs/aio.c:598 kiocb_set_cancel_fn+0x9c/0xa8
Call trace:
kiocb_set_cancel_fn+0x9c/0xa8
ffs_epfile_read_iter+0x144/0x1d0
io_read+0x19c/0x498
io_issue_sqe+0x118/0x27c
io_submit_sqes+0x25c/0x5fc
__arm64_sys_io_uring_enter+0x104/0xab0
invoke_syscall+0x58/0x11c
el0_svc_common+0xb4/0xf4
do_el0_svc+0x2c/0xb0
el0_svc+0x2c/0xa4
el0t_64_sync_handler+0x68/0xb4
el0t_64_sync+0x1a4/0x1a8

Fix this by setting the IOCB_AIO_RW flag for read and write I/O that is
submitted by libaio.

 References:
https://git.kernel.org/stable/c/337b543e274fe7a8f47df3c8293cc6686ffa620f
https://git.kernel.org/stable/c/b4eea7a05ee0ab5ab0514421e6ba8c5d249cf942
https://git.kernel.org/stable/c/ea1cd64d59f22d6d13f367d62ec6e27b9344695f
https://git.kernel.org/stable/c/d7b6fa97ec894edd02f64b83e5e72e1aa352f353
https://git.kernel.org/stable/c/18f614369def2a11a52f569fe0f910b199d13487
https://git.kernel.org/stable/c/e7e23fc5d5fe422827c9a43ecb579448f73876c7
https://git.kernel.org/stable/c/1dc7d74fe456944a9b1c57bd776280249f441ac6
https://git.kernel.org/stable/c/b820de741ae48ccf50dd95e297889c286ff4f760
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