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b8ce1b9d25
[ 3784.910888] BUG: kernel NULL pointer dereference, address: 0000000000000020
[ 3784.910904] RIP: 0010:__io_file_supports_nowait+0x5/0xc0
[ 3784.910926] Call Trace:
[ 3784.910928] ? io_read+0x17c/0x480
[ 3784.910945] io_issue_sqe+0xcb/0x1840
[ 3784.910953] __io_queue_sqe+0x44/0x300
[ 3784.910959] io_req_task_submit+0x27/0x70
[ 3784.910962] tctx_task_work+0xeb/0x1d0
[ 3784.910966] task_work_run+0x61/0xa0
[ 3784.910968] io_run_task_work_sig+0x53/0xa0
[ 3784.910975] __x64_sys_io_uring_enter+0x22/0x30
[ 3784.910977] do_syscall_64+0x3d/0x90
[ 3784.910981] entry_SYSCALL_64_after_hwframe+0x44/0xae
io_drain_req() goes before checks for REQ_F_FAIL, which protect us from
submitting under-prepared request (e.g. failed in io_init_req(). Fail
such drained requests as well.
Fixes: a8295b982c ("io_uring: fix failed linkchain code logic")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/e411eb9924d47a131b1e200b26b675df0c2b7627.1630415423.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.