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ptp: ptp_read should not release queue

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Firstly, queue is not the memory allocated in ptp_read;
Secondly, other processes may block at ptp_read and wait for conditions to be
met to perform read operations.

Acked-by: Richard Cochran <richardcochran@gmail.com>
Reported-and-tested-by: syzbot+df3f3ef31f60781fa911@syzkaller.appspotmail.com
Fixes: 8f5de6fb24 ("ptp: support multiple timestamp event readers")
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Link: https://lore.kernel.org/r/tencent_18747D76F1675A3C633772960237544AAA09@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Edward Adam Davis 2023-11-07 16:00:40 +08:00 committed by Jakub Kicinski
parent 9b818a340c
commit b714ca2ccf
1 changed files with 0 additions and 2 deletions
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2
drivers/ptp/ptp_chardev.c
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@ -585,7 +585,5 @@ ssize_t ptp_read(struct posix_clock_context *pccontext, uint rdflags,
free_event: free_event:
kfree(event); kfree(event);
exit: exit:
if (result < 0)
ptp_release(pccontext);
return result; return result;
} }