linux

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Sumanth Korikkar 645df4047b s390/signal: fix endless loop in do_signal

No upstream commit exists: the problem addressed here is that 'commit
75309018a24d ("s390: add support for TIF_NOTIFY_SIGNAL")' was backported
to 5.10. This commit is broken, but nobody noticed upstream, since
shortly after s390 converted to generic entry with 'commit 56e62a737028
("s390: convert to generic entry")', which implicitly fixed the problem
outlined below.

Thread flag is set to TIF_NOTIFY_SIGNAL for io_uring work.  The io work
user or syscall calls do_signal when either one of the TIF_SIGPENDING or
TIF_NOTIFY_SIGNAL flag is set.  However, do_signal does consider only
TIF_SIGPENDING signal and ignores TIF_NOTIFY_SIGNAL condition.  This
means get_signal is never invoked  for TIF_NOTIFY_SIGNAL and hence the
flag is not cleared, which results in an endless do_signal loop.

Reference: 'commit 788d0824269b ("io_uring: import 5.15-stable io_uring")'
Fixes: 75309018a24d ("s390: add support for TIF_NOTIFY_SIGNAL")
Cc: stable@vger.kernel.org  # 5.10.162
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-02-22 12:55:54 +01:00

alpha

exit: Add and use make_task_dead.

2023-02-01 08:23:19 +01:00

arc

arch: setup PF_IO_WORKER threads like PF_KTHREAD

2023-01-04 11:39:22 +01:00

arm

ARM: dts: vf610: Fix pca9548 i2c-mux node names

2023-02-06 07:56:15 +01:00

arm64

arm64: dts: meson-axg: Make mmc host controller interrupts level-sensitive