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| author | Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | 2022-11-02 09:06:35 -0400 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-11-14 09:58:32 +0100 |
| commit | 448dca8c88755b768552e19bd1618be34ef6d1ff (patch) | |
| tree | 77d5b4a80a5ff940342c114c5eff22c886c85a30 /kernel/dma.c | |
| parent | 094226ad94f471a9f19e8f8e7140a09c2625abaa (diff) | |
| download | linux-448dca8c88755b768552e19bd1618be34ef6d1ff.tar.bz2 | |
rseq: Use pr_warn_once() when deprecated/unknown ABI flags are encountered
These commits use WARN_ON_ONCE() and kill the offending processes when
deprecated and unknown flags are encountered:
commit c17a6ff93213 ("rseq: Kill process when unknown flags are encountered in ABI structures")
commit 0190e4198e47 ("rseq: Deprecate RSEQ_CS_FLAG_NO_RESTART_ON_* flags")
The WARN_ON_ONCE() triggered by userspace input prevents use of
Syzkaller to fuzz the rseq system call.
Replace this WARN_ON_ONCE() by pr_warn_once() messages which contain
actually useful information.
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lkml.kernel.org/r/20221102130635.7379-1-mathieu.desnoyers@efficios.com
Diffstat (limited to 'kernel/dma.c')
0 files changed, 0 insertions, 0 deletions