Messages in this thread Patch in this message | | | Date | Sat, 25 Nov 2023 19:52:54 -0800 | Subject | Re: [syzbot] [crypto?] INFO: task hung in hwrng_fillfn | From | syzbot <> |
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Subject: [crypto?] INFO: task hung in hwrng_fillfn Author: eadavis@qq.com
please test task hung in hwrng_fillfn
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 98b1cc82c4af
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index 420f155d251f..ebfa5eab84df 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -501,7 +501,10 @@ static int hwrng_fillfn(void *unused) rng = get_current_rng(); if (IS_ERR(rng) || !rng) break; - mutex_lock(&reading_mutex); + if (mutex_lock_interruptible(&reading_mutex)) { + put_rng(rng); + return = -ERESTARTSYS; + } rc = rng_get_data(rng, rng_fillbuf, rng_buffer_size(), 1); if (current_quality != rng->quality)
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