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[cbr79] Many VULNs 9-9-25 #560

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Merged
merged 3 commits into from
Sep 9, 2025
Merged

[cbr79] Many VULNs 9-9-25 #560

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920f2be
posix-cpu-timers: fix race between handle_posix_cpu_timers() and posi…
bmastbergen Sep 9, 2025
c04f19e
drivers:md:fix a potential use-after-free bug
bmastbergen Sep 9, 2025
a963322
crypto: algif_hash - fix double free in hash_accept
bmastbergen Sep 9, 2025
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4 changes: 0 additions & 4 deletions crypto/algif_hash.c
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Original file line number Diff line number Diff line change
Expand Up @@ -284,10 +284,6 @@ static int hash_accept(struct socket *sock, struct socket *newsock, int flags)
return err;

err = crypto_ahash_import(&ctx2->req, state);
if (err) {
sock_orphan(sk2);
sock_put(sk2);
}

return err;
}
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2 changes: 1 addition & 1 deletion drivers/md/raid5.c
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Expand Up @@ -2678,10 +2678,10 @@ static void raid5_end_write_request(struct bio *bi, int error)
if (!test_and_clear_bit(R5_DOUBLE_LOCKED, &sh->dev[i].flags))
clear_bit(R5_LOCKED, &sh->dev[i].flags);
set_bit(STRIPE_HANDLE, &sh->state);
raid5_release_stripe(sh);

if (sh->batch_head && sh != sh->batch_head)
raid5_release_stripe(sh->batch_head);
raid5_release_stripe(sh);
}

static void raid5_error(struct mddev *mddev, struct md_rdev *rdev)
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9 changes: 9 additions & 0 deletions kernel/posix-cpu-timers.c
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Expand Up @@ -1325,6 +1325,15 @@ void run_posix_cpu_timers(struct task_struct *tsk)

BUG_ON(!irqs_disabled());

/*
* Ensure that release_task(tsk) can't happen while
* handle_posix_cpu_timers() is running. Otherwise, a concurrent
* posix_cpu_timer_del() may fail to lock_task_sighand(tsk) and
* miss timer->it.cpu.firing != 0.
*/
if (tsk->exit_state)
return;

/*
* The fast path checks that there are no expired thread or thread
* group timers. If that's so, just return.
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