bpf: Fix bad unlock balance on freeze_mutex

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Commit c4c84f6fb2 ("bpf: drop unnecessary bpf_capable() check in
BPF_MAP_FREEZE command") moved the permissions check outside of the
freeze_mutex in the map_freeze() handler. The error paths still jumps
to the err_put which tries to unlock the freeze_mutex even though it
was not locked in the first place. Fix it.

Fixes: c4c84f6fb2 ("bpf: drop unnecessary bpf_capable() check in BPF_MAP_FREEZE command")
Reported-by: syzbot+8982e75c2878b9ffeac5@syzkaller.appspotmail.com
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

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Daniel Borkmann 2023-05-26 12:13:56 +02:00

parent 4aadd2920b

commit 4266f41fea

1 changed files with 2 additions and 2 deletions

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kernel/bpf/syscall.c

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