proc: s_fs_info may be NULL when proc_kill_sb is called
syzbot found that proc_fill_super() fails before filling up sb->s_fs_info, deactivate_locked_super() will be called and sb->s_fs_info will be NULL. The proc_kill_sb() does not expect fs_info to be NULL which is wrong. Link: https://lore.kernel.org/lkml/0000000000002d7ca605a7b8b1c5@google.com Reported-by:<syzbot+4abac52934a48af5ff19@syzkaller.appspotmail.com> Fixes: fa10fed3 ("proc: allow to mount many instances of proc in one pid namespace") Signed-off-by:
Alexey Gladkov <gladkov.alexey@gmail.com> Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com>
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9d78edea
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