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authorEric Biggers <ebiggers@google.com>2019-06-12 11:43:13 -0700
committerAl Viro <viro@zeniv.linux.org.uk>2019-06-17 17:36:07 -0400
commit1b0b9cc8d3793e31b313e6c9685513b08cd883c4 (patch)
tree35a629a4bfb4025cf8a49335d5d3d39dd0187d01 /fs/pnode.c
parent9e0babf2c06c73cda2c0cd37a1653d823adb40ec (diff)
vfs: fsmount: add missing mntget()
sys_fsmount() needs to take a reference to the new mount when adding it to the anonymous mount namespace. Otherwise the filesystem can be unmounted while it's still in use, as found by syzkaller. Reported-by: Mark Rutland <mark.rutland@arm.com> Reported-by: syzbot+99de05d099a170867f22@syzkaller.appspotmail.com Reported-by: syzbot+7008b8b8ba7df475fdc8@syzkaller.appspotmail.com Fixes: 93766fbd2696 ("vfs: syscall: Add fsmount() to create a mount for a superblock") Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/pnode.c')
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