• Amir Goldstein's avatar
    fuse: fix live lock in fuse_iget() · 775c5033
    Amir Goldstein authored
    Commit 5d069dbe ("fuse: fix bad inode") replaced make_bad_inode()
    in fuse_iget() with a private implementation fuse_make_bad().
    
    The private implementation fails to remove the bad inode from inode
    cache, so the retry loop with iget5_locked() finds the same bad inode
    and marks it bad forever.
    
    kmsg snip:
    
    [ ] rcu: INFO: rcu_sched self-detected stall on CPU
    ...
    [ ]  ? bit_wait_io+0x50/0x50
    [ ]  ? fuse_init_file_inode+0x70/0x70
    [ ]  ? find_inode.isra.32+0x60/0xb0
    [ ]  ? fuse_init_file_inode+0x70/0x70
    [ ]  ilookup5_nowait+0x65/0x90
    [ ]  ? fuse_init_file_inode+0x70/0x70
    [ ]  ilookup5.part.36+0x2e/0x80
    [ ]  ? fuse_init_file_inode+0x70/0x70
    [ ]  ? fuse_inode_eq+0x20/0x20
    [ ]  iget5_locked+0x21/0x80
    [ ]  ? fuse_inode_eq+0x20/0x20
    [ ]  fuse_iget+0x96/0x1b0
    
    Fixes: 5d069dbe ("fuse: fix bad inode")
    Cc: stable@vger.kernel.org # 5.10+
    Signed-off-by: default avatarAmir Goldstein <amir73il@gmail.com>
    Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
    775c5033
fuse_i.h 29.6 KB