FUSE sometimes freezes, making it impossible to unmount the filesystem or even kill the processes accessing it
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
fuse (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
I had a directory mounted using sshfs. When I disconnected from the network, sshfs froze, making it impossible to unmount the directory. "fusermount -u" complained that the filesystem was busy. "fusermount -z -u" appeared to unmount it - but all programs that were accessing it earlier were still frozen. Killing the "sshfs" process didn't help. I can't even kill any of the programs that froze - they're stuck in uninterruptible sleep.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: fuse 2.8.6-2ubuntu2
ProcVersionSign
Uname: Linux 3.2.0-29-generic x86_64
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
Date: Thu Aug 2 11:54:48 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcEnviron:
TERM=xterm
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: fuse
UpgradeStatus: No upgrade log present (probably fresh install)
It also prevents the system from suspending:
Aug 7 20:31:29 dima-xps kernel: [28554.059134] Freezing of tasks failed after 20.00 seconds (1 tasks refusing to freeze, wq_busy=0): fbb>] ? recalc_ sigpending+ 0x1b/0x50 9cf>] schedule+0x3f/0x60 c15>] request_ wait_answer+ 0x85/0x230 a50>] ? add_wait_ queue+0x60/ 0x60 e35>] fuse_request_ send+0x75/ 0xb0 56d>] fuse_dentry_ revalidate+ 0x14d/0x280 85b>] do_lookup+ 0x18b/0x310 8ac>] ? security_ inode_permissio n+0x1c/ 0x30 1d8>] link_path_ walk+0x138/ 0x870 41d>] ? path_init+ 0x2ed/0x3c0 548>] path_lookupat+ 0x58/0x750 db7>] ? __strncpy_ from_user+ 0x27/0x60 c71>] do_path_ lookup+ 0x31/0xc0 779>] user_path_ at_empty+ 0x59/0xa0 152>] ? fsnotify+ 0x1c2/0x2a0 bc5>] ? _raw_spin_ lock_irq+ 0x15/0x20 7d1>] user_path_ at+0x11/ 0x20 80a>] vfs_fstatat+ 0x3a/0x70 85e>] vfs_lstat+0x1e/0x20 9fa>] sys_newlstat+ 0x1a/0x40 ba0>] ? vfs_write+ 0x110/0x180 e87>] ? sys_write+0x67/0x90 ec2>] system_ call_fastpath+ 0x16/0x1b
Aug 7 20:31:29 dima-xps kernel: [28554.059203] gedit D 0000000000000001 0 6819 1 0x00800004
Aug 7 20:31:29 dima-xps kernel: [28554.059207] ffff8800546d9a18 0000000000000082 ffffffff81079fbb ffff88006725dc00
Aug 7 20:31:29 dima-xps kernel: [28554.059211] ffff8800546d9fd8 ffff8800546d9fd8 ffff8800546d9fd8 0000000000013780
Aug 7 20:31:29 dima-xps kernel: [28554.059214] ffff8800b30f0000 ffff88006725dc00 ffff8800546d9a28 ffff8801150d3b60
Aug 7 20:31:29 dima-xps kernel: [28554.059218] Call Trace:
Aug 7 20:31:29 dima-xps kernel: [28554.059225] [<ffffffff81079
Aug 7 20:31:29 dima-xps kernel: [28554.059230] [<ffffffff81657
Aug 7 20:31:29 dima-xps kernel: [28554.059235] [<ffffffff81278
Aug 7 20:31:29 dima-xps kernel: [28554.059238] [<ffffffff8108a
Aug 7 20:31:29 dima-xps kernel: [28554.059241] [<ffffffff81278
Aug 7 20:31:29 dima-xps kernel: [28554.059244] [<ffffffff8127d
Aug 7 20:31:29 dima-xps kernel: [28554.059248] [<ffffffff81184
Aug 7 20:31:29 dima-xps kernel: [28554.059251] [<ffffffff8129c
Aug 7 20:31:29 dima-xps kernel: [28554.059254] [<ffffffff81185
Aug 7 20:31:29 dima-xps kernel: [28554.059256] [<ffffffff81186
Aug 7 20:31:29 dima-xps kernel: [28554.059259] [<ffffffff81186
Aug 7 20:31:29 dima-xps kernel: [28554.059263] [<ffffffff81318
Aug 7 20:31:29 dima-xps kernel: [28554.059266] [<ffffffff81186
Aug 7 20:31:29 dima-xps kernel: [28554.059268] [<ffffffff81187
Aug 7 20:31:29 dima-xps kernel: [28554.059273] [<ffffffff811b6
Aug 7 20:31:29 dima-xps kernel: [28554.059276] [<ffffffff81659
Aug 7 20:31:29 dima-xps kernel: [28554.059278] [<ffffffff81187
Aug 7 20:31:29 dima-xps kernel: [28554.059282] [<ffffffff8117c
Aug 7 20:31:29 dima-xps kernel: [28554.059284] [<ffffffff8117c
Aug 7 20:31:29 dima-xps kernel: [28554.059287] [<ffffffff8117c
Aug 7 20:31:29 dima-xps kernel: [28554.059289] [<ffffffff81177
Aug 7 20:31:29 dima-xps kernel: [28554.059292] [<ffffffff81177
Aug 7 20:31:29 dima-xps kernel: [28554.059295] [<ffffffff81661
Aug 7 20:31:29 dima-xps kernel: [28554.059319]
Aug 7 20:31:29 dima-xps kernel: [28554.059320] Restarting tasks ...