syzbot


INFO: task hung in user_get_super (2)

Status: upstream: reported C repro on 2023/11/19 11:27
Subsystems: fs
[Documentation on labels]
Reported-by: syzbot+ba09f4a317431df6cddf@syzkaller.appspotmail.com
First crash: 411d, last: 1d02h
Discussions (5)
Title Replies (including bot) Last reply
[syzbot] Monthly fs report (Mar 2024) 0 (1) 2024/03/16 12:09
[syzbot] Monthly fs report (Feb 2024) 0 (1) 2024/02/12 21:31
[syzbot] Monthly fs report (Dec 2023) 0 (1) 2023/12/12 22:02
[syzbot] Test 0 (1) 2023/11/19 12:31
[syzbot] [fs?] INFO: task hung in user_get_super (2) 0 (1) 2023/11/19 11:27
Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 INFO: task hung in user_get_super 2 401d 408d 0/3 auto-obsoleted due to no activity on 2023/08/15 03:00
linux-5.15 INFO: task hung in user_get_super 6 218d 396d 0/3 auto-obsoleted due to no activity on 2024/01/25 03:23
linux-5.15 INFO: task hung in user_get_super (2) 1 53d 53d 0/3 upstream: reported on 2024/03/30 17:00
linux-6.1 INFO: task hung in user_get_super (2) 14 17d 184d 0/3 upstream: reported on 2023/11/20 11:19
upstream INFO: task hung in user_get_super fs 1 510d 510d 0/26 auto-obsoleted due to no activity on 2023/04/06 01:17
Last patch testing requests (1)
Created Duration User Patch Repo Result
2023/11/19 12:31 20m tintinm2017@gmail.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log

Sample crash report:
INFO: task syz-executor214:6157 blocked for more than 143 seconds.
      Not tainted 6.6.0-rc7-syzkaller-g8de1e7afcc1c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor214 state:D stack:0     pid:6157  ppid:6136   flags:0x00000005
Call trace:
 __switch_to+0x314/0x560 arch/arm64/kernel/process.c:556
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x1364/0x23b4 kernel/sched/core.c:6695
 schedule+0xc4/0x170 kernel/sched/core.c:6771
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6830
 rwsem_down_read_slowpath+0x57c/0xe58 kernel/locking/rwsem.c:1086
 __down_read_common kernel/locking/rwsem.c:1250 [inline]
 __down_read kernel/locking/rwsem.c:1263 [inline]
 down_read+0xa0/0x2fc kernel/locking/rwsem.c:1522
 __super_lock fs/super.c:58 [inline]
 super_lock+0x160/0x328 fs/super.c:117
 user_get_super+0xe8/0x1a0 fs/super.c:1059
 quotactl_block fs/quota/quota.c:890 [inline]
 __do_sys_quotactl fs/quota/quota.c:955 [inline]
 __se_sys_quotactl fs/quota/quota.c:917 [inline]
 __arm64_sys_quotactl+0x508/0xca0 fs/quota/quota.c:917
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffff80008e513840 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:302
2 locks held by getty/5843:
 #0: ffff0000d76ba0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800094c002f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2206
1 lock held by syz-executor214/6156:
1 lock held by syz-executor214/6157:
 #0: ffff0000d83500e0 (&type->s_umount_key#44){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff0000d83500e0 (&type->s_umount_key#44){++++}-{3:3}, at: super_lock+0x160/0x328 fs/super.c:117

=============================================


Crashes (273):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/11/19 11:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8de1e7afcc1c cb976f63 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 INFO: task hung in user_get_super
2024/05/21 22:01 upstream b6394d6f7159 1014eca7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/05/17 09:56 upstream ea5f6ad9ad96 c2e07261 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/05/16 14:42 upstream 3c999d1ae3c7 ef5d53ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/05/13 03:19 upstream ba16c1cf11c9 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in user_get_super
2024/05/11 16:18 upstream cf87f46fd34d 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in user_get_super
2024/05/10 04:18 upstream 45db3ab70092 de979bc2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in user_get_super
2024/05/08 04:23 upstream dccb07f2914c 4cf3f9b3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/05/05 22:52 upstream b9158815de52 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/05/05 12:53 upstream 7367539ad4b0 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/05/05 08:11 upstream 7367539ad4b0 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/05/05 07:59 upstream 7367539ad4b0 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/05/05 04:49 upstream 7367539ad4b0 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in user_get_super
2024/05/04 01:11 upstream 3d25a941ea50 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/04/30 22:05 upstream 98369dccd2f8 3ce4924c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/04/29 03:52 upstream e67572cd2204 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/04/28 04:50 upstream 5d12ed4bea43 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/04/28 02:37 upstream 5d12ed4bea43 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/04/27 22:08 upstream 5d12ed4bea43 07b455f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in user_get_super
2024/04/26 13:54 upstream c942a0cd3603 059e9963 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in user_get_super
2024/04/26 09:23 upstream e33c4963bf53 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/04/25 15:12 upstream e88c4cfcb7b8 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/04/23 16:05 upstream 71b1543c83d6 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in user_get_super
2024/04/23 09:39 upstream 4d2008430ce8 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in user_get_super
2024/04/21 04:36 upstream 977b1ef51866 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in user_get_super
2024/03/11 02:41 upstream 137e0ec05aeb 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in user_get_super
2024/03/09 11:48 upstream 10d48d70e82d 6ee49f2e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/03/02 06:55 upstream 17ba56605bfd 25905f5d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/03/01 16:58 upstream 87adedeba51a 83acf9e0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/02/21 12:22 upstream 9fc1ccccfd8d 3af7dd65 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/02/12 02:49 upstream 841c35169323 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/02/08 09:45 upstream 547ab8fc4cb0 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/02/07 02:03 upstream 99bd3cb0d12e 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in user_get_super
2024/02/06 15:50 upstream 99bd3cb0d12e 6404acf9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/01/30 10:02 upstream 861c0981648f 991a98f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/01/27 00:51 upstream 168174d78157 cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/01/24 11:27 upstream 615d30064886 1e153dc8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/01/16 16:18 upstream 052d534373b7 2a7bcc7f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2024/01/08 01:57 upstream 0dd3ee311255 d0304e9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2023/06/13 10:32 upstream fb054096aea0 749afb64 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2023/06/11 14:39 upstream 022ce8862dff 7086cdb9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in user_get_super
2023/05/30 13:15 upstream 8b817fded42d cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in user_get_super
2024/05/14 09:39 linux-next 26dd54d03cd9 fdb4c10c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in user_get_super
2024/05/12 22:16 linux-next 75fa778d74b7 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in user_get_super
2024/05/08 23:57 linux-next e7b4ef8fffac 20bf80e1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in user_get_super
2024/05/08 11:16 linux-next e7b4ef8fffac 4cf3f9b3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in user_get_super
2024/05/08 11:15 linux-next e7b4ef8fffac 4cf3f9b3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in user_get_super
2024/05/08 03:21 linux-next 93a39e476608 4cf3f9b3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in user_get_super
2024/05/08 01:05 linux-next 93a39e476608 cb2dcc0e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in user_get_super
2024/04/22 06:35 linux-next 7b4f2bc91c15 af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in user_get_super
2024/03/23 08:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 707081b61156 0ea90952 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in user_get_super
2024/02/18 06:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 905b00721763 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in user_get_super
2024/02/17 16:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 905b00721763 578f7538 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in user_get_super
* Struck through repros no longer work on HEAD.