syzbot


BUG: sleeping function called from invalid context in gfs2_make_fs_ro

Status: fixed on 2024/01/30 15:47
Subsystems: gfs2
[Documentation on labels]
Reported-by: syzbot+60369f4775c014dd1804@syzkaller.appspotmail.com
Fix commit: 6f861765464f fs: Block writes to mounted block devices
First crash: 270d, last: 122d
Cause bisection: failed (error log, bisect log)
  
Fix bisection: fixed by (bisect log) :
commit 6f861765464f43a71462d52026fbddfc858239a5
Author: Jan Kara <jack@suse.cz>
Date: Wed Nov 1 17:43:10 2023 +0000

  fs: Block writes to mounted block devices

  
Discussions (3)
Title Replies (including bot) Last reply
[syzbot] [gfs2?] BUG: sleeping function called from invalid context in gfs2_make_fs_ro 1 (3) 2024/01/17 10:01
[syzbot] Monthly gfs2 report (Sep 2023) 0 (1) 2023/09/04 08:33
[syzbot] Monthly gfs2 report (Aug 2023) 0 (1) 2023/08/02 11:18
Last patch testing requests (1)
Created Duration User Patch Repo Result
2023/08/22 14:12 13m retest repro upstream report log
Fix bisection attempts (4)
Created Duration User Patch Repo Result
2024/01/16 20:21 4h25m bisect fix upstream job log (1)
2023/12/15 22:52 1h48m bisect fix upstream job log (0) log
2023/11/15 11:34 2h35m bisect fix upstream job log (0) log
2023/10/14 00:33 1h50m bisect fix upstream job log (0) log
Cause bisection attempts (2)
Created Duration User Patch Repo Result
2023/07/29 08:02 12h05m bisect upstream error job log (0)
2023/07/21 09:57 12h00m bisect upstream error job log (0)
marked invalid by nogikh@google.com

Sample crash report:
gfs2: fsid=syz:syz.0: found 1 quota changes
syz-executor154: attempt to access beyond end of device
loop0: rw=1, sector=131324, nr_sectors = 4 limit=32768
gfs2: fsid=syz:syz.0: Error 10 writing to journal, jid=0
gfs2: fsid=syz:syz.0: fatal: I/O error(s)
gfs2: fsid=syz:syz.0: about to withdraw this file system
BUG: sleeping function called from invalid context at kernel/sched/completion.c:101
in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5019, name: syz-executor154
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
5 locks held by syz-executor154/5019:
 #0: ffff8880297960e0 (&type->s_umount_key#47){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:360
 #1: ffff88802854cb78 (&sdp->sd_quota_sync_mutex){+.+.}-{3:3}, at: gfs2_quota_sync+0xa1/0x700 fs/gfs2/quota.c:1304
 #2: ffff88802854d060 (&sdp->sd_log_flush_lock){++++}-{3:3}, at: gfs2_log_flush+0x105/0x25f0 fs/gfs2/log.c:1042
 #3: ffff88802854ce88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #3: ffff88802854ce88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_log_lock fs/gfs2/log.h:32 [inline]
 #3: ffff88802854ce88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_flush_revokes+0x53/0x90 fs/gfs2/log.c:814
 #4: ffff88802854d248 (&sdp->sd_freeze_mutex){+.+.}-{3:3}, at: signal_our_withdraw fs/gfs2/util.c:151 [inline]
 #4: ffff88802854d248 (&sdp->sd_freeze_mutex){+.+.}-{3:3}, at: gfs2_withdraw+0x477/0x11e0 fs/gfs2/util.c:334
Preemption disabled at:
[<0000000000000000>] 0x0
CPU: 1 PID: 5019 Comm: syz-executor154 Not tainted 6.5.0-rc2-syzkaller-00066-g46670259519f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 __might_resched+0x5cf/0x780 kernel/sched/core.c:10189
 __wait_for_common kernel/sched/completion.c:101 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x1b/0x60 kernel/sched/completion.c:138
 kthread_stop+0x18e/0x5a0 kernel/kthread.c:710
 gfs2_make_fs_ro+0x183/0x680 fs/gfs2/super.c:555
 signal_our_withdraw fs/gfs2/util.c:153 [inline]
 gfs2_withdraw+0x48a/0x11e0 fs/gfs2/util.c:334
 gfs2_ail1_empty+0x7d0/0x860 fs/gfs2/log.c:377
 gfs2_flush_revokes+0x5e/0x90 fs/gfs2/log.c:815
 revoke_lo_before_commit+0x2c/0x5f0 fs/gfs2/lops.c:868
 lops_before_commit fs/gfs2/lops.h:40 [inline]
 gfs2_log_flush+0xc93/0x25f0 fs/gfs2/log.c:1101
 do_sync+0xa35/0xc80 fs/gfs2/quota.c:977
 gfs2_quota_sync+0x30e/0x700 fs/gfs2/quota.c:1320
 gfs2_sync_fs+0x4d/0xb0 fs/gfs2/super.c:680
 sync_filesystem+0xec/0x220 fs/sync.c:56
 generic_shutdown_super+0x6f/0x340 fs/super.c:472
 kill_block_super+0x68/0xa0 fs/super.c:1417
 deactivate_locked_super+0xa4/0x110 fs/super.c:330
 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254
 task_work_run+0x24a/0x300 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0x68f/0x2290 kernel/exit.c:874
 do_group_exit+0x206/0x2c0 kernel/exit.c:1024
 __do_sys_exit_group kernel/exit.c:1035 [inline]
 __se_sys_exit_group kernel/exit.c:1033 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fca0c3e4749
Code: Unable to access opcode bytes at 0x7fca0c3e471f.
RSP: 002b:00007ffdd6ff7a08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fca0c3e4749
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 00007fca0c47f2b0 R08: ffffffffffffffb8 R09: 000000000001f6db
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fca0c47f2b0
R13: 0000000000000000 R14: 00007fca0c480020 R15: 00007fca0c3b2c90
 </TASK>
BUG: scheduling while atomic: syz-executor154/5019/0x00000002
5 locks held by syz-executor154/5019:
 #0: ffff8880297960e0 (&type->s_umount_key#47){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:360
 #1: ffff88802854cb78 (&sdp->sd_quota_sync_mutex){+.+.}-{3:3}, at: gfs2_quota_sync+0xa1/0x700 fs/gfs2/quota.c:1304
 #2: ffff88802854d060 (&sdp->sd_log_flush_lock){++++}-{3:3}, at: gfs2_log_flush+0x105/0x25f0 fs/gfs2/log.c:1042
 #3: ffff88802854ce88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline]
 #3: ffff88802854ce88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_log_lock fs/gfs2/log.h:32 [inline]
 #3: ffff88802854ce88 (&sdp->sd_log_lock){+.+.}-{2:2}, at: gfs2_flush_revokes+0x53/0x90 fs/gfs2/log.c:814
 #4: ffff88802854d248 (&sdp->sd_freeze_mutex){+.+.}-{3:3}, at: signal_our_withdraw fs/gfs2/util.c:151 [inline]
 #4: ffff88802854d248 (&sdp->sd_freeze_mutex){+.+.}-{3:3}, at: gfs2_withdraw+0x477/0x11e0 fs/gfs2/util.c:334
Modules linked in:
Preemption disabled at:
[<0000000000000000>] 0x0

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/21 09:44 upstream 46670259519f 28847498 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root BUG: sleeping function called from invalid context in gfs2_make_fs_ro
* Struck through repros no longer work on HEAD.