#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git bugfix/syzbot
On 5/21/25 14:35, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 3c21441eeffc Merge tag 'acpi-6.15-rc7' of git://git.kernel.. > git tree: upstream > console+strace: https://syzkaller.appspot.com/x/log.txt?x=176b22d4580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=ea35e429f965296e > dashboard link: https://syzkaller.appspot.com/bug?extid=aa5bb5f6860e08a60450 > compiler: Debian clang version 20.1.2 > (++20250402124445+58df0ef89dd6-1~exp1~20250402004600.97), Debian LLD 20.1.2 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=167d2ef4580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13a81f68580000 > > Downloadable assets: > disk image: > https://storage.googleapis.com/syzbot-assets/57d40aff8cb0/disk-3c21441e.raw.xz > vmlinux: > https://storage.googleapis.com/syzbot-assets/9f367fd8bfd5/vmlinux-3c21441e.xz > kernel image: > https://storage.googleapis.com/syzbot-assets/4e70f31a61dc/bzImage-3c21441e.xz > mounted in repro: > https://storage.googleapis.com/syzbot-assets/9e197e7beb8c/mount_0.gz > fsck result: failed (log: > https://syzkaller.appspot.com/x/fsck.log?x=11108ef4580000) > > The issue was bisected to: > > commit 84b5bb8bf0f6a78c232a20c2eecdbb8112ac2703 > Author: Qi Han <ha...@vivo.com> > Date: Fri Oct 25 09:18:23 2024 +0000 > > f2fs: modify f2fs_is_checkpoint_ready logic to allow more data to be > written with the CP disable > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10f45ef4580000 > final oops: https://syzkaller.appspot.com/x/report.txt?x=12f45ef4580000 > console output: https://syzkaller.appspot.com/x/log.txt?x=14f45ef4580000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+aa5bb5f6860e08a60...@syzkaller.appspotmail.com > Fixes: 84b5bb8bf0f6 ("f2fs: modify f2fs_is_checkpoint_ready logic to allow > more data to be written with the CP disable") > > INFO: task syz-executor328:5836 blocked for more than 143 seconds. > Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor328 state:D stack:23432 pid:5836 tgid:5832 ppid:5826 > task_flags:0x400140 flags:0x00004006 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5382 [inline] > __schedule+0x168f/0x4c70 kernel/sched/core.c:6767 > __schedule_loop kernel/sched/core.c:6845 [inline] > schedule+0x165/0x360 kernel/sched/core.c:6860 > percpu_down_write+0x28e/0x330 kernel/locking/percpu-rwsem.c:253 > sb_wait_write fs/super.c:1855 [inline] > freeze_super+0x4c2/0xeb0 fs/super.c:2044 > fs_bdev_freeze+0x19f/0x310 fs/super.c:1484 > bdev_freeze+0xd8/0x220 block/bdev.c:298 > f2fs_do_shutdown+0x23d/0x5c0 fs/f2fs/file.c:2367 > f2fs_ioc_shutdown fs/f2fs/file.c:2459 [inline] > __f2fs_ioctl+0x3de9/0xae80 fs/f2fs/file.c:4558 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:906 [inline] > __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f836b5ab109 > RSP: 002b:00007f836b55f218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007f836b6386c8 RCX: 00007f836b5ab109 > RDX: 0000200000000080 RSI: 000000008004587d RDI: 0000000000000005 > RBP: 00007f836b6386c0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f836b604668 > R13: 00002000000000c0 R14: 0000200000000180 R15: 00002000000000e0 > </TASK> > INFO: task syz-executor328:5856 blocked for more than 144 seconds. > Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor328 state:D stack:24392 pid:5856 tgid:5832 ppid:5826 > task_flags:0x400040 flags:0x00004006 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5382 [inline] > __schedule+0x168f/0x4c70 kernel/sched/core.c:6767 > __schedule_loop kernel/sched/core.c:6845 [inline] > schedule+0x165/0x360 kernel/sched/core.c:6860 > io_schedule+0x81/0xe0 kernel/sched/core.c:7742 > f2fs_balance_fs+0x4b4/0x780 fs/f2fs/segment.c:444 > f2fs_map_blocks+0x3af1/0x43b0 fs/f2fs/data.c:1791 > f2fs_expand_inode_data+0x653/0xaf0 fs/f2fs/file.c:1872 > f2fs_fallocate+0x4f5/0x990 fs/f2fs/file.c:1975 > vfs_fallocate+0x6a0/0x830 fs/open.c:338 > ioctl_preallocate fs/ioctl.c:290 [inline] > file_ioctl fs/ioctl.c:-1 [inline] > do_vfs_ioctl+0x1b8f/0x1eb0 fs/ioctl.c:885 > __do_sys_ioctl fs/ioctl.c:904 [inline] > __se_sys_ioctl+0x82/0x170 fs/ioctl.c:892 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f836b5ab109 > RSP: 002b:00007f836b53e218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007f836b6386d8 RCX: 00007f836b5ab109 > RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000004 > RBP: 00007f836b6386d0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f836b604668 > R13: 00002000000000c0 R14: 0000200000000180 R15: 00002000000000e0 > </TASK> > INFO: task syz-executor328:5894 blocked for more than 145 seconds. > Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor328 state:D stack:24152 pid:5894 tgid:5892 ppid:5825 > task_flags:0x400140 flags:0x00004006 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5382 [inline] > __schedule+0x168f/0x4c70 kernel/sched/core.c:6767 > __schedule_loop kernel/sched/core.c:6845 [inline] > schedule+0x165/0x360 kernel/sched/core.c:6860 > percpu_down_write+0x28e/0x330 kernel/locking/percpu-rwsem.c:253 > sb_wait_write fs/super.c:1855 [inline] > freeze_super+0x4c2/0xeb0 fs/super.c:2044 > fs_bdev_freeze+0x19f/0x310 fs/super.c:1484 > bdev_freeze+0xd8/0x220 block/bdev.c:298 > f2fs_do_shutdown+0x23d/0x5c0 fs/f2fs/file.c:2367 > f2fs_ioc_shutdown fs/f2fs/file.c:2459 [inline] > __f2fs_ioctl+0x3de9/0xae80 fs/f2fs/file.c:4558 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:906 [inline] > __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f836b5ab109 > RSP: 002b:00007f836b55f218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007f836b6386c8 RCX: 00007f836b5ab109 > RDX: 0000200000000080 RSI: 000000008004587d RDI: 0000000000000005 > RBP: 00007f836b6386c0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f836b604668 > R13: 00002000000000c0 R14: 0000200000000180 R15: 00002000000000e0 > </TASK> > INFO: task syz-executor328:5907 blocked for more than 145 seconds. > Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor328 state:D stack:25432 pid:5907 tgid:5892 ppid:5825 > task_flags:0x400040 flags:0x00004006 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5382 [inline] > __schedule+0x168f/0x4c70 kernel/sched/core.c:6767 > __schedule_loop kernel/sched/core.c:6845 [inline] > schedule+0x165/0x360 kernel/sched/core.c:6860 > io_schedule+0x81/0xe0 kernel/sched/core.c:7742 > f2fs_balance_fs+0x4b4/0x780 fs/f2fs/segment.c:444 > f2fs_map_blocks+0x3af1/0x43b0 fs/f2fs/data.c:1791 > f2fs_expand_inode_data+0x653/0xaf0 fs/f2fs/file.c:1872 > f2fs_fallocate+0x4f5/0x990 fs/f2fs/file.c:1975 > vfs_fallocate+0x6a0/0x830 fs/open.c:338 > ioctl_preallocate fs/ioctl.c:290 [inline] > file_ioctl fs/ioctl.c:-1 [inline] > do_vfs_ioctl+0x1b8f/0x1eb0 fs/ioctl.c:885 > __do_sys_ioctl fs/ioctl.c:904 [inline] > __se_sys_ioctl+0x82/0x170 fs/ioctl.c:892 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f836b5ab109 > RSP: 002b:00007f836b53e218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007f836b6386d8 RCX: 00007f836b5ab109 > RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000004 > RBP: 00007f836b6386d0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f836b604668 > R13: 00002000000000c0 R14: 0000200000000180 R15: 00002000000000e0 > </TASK> > INFO: task syz-executor328:5896 blocked for more than 147 seconds. > Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor328 state:D stack:25144 pid:5896 tgid:5893 ppid:5827 > task_flags:0x400140 flags:0x00004006 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5382 [inline] > __schedule+0x168f/0x4c70 kernel/sched/core.c:6767 > __schedule_loop kernel/sched/core.c:6845 [inline] > schedule+0x165/0x360 kernel/sched/core.c:6860 > percpu_down_write+0x28e/0x330 kernel/locking/percpu-rwsem.c:253 > sb_wait_write fs/super.c:1855 [inline] > freeze_super+0x4c2/0xeb0 fs/super.c:2044 > fs_bdev_freeze+0x19f/0x310 fs/super.c:1484 > bdev_freeze+0xd8/0x220 block/bdev.c:298 > f2fs_do_shutdown+0x23d/0x5c0 fs/f2fs/file.c:2367 > f2fs_ioc_shutdown fs/f2fs/file.c:2459 [inline] > __f2fs_ioctl+0x3de9/0xae80 fs/f2fs/file.c:4558 > vfs_ioctl fs/ioctl.c:51 [inline] > __do_sys_ioctl fs/ioctl.c:906 [inline] > __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f836b5ab109 > RSP: 002b:00007f836b55f218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007f836b6386c8 RCX: 00007f836b5ab109 > RDX: 0000200000000080 RSI: 000000008004587d RDI: 0000000000000005 > RBP: 00007f836b6386c0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f836b604668 > R13: 00002000000000c0 R14: 0000200000000180 R15: 00002000000000e0 > </TASK> > INFO: task syz-executor328:5908 blocked for more than 147 seconds. > Not tainted 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > task:syz-executor328 state:D stack:24984 pid:5908 tgid:5893 ppid:5827 > task_flags:0x400040 flags:0x00004006 > Call Trace: > <TASK> > context_switch kernel/sched/core.c:5382 [inline] > __schedule+0x168f/0x4c70 kernel/sched/core.c:6767 > __schedule_loop kernel/sched/core.c:6845 [inline] > schedule+0x165/0x360 kernel/sched/core.c:6860 > io_schedule+0x81/0xe0 kernel/sched/core.c:7742 > f2fs_balance_fs+0x4b4/0x780 fs/f2fs/segment.c:444 > f2fs_map_blocks+0x3af1/0x43b0 fs/f2fs/data.c:1791 > f2fs_expand_inode_data+0x653/0xaf0 fs/f2fs/file.c:1872 > f2fs_fallocate+0x4f5/0x990 fs/f2fs/file.c:1975 > vfs_fallocate+0x6a0/0x830 fs/open.c:338 > ioctl_preallocate fs/ioctl.c:290 [inline] > file_ioctl fs/ioctl.c:-1 [inline] > do_vfs_ioctl+0x1b8f/0x1eb0 fs/ioctl.c:885 > __do_sys_ioctl fs/ioctl.c:904 [inline] > __se_sys_ioctl+0x82/0x170 fs/ioctl.c:892 > do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] > do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7f836b5ab109 > RSP: 002b:00007f836b53e218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007f836b6386d8 RCX: 00007f836b5ab109 > RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000004 > RBP: 00007f836b6386d0 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00007f836b604668 > R13: 00002000000000c0 R14: 0000200000000180 R15: 00002000000000e0 > </TASK> > > Showing all locks held in the system: > 3 locks held by kworker/u8:1/13: > #0: ffff888143ad3148 ((wq_completion)writeback){+.+.}-{0:0}, at: > process_one_work kernel/workqueue.c:3213 [inline] > #0: ffff888143ad3148 ((wq_completion)writeback){+.+.}-{0:0}, at: > process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319 > #1: ffffc90000127c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, > at: process_one_work kernel/workqueue.c:3214 [inline] > #1: ffffc90000127c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, > at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319 > #2: ffff888079b0a0e0 (&type->s_umount_key#43){++++}-{4:4}, at: > super_trylock_shared+0x20/0xf0 fs/super.c:562 > 1 lock held by khungtaskd/31: > #0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire > include/linux/rcupdate.h:331 [inline] > #0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock > include/linux/rcupdate.h:841 [inline] > #0: ffffffff8df3dce0 (rcu_read_lock){....}-{1:3}, at: > debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6764 > 5 locks held by kworker/u8:2/36: > 3 locks held by kworker/u8:3/53: > #0: ffff888143ad3148 ((wq_completion)writeback){+.+.}-{0:0}, at: > process_one_work kernel/workqueue.c:3213 [inline] > #0: ffff888143ad3148 ((wq_completion)writeback){+.+.}-{0:0}, at: > process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319 > #1: ffffc90000be7c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, > at: process_one_work kernel/workqueue.c:3214 [inline] > #1: ffffc90000be7c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, > at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319 > #2: ffff8880240c40e0 (&type->s_umount_key#43){++++}-{4:4}, at: > super_trylock_shared+0x20/0xf0 fs/super.c:562 > 3 locks held by kworker/u8:5/969: > #0: ffff888143ad3148 ((wq_completion)writeback){+.+.}-{0:0}, at: > process_one_work kernel/workqueue.c:3213 [inline] > #0: ffff888143ad3148 ((wq_completion)writeback){+.+.}-{0:0}, at: > process_scheduled_works+0x9b1/0x17a0 kernel/workqueue.c:3319 > #1: ffffc90003787c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, > at: process_one_work kernel/workqueue.c:3214 [inline] > #1: ffffc90003787c60 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, > at: process_scheduled_works+0x9ec/0x17a0 kernel/workqueue.c:3319 > #2: ffff8880230a20e0 (&type->s_umount_key#43){++++}-{4:4}, at: > super_trylock_shared+0x20/0xf0 fs/super.c:562 > 2 locks held by getty/5576: > #0: ffff888030c370a0 (&tty->ldisc_sem){++++}-{0:0}, at: > tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 > #1: ffffc900036e32f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: > n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 > 2 locks held by syz-executor328/5836: > #0: ffff888022856930 (&bdev->bd_fsfreeze_mutex){+.+.}-{4:4}, at: > bdev_freeze+0x2a/0x220 block/bdev.c:289 > #1: ffff8880230a2420 (sb_writers#9){++++}-{0:0}, at: sb_wait_write > fs/super.c:1855 [inline] > #1: ffff8880230a2420 (sb_writers#9){++++}-{0:0}, at: > freeze_super+0x4c2/0xeb0 fs/super.c:2044 > 3 locks held by syz-executor328/5856: > #0: ffff8880230a2420 (sb_writers#9){++++}-{0:0}, at: file_start_write > include/linux/fs.h:3041 [inline] > #0: ffff8880230a2420 (sb_writers#9){++++}-{0:0}, at: > vfs_fallocate+0x62a/0x830 fs/open.c:337 > #1: ffff888078bcbfd8 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > inode_lock include/linux/fs.h:867 [inline] > #1: ffff888078bcbfd8 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > f2fs_fallocate+0x24e/0x990 fs/f2fs/file.c:1940 > #2: ffff888033c5d4f8 (&sbi->pin_sem){+.+.}-{4:4}, at: f2fs_down_write > fs/f2fs/f2fs.h:2213 [inline] > #2: ffff888033c5d4f8 (&sbi->pin_sem){+.+.}-{4:4}, at: > f2fs_expand_inode_data+0x430/0xaf0 fs/f2fs/file.c:1839 > 2 locks held by syz-executor328/5894: > #0: ffff888022855db0 (&bdev->bd_fsfreeze_mutex){+.+.}-{4:4}, at: > bdev_freeze+0x2a/0x220 block/bdev.c:289 > #1: ffff888079b0a420 (sb_writers#9){++++}-{0:0}, at: sb_wait_write > fs/super.c:1855 [inline] > #1: ffff888079b0a420 (sb_writers#9){++++}-{0:0}, at: > freeze_super+0x4c2/0xeb0 fs/super.c:2044 > 3 locks held by syz-executor328/5907: > #0: ffff888079b0a420 (sb_writers#9){++++}-{0:0}, at: file_start_write > include/linux/fs.h:3041 [inline] > #0: ffff888079b0a420 (sb_writers#9){++++}-{0:0}, at: > vfs_fallocate+0x62a/0x830 fs/open.c:337 > #1: ffff888074156398 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > inode_lock include/linux/fs.h:867 [inline] > #1: ffff888074156398 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > f2fs_fallocate+0x24e/0x990 fs/f2fs/file.c:1940 > #2: ffff888079f554f8 (&sbi->pin_sem){+.+.}-{4:4}, at: f2fs_down_write > fs/f2fs/f2fs.h:2213 [inline] > #2: ffff888079f554f8 (&sbi->pin_sem){+.+.}-{4:4}, at: > f2fs_expand_inode_data+0x430/0xaf0 fs/f2fs/file.c:1839 > 2 locks held by syz-executor328/5896: > #0: ffff8880228574b0 (&bdev->bd_fsfreeze_mutex){+.+.}-{4:4}, at: > bdev_freeze+0x2a/0x220 block/bdev.c:289 > #1: ffff8880240c4420 (sb_writers#9){++++}-{0:0}, at: sb_wait_write > fs/super.c:1855 [inline] > #1: ffff8880240c4420 (sb_writers#9){++++}-{0:0}, at: > freeze_super+0x4c2/0xeb0 fs/super.c:2044 > 3 locks held by syz-executor328/5908: > #0: ffff8880240c4420 (sb_writers#9){++++}-{0:0}, at: file_start_write > include/linux/fs.h:3041 [inline] > #0: ffff8880240c4420 (sb_writers#9){++++}-{0:0}, at: > vfs_fallocate+0x62a/0x830 fs/open.c:337 > #1: ffff888074157578 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > inode_lock include/linux/fs.h:867 [inline] > #1: ffff888074157578 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > f2fs_fallocate+0x24e/0x990 fs/f2fs/file.c:1940 > #2: ffff88807f9ad4f8 (&sbi->pin_sem){+.+.}-{4:4}, at: f2fs_down_write > fs/f2fs/f2fs.h:2213 [inline] > #2: ffff88807f9ad4f8 (&sbi->pin_sem){+.+.}-{4:4}, at: > f2fs_expand_inode_data+0x430/0xaf0 fs/f2fs/file.c:1839 > 2 locks held by syz-executor328/6364: > #0: ffff8880228546b0 (&bdev->bd_fsfreeze_mutex){+.+.}-{4:4}, at: > bdev_freeze+0x2a/0x220 block/bdev.c:289 > #1: ffff88807dedc420 (sb_writers#9){++++}-{0:0}, at: sb_wait_write > fs/super.c:1855 [inline] > #1: ffff88807dedc420 (sb_writers#9){++++}-{0:0}, at: > freeze_super+0x4c2/0xeb0 fs/super.c:2044 > 3 locks held by syz-executor328/6374: > #0: ffff88807dedc420 (sb_writers#9){++++}-{0:0}, at: file_start_write > include/linux/fs.h:3041 [inline] > #0: ffff88807dedc420 (sb_writers#9){++++}-{0:0}, at: > vfs_fallocate+0x62a/0x830 fs/open.c:337 > #1: ffff88806d35a508 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > inode_lock include/linux/fs.h:867 [inline] > #1: ffff88806d35a508 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > f2fs_fallocate+0x24e/0x990 fs/f2fs/file.c:1940 > #2: ffff888079e4d4f8 (&sbi->pin_sem){+.+.}-{4:4}, at: f2fs_down_write > fs/f2fs/f2fs.h:2213 [inline] > #2: ffff888079e4d4f8 (&sbi->pin_sem){+.+.}-{4:4}, at: > f2fs_expand_inode_data+0x430/0xaf0 fs/f2fs/file.c:1839 > 2 locks held by syz-executor328/6379: > #0: ffff888022855230 (&bdev->bd_fsfreeze_mutex){+.+.}-{4:4}, at: > bdev_freeze+0x2a/0x220 block/bdev.c:289 > #1: ffff888033604420 (sb_writers#9){++++}-{0:0}, at: sb_wait_write > fs/super.c:1855 [inline] > #1: ffff888033604420 (sb_writers#9){++++}-{0:0}, at: > freeze_super+0x4c2/0xeb0 fs/super.c:2044 > 3 locks held by syz-executor328/6382: > #0: ffff888033604420 (sb_writers#9){++++}-{0:0}, at: file_start_write > include/linux/fs.h:3041 [inline] > #0: ffff888033604420 (sb_writers#9){++++}-{0:0}, at: > vfs_fallocate+0x62a/0x830 fs/open.c:337 > #1: ffff88806d037578 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > inode_lock include/linux/fs.h:867 [inline] > #1: ffff88806d037578 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: > f2fs_fallocate+0x24e/0x990 fs/f2fs/file.c:1940 > #2: ffff8880286b14f8 (&sbi->pin_sem){+.+.}-{4:4}, at: f2fs_down_write > fs/f2fs/f2fs.h:2213 [inline] > #2: ffff8880286b14f8 (&sbi->pin_sem){+.+.}-{4:4}, at: > f2fs_expand_inode_data+0x430/0xaf0 fs/f2fs/file.c:1839 > > ============================================= > > NMI backtrace for cpu 0 > CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted > 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 PREEMPT(full) > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 05/07/2025 > Call Trace: > <TASK> > dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 > nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 > nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 > trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline] > check_hung_uninterruptible_tasks kernel/hung_task.c:274 [inline] > watchdog+0xfee/0x1030 kernel/hung_task.c:437 > kthread+0x70e/0x8a0 kernel/kthread.c:464 > ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > </TASK> > Sending NMI from CPU 0 to CPUs 1: > NMI backtrace for cpu 1 > CPU: 1 UID: 0 PID: 5905 Comm: f2fs_gc-7:4 Not tainted > 6.15.0-rc6-syzkaller-00208-g3c21441eeffc #0 PREEMPT(full) > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 05/07/2025 > RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:210 > Code: 89 fb e8 23 00 00 00 48 8b 3d 5c c3 d5 0b 48 89 de 5b e9 33 41 55 00 cc > cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 > 24 65 48 8b 0c 25 08 70 72 92 65 8b 15 18 7f > RSP: 0018:ffffc90004697b90 EFLAGS: 00000206 > RAX: ffffffff818dcd2c RBX: ffff88802fa49e00 RCX: 0000000000000000 > RDX: ffff88802fa49e00 RSI: 0000000000200000 RDI: 0000000000000000 > RBP: 0000000000200000 R08: ffff88803342a007 R09: 1ffff11006685400 > R10: dffffc0000000000 R11: ffffed1006685401 R12: ffff88807f9ac000 > R13: dffffc0000000000 R14: ffff88802fa49e2c R15: dffffc0000000000 > FS: 0000000000000000(0000) GS:ffff8881261f9000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f836b5fec18 CR3: 000000000dd38000 CR4: 00000000003526f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > <TASK> > to_kthread kernel/kthread.c:84 [inline] > kthread_should_stop+0x59/0xf0 kernel/kthread.c:169 > gc_thread_func+0x344/0x2b30 fs/f2fs/gc.c:49 > kthread+0x70e/0x8a0 kernel/kthread.c:464 > ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > </TASK> > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkal...@googlegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
