Hello, When using Syzkaller to fuzz the latest Linux kernel, the following crash was triggered. HEAD commit: a7904a538933 Linux 5.16-rc6 git tree: upstream console output: https://paste.ubuntu.com/p/c57Y7mpvMj/plain/ kernel config: https://paste.ubuntu.com/p/FDDNHDxtwz/plain/ Sorry, I don't have a reproducer for this crash, hope the symbolized report can help. If you fix this issue, please add the following tag to the commit: Reported-by: Yiru Xu <xyru1999@xxxxxxxxx> INFO: task syz-executor.4:8184 blocked for more than 143 seconds. Not tainted 5.16.0-rc6 #9 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29536 pid: 8184 ppid: 28604 flags:0x00000004 Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] __schedule+0xcd9/0x2530 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385 __mutex_lock_common kernel/locking/mutex.c:680 [inline] __mutex_lock+0xc48/0x1610 kernel/locking/mutex.c:740 blk_trace_ioctl+0xab/0x270 kernel/trace/blktrace.c:725 blkdev_common_ioctl+0x66c/0x1930 block/ioctl.c:529 blkdev_ioctl+0x2ca/0x800 block/ioctl.c:603 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fc154d6689d RSP: 002b:00007fc153695c28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc154e86100 RCX: 00007fc154d6689d RDX: 0000000000000000 RSI: 0000000000001276 RDI: 0000000000000004 RBP: 00007fc154dd300d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd12e481ef R14: 00007fc154e86100 R15: 00007fc153695dc0 </TASK> Showing all locks held in the system: 1 lock held by khungtaskd/39: #0: ffffffff8bb80e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 3 locks held by jbd2/sda-8/3025: 2 locks held by systemd-journal/3047: #0: ffff888104518f88 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff888104518f88 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by systemd-udevd/3063: #0: ffff88810451a378 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff88810451a378 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by systemd-timesyn/3122: #0: ffff88810451a378 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff88810451a378 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by sd-resolve/3125: #0: ffff88810451a378 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff88810451a378 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by in:imklog/6788: #0: ffff888019825550 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff888019825550 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by cron/6320: #0: ffff88810451a378 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff88810451a378 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by agetty/6353: #0: ffff88810bb0b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc900026232e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x8db/0x1250 drivers/tty/n_tty.c:2113 2 locks held by syz-fuzzer/6713: #0: ffff888026de2d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff888026de2d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by syz-fuzzer/6714: #0: ffff888026de2d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff888026de2d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by syz-fuzzer/6715: #0: ffff888026de2d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff888026de2d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by syz-fuzzer/6716: #0: ffff888026de2d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:838 [inline] #0: ffff888026de2d70 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x1537/0x2400 mm/filemap.c:3096 #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #1: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 2 locks held by kworker/u8:4/9919: 3 locks held by kworker/1:14/11580: 5 locks held by kworker/u9:7/28673: 2 locks held by syz-executor.1/4457: #0: ffff8880202da460 (sb_writers#5){.+.+}-{0:0}, at: do_unlinkat+0x17f/0x660 fs/namei.c:4146 #1: ffff88811b4c0de8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:818 [inline] #1: ffff88811b4c0de8 (&type->i_mutex_dir_key#4/1){+.+.}-{3:3}, at: do_unlinkat+0x269/0x660 fs/namei.c:4150 1 lock held by syz-executor.5/5778: #0: ffffffff8c353758 (tomoyo_ss){....}-{0:0}, at: tomoyo_check_open_permission+0xe8/0x370 security/tomoyo/file.c:761 3 locks held by syz-executor.4/8180: #0: ffff88810720bd20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xab/0x270 kernel/trace/blktrace.c:725 #1: ffffffff8bbe0f08 (relay_channels_mutex){+.+.}-{3:3}, at: relay_open kernel/relay.c:518 [inline] #1: ffffffff8bbe0f08 (relay_channels_mutex){+.+.}-{3:3}, at: relay_open+0x389/0x9d0 kernel/relay.c:477 #2: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __perform_reclaim mm/page_alloc.c:4585 [inline] #2: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] #2: ffffffff8bca5140 (fs_reclaim){+.+.}-{0:0}, at: __alloc_pages_slowpath.constprop.0+0x760/0x21b0 mm/page_alloc.c:5007 1 lock held by syz-executor.4/8184: #0: ffff88810720bd20 (&q->debugfs_mutex){+.+.}-{3:3}, at: blk_trace_ioctl+0xab/0x270 kernel/trace/blktrace.c:725 ============================================= NMI backtrace for cpu 2 CPU: 2 PID: 39 Comm: khungtaskd Not tainted 5.16.0-rc6 #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1a1/0x1e0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xcc8/0x1010 kernel/hung_task.c:295 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> Sending NMI from CPU 2 to CPUs 0-1,3: NMI backtrace for cpu 0 CPU: 0 PID: 28673 Comm: kworker/u9:7 Not tainted 5.16.0-rc6 #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline] RIP: 0010:smp_call_function_many_cond+0x3db/0xc20 kernel/smp.c:969 Code: 0b 00 85 ed 74 4d 48 b8 00 00 00 00 00 fc ff df 4d 89 f4 4c 89 f5 49 c1 ec 03 83 e5 07 49 01 c4 83 c5 03 e8 17 6f 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 a2 06 00 00 8b 43 08 31 RSP: 0018:ffffc90002b47a10 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888063f3fca0 RCX: ffff888040a58000 RDX: 0000000000000000 RSI: ffff888040a58000 RDI: 0000000000000002 RBP: 0000000000000003 R08: ffffffff816bfe59 R09: 0000000000000000 R10: 0000000000000005 R11: fffffbfff1fee128 R12: ffffed100c7e7f95 R13: 0000000000000002 R14: ffff888063f3fca8 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888063e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000043cfec CR3: 000000000b88e000 CR4: 0000000000350ef0 Call Trace: <TASK> on_each_cpu_cond_mask+0x56/0xa0 kernel/smp.c:1135 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1112 [inline] text_poke_bp_batch+0x355/0x560 arch/x86/kernel/alternative.c:1350 text_poke_flush arch/x86/kernel/alternative.c:1451 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 jump_label_update+0x32d/0x440 kernel/jump_label.c:830 static_key_disable_cpuslocked+0x156/0x1c0 kernel/jump_label.c:207 static_key_disable+0x16/0x20 kernel/jump_label.c:215 toggle_allocation_gate mm/kfence/core.c:746 [inline] toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:724 process_one_work+0x9df/0x16d0 kernel/workqueue.c:2298 worker_thread+0x90/0xed0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> NMI backtrace for cpu 3 CPU: 3 PID: 9919 Comm: kworker/u8:4 Not tainted 5.16.0-rc6 #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 Workqueue: bat_events batadv_nc_worker RIP: 0010:__sanitizer_cov_trace_pc+0x15/0x40 kernel/kcov.c:200 Code: 8b 80 58 15 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 65 48 8b 0c 25 40 70 02 00 bf 02 00 00 00 48 89 ce 4c 8b 04 24 <e8> 76 ff ff ff 84 c0 74 20 48 8b 91 48 15 00 00 8b 89 44 15 00 00 RSP: 0018:ffffc90018eefc28 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff88802dd50000 RDX: 0000000000000000 RSI: ffff88802dd50000 RDI: 0000000000000002 RBP: ffffffff88df98b1 R08: ffffffff817d7f4c R09: 0000000000000000 R10: 0000000000000005 R11: ffffed1006758a98 R12: ffff888017e456d8 R13: ffff888017e44c80 R14: dffffc0000000000 R15: ffffffff88df99e0 FS: 0000000000000000(0000) GS:ffff888135d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6177701270 CR3: 000000003157d000 CR4: 0000000000350ee0 Call Trace: <TASK> trace_hardirqs_off+0x2c/0x1b0 kernel/trace/trace_preemptirq.c:79 __local_bh_enable_ip+0xc3/0x110 kernel/softirq.c:365 spin_unlock_bh include/linux/spinlock.h:394 [inline] batadv_nc_purge_paths+0x2d1/0x400 net/batman-adv/network-coding.c:475 batadv_nc_worker+0x287/0x770 net/batman-adv/network-coding.c:726 process_one_work+0x9df/0x16d0 kernel/workqueue.c:2298 worker_thread+0x90/0xed0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> NMI backtrace for cpu 1 CPU: 1 PID: 3025 Comm: jbd2/sda-8 Not tainted 5.16.0-rc6 #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x40 kernel/kcov.c:200 Code: 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 65 48 8b 0c 25 40 70 02 00 bf 02 00 00 00 48 89 ce 4c 8b 04 24 e8 76 ff ff ff 84 c0 <74> 20 48 8b 91 48 15 00 00 8b 89 44 15 00 00 48 8b 02 48 83 c0 01 RSP: 0018:ffffc9000cba68b8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: fffffffffffffffe RCX: ffff88801ed9d640 RDX: 0000000000000000 RSI: ffff88801ed9d640 RDI: 0000000000000002 RBP: ffff888013f46788 R08: ffffffff81a24171 R09: fffffffffffffffe R10: 0000000000000007 R11: fffffbfff1b20a2a R12: 0000000000000004 R13: 0000000000000000 R14: ffffc9000cba6930 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888135c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000477f80 CR3: 00000000218ee000 CR4: 0000000000350ee0 Call Trace: <TASK> list_empty include/linux/list.h:284 [inline] rwsem_is_contended include/linux/rwsem.h:121 [inline] shrink_slab mm/vmscan.c:942 [inline] shrink_slab+0x1a1/0x6f0 mm/vmscan.c:906 shrink_node_memcgs mm/vmscan.c:3131 [inline] shrink_node+0x883/0x1df0 mm/vmscan.c:3252 shrink_zones mm/vmscan.c:3485 [inline] do_try_to_free_pages+0x4f6/0x1440 mm/vmscan.c:3541 try_to_free_pages+0x2a6/0x760 mm/vmscan.c:3776 __perform_reclaim mm/page_alloc.c:4588 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4609 [inline] __alloc_pages_slowpath.constprop.0+0x807/0x21b0 mm/page_alloc.c:5007 __alloc_pages+0x5ab/0x6e0 mm/page_alloc.c:5382 alloc_pages+0x115/0x240 mm/mempolicy.c:2191 __stack_depot_save+0x3db/0x520 lib/stackdepot.c:359 save_stack+0x15e/0x1e0 mm/page_owner.c:120 __set_page_owner+0x45/0x300 mm/page_owner.c:181 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2412 [inline] prep_new_page+0x1a6/0x240 mm/page_alloc.c:2418 get_page_from_freelist+0x1eed/0x3b50 mm/page_alloc.c:4149 __alloc_pages_cpuset_fallback mm/page_alloc.c:4231 [inline] __alloc_pages_may_oom mm/page_alloc.c:4322 [inline] __alloc_pages_slowpath.constprop.0+0x1d34/0x21b0 mm/page_alloc.c:5051 __alloc_pages+0x5ab/0x6e0 mm/page_alloc.c:5382 alloc_pages+0x115/0x240 mm/mempolicy.c:2191 folio_alloc+0x1c/0x70 mm/mempolicy.c:2201 filemap_alloc_folio+0x282/0x3d0 mm/filemap.c:1036 __filemap_get_folio+0x3d7/0x1080 mm/filemap.c:1951 pagecache_get_page+0x2c/0x1a0 mm/folio-compat.c:125 find_or_create_page include/linux/pagemap.h:489 [inline] grow_dev_page fs/buffer.c:949 [inline] grow_buffers fs/buffer.c:1014 [inline] __getblk_slow fs/buffer.c:1041 [inline] __getblk_gfp+0x240/0xb80 fs/buffer.c:1334 __getblk include/linux/buffer_head.h:382 [inline] jbd2_journal_get_descriptor_buffer+0x10a/0x410 fs/jbd2/journal.c:1014 journal_submit_commit_record.part.0+0x89/0xa20 fs/jbd2/commit.c:131 journal_submit_commit_record fs/jbd2/commit.c:128 [inline] jbd2_journal_commit_transaction+0x3ffd/0x6c90 fs/jbd2/commit.c:925 kjournald2+0x1d0/0x930 fs/jbd2/journal.c:213 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK> ---------------- Code disassembly (best guess): 0: 0b 00 or (%rax),%eax 2: 85 ed test %ebp,%ebp 4: 74 4d je 0x53 6: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax d: fc ff df 10: 4d 89 f4 mov %r14,%r12 13: 4c 89 f5 mov %r14,%rbp 16: 49 c1 ec 03 shr $0x3,%r12 1a: 83 e5 07 and $0x7,%ebp 1d: 49 01 c4 add %rax,%r12 20: 83 c5 03 add $0x3,%ebp 23: e8 17 6f 0b 00 callq 0xb6f3f 28: f3 90 pause * 2a: 41 0f b6 04 24 movzbl (%r12),%eax <-- trapping instruction 2f: 40 38 c5 cmp %al,%bpl 32: 7c 08 jl 0x3c 34: 84 c0 test %al,%al 36: 0f 85 a2 06 00 00 jne 0x6de 3c: 8b 43 08 mov 0x8(%rbx),%eax 3f: 31 .byte 0x31 Best Regards, Yiru
