INFO: task syz-executor.2:31789 blocked for more than 143 seconds. Not tainted 5.14.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26016 pid:31789 ppid: 18148 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 xfs_buf_iowait+0xd5/0x5f0 fs/xfs/xfs_buf.c:1571 __xfs_buf_submit+0x473/0x7f0 fs/xfs/xfs_buf.c:1636 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x20d/0x380 fs/xfs/xfs_buf.c:884 xfs_readsb+0x318/0x5f0 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x43f/0x1af0 fs/xfs/xfs_super.c:1428 get_tree_bdev+0x440/0x760 fs/super.c:1293 vfs_get_tree+0x89/0x2f0 fs/super.c:1498 do_new_mount fs/namespace.c:2923 [inline] path_mount+0x134a/0x1fc0 fs/namespace.c:3253 do_mount fs/namespace.c:3266 [inline] __do_sys_mount fs/namespace.c:3474 [inline] __se_sys_mount fs/namespace.c:3451 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3451 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: 0033:0x4665e9 RSP: 002b:00007f7299204188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffec3d9263f R14: 00007f7299204300 R15: 0000000000022000 INFO: task syz-executor.2:31829 blocked for more than 143 seconds. Not tainted 5.14.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:28384 pid:31829 ppid: 18148 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0x93a/0x26f0 kernel/sched/core.c:5938 schedule+0xd3/0x270 kernel/sched/core.c:6017 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1407 grab_super+0x59/0x260 fs/super.c:389 sget_fc+0x24c/0x7c0 fs/super.c:562 get_tree_bdev+0x1bb/0x760 fs/super.c:1263 vfs_get_tree+0x89/0x2f0 fs/super.c:1498 do_new_mount fs/namespace.c:2923 [inline] path_mount+0x134a/0x1fc0 fs/namespace.c:3253 do_mount fs/namespace.c:3266 [inline] __do_sys_mount fs/namespace.c:3474 [inline] __se_sys_mount fs/namespace.c:3451 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3451 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: 0033:0x4665e9 RSP: 002b:00007f72991a1188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056c1a8 R13: 00007ffec3d9263f R14: 00007f72991a1300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1643: #0: ffffffff8b979840 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/8381: #0: ffff8880247231b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 2 locks held by agetty/20638: #0: ffff888039667098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc9000f22b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 2 locks held by kworker/u4:7/22112: #0: ffff8880b9d51c18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1e/0x30 kernel/sched/core.c:460 #1: ffff8880b9d1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x16a/0x480 kernel/sched/psi.c:871 1 lock held by syz-executor.3/25721: #0: ffff8881482c4460 (sb_writers#5){.+.+}-{0:0}, at: __do_splice+0x134/0x250 fs/splice.c:1144 1 lock held by syz-executor.3/25785: #0: ffff8881482c4460 (sb_writers#5){.+.+}-{0:0}, at: __do_splice+0x134/0x250 fs/splice.c:1144 1 lock held by syz-executor.3/25812: #0: ffff8881482c4460 (sb_writers#5){.+.+}-{0:0}, at: __do_splice+0x134/0x250 fs/splice.c:1144 1 lock held by syz-executor.2/31789: #0: ffff88808b8fe0e0 (&type->s_umount_key#107/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xab0 fs/super.c:229 2 locks held by syz-executor.2/31829: #0: ffff88801aef9858 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0x10a/0x760 fs/super.c:1253 #1: ffff88808b8fe0e0 (&type->s_umount_key#108){+.+.}-{3:3}, at: grab_super+0x59/0x260 fs/super.c:389 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1643 Comm: khungtaskd Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xd0a/0xfc0 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4858 Comm: systemd-journal Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x829/0x1ce0 arch/x86/kernel/unwind_orc.c:466 Code: 83 e0 07 40 38 c6 40 0f 9e c7 40 84 f6 0f 95 c0 40 84 c7 0f 85 bc 0f 00 00 49 0f bf 30 48 01 d6 48 89 74 24 60 e9 d8 fd ff ff <48> b8 00 00 00 00 00 fc ff df 48 8b 54 24 08 48 c1 ea 03 80 3c 02 RSP: 0018:ffffc9000ac77700 EFLAGS: 00000097 RAX: 0000000000000005 RBX: 1ffff9200158eee8 RCX: ffffffff8df15bd1 RDX: 0000000000000005 RSI: 0000000000000001 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff8df15bcc R09: ffffffff8df15bcc R10: fffff5200158ef06 R11: 0000000000086088 R12: ffffc9000ac77820 R13: ffffc9000ac7780d R14: ffffc9000ac777d8 R15: ffffffff8df15bd0 FS: 00007f8dab0048c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8da87e4000 CR3: 00000000171a5000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0x7d/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 save_stack+0x151/0x1e0 mm/page_owner.c:119 __set_page_owner+0x50/0x290 mm/page_owner.c:181 prep_new_page mm/page_alloc.c:2436 [inline] get_page_from_freelist+0xa72/0x2f80 mm/page_alloc.c:4168 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5390 __alloc_pages_node include/linux/gfp.h:570 [inline] kmem_getpages mm/slab.c:1377 [inline] cache_grow_begin+0x75/0x460 mm/slab.c:2593 cache_alloc_refill+0x27f/0x380 mm/slab.c:2965 ____cache_alloc mm/slab.c:3048 [inline] ____cache_alloc mm/slab.c:3031 [inline] __do_cache_alloc mm/slab.c:3275 [inline] slab_alloc mm/slab.c:3316 [inline] kmem_cache_alloc+0x454/0x540 mm/slab.c:3507 getname_flags.part.0+0x50/0x4f0 fs/namei.c:138 getname_flags+0x9a/0xe0 include/linux/audit.h:319 getname fs/namei.c:209 [inline] user_path_create fs/namei.c:3660 [inline] do_mkdirat+0x8d/0x310 fs/namei.c:3838 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: 0033:0x7f8daa2bf687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffcc9a36378 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffcc9a393e0 RCX: 00007f8daa2bf687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 0000560a8c1638c0 RBP: 00007ffcc9a363b0 R08: 0000560a8a8bc3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000560a8c1638c0 R15: 00007ffcc9a369f0 ---------------- Code disassembly (best guess): 0: 83 e0 07 and $0x7,%eax 3: 40 38 c6 cmp %al,%sil 6: 40 0f 9e c7 setle %dil a: 40 84 f6 test %sil,%sil d: 0f 95 c0 setne %al 10: 40 84 c7 test %al,%dil 13: 0f 85 bc 0f 00 00 jne 0xfd5 19: 49 0f bf 30 movswq (%r8),%rsi 1d: 48 01 d6 add %rdx,%rsi 20: 48 89 74 24 60 mov %rsi,0x60(%rsp) 25: e9 d8 fd ff ff jmpq 0xfffffe02 * 2a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax <-- trapping instruction 31: fc ff df 34: 48 8b 54 24 08 mov 0x8(%rsp),%rdx 39: 48 c1 ea 03 shr $0x3,%rdx 3d: 80 .byte 0x80 3e: 3c 02 cmp $0x2,%al