INFO: task syz-executor.3:9080 blocked for more than 143 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:26472 pid: 9080 ppid: 7037 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x19d/0x250 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+0x8e/0x420 fs/xfs/xfs_buf.c:1573 __xfs_buf_submit+0x35b/0x630 fs/xfs/xfs_buf.c:1638 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:885 xfs_readsb+0x2a9/0x550 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x625/0x19b0 fs/xfs/xfs_super.c:1480 get_tree_bdev+0x398/0x680 fs/super.c:1293 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516 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:00007f48ac733188 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: 00007ffc34fd485f R14: 00007f48ac733300 R15: 0000000000022000 INFO: task syz-executor.3:9225 blocked for more than 143 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29184 pid: 9225 ppid: 7037 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 blk_mq_freeze_queue_wait+0xee/0x120 block/blk-mq.c:151 nbd_add_socket+0x150/0x7e0 drivers/block/nbd.c:1055 __nbd_ioctl drivers/block/nbd.c:1410 [inline] nbd_ioctl+0x3aa/0x8f0 drivers/block/nbd.c:1467 blkdev_ioctl+0x24c/0x620 block/ioctl.c:589 block_ioctl+0xda/0x120 block/fops.c:478 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+0x11f/0x190 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: 0033:0x4665e9 RSP: 002b:00007f48ac6f1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffc34fd485f R14: 00007f48ac6f1300 R15: 0000000000022000 INFO: task syz-executor.3:9228 blocked for more than 143 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28904 pid: 9228 ppid: 7037 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107 __down_write_common kernel/locking/rwsem.c:1262 [inline] __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write kernel/locking/rwsem.c:1271 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1518 grab_super+0x50/0x1c0 fs/super.c:389 sget_fc+0x1e3/0x700 fs/super.c:562 get_tree_bdev+0x17d/0x680 fs/super.c:1263 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516 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:00007f48ac6d0188 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: 00007ffc34fd485f R14: 00007f48ac6d0300 R15: 0000000000022000 INFO: task syz-executor.4:9141 blocked for more than 144 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27608 pid: 9141 ppid: 7039 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x19d/0x250 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+0x8e/0x420 fs/xfs/xfs_buf.c:1573 __xfs_buf_submit+0x35b/0x630 fs/xfs/xfs_buf.c:1638 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:885 xfs_readsb+0x2a9/0x550 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x625/0x19b0 fs/xfs/xfs_super.c:1480 get_tree_bdev+0x398/0x680 fs/super.c:1293 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516 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:00007fbcaaeb7188 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: 00007ffda3a1e48f R14: 00007fbcaaeb7300 R15: 0000000000022000 INFO: task syz-executor.4:9235 blocked for more than 144 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29616 pid: 9235 ppid: 7039 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 blk_mq_freeze_queue_wait+0xee/0x120 block/blk-mq.c:151 nbd_add_socket+0x150/0x7e0 drivers/block/nbd.c:1055 __nbd_ioctl drivers/block/nbd.c:1410 [inline] nbd_ioctl+0x3aa/0x8f0 drivers/block/nbd.c:1467 blkdev_ioctl+0x24c/0x620 block/ioctl.c:589 block_ioctl+0xda/0x120 block/fops.c:478 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+0x11f/0x190 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: 0033:0x4665e9 RSP: 002b:00007fbcaae75188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffda3a1e48f R14: 00007fbcaae75300 R15: 0000000000022000 INFO: task syz-executor.4:9236 blocked for more than 144 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:28904 pid: 9236 ppid: 7039 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107 __down_write_common kernel/locking/rwsem.c:1262 [inline] __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write kernel/locking/rwsem.c:1271 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1518 grab_super+0x50/0x1c0 fs/super.c:389 sget_fc+0x1e3/0x700 fs/super.c:562 get_tree_bdev+0x17d/0x680 fs/super.c:1263 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516 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:00007fbcaae54188 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: 00007ffda3a1e48f R14: 00007fbcaae54300 R15: 0000000000022000 INFO: task syz-executor.0:9155 blocked for more than 144 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27128 pid: 9155 ppid: 7035 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x19d/0x250 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+0x8e/0x420 fs/xfs/xfs_buf.c:1573 __xfs_buf_submit+0x35b/0x630 fs/xfs/xfs_buf.c:1638 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:885 xfs_readsb+0x2a9/0x550 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x625/0x19b0 fs/xfs/xfs_super.c:1480 get_tree_bdev+0x398/0x680 fs/super.c:1293 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516 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:00007ff38a335188 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: 00007fff7ef52acf R14: 00007ff38a335300 R15: 0000000000022000 INFO: task syz-executor.0:9239 blocked for more than 145 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:28000 pid: 9239 ppid: 7035 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107 __down_write_common kernel/locking/rwsem.c:1262 [inline] __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write kernel/locking/rwsem.c:1271 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1518 grab_super+0x50/0x1c0 fs/super.c:389 sget_fc+0x1e3/0x700 fs/super.c:562 get_tree_bdev+0x17d/0x680 fs/super.c:1263 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516 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:00007ff38a2d2188 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: 00007fff7ef52acf R14: 00007ff38a2d2300 R15: 0000000000022000 INFO: task syz-executor.5:9163 blocked for more than 145 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27128 pid: 9163 ppid: 7034 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x19d/0x250 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+0x8e/0x420 fs/xfs/xfs_buf.c:1573 __xfs_buf_submit+0x35b/0x630 fs/xfs/xfs_buf.c:1638 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1bd/0x320 fs/xfs/xfs_buf.c:885 xfs_readsb+0x2a9/0x550 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x625/0x19b0 fs/xfs/xfs_super.c:1480 get_tree_bdev+0x398/0x680 fs/super.c:1293 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2988 [inline] path_mount+0x7e8/0x1a40 fs/namespace.c:3318 do_mount fs/namespace.c:3331 [inline] __do_sys_mount fs/namespace.c:3539 [inline] __se_sys_mount fs/namespace.c:3516 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3516 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:00007f7bda3c2188 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: 00007fff3774107f R14: 00007f7bda3c2300 R15: 0000000000022000 INFO: task syz-executor.5:9241 blocked for more than 145 seconds. Not tainted 5.15.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28768 pid: 9241 ppid: 7034 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x90d/0x26c0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 blk_mq_freeze_queue_wait+0xee/0x120 block/blk-mq.c:151 nbd_add_socket+0x150/0x7e0 drivers/block/nbd.c:1055 __nbd_ioctl drivers/block/nbd.c:1410 [inline] nbd_ioctl+0x3aa/0x8f0 drivers/block/nbd.c:1467 blkdev_ioctl+0x24c/0x620 block/ioctl.c:589 block_ioctl+0xda/0x120 block/fops.c:478 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+0x11f/0x190 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: 0033:0x4665e9 RSP: 002b:00007f7bda380188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000000000004 RSI: 000000000000ab00 RDI: 0000000000000003 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007fff3774107f R14: 00007f7bda380300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8ab76880 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6246: #0: ffff888019343770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:990 1 lock held by syz-executor.3/9080: #0: ffff88801848c0e0 (&type->s_umount_key#51/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa00 fs/super.c:229 1 lock held by syz-executor.3/9225: #0: ffff88801a5b1a08 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1460 2 locks held by syz-executor.3/9228: #0: ffff8881404d0648 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1253 #1: ffff88801848c0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389 1 lock held by syz-executor.4/9141: #0: ffff88805f9a40e0 (&type->s_umount_key#51/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa00 fs/super.c:229 1 lock held by syz-executor.4/9235: #0: ffff88801a5dca08 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1460 2 locks held by syz-executor.4/9236: #0: ffff888140493548 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1253 #1: ffff88805f9a40e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389 1 lock held by syz-executor.0/9155: #0: ffff8880187200e0 (&type->s_umount_key#51/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa00 fs/super.c:229 2 locks held by syz-executor.0/9239: #0: ffff888140491dc8 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1253 #1: ffff8880187200e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389 1 lock held by syz-executor.5/9163: #0: ffff8880196420e0 (&type->s_umount_key#51/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa00 fs/super.c:229 1 lock held by syz-executor.5/9241: #0: ffff88801a6d8208 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1460 2 locks held by syz-executor.5/9242: #0: ffff8881404d1208 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1253 #1: ffff8880196420e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389 1 lock held by syz-executor.1/9189: #0: ffff88805f08c0e0 (&type->s_umount_key#51/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa00 fs/super.c:229 1 lock held by syz-executor.1/9244: #0: ffff88801a14b208 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1460 2 locks held by syz-executor.1/9247: #0: ffff888016957008 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1253 #1: ffff88805f08c0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389 1 lock held by syz-executor.2/9191: #0: ffff88805f07a0e0 (&type->s_umount_key#51/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa00 fs/super.c:229 1 lock held by syz-executor.2/9246: #0: ffff88801a45e208 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x120/0x8f0 drivers/block/nbd.c:1460 2 locks held by syz-executor.2/9248: #0: ffff888140492988 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0xdd/0x680 fs/super.c:1253 #1: ffff88805f07a0e0 (&type->s_umount_key#52){+.+.}-{3:3}, at: grab_super+0x50/0x1c0 fs/super.c:389 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-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+0x57/0x7d lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11a/0x160 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+0x88c/0xbf0 kernel/hung_task.c:295 kthread+0x38b/0x460 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: 9063 Comm: kworker/u4:7 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:hlock_class kernel/locking/lockdep.c:194 [inline] RIP: 0010:__lock_acquire+0x13cf/0x5410 kernel/locking/lockdep.c:5011 Code: 8b 1d fd 37 2b 0b 45 85 db 0f 85 9e f3 ff ff e9 a4 c6 d2 06 49 8d 7c 24 f8 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e c1 2d 00 00 41 0f b7 5c 24 f8 RSP: 0018:ffffc9000cbcf7e0 EFLAGS: 00000802 RAX: dffffc0000000000 RBX: 000000001bd76165 RCX: ffffffff8152d0a1 RDX: 1ffff110043e4867 RSI: 0000000000000008 RDI: ffff888021f24338 RBP: ffff888021f24362 R08: 0000000000000000 R09: ffffffff8ede5937 R10: fffffbfff1dbcb26 R11: 000000000000012d R12: ffff888021f24340 R13: ffff888021f23880 R14: 0000000000000000 R15: 51bd761621a0bf11 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7a4640b000 CR3: 000000000a88e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:363 [inline] __get_locked_pte+0x203/0x3c0 mm/memory.c:1736 get_locked_pte include/linux/mm.h:2051 [inline] __text_poke+0x1ab/0x8c0 arch/x86/kernel/alternative.c:817 text_poke_bp_batch+0x2ec/0x560 arch/x86/kernel/alternative.c:1127 text_poke_flush arch/x86/kernel/alternative.c:1268 [inline] text_poke_flush arch/x86/kernel/alternative.c:1265 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1275 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x15f/0x220 kernel/jump_label.c:177 static_key_enable+0x11/0x20 kernel/jump_label.c:190 toggle_allocation_gate mm/kfence/core.c:626 [inline] toggle_allocation_gate+0xe3/0x310 mm/kfence/core.c:618 process_one_work+0x87f/0x1450 kernel/workqueue.c:2297 worker_thread+0x598/0x1040 kernel/workqueue.c:2444 kthread+0x38b/0x460 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 8b 1d fd 37 2b 0b mov 0xb2b37fd(%rip),%ebx # 0xb2b3803 6: 45 85 db test %r11d,%r11d 9: 0f 85 9e f3 ff ff jne 0xfffff3ad f: e9 a4 c6 d2 06 jmpq 0x6d2c6b8 14: 49 8d 7c 24 f8 lea -0x8(%r12),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e c1 2d 00 00 jle 0x2dfb 3a: 41 0f b7 5c 24 f8 movzwl -0x8(%r12),%ebx