INFO: task syz.3.42:6097 blocked for more than 143 seconds. Not tainted 6.16.0-rc3-next-20250627-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.42 state:D stack:25096 pid:6097 tgid:6097 ppid:5830 task_flags:0x440040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5313 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6696 __schedule_loop kernel/sched/core.c:6774 [inline] schedule+0x165/0x360 kernel/sched/core.c:6789 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6846 rwsem_down_read_slowpath+0x552/0x880 kernel/locking/rwsem.c:1084 __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x98/0x2e0 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 do_sync_mmap_readahead+0x25e/0x7a0 mm/filemap.c:-1 filemap_fault+0x62c/0x1200 mm/filemap.c:3445 __do_fault+0x135/0x390 mm/memory.c:5165 do_shared_fault mm/memory.c:5650 [inline] do_fault mm/memory.c:5724 [inline] do_pte_missing mm/memory.c:4247 [inline] handle_pte_fault mm/memory.c:6065 [inline] __handle_mm_fault+0x1847/0x5440 mm/memory.c:6208 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6377 do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f7e1ac64f59 RSP: 002b:00007fff77d38a60 EFLAGS: 00010246 RAX: 0000200000000940 RBX: 0000000000000002 RCX: ffffe00000000000 RDX: 26968a9778b7ef62 RSI: 0000000000000000 RDI: 0000555591f433c8 RBP: 00007f7e1afb7ba0 R08: 00007f7e1ac00000 R09: 000000000000000f R10: 0000000000000001 R11: 0000000000000006 R12: 00007f7e1afb616c R13: 00007f7e1afb6160 R14: fffffffffffffffe R15: 00007fff77d38b70 INFO: task syz.3.42:6098 blocked for more than 144 seconds. Not tainted 6.16.0-rc3-next-20250627-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.3.42 state:D stack:25000 pid:6098 tgid:6097 ppid:5830 task_flags:0x440040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5313 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6696 __schedule_loop kernel/sched/core.c:6774 [inline] schedule+0x165/0x360 kernel/sched/core.c:6789 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6846 rwsem_down_read_slowpath+0x552/0x880 kernel/locking/rwsem.c:1084 __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x98/0x2e0 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 do_sync_mmap_readahead+0x25e/0x7a0 mm/filemap.c:-1 filemap_fault+0x62c/0x1200 mm/filemap.c:3445 __do_fault+0x135/0x390 mm/memory.c:5165 do_shared_fault mm/memory.c:5650 [inline] do_fault mm/memory.c:5724 [inline] do_pte_missing mm/memory.c:4247 [inline] handle_pte_fault mm/memory.c:6065 [inline] __handle_mm_fault+0x1847/0x5440 mm/memory.c:6208 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6377 do_user_addr_fault+0x764/0x1390 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: ff 03 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc900050ef7f8 EFLAGS: 00050206 RAX: ffffffff84cb4501 RBX: ffff888059be0000 RCX: 0000000000000100 RDX: 0000000000000000 RSI: ffff888059be0f00 RDI: 00002000002e1000 RBP: ffffc900050ef948 R08: ffff888059be0fff R09: 1ffff1100b37c1ff R10: dffffc0000000000 R11: ffffed100b37c200 R12: 1ffff92000a1dfaf R13: 00002000002e0100 R14: ffffc900050efd88 R15: 0000000000001000 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:147 [inline] copy_to_user_iter lib/iov_iter.c:25 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x24c/0x16f0 lib/iov_iter.c:185 copy_page_to_iter+0x10c/0x1c0 lib/iov_iter.c:362 copy_folio_to_iter include/linux/uio.h:204 [inline] filemap_read+0x7c0/0x11a0 mm/filemap.c:2763 blkdev_read_iter+0x30a/0x440 block/fops.c:833 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x4d0/0x980 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7e1ad8e929 RSP: 002b:00007f7e1bc70038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f7e1afb5fa0 RCX: 00007f7e1ad8e929 RDX: 00000000fffffe5a RSI: 0000200000000100 RDI: 0000000000000005 RBP: 00007f7e1ae10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7e1afb5fa0 R15: 00007fff77d388f8 INFO: task syz.1.50:6121 blocked for more than 145 seconds. Not tainted 6.16.0-rc3-next-20250627-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.50 state:D stack:25336 pid:6121 tgid:6119 ppid:5835 task_flags:0x440040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5313 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6696 __schedule_loop kernel/sched/core.c:6774 [inline] schedule+0x165/0x360 kernel/sched/core.c:6789 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6846 rwsem_down_read_slowpath+0x552/0x880 kernel/locking/rwsem.c:1084 __down_read_common kernel/locking/rwsem.c:1248 [inline] __down_read kernel/locking/rwsem.c:1261 [inline] down_read+0x98/0x2e0 kernel/locking/rwsem.c:1526 filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 filemap_get_pages+0x43c/0x1ea0 mm/filemap.c:2603 filemap_splice_read+0x4fc/0xbc0 mm/filemap.c:2991 do_splice_read fs/splice.c:979 [inline] splice_direct_to_actor+0x4a6/0xcc0 fs/splice.c:1083 do_splice_direct_actor fs/splice.c:1201 [inline] do_splice_direct+0x181/0x270 fs/splice.c:1227 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7eef18e929 RSP: 002b:00007f7eeffe3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f7eef3b5fa0 RCX: 00007f7eef18e929 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000003 RBP: 00007f7eef210b39 R08: 0000000000000000 R09: 0000000000000000 R10: 000400000000003f R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7eef3b5fa0 R15: 00007ffd819dd3e8 INFO: task syz.1.50:6124 blocked for more than 146 seconds. Not tainted 6.16.0-rc3-next-20250627-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.50 state:D stack:28936 pid:6124 tgid:6119 ppid:5835 task_flags:0x400040 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5313 [inline] __schedule+0x16f5/0x4d00 kernel/sched/core.c:6696 __schedule_loop kernel/sched/core.c:6774 [inline] schedule+0x165/0x360 kernel/sched/core.c:6789 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6846 rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1578 inode_lock include/linux/fs.h:869 [inline] blkdev_fallocate+0x1d8/0x4b0 block/fops.c:877 vfs_fallocate+0x6a0/0x830 fs/open.c:341 ksys_fallocate fs/open.c:365 [inline] __do_sys_fallocate fs/open.c:370 [inline] __se_sys_fallocate fs/open.c:368 [inline] __x64_sys_fallocate+0xc0/0x110 fs/open.c:368 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7eef18e929 RSP: 002b:00007f7eeffc2038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 00007f7eef3b6080 RCX: 00007f7eef18e929 RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004 RBP: 00007f7eef210b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000200 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7eef3b6080 R15: 00007ffd819dd3e8 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8e33bf20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e33bf20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8e33bf20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770 2 locks held by getty/5597: #0: ffff88814c7f90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000331b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 3 locks held by syz.0.26/6033: 1 lock held by syz.3.42/6097: #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 2 locks held by syz.3.42/6098: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 #1: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #1: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.1.50/6121: #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.1.50/6124: #0: ffff8880232787a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #0: ffff8880232787a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x1d8/0x4b0 block/fops.c:877 1 lock held by syz.2.61/6158: #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.5.86/6343: #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.4.95/6386: #0: ffff8880232787a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff8880232787a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 2 locks held by syz.7.99/6399: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 #1: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #1: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.7.99/6400: #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023278940 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.6.109/6423: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_llseek+0x6a/0xc0 block/fops.c:588 1 lock held by syz.6.109/6424: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.8.110/6456: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.9.119/6534: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.3.123/6559: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.0.128/6579: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.0.128/6580: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_llseek+0x6a/0xc0 block/fops.c:588 1 lock held by syz.1.135/6617: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.2.144/6672: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.2.144/6674: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.4.149/6732: #0: ffff8880232787a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff8880232787a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.5.155/6777: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.7.172/6862: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.6.176/6883: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.8.204/7014: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.3.196/7130: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.0.207/7170: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.2.209/7243: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.2.209/7244: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 1 lock held by syz.1.224/7299: #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888148c887a0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 2 locks held by syz-executor/7311: #0: ffffffff8f729f08 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:633 [inline] #0: ffffffff8f729f08 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0 drivers/net/tun.c:3396 #1: ffffffff8e341a38 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #1: ffffffff8e341a38 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:967 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc3-next-20250627-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: 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:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline] watchdog+0xfee/0x1030 kernel/hung_task.c:470 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 3 Comm: pool_workqueue_ Not tainted 6.16.0-rc3-next-20250627-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:remove_class_from_lock_chains kernel/locking/lockdep.c:6238 [inline] RIP: 0010:zap_class+0xb0/0x360 kernel/locking/lockdep.c:6284 Code: 0f af de 45 31 e4 48 c7 c5 d0 57 cb 93 eb 10 49 ff c4 49 81 fc 00 00 08 00 0f 84 a5 01 00 00 4e 8b 2c e5 60 53 87 93 4d 85 ed <0f> 94 c0 49 83 c5 f8 0f 94 c1 08 c1 75 d7 45 8b 7d 00 41 f6 c7 fc RSP: 0018:ffffc90000087bc0 EFLAGS: 00000046 RAX: 0000000000003901 RBX: 0000000000000d9d RCX: 0000000000003901 RDX: ffffffff93875358 RSI: 0000000000000004 RDI: 0000000000041404 RBP: ffffffff93cb57d0 R08: 0000000000000000 R09: ffffffff81ab0058 R10: dffffc0000000000 R11: fffffbfff1f85587 R12: 0000000000059a2a R13: 0000000000000000 R14: ffffffff92ccc58e R15: 000000000000392f FS: 0000000000000000(0000) GS:ffff8881259e6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055fde22d9d51 CR3: 0000000030ef2000 CR4: 00000000003526f0 Call Trace: __lockdep_free_key_range kernel/locking/lockdep.c:6410 [inline] lockdep_unregister_key+0x1a6/0x310 kernel/locking/lockdep.c:6612 wq_unregister_lockdep kernel/workqueue.c:4819 [inline] pwq_release_workfn+0x6d5/0x870 kernel/workqueue.c:5115 kthread_worker_fn+0x507/0xb60 kernel/kthread.c:1009 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245