INFO: task syz.8.4927:24787 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.8.4927 state:D stack:25096 pid:24787 tgid:24787 ppid:20367 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: 0033:0x7f5abb356662 RSP: 002b:00007ffd98160ce8 EFLAGS: 00010246 RAX: 0000200000000040 RBX: 0000000000000004 RCX: 8000000000000030 RDX: 0000000000000001 RSI: 00007f5abae0029c RDI: 0000200000000040 RBP: 00007f5abb5b7ba0 R08: 00007f5abb200000 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000009 R12: 00007f5abb5b5fac R13: 00007f5abb5b5fa0 R14: fffffffffffffffe R15: 00007ffd98160e00 INFO: task syz.8.4927:24789 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.8.4927 state:D stack:28104 pid:24789 tgid:24787 ppid:20367 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_read_fault mm/memory.c:5586 [inline] do_fault mm/memory.c:5720 [inline] do_pte_missing mm/memory.c:4247 [inline] handle_pte_fault mm/memory.c:6065 [inline] __handle_mm_fault+0x3611/0x5440 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:do_strncpy_from_user lib/strncpy_from_user.c:41 [inline] RIP: 0010:strncpy_from_user+0xb7/0x290 lib/strncpy_from_user.c:130 Code: 00 00 4c 89 f6 e8 89 32 bc fc 49 83 fe 07 0f 86 9d 00 00 00 48 89 1c 24 4c 89 74 24 08 48 c7 c5 f8 ff ff ff 45 31 e4 4c 89 fb <4f> 8b 34 27 48 b8 ff fe fe fe fe fe fe fe 4d 8d 3c 06 4d 89 f5 49 RSP: 0018:ffffc9000d3e7d30 EFLAGS: 00050246 RAX: ffffffff8503f4b7 RBX: 0000200000000080 RCX: ffff8880278b3c00 RDX: 0000000000000000 RSI: 0000000000000fe0 RDI: 0000000000000007 RBP: fffffffffffffff8 R08: ffff88807f7db1ff R09: 1ffff1100fefb63f R10: dffffc0000000000 R11: ffffed100fefb640 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000fe0 R15: 0000200000000080 getname_flags+0xf3/0x540 fs/namei.c:157 getname include/linux/fs.h:2909 [inline] do_sys_openat2+0xbc/0x1c0 fs/open.c:1428 do_sys_open fs/open.c:1449 [inline] __do_sys_openat fs/open.c:1465 [inline] __se_sys_openat fs/open.c:1460 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1460 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: 0033:0x7f5abb38e929 RSP: 002b:00007f5abc18a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f5abb5b6080 RCX: 00007f5abb38e929 RDX: 0000000000000001 RSI: 0000200000000080 RDI: ffffffffffffff9c RBP: 00007f5abb410b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5abb5b6080 R15: 00007ffd98160b88 INFO: task syz.0.4939:24828 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.0.4939 state:D stack:24808 pid:24828 tgid:24827 ppid:23197 task_flags:0x440040 flags:0x00004006 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:ffffc9000d1c77f8 EFLAGS: 00050206 RAX: ffffffff84cb4501 RBX: ffff88805a44b000 RCX: 0000000000001000 RDX: 0000000000000000 RSI: ffff88805a44b000 RDI: 00002000000b1100 RBP: ffffc9000d1c7948 R08: ffff88805a44bfff R09: 1ffff1100b4897ff R10: dffffc0000000000 R11: ffffed100b489800 R12: 1ffff92001a38faf R13: 00002000000b1100 R14: ffffc9000d1c7d88 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: 0033:0x7f502038e929 RSP: 002b:00007f50211c9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f50205b5fa0 RCX: 00007f502038e929 RDX: 00000000fffffe5a RSI: 0000200000000100 RDI: 0000000000000003 RBP: 00007f5020410b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f50205b5fa0 R15: 00007ffefb3b6f68 INFO: task syz.0.4939:24829 blocked for more than 148 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.0.4939 state:D stack:24520 pid:24829 tgid:24827 ppid:23197 task_flags:0x440140 flags:0x00004006 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:__put_user_4+0xd/0x20 arch/x86/lib/putuser.S:94 Code: 66 89 01 31 c9 0f 01 ca e9 50 3a 03 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <89> 01 31 c9 0f 01 ca c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000d057c98 EFLAGS: 00050202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000200000005438 RDX: 0000000000000000 RSI: ffffffff8dc50382 RDI: ffffffff8be4ab80 RBP: ffffc9000d057eb0 R08: 0000000000000000 R09: ffffffff820ca320 R10: 00000000ffffff97 R11: 0000000000000002 R12: 0000200000005400 R13: 0000000004040000 R14: 0000200000003cc0 R15: 000000000000005d __sys_sendmmsg+0x25f/0x430 net/socket.c:2762 __do_sys_sendmmsg net/socket.c:2784 [inline] __se_sys_sendmmsg net/socket.c:2781 [inline] __x64_sys_sendmmsg+0xa0/0xc0 net/socket.c:2781 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: 0033:0x7f502038e929 RSP: 002b:00007f50211a8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f50205b6080 RCX: 00007f502038e929 RDX: 0400000000000172 RSI: 0000200000003cc0 RDI: 0000000000000007 RBP: 00007f5020410b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000004000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f50205b6080 R15: 00007ffefb3b6f68 INFO: task syz.0.4939:24830 blocked for more than 149 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.0.4939 state:D stack:25640 pid:24830 tgid:24827 ppid:23197 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_read_fault mm/memory.c:5586 [inline] do_fault mm/memory.c:5720 [inline] do_pte_missing mm/memory.c:4247 [inline] handle_pte_fault mm/memory.c:6065 [inline] __handle_mm_fault+0x3611/0x5440 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:__get_user_8+0x14/0x30 arch/x86/lib/getuser.S:103 Code: ca e9 90 f8 03 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 ba 00 f0 ff ff ff 7f 00 00 48 39 d0 48 0f 47 c2 0f 01 cb <48> 8b 10 31 c0 0f 01 ca c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc9000d02feb8 EFLAGS: 00050283 RAX: 0000200000000340 RBX: 0000200000000340 RCX: 9f6c28eea6249e00 RDX: 00007ffffffff000 RSI: ffffffff8dc50382 RDI: ffffffff8be4ab80 RBP: ffffc9000d02ff48 R08: 0000000000000000 R09: ffffffff820ca320 R10: dffffc0000000000 R11: fffffbfff1f85587 R12: 00000000000000ce R13: 00000000000000ce R14: 0000000000000004 R15: ffff8880291fbc00 __do_sys_io_setup fs/aio.c:1388 [inline] __se_sys_io_setup+0x2d/0x1a0 fs/aio.c:1382 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: 0033:0x7f502038e929 RSP: 002b:00007f5021187038 EFLAGS: 00000246 ORIG_RAX: 00000000000000ce RAX: ffffffffffffffda RBX: 00007f50205b6160 RCX: 00007f502038e929 RDX: 0000000000000000 RSI: 0000200000000340 RDI: 0000000000000004 RBP: 00007f5020410b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f50205b6160 R15: 00007ffefb3b6f68 INFO: task syz.6.4952:24876 blocked for more than 150 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.6.4952 state:D stack:26920 pid:24876 tgid:24876 ppid:24663 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: 0033:0x7fe09bd56698 RSP: 002b:00007ffc15b70d98 EFLAGS: 00010202 RAX: 0000200000000080 RBX: 0000000000000004 RCX: 0030626c6c756e2f RDX: 000000000000000c RSI: 6c756e2f7665642f RDI: 0000200000000080 RBP: 00007fe09bfb7ba0 R08: 00007fe09bc00000 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000009 R12: 00007fe09bfb5fac R13: 00007fe09bfb5fa0 R14: fffffffffffffffe R15: 00007ffc15b70eb0 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/5593: #0: ffff88814d7bd0a0 (&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 kworker/u8:15/22587: 2 locks held by syz.7.4916/24741: 1 lock held by syz.8.4927/24787: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.8.4927/24789: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 2 locks held by syz.0.4939/24828: #0: ffff888023009320 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888023009320 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_read_iter+0x2f8/0x440 block/fops.c:832 #1: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #1: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.0.4939/24829: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.0.4939/24830: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.6.4952/24876: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.2.4968/25131: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.3.4973/25175: #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.5.4993/25367: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.1.5003/25441: #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.4.5004/25449: #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.9.5018/25747: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.8.5019/25988: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.7.5028/26011: #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.2.5119/26661: #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:884 [inline] #0: ffff888023012a20 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_write_iter+0x50b/0x710 block/fops.c:778 1 lock held by syz.3.5127/26717: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 1 lock held by syz.6.5131/26738: #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline] #0: ffff888023012bc0 (mapping.invalidate_lock){++++}-{4:4}, at: page_cache_ra_order+0x318/0xd40 mm/readahead.c:488 2 locks held by syz.1.5159/27287: 4 locks held by syz.5.5200/27327: #0: ffff88808ef84dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:499 [inline] #0: ffff88808ef84dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x212/0x510 net/bluetooth/hci_core.c:2715 #1: ffff88808ef840b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x66a/0x1330 net/bluetooth/hci_sync.c:5234 #2: ffffffff8f890ee8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2048 [inline] #2: ffffffff8f890ee8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xa1/0x230 net/bluetooth/hci_conn.c:2560 #3: ffff888097d2bb38 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x70/0x680 net/bluetooth/l2cap_core.c:1762 3 locks held by syz.4.5204/27357: #0: ffff88805b338dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:499 [inline] #0: ffff88805b338dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x212/0x510 net/bluetooth/hci_core.c:2715 #1: ffff88805b3380b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x66a/0x1330 net/bluetooth/hci_sync.c:5234 #2: ffffffff8f890ee8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2048 [inline] #2: ffffffff8f890ee8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xa1/0x230 net/bluetooth/hci_conn.c:2560 3 locks held by syz.0.5207/27370: #0: ffff8880484c4dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:499 [inline] #0: ffff8880484c4dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x212/0x510 net/bluetooth/hci_core.c:2715 #1: ffff8880484c40b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x66a/0x1330 net/bluetooth/hci_sync.c:5234 #2: ffffffff8e341a38 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline] #2: ffffffff8e341a38 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:967 3 locks held by dhcpcd-run-hook/27449: ============================================= NMI backtrace for cpu 0 CPU: 0 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 12 Comm: kworker/u8:0 Not tainted 6.16.0-rc3-next-20250627-syzkaller #0 PREEMPT(full)