INFO: task syz-executor.4:5673 can't die for more than 142 seconds. task:syz-executor.4 state:R running task stack:23776 pid: 5673 ppid: 5328 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4955 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6236 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6408 __cond_resched+0x13/0x20 kernel/sched/core.c:8121 _cond_resched include/linux/sched.h:2033 [inline] __perform_reclaim mm/page_alloc.c:4578 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4607 [inline] __alloc_pages_slowpath.constprop.0+0x9c7/0x2290 mm/page_alloc.c:5024 __alloc_pages+0x412/0x500 mm/page_alloc.c:5395 alloc_pages+0x1a7/0x300 mm/mempolicy.c:2197 folio_alloc+0x1c/0x70 mm/mempolicy.c:2207 filemap_alloc_folio+0x8e/0xb0 mm/filemap.c:1029 __page_cache_alloc include/linux/pagemap.h:325 [inline] page_cache_ra_unbounded+0x36a/0x940 mm/readahead.c:215 do_page_cache_ra+0xf9/0x140 mm/readahead.c:268 do_sync_mmap_readahead mm/filemap.c:2986 [inline] filemap_fault+0x1562/0x26d0 mm/filemap.c:3079 __do_fault+0x10d/0x4d0 mm/memory.c:3849 do_read_fault mm/memory.c:4155 [inline] do_fault mm/memory.c:4284 [inline] handle_pte_fault mm/memory.c:4542 [inline] __handle_mm_fault+0x28e8/0x5120 mm/memory.c:4677 handle_mm_fault+0x1c8/0x790 mm/memory.c:4775 do_user_addr_fault+0x48b/0x11c0 arch/x86/mm/fault.c:1397 handle_page_fault arch/x86/mm/fault.c:1485 [inline] exc_page_fault+0x9e/0x180 arch/x86/mm/fault.c:1541 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:568 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x30 arch/x86/lib/copy_user_64.S:206 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 0f 1f 80 00 00 00 00 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 66 2e 0f 1f 84 00 00 00 00 00 89 d1 f3 a4 RSP: 0018:ffffc900045d7a48 EFLAGS: 00050202 RAX: 0000000000000001 RBX: 0000000000000f80 RCX: 0000000000000f80 RDX: 0000000000000f80 RSI: 000000002034afa4 RDI: ffff88802eb44080 RBP: ffff88802eb44080 R08: 0000000000000001 R09: ffff88802eb44fff R10: ffffed1005d689ff R11: 0000000000000000 R12: 000000002034afa4 R13: 000000002034bf24 R14: 0000000000000000 R15: 0000000000000000 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:52 [inline] copyin.part.0+0xe4/0x110 lib/iov_iter.c:168 copyin lib/iov_iter.c:275 [inline] copy_page_from_iter_iovec lib/iov_iter.c:312 [inline] copy_page_from_iter+0x389/0x7c0 lib/iov_iter.c:855 process_vm_rw_pages mm/process_vm_access.c:43 [inline] process_vm_rw_single_vec mm/process_vm_access.c:117 [inline] process_vm_rw_core.constprop.0+0x4d9/0x990 mm/process_vm_access.c:215 process_vm_rw+0x29c/0x300 mm/process_vm_access.c:283 __do_sys_process_vm_writev mm/process_vm_access.c:303 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:298 [inline] __x64_sys_process_vm_writev+0xdf/0x1b0 mm/process_vm_access.c:298 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: 0033:0x7f05c98698d9 RSP: 002b:00007f05c6de0188 EFLAGS: 00000246 ORIG_RAX: 0000000000000137 RAX: ffffffffffffffda RBX: 00007f05c996df60 RCX: 00007f05c98698d9 RDX: 0000000000000002 RSI: 0000000020c22000 RDI: 0000000000000004 RBP: 00007f05c98c3cb4 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000020c22fa0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc43b0235f R14: 00007f05c6de0300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b981260 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 1 lock held by kswapd0/98: 1 lock held by kswapd1/99: 1 lock held by systemd-journal/2967: #0: ffff88801aaf8590 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:841 [inline] #0: ffff88801aaf8590 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_fault+0x15ad/0x26d0 mm/filemap.c:3086 2 locks held by agetty/6458: #0: ffff88801c33e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc90001b8c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 3 locks held by kworker/u4:7/8599: 1 lock held by syz-executor.4/5673: ============================================= ---------------- Code disassembly (best guess): 0: 89 d1 mov %edx,%ecx 2: c1 e9 03 shr $0x3,%ecx 5: 83 e2 07 and $0x7,%edx 8: f3 48 a5 rep movsq %ds:(%rsi),%es:(%rdi) b: 89 d1 mov %edx,%ecx d: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) f: 31 c0 xor %eax,%eax 11: 0f 01 ca clac 14: c3 retq 15: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1c: 0f 01 cb stac 1f: 83 fa 40 cmp $0x40,%edx 22: 0f 82 70 ff ff ff jb 0xffffff98 28: 89 d1 mov %edx,%ecx * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 31 c0 xor %eax,%eax 2e: 0f 01 ca clac 31: c3 retq 32: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 39: 00 00 00 3c: 89 d1 mov %edx,%ecx 3e: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi)