BUG: workqueue lockup - pool cpus=0 node=0 flags=0x1 nice=0 stuck for 158s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: free_work pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=5/256 refcnt=6 pending: vmpressure_work_fn, kernfs_notify_workfn, vmstat_shepherd, psi_avgs_work, free_work workqueue events_long: flags=0x0 pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=5/256 refcnt=6 pending: br_fdb_cleanup, br_fdb_cleanup, br_fdb_cleanup, br_fdb_cleanup, br_fdb_cleanup workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=2/256 refcnt=3 pending: wg_ratelimiter_gc_entries, neigh_periodic_work pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=3/256 refcnt=4 pending: neigh_periodic_work, check_lifetime, gc_worker workqueue dm_bufio_cache: flags=0x8 pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: work_fn workqueue wg-kex-wg0: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=2/256 refcnt=3 in-flight: 24492:wg_packet_handshake_receive_worker pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=2/256 refcnt=3 in-flight: 24495:wg_packet_handshake_receive_worker wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=2/256 refcnt=3 in-flight: 6837:wg_packet_handshake_receive_worker pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x6 pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256 refcnt=3 in-flight: 10122:wg_packet_handshake_send_worker workqueue wg-kex-wg2: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=2/256 refcnt=3 in-flight: 24485:wg_packet_handshake_receive_worker wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=2/256 refcnt=3 in-flight: 6839:wg_packet_handshake_receive_worker wg_packet_handshake_receive_worker workqueue wg-kex-wg2: flags=0x6 pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/256 refcnt=4 in-flight: 10126:wg_packet_handshake_send_worker wg_packet_handshake_send_worker workqueue wg-kex-wg0: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=2/256 refcnt=3 in-flight: 24497:wg_packet_handshake_receive_worker wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=2/256 refcnt=3 in-flight: 6836:wg_packet_handshake_receive_worker pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x6 pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/256 refcnt=4 in-flight: 10124:wg_packet_handshake_send_worker wg_packet_handshake_send_worker workqueue wg-kex-wg0: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg2: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg2: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg2: flags=0x24 pwq 2: cpus=1 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 0: cpus=0 node=0 flags=0x1 nice=0 active=1/256 refcnt=2 pending: wg_packet_handshake_receive_worker pool 0: cpus=0 node=0 flags=0x1 nice=0 hung=158s workers=4 manager: 6838 pool 2: cpus=1 node=0 flags=0x1 nice=0 hung=82s workers=5 manager: 24491 pool 4: cpus=0-1 flags=0x4 nice=0 hung=0s workers=7 idle: 10125 22495 10119 NMI backtrace for cpu 0 CPU: 0 PID: 11871 Comm: syz-executor.0 Not tainted 5.10.87-syzkaller-00611-gc4d08791d941 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:compound_head include/linux/page-flags.h:190 [inline] RIP: 0010:get_page include/linux/mm.h:1217 [inline] RIP: 0010:copy_present_pte mm/memory.c:912 [inline] RIP: 0010:copy_pte_range+0x739/0x1e90 mm/memory.c:1017 Code: eb 05 e8 2a c2 cf ff 49 8d 5d 08 49 89 de 49 c1 ee 03 43 80 3c 26 00 74 08 48 89 df e8 40 97 09 00 48 89 5c 24 50 4d 8b 7d 08 <44> 89 fb 83 e3 01 31 ff 48 89 de e8 b7 c6 cf ff 4d 89 ec 48 85 db RSP: 0018:ffffc90015a5f580 EFLAGS: 00000246 RAX: ffffffff819d1e66 RBX: ffffea00057b3d08 RCX: ffff88817730bb40 RDX: 0000000000000000 RSI: 0000000000000028 RDI: 0000000000000020 RBP: ffffc90015a5f7b0 R08: ffffffff819d1dfa R09: fffff94000b0fb79 R10: fffff94000b0fb79 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffea00057b3d00 R14: 1ffffd4000af67a1 R15: dead000000000100 FS: 00007f28c2727700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f28c3607bc0 CR3: 00000001772a2000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: copy_pmd_range mm/memory.c:1097 [inline] copy_pud_range mm/memory.c:1134 [inline] copy_p4d_range mm/memory.c:1158 [inline] copy_page_range+0xbf3/0xff0 mm/memory.c:1231 dup_mmap+0xab4/0xf60 kernel/fork.c:611 dup_mm+0x91/0x320 kernel/fork.c:1408 copy_mm kernel/fork.c:1464 [inline] copy_process+0x1d1c/0x5340 kernel/fork.c:2148 kernel_clone+0x21f/0x9a0 kernel/fork.c:2510 __do_sys_fork+0xac/0x110 kernel/fork.c:2575 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f28c35f2e99 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f28c2727168 EFLAGS: 00000246 ORIG_RAX: 0000000000000039 RAX: ffffffffffffffda RBX: 00007f28c3706100 RCX: 00007f28c35f2e99 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f28c364cff1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeb622a57f R14: 00007f28c2727300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: eb 05 jmp 0x7 2: e8 2a c2 cf ff callq 0xffcfc231 7: 49 8d 5d 08 lea 0x8(%r13),%rbx b: 49 89 de mov %rbx,%r14 e: 49 c1 ee 03 shr $0x3,%r14 12: 43 80 3c 26 00 cmpb $0x0,(%r14,%r12,1) 17: 74 08 je 0x21 19: 48 89 df mov %rbx,%rdi 1c: e8 40 97 09 00 callq 0x99761 21: 48 89 5c 24 50 mov %rbx,0x50(%rsp) 26: 4d 8b 7d 08 mov 0x8(%r13),%r15 * 2a: 44 89 fb mov %r15d,%ebx <-- trapping instruction 2d: 83 e3 01 and $0x1,%ebx 30: 31 ff xor %edi,%edi 32: 48 89 de mov %rbx,%rsi 35: e8 b7 c6 cf ff callq 0xffcfc6f1 3a: 4d 89 ec mov %r13,%r12 3d: 48 85 db test %rbx,%rbx