------------[ cut here ]------------ ====================================================== WARNING: possible circular locking dependency detected 6.11.0-rc4-next-20240822-syzkaller #0 Not tainted ------------------------------------------------------ syz.0.504/7539 is trying to acquire lock: ffffffff8e815218 ((console_sem).lock){-.-.}-{2:2}, at: down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139 but task is already holding lock: ffff8880b903ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:595 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&rq->__lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:587 raw_spin_rq_lock kernel/sched/sched.h:1488 [inline] task_rq_lock+0xc6/0x360 kernel/sched/core.c:689 cgroup_move_task+0x92/0x2d0 kernel/sched/psi.c:1161 css_set_move_task+0x72e/0x950 kernel/cgroup/cgroup.c:898 cgroup_post_fork+0x256/0x880 kernel/cgroup/cgroup.c:6690 copy_process+0x39e9/0x3d50 kernel/fork.c:2598 kernel_clone+0x226/0x8f0 kernel/fork.c:2784 user_mode_thread+0x132/0x1a0 kernel/fork.c:2862 rest_init+0x23/0x300 init/main.c:712 start_kernel+0x47f/0x500 init/main.c:1105 x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:507 x86_64_start_kernel+0x9f/0xa0 arch/x86/kernel/head64.c:488 common_startup_64+0x13e/0x147 -> #1 (&p->pi_lock){-.-.}-{2:2}: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline] try_to_wake_up+0xb0/0x1480 kernel/sched/core.c:4150 up+0x72/0x90 kernel/locking/semaphore.c:191 __up_console_sem kernel/printk/printk.c:342 [inline] __console_unlock kernel/printk/printk.c:2828 [inline] console_unlock+0x22f/0x4d0 kernel/printk/printk.c:3155 vprintk_emit+0x87d/0xa10 kernel/printk/printk.c:2399 _printk+0xd5/0x120 kernel/printk/printk.c:2424 batadv_check_known_mac_addr+0x2bd/0x410 net/batman-adv/hard-interface.c:528 batadv_hard_if_event+0x3a5/0x1620 net/batman-adv/hard-interface.c:998 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2032 [inline] call_netdevice_notifiers net/core/dev.c:2046 [inline] dev_set_mac_address+0x3d9/0x510 net/core/dev.c:9102 dev_set_mac_address_user+0x31/0x50 net/core/dev.c:9116 do_setlink+0x8b6/0x41f0 net/core/rtnetlink.c:2855 __rtnl_newlink net/core/rtnetlink.c:3696 [inline] rtnl_newlink+0x180d/0x20a0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x73f/0xcf0 net/core/rtnetlink.c:6647 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a8/0x500 net/socket.c:2204 __do_sys_sendto net/socket.c:2216 [inline] __se_sys_sendto net/socket.c:2212 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2212 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 ((console_sem).lock){-.-.}-{2:2}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139 __down_trylock_console_sem+0x109/0x250 kernel/printk/printk.c:325 console_trylock kernel/printk/printk.c:2811 [inline] console_trylock_spinning kernel/printk/printk.c:1985 [inline] vprintk_emit+0x4b2/0xa10 kernel/printk/printk.c:2398 _printk+0xd5/0x120 kernel/printk/printk.c:2424 __report_bug lib/bug.c:195 [inline] report_bug+0x346/0x500 lib/bug.c:219 handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621 place_entity+0x463/0x520 kernel/sched/fair.c:5337 enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409 enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985 enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014 activate_task kernel/sched/core.c:2056 [inline] ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665 ttwu_queue kernel/sched/core.c:3940 [inline] try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266 swake_up_locked kernel/sched/swait.c:29 [inline] complete_with_flags kernel/sched/completion.c:24 [inline] complete+0xac/0x1c0 kernel/sched/completion.c:47 csd_do_func kernel/smp.c:134 [inline] __flush_smp_call_function_queue+0xb88/0x1690 kernel/smp.c:571 __sysvec_call_function_single+0xb8/0x430 arch/x86/kernel/smp.c:271 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 arch_static_branch arch/x86/include/asm/jump_label.h:33 [inline] page_table_check_ptes_set include/linux/page_table_check.h:71 [inline] set_ptes include/linux/pgtable.h:267 [inline] wp_page_copy mm/memory.c:3405 [inline] do_wp_page+0x3dbf/0x52f0 mm/memory.c:3727 handle_pte_fault+0x1199/0x67c0 mm/memory.c:5538 __handle_mm_fault mm/memory.c:5665 [inline] handle_mm_fault+0x1029/0x1980 mm/memory.c:5833 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 __put_user_4+0x11/0x20 arch/x86/lib/putuser.S:86 __sys_sendmmsg+0x514/0x740 net/socket.c:2742 __do_sys_sendmmsg net/socket.c:2766 [inline] __se_sys_sendmmsg net/socket.c:2763 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: (console_sem).lock --> &p->pi_lock --> &rq->__lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rq->__lock); lock(&p->pi_lock); lock(&rq->__lock); lock((console_sem).lock); *** DEADLOCK *** 6 locks held by syz.0.504/7539: #0: ffff8880303b3a98 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_trylock include/linux/mmap_lock.h:163 [inline] #0: ffff8880303b3a98 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:5870 [inline] #0: ffff8880303b3a98 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:5930 #1: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #1: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffffff8e939ae0 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x82/0x380 mm/pgtable-generic.c:287 #2: ffff88802fa434f8 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff88802fa434f8 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: __pte_offset_map_lock+0x1ba/0x300 mm/pgtable-generic.c:375 #3: ffffc9000346fb40 (&x->wait#49){-.-.}-{2:2}, at: complete_with_flags kernel/sched/completion.c:20 [inline] #3: ffffc9000346fb40 (&x->wait#49){-.-.}-{2:2}, at: complete+0x28/0x1c0 kernel/sched/completion.c:47 #4: ffff888055fc0a18 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:551 [inline] #4: ffff888055fc0a18 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xb0/0x1480 kernel/sched/core.c:4150 #5: ffff8880b903ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:595 stack backtrace: CPU: 0 UID: 0 PID: 7539 Comm: syz.0.504 Not tainted 6.11.0-rc4-next-20240822-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162 down_trylock+0x20/0xa0 kernel/locking/semaphore.c:139 __down_trylock_console_sem+0x109/0x250 kernel/printk/printk.c:325 console_trylock kernel/printk/printk.c:2811 [inline] console_trylock_spinning kernel/printk/printk.c:1985 [inline] vprintk_emit+0x4b2/0xa10 kernel/printk/printk.c:2398 _printk+0xd5/0x120 kernel/printk/printk.c:2424 __report_bug lib/bug.c:195 [inline] report_bug+0x346/0x500 lib/bug.c:219 handle_bug+0x60/0x90 arch/x86/kernel/traps.c:285 exc_invalid_op+0x1a/0x50 arch/x86/kernel/traps.c:309 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:621 RIP: 0010:place_entity+0x463/0x520 kernel/sched/fair.c:5337 Code: 27 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 48 8b 3c 24 4c 89 fe e8 77 14 00 00 48 89 04 24 e9 e0 fd ff ff 90 <0f> 0b 90 41 bd 01 00 00 00 e9 22 ff ff ff 89 d9 80 e1 07 38 c1 0f RSP: 0018:ffffc90000007bf0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 RDX: 0000000000000400 RSI: ffff888055fc0080 RDI: ffff888055fc0100 RBP: dffffc0000000000 R08: 0000000000000382 R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: 0000000130df0e62 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888055fc0080 enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409 enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985 enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014 activate_task kernel/sched/core.c:2056 [inline] ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665 ttwu_queue kernel/sched/core.c:3940 [inline] try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266 swake_up_locked kernel/sched/swait.c:29 [inline] complete_with_flags kernel/sched/completion.c:24 [inline] complete+0xac/0x1c0 kernel/sched/completion.c:47 csd_do_func kernel/smp.c:134 [inline] __flush_smp_call_function_queue+0xb88/0x1690 kernel/smp.c:571 __sysvec_call_function_single+0xb8/0x430 arch/x86/kernel/smp.c:271 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:33 [inline] RIP: 0010:page_table_check_ptes_set include/linux/page_table_check.h:71 [inline] RIP: 0010:set_ptes include/linux/pgtable.h:267 [inline] RIP: 0010:wp_page_copy mm/memory.c:3405 [inline] RIP: 0010:do_wp_page+0x3dbf/0x52f0 mm/memory.c:3727 Code: 74 08 48 89 df e8 11 2e 1a 00 48 83 3b 00 0f 84 15 03 00 00 e8 02 a7 b1 ff e8 fd 18 b3 ff 45 31 e4 e9 7a ed ff ff f3 0f 1e fa ec a6 b1 ff 48 8b 7c 24 60 4c 89 f6 4c 89 fa b9 01 00 00 00 e8 RSP: 0018:ffffc900033cf100 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc900033cf818 RCX: 1ffff92000679f03 RDX: ffffc9000a80d000 RSI: 0000000000013eea RDI: 0000000000013eeb RBP: ffffc900033cf330 R08: ffffffff81cfbbfc R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: ffffc900033cf1c0 R13: ffffc900033cf810 R14: ffff88806e2dd058 R15: 000000005b5a8867 handle_pte_fault+0x1199/0x67c0 mm/memory.c:5538 __handle_mm_fault mm/memory.c:5665 [inline] handle_mm_fault+0x1029/0x1980 mm/memory.c:5833 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__put_user_4+0x11/0x20 arch/x86/lib/putuser.S:88 Code: 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 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 0f 1f 00 90 90 90 90 90 90 90 RSP: 0018:ffffc900033cf9d8 EFLAGS: 00050202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000002000b038 RDX: 000000002000b000 RSI: ffffffff8c0adfc0 RDI: ffffffff8c609f20 RBP: ffffc900033cfed0 R08: ffffffff901c12ef R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: 1ffff92000679f48 R13: dffffc0000000000 R14: 0000000000000178 R15: 0000000000000400 __sys_sendmmsg+0x514/0x740 net/socket.c:2742 __do_sys_sendmmsg net/socket.c:2766 [inline] __se_sys_sendmmsg net/socket.c:2763 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8280179e79 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8280f52038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f8280316058 RCX: 00007f8280179e79 RDX: 0000000004000095 RSI: 0000000020005240 RDI: 0000000000000004 RBP: 00007f82801e7916 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000810 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8280316058 R15: 00007ffddb036df8 WARNING: CPU: 0 PID: 7539 at kernel/sched/fair.c:5337 place_entity+0x463/0x520 kernel/sched/fair.c:5337 Modules linked in: CPU: 0 UID: 0 PID: 7539 Comm: syz.0.504 Not tainted 6.11.0-rc4-next-20240822-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:place_entity+0x463/0x520 kernel/sched/fair.c:5337 Code: 27 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 48 8b 3c 24 4c 89 fe e8 77 14 00 00 48 89 04 24 e9 e0 fd ff ff 90 <0f> 0b 90 41 bd 01 00 00 00 e9 22 ff ff ff 89 d9 80 e1 07 38 c1 0f RSP: 0018:ffffc90000007bf0 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000100000 RDX: 0000000000000400 RSI: ffff888055fc0080 RDI: ffff888055fc0100 RBP: dffffc0000000000 R08: 0000000000000382 R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: 0000000130df0e62 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888055fc0080 FS: 00007f8280f526c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002000b038 CR3: 000000005d5a6000 CR4: 00000000003506f0 Call Trace: enqueue_entity+0x271/0x1920 kernel/sched/fair.c:5409 enqueue_task_fair+0x206/0xe30 kernel/sched/fair.c:6985 enqueue_task+0x1a5/0x300 kernel/sched/core.c:2014 activate_task kernel/sched/core.c:2056 [inline] ttwu_do_activate+0x1d1/0x7e0 kernel/sched/core.c:3665 ttwu_queue kernel/sched/core.c:3940 [inline] try_to_wake_up+0x8bc/0x1480 kernel/sched/core.c:4266 swake_up_locked kernel/sched/swait.c:29 [inline] complete_with_flags kernel/sched/completion.c:24 [inline] complete+0xac/0x1c0 kernel/sched/completion.c:47 csd_do_func kernel/smp.c:134 [inline] __flush_smp_call_function_queue+0xb88/0x1690 kernel/smp.c:571 __sysvec_call_function_single+0xb8/0x430 arch/x86/kernel/smp.c:271 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline] sysvec_call_function_single+0x9e/0xc0 arch/x86/kernel/smp.c:266 asm_sysvec_call_function_single+0x1a/0x20 arch/x86/include/asm/idtentry.h:709 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:33 [inline] RIP: 0010:page_table_check_ptes_set include/linux/page_table_check.h:71 [inline] RIP: 0010:set_ptes include/linux/pgtable.h:267 [inline] RIP: 0010:wp_page_copy mm/memory.c:3405 [inline] RIP: 0010:do_wp_page+0x3dbf/0x52f0 mm/memory.c:3727 Code: 74 08 48 89 df e8 11 2e 1a 00 48 83 3b 00 0f 84 15 03 00 00 e8 02 a7 b1 ff e8 fd 18 b3 ff 45 31 e4 e9 7a ed ff ff f3 0f 1e fa ec a6 b1 ff 48 8b 7c 24 60 4c 89 f6 4c 89 fa b9 01 00 00 00 e8 RSP: 0018:ffffc900033cf100 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc900033cf818 RCX: 1ffff92000679f03 RDX: ffffc9000a80d000 RSI: 0000000000013eea RDI: 0000000000013eeb RBP: ffffc900033cf330 R08: ffffffff81cfbbfc R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: ffffc900033cf1c0 R13: ffffc900033cf810 R14: ffff88806e2dd058 R15: 000000005b5a8867 handle_pte_fault+0x1199/0x67c0 mm/memory.c:5538 __handle_mm_fault mm/memory.c:5665 [inline] handle_mm_fault+0x1029/0x1980 mm/memory.c:5833 do_user_addr_fault arch/x86/mm/fault.c:1389 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__put_user_4+0x11/0x20 arch/x86/lib/putuser.S:88 Code: 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 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 0f 1f 00 90 90 90 90 90 90 90 RSP: 0018:ffffc900033cf9d8 EFLAGS: 00050202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000002000b038 RDX: 000000002000b000 RSI: ffffffff8c0adfc0 RDI: ffffffff8c609f20 RBP: ffffc900033cfed0 R08: ffffffff901c12ef R09: 1ffffffff203825d R10: dffffc0000000000 R11: fffffbfff203825e R12: 1ffff92000679f48 R13: dffffc0000000000 R14: 0000000000000178 R15: 0000000000000400 __sys_sendmmsg+0x514/0x740 net/socket.c:2742 __do_sys_sendmmsg net/socket.c:2766 [inline] __se_sys_sendmmsg net/socket.c:2763 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8280179e79 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8280f52038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f8280316058 RCX: 00007f8280179e79 RDX: 0000000004000095 RSI: 0000000020005240 RDI: 0000000000000004 RBP: 00007f82801e7916 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000810 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8280316058 R15: 00007ffddb036df8 ---------------- Code disassembly (best guess): 0: 74 08 je 0xa 2: 48 89 df mov %rbx,%rdi 5: e8 11 2e 1a 00 call 0x1a2e1b a: 48 83 3b 00 cmpq $0x0,(%rbx) e: 0f 84 15 03 00 00 je 0x329 14: e8 02 a7 b1 ff call 0xffb1a71b 19: e8 fd 18 b3 ff call 0xffb3191b 1e: 45 31 e4 xor %r12d,%r12d 21: e9 7a ed ff ff jmp 0xffffeda0 26: f3 0f 1e fa endbr64 * 2a: e8 ec a6 b1 ff call 0xffb1a71b <-- trapping instruction 2f: 48 8b 7c 24 60 mov 0x60(%rsp),%rdi 34: 4c 89 f6 mov %r14,%rsi 37: 4c 89 fa mov %r15,%rdx 3a: b9 01 00 00 00 mov $0x1,%ecx 3f: e8 .byte 0xe8