====================================================== WARNING: possible circular locking dependency detected 4.20.0-rc7+ #164 Not tainted ------------------------------------------------------ syz-executor0/26058 is trying to acquire lock: 0000000093e05d96 (&ovl_i_mutex_dir_key[depth]){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] 0000000093e05d96 (&ovl_i_mutex_dir_key[depth]){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 but task is already holding lock: 00000000a8520e67 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10511 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072 mutex_lock_killable_nested+0x16/0x20 kernel/locking/mutex.c:1102 do_io_accounting+0x1d2/0xf80 fs/proc/base.c:2703 proc_tgid_io_accounting+0x22/0x30 fs/proc/base.c:2752 proc_single_show+0x101/0x190 fs/proc/base.c:737 traverse+0x344/0x7b0 fs/seq_file.c:113 seq_read+0xc76/0x1150 fs/seq_file.c:188 __vfs_read+0x117/0x9b0 fs/read_write.c:416 vfs_read+0x17f/0x3c0 fs/read_write.c:452 ksys_pread64+0x181/0x1b0 fs/read_write.c:626 __do_sys_pread64 fs/read_write.c:636 [inline] __se_sys_pread64 fs/read_write.c:633 [inline] __x64_sys_pread64+0x97/0xf0 fs/read_write.c:633 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x166/0x1700 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 seq_read+0x71/0x1150 fs/seq_file.c:161 proc_reg_read+0x2a3/0x3d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:700 [inline] do_iter_read+0x4a3/0x650 fs/read_write.c:924 vfs_readv+0x175/0x1c0 fs/read_write.c:986 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x539/0xb20 fs/splice.c:417 do_splice_to+0x12e/0x190 fs/splice.c:880 splice_direct_to_actor+0x31c/0x9d0 fs/splice.c:957 do_splice_direct+0x2d4/0x420 fs/splice.c:1066 do_sendfile+0x62a/0xe20 fs/read_write.c:1439 __do_sys_sendfile64 fs/read_write.c:1500 [inline] __se_sys_sendfile64 fs/read_write.c:1486 [inline] __x64_sys_sendfile64+0x1fd/0x250 fs/read_write.c:1486 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (sb_writers#3){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x214/0x370 fs/super.c:1387 sb_start_write include/linux/fs.h:1597 [inline] mnt_want_write+0x3f/0xc0 fs/namespace.c:360 ovl_want_write+0x76/0xa0 fs/overlayfs/util.c:24 ovl_create_object+0x142/0x3a0 fs/overlayfs/dir.c:599 ovl_create+0x2b/0x30 fs/overlayfs/dir.c:630 lookup_open+0x1319/0x1b90 fs/namei.c:3234 do_last fs/namei.c:3324 [inline] path_openat+0x15e4/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 ksys_open include/linux/syscalls.h:1279 [inline] __do_sys_creat fs/open.c:1121 [inline] __se_sys_creat fs/open.c:1119 [inline] __x64_sys_creat+0x61/0x80 fs/open.c:1119 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&ovl_i_mutex_dir_key[depth]){++++}: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 down_read+0x8d/0x120 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:767 [inline] lookup_slow+0x49/0x80 fs/namei.c:1687 walk_component+0x92b/0x25b0 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.43+0x212/0xc00 fs/namei.c:2318 filename_lookup+0x26a/0x520 fs/namei.c:2348 kern_path+0x33/0x40 fs/namei.c:2434 create_local_trace_uprobe+0x9b/0x620 kernel/trace/trace_uprobe.c:1377 perf_uprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:316 perf_uprobe_event_init+0x106/0x1a0 kernel/events/core.c:8503 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9770 perf_init_event kernel/events/core.c:9801 [inline] perf_event_alloc.part.94+0x1c91/0x3590 kernel/events/core.c:10074 perf_event_alloc kernel/events/core.c:10430 [inline] __do_sys_perf_event_open+0xa9c/0x2f30 kernel/events/core.c:10531 __se_sys_perf_event_open kernel/events/core.c:10420 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10420 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &ovl_i_mutex_dir_key[depth] --> &p->lock --> &sig->cred_guard_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sig->cred_guard_mutex); lock(&p->lock); lock(&sig->cred_guard_mutex); lock(&ovl_i_mutex_dir_key[depth]); *** DEADLOCK *** 2 locks held by syz-executor0/26058: #0: 00000000a8520e67 (&sig->cred_guard_mutex){+.+.}, at: __do_sys_perf_event_open+0x12fe/0x2f30 kernel/events/core.c:10511 #1: 000000001fccc497 (&pmus_srcu){....}, at: perf_event_alloc.part.94+0x16c0/0x3590 kernel/events/core.c:10070 stack backtrace: CPU: 1 PID: 26058 Comm: syz-executor0 Not tainted 4.20.0-rc7+ #164 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113 print_circular_bug.isra.33.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2347 [inline] __lock_acquire+0x3360/0x4c20 kernel/locking/lockdep.c:3341 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 down_read+0x8d/0x120 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:767 [inline] lookup_slow+0x49/0x80 fs/namei.c:1687 walk_component+0x92b/0x25b0 fs/namei.c:1810 lookup_last fs/namei.c:2273 [inline] path_lookupat.isra.43+0x212/0xc00 fs/namei.c:2318 filename_lookup+0x26a/0x520 fs/namei.c:2348 kern_path+0x33/0x40 fs/namei.c:2434 create_local_trace_uprobe+0x9b/0x620 kernel/trace/trace_uprobe.c:1377 perf_uprobe_init+0x18c/0x280 kernel/trace/trace_event_perf.c:316 perf_uprobe_event_init+0x106/0x1a0 kernel/events/core.c:8503 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9770 perf_init_event kernel/events/core.c:9801 [inline] perf_event_alloc.part.94+0x1c91/0x3590 kernel/events/core.c:10074 perf_event_alloc kernel/events/core.c:10430 [inline] __do_sys_perf_event_open+0xa9c/0x2f30 kernel/events/core.c:10531 __se_sys_perf_event_open kernel/events/core.c:10420 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10420 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa01de30c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00007fa01de316d4 R13: 00000000004c3550 R14: 00000000004d5e20 R15: 00000000ffffffff kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' overlayfs: './file0' not a directory kobject: 'hwsim59' (000000005e0ba21b): kobject_add_internal: parent: 'mac80211_hwsim', set: 'devices' kobject: 'hwsim59' (000000005e0ba21b): kobject_uevent_env kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'hwsim59' (000000005e0ba21b): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59' kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'hwsim59' (000000005e0ba21b): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'hwsim59' (000000005e0ba21b): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'ieee80211' (00000000c871597f): kobject_add_internal: parent: 'hwsim59', set: '(null)' kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'phy59' (0000000021a2829b): kobject_add_internal: parent: 'ieee80211', set: 'devices' kobject: 'phy59' (0000000021a2829b): kobject_uevent_env kobject: 'phy59' (0000000021a2829b): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59/ieee80211/phy59' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'rfkill97' (00000000a909b2d6): kobject_add_internal: parent: 'phy59', set: 'devices' kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'rfkill97' (00000000a909b2d6): kobject_uevent_env kobject: 'rfkill97' (00000000a909b2d6): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59/ieee80211/phy59/rfkill97' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' ieee80211 phy59: Selected rate control algorithm 'minstrel_ht' kobject: 'net' (00000000f387c41b): kobject_add_internal: parent: 'hwsim59', set: '(null)' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'wlan6' (0000000068eac141): kobject_add_internal: parent: 'net', set: 'devices' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'wlan6' (0000000068eac141): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'wlan6' (0000000068eac141): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59/net/wlan6' kobject: 'queues' (000000000f6d3af0): kobject_add_internal: parent: 'wlan6', set: '' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'queues' (000000000f6d3af0): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'queues' (000000000f6d3af0): kobject_uevent_env: filter function caused the event to drop! kobject: 'rx-0' (00000000fadeb3aa): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'rx-0' (00000000fadeb3aa): kobject_uevent_env kobject: 'rx-0' (00000000fadeb3aa): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59/net/wlan6/queues/rx-0' kobject: 'tx-0' (000000006a10e55c): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-0' (000000006a10e55c): kobject_uevent_env kobject: 'tx-0' (000000006a10e55c): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59/net/wlan6/queues/tx-0' kobject: 'tx-1' (000000002c2a800b): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-1' (000000002c2a800b): kobject_uevent_env kobject: 'tx-1' (000000002c2a800b): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59/net/wlan6/queues/tx-1' kobject: 'tx-2' (00000000c8aa0f6b): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-2' (00000000c8aa0f6b): kobject_uevent_env kobject: 'tx-2' (00000000c8aa0f6b): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59/net/wlan6/queues/tx-2' kobject: 'tx-3' (000000001c47ad9d): kobject_add_internal: parent: 'queues', set: 'queues' kobject: 'tx-3' (000000001c47ad9d): kobject_uevent_env kobject: 'tx-3' (000000001c47ad9d): fill_kobj_path: path = '/devices/virtual/mac80211_hwsim/hwsim59/net/wlan6/queues/tx-3' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (00000000b71ab9bc): kobject_uevent_env kobject: 'kvm' (00000000b71ab9bc): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop0' (00000000b6fe1818): kobject_uevent_env kobject: 'loop0' (00000000b6fe1818): fill_kobj_path: path = '/devices/virtual/block/loop0' kobject: 'loop5' (00000000545b3710): kobject_uevent_env kobject: 'loop5' (00000000545b3710): fill_kobj_path: path = '/devices/virtual/block/loop5' syz-executor0 invoked oom-killer: gfp_mask=0x7200c2(GFP_HIGHUSER|__GFP_ACCOUNT), nodemask=(null), order=0, oom_score_adj=1000 kobject: 'loop3' (000000004b315cc2): kobject_uevent_env kobject: 'loop3' (000000004b315cc2): fill_kobj_path: path = '/devices/virtual/block/loop3' syz-executor0 cpuset=syz0 mems_allowed=0 CPU: 1 PID: 26327 Comm: syz-executor0 Not tainted 4.20.0-rc7+ #164 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113 dump_header+0x27b/0xf72 mm/oom_kill.c:441 oom_kill_process.cold.27+0x10/0x903 mm/oom_kill.c:953 out_of_memory+0xa84/0x1430 mm/oom_kill.c:1120 mem_cgroup_out_of_memory+0x15e/0x210 mm/memcontrol.c:1386 mem_cgroup_oom mm/memcontrol.c:1703 [inline] try_charge+0xc44/0x1690 mm/memcontrol.c:2260 memcg_kmem_charge_memcg+0x7c/0x120 mm/memcontrol.c:2568 memcg_kmem_charge+0x13a/0x310 mm/memcontrol.c:2601 __alloc_pages_nodemask+0x75e/0xea0 mm/page_alloc.c:4397 alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2106 alloc_pages include/linux/gfp.h:509 [inline] pipe_write+0x910/0xec0 fs/pipe.c:416 call_write_iter include/linux/fs.h:1857 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x6b8/0x9f0 fs/read_write.c:487 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fa01de30c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 RDX: 000000010000014c RSI: 0000000020000340 RDI: 0000000000000006 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa01de316d4 R13: 00000000004c2dcc R14: 00000000004da398 R15: 00000000ffffffff