bisecting fixing commit since 54b4fa6d39551639cb10664f6ac78b01993a1d7e building syzkaller on c8d1cc20df5ca5d9ea437054720fa3cfdfa1f578 testing commit 54b4fa6d39551639cb10664f6ac78b01993a1d7e compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 970681ce4846def6f7718137e815cdd76fbead8ea0bc268578c0d5249caf7ffb all runs: crashed: WARNING in kcm_write_msgs testing current HEAD e34184f53363f6bb873c2fe0ce1a08ed7d16e94a testing commit e34184f53363f6bb873c2fe0ce1a08ed7d16e94a compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 2926378d75a4ebf2d75c0d452abb6a34b9eab519083295ae674739bd2e9d60f9 run #0: crashed: WARNING in kcm_write_msgs run #1: crashed: WARNING in kcm_write_msgs run #2: crashed: WARNING in kcm_write_msgs run #3: crashed: WARNING in kcm_write_msgs run #4: crashed: WARNING in kcm_write_msgs run #5: crashed: WARNING in kcm_write_msgs run #6: crashed: WARNING in kcm_write_msgs run #7: crashed: WARNING in kcm_write_msgs run #8: crashed: WARNING in corrupted run #9: crashed: WARNING in kcm_write_msgs revisions tested: 2, total time: 29m23.44253766s (build: 21m37.119075648s, test: 6m30.408732809s) the crash still happens on HEAD commit msg: Linux 4.19.210 crash: WARNING in kcm_write_msgs batman_adv: batadv0: Interface activated: batadv_slave_1 IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7399 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 0 PID: 7399 Comm: syz-executor.0 Not tainted 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881d87078f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881d6ccb0c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881d87079b8 R08: ffffed103ed05089 R09: ffffed103ed05088 R10: ffffed103ed05088 R11: ffff8881f6828447 R12: 00000000000000c0 R13: ffff8881d759ad00 R14: ffff8881d6d15c80 R15: ffff8881d6ccb000 FS: 00007f7bbda6e700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200d5000 CR3: 00000001d9186004 CR4: 00000000003606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f7bbda6e198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f7bbda6e6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 5826 hardirqs last enabled at (5825): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (5825): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (5826): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (5820): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (5721): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (5721): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 4dbb29b109935782 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7428 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 1 PID: 7428 Comm: syz-executor.1 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 KCM: Hard failure on kcm_write_msgs Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881ddef78f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881d61ad380 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881ddef79b8 R08: ffffed103ed25089 R09: ffffed103ed25088 R10: ffffed103ed25088 R11: ffff8881f6928447 R12: 00000000000000c0 R13: ffff8881cd8b7980 R14: ffff8881d83c7480 R15: ffff8881d61ad2c0 FS: 00007f1334d9c700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002940 CR3: 00000001d6691006 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f1334d9c198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f1334d9c6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 6870 hardirqs last enabled at (6869): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (6869): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (6870): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (6864): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (6837): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (6837): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 4dbb29b109935783 ]--- KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7462 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 0 PID: 7462 Comm: syz-executor.4 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881d60478f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881d5b92180 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881d60479b8 R08: ffffed103ed05089 R09: ffffed103ed05088 R10: ffffed103ed05088 R11: ffff8881f6828447 R12: 00000000000000c0 R13: ffff8881d5d02c80 R14: ffff8881d6d14c00 R15: ffff8881d5b920c0 FS: 00007f3fe4b4d700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000050e3b4 CR3: 00000001d73ab002 CR4: 00000000003606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f3fe4b4d198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f3fe4b4d6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 6448 hardirqs last enabled at (6447): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (6447): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (6448): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (6442): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (6337): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (6337): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 4dbb29b109935784 ]--- ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7506 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 1 PID: 7506 Comm: syz-executor.5 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881e3f6f8f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881eea35b00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881e3f6f9b8 R08: ffffed103ed25089 R09: ffffed103ed25088 R10: ffffed103ed25088 R11: ffff8881f6928447 R12: 00000000000000c0 R13: ffff8881cf4a2cc0 R14: ffff8881f4f95a40 R15: ffff8881eea35a40 FS: 00007ff556af4700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002940 CR3: 00000001eee35001 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007ff556af4198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007ff556af46bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 10570 hardirqs last enabled at (10569): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (10569): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (10570): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (10556): [] spin_unlock_bh include/linux/spinlock.h:374 [inline] softirqs last enabled at (10556): [] release_sock+0x11f/0x180 net/core/sock.c:2912 softirqs last disabled at (10554): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (10554): [] release_sock+0x1b/0x180 net/core/sock.c:2899 ---[ end trace 4dbb29b109935785 ]--- KCM: Hard failure on kcm_write_msgs KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7558 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 1 PID: 7558 Comm: syz-executor.0 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881e79ef8f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881f4202400 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881e79ef9b8 R08: ffffed103ed25089 R09: ffffed103ed25088 R10: ffffed103ed25088 R11: ffff8881f6928447 R12: 00000000000000c0 R13: ffff8881d66ee640 R14: ffff8881f4f949c0 R15: ffff8881f4202340 FS: 00007f7bbda6e700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000202bf000 CR3: 00000001ea3d4002 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f7bbda6e198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f7bbda6e6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 8254 hardirqs last enabled at (8253): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (8253): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (8254): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (8248): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (8227): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (8227): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 4dbb29b109935786 ]--- KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7673 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 1 PID: 7673 Comm: syz-executor.0 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881cde5f8f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881e9d75600 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881cde5f9b8 R08: ffffed103ed25089 R09: ffffed103ed25088 R10: ffffed103ed25088 R11: ffff8881f6928447 R12: 00000000000000c0 R13: ffff8881d23a8d00 R14: ffff8881d5c6c880 R15: ffff8881e9d75540 FS: 00007f7bbda6e700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000380 CR3: 00000001d8383001 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f7bbda6e198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f7bbda6e6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 6168 hardirqs last enabled at (6167): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (6167): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (6168): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (6162): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (6075): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (6075): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 4dbb29b109935787 ]--- KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7798 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 0 PID: 7798 Comm: syz-executor.1 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881cdc6f8f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881dbf96ac0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881cdc6f9b8 R08: ffffed103ed05089 R09: ffffed103ed05088 R10: ffffed103ed05088 R11: ffff8881f6828447 R12: 00000000000000c0 R13: ffff8881e8c0ecc0 R14: ffff8881f2ce7180 R15: ffff8881dbf96a00 FS: 00007f1334d9c700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe34687708 CR3: 00000001daf0c006 CR4: 00000000003606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f1334d9c198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f1334d9c6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 5692 hardirqs last enabled at (5691): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (5691): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (5692): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (5676): [] spin_unlock_bh include/linux/spinlock.h:374 [inline] softirqs last enabled at (5676): [] release_sock+0x11f/0x180 net/core/sock.c:2912 softirqs last disabled at (5672): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (5672): [] release_sock+0x1b/0x180 net/core/sock.c:2899 ---[ end trace 4dbb29b109935788 ]--- KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 1 PID: 7821 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 1 PID: 7821 Comm: syz-executor.4 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881dd5178f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881e5ec38c0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881dd5179b8 R08: ffffed103ed25089 R09: ffffed103ed25088 R10: ffffed103ed25088 R11: ffff8881f6928447 R12: 00000000000000c0 R13: ffff8881e8896cc0 R14: ffff8881cda01cc0 R15: ffff8881e5ec3800 FS: 00007f3fe4b4d700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000202bf002 CR3: 00000001d5d98005 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f3fe4b4d198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f3fe4b4d6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 4004 hardirqs last enabled at (4003): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (4003): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (4004): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3990): [] spin_unlock_bh include/linux/spinlock.h:374 [inline] softirqs last enabled at (3990): [] release_sock+0x11f/0x180 net/core/sock.c:2912 softirqs last disabled at (3988): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (3988): [] release_sock+0x1b/0x180 net/core/sock.c:2899 ---[ end trace 4dbb29b109935789 ]--- KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 0 PID: 7935 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 0 PID: 7935 Comm: syz-executor.5 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881c33b78f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881e00c3840 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881c33b79b8 R08: ffffed103ed05089 R09: ffffed103ed05088 R10: ffffed103ed05088 R11: ffff8881f6828447 R12: 00000000000000c0 R13: ffff8881d0b08d00 R14: ffff8881e0c55200 R15: ffff8881e00c3780 FS: 00007ff556af4700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002940 CR3: 00000001e0cb7001 CR4: 00000000003606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007ff556af4198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007ff556af46bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 6380 hardirqs last enabled at (6379): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (6379): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (6380): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (6374): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (6317): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (6317): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 4dbb29b10993578a ]--- KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8005 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 0 PID: 8005 Comm: syz-executor.0 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881d285f8f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881de241900 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881d285f9b8 R08: ffffed103ed05089 R09: ffffed103ed05088 R10: ffffed103ed05088 R11: ffff8881f6828447 R12: 00000000000000c0 R13: ffff8881e0e13340 R14: ffff8881c5b96840 R15: ffff8881de241840 FS: 00007f7bbda6e700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffdd3f090c8 CR3: 00000001ddd8b004 CR4: 00000000003606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f7bbda6e198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f7bbda6e6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 5754 hardirqs last enabled at (5753): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (5753): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (5754): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (5738): [] spin_unlock_bh include/linux/spinlock.h:374 [inline] softirqs last enabled at (5738): [] release_sock+0x11f/0x180 net/core/sock.c:2912 softirqs last disabled at (5736): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (5736): [] release_sock+0x1b/0x180 net/core/sock.c:2899 ---[ end trace 4dbb29b10993578b ]--- WARNING: CPU: 0 PID: 8018 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 0 PID: 8018 Comm: syz-executor.5 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881c5b9f8f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881de241b80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881c5b9f9b8 R08: ffffed103ed05089 R09: ffffed103ed05088 R10: ffffed103ed05088 R11: ffff8881f6828447 R12: 00000000000000c0 R13: ffff8881e0e12d00 R14: ffff8881e0c54440 R15: ffff8881de241ac0 FS: 00007ff556ad3700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe34687708 CR3: 00000001dec0b001 CR4: 00000000003606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007ff556ad3198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bfa0 R13: 00007ff556ad36bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 3134 hardirqs last enabled at (3133): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (3133): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (3134): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (3116): [] spin_unlock_bh include/linux/spinlock.h:374 [inline] softirqs last enabled at (3116): [] release_sock+0x11f/0x180 net/core/sock.c:2912 softirqs last disabled at (3114): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (3114): [] release_sock+0x1b/0x180 net/core/sock.c:2899 ---[ end trace 4dbb29b10993578c ]--- KCM: Hard failure on kcm_write_msgs KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 1 PID: 8054 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 1 PID: 8054 Comm: syz-executor.0 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881c16a78f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881e8415dc0 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881c16a79b8 R08: ffffed103ed25089 R09: ffffed103ed25088 R10: ffffed103ed25088 R11: ffff8881f6928447 R12: 00000000000000c0 R13: ffff8881e0005300 R14: ffff8881d1621380 R15: ffff8881e8415d00 FS: 00007f7bbda6e700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000202bf002 CR3: 00000001dcde5006 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007f7bbda6e198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007f7bbda6e6bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 7602 hardirqs last enabled at (7601): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (7601): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (7602): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (7586): [] spin_unlock_bh include/linux/spinlock.h:374 [inline] softirqs last enabled at (7586): [] release_sock+0x11f/0x180 net/core/sock.c:2912 softirqs last disabled at (7584): [] spin_lock_bh include/linux/spinlock.h:334 [inline] softirqs last disabled at (7584): [] release_sock+0x1b/0x180 net/core/sock.c:2899 ---[ end trace 4dbb29b10993578d ]--- KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8138 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 0 PID: 8138 Comm: syz-executor.2 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881dba278f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881da4e4180 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881dba279b8 R08: ffffed103ed05089 R09: ffffed103ed05088 R10: ffffed103ed05088 R11: ffff8881f6828447 R12: 00000000000000c0 R13: ffff8881da3c52c0 R14: ffff8881dae7f680 R15: ffff8881da4e40c0 FS: 00007ffa2d636700(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7bbda2c718 CR3: 00000001e23e8001 CR4: 00000000003606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007ffa2d636198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007ffa2d6366bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 8904 hardirqs last enabled at (8903): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (8903): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (8904): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (8898): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (8855): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (8855): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 4dbb29b10993578e ]--- KCM: Hard failure on kcm_write_msgs ------------[ cut here ]------------ WARNING: CPU: 1 PID: 8164 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 1 PID: 8164 Comm: syz-executor.5 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881dda178f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881dae6d340 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8767b5c0 RDI: ffffffff8a1899a0 RBP: ffff8881dda179b8 R08: ffffed103ed25089 R09: ffffed103ed25088 R10: ffffed103ed25088 R11: ffff8881f6928447 R12: 00000000000000c0 R13: ffff8881d8f8c040 R14: ffff8881dae7eb80 R15: ffff8881dae6d280 FS: 00007ff556af4700(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000202bf000 CR3: 00000001de2fe003 CR4: 00000000003606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcm_sendmsg+0x18c2/0x25f0 net/kcm/kcmsock.c:1035 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xb5/0xf0 net/socket.c:661 sock_write_iter+0x215/0x420 net/socket.c:966 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x443/0x890 fs/read_write.c:487 vfs_write+0x150/0x4d0 fs/read_write.c:549 ksys_write+0x103/0x260 fs/read_write.c:599 __do_sys_write fs/read_write.c:611 [inline] __se_sys_write fs/read_write.c:608 [inline] __x64_sys_write+0x6e/0xb0 fs/read_write.c:608 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4641a9 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:00007ff556af4198 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000c4c RCX: 00000000004641a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000053bf00 R13: 00007ff556af46bc R14: 00000000ffffffff R15: 0000000000000003 irq event stamp: 8286 hardirqs last enabled at (8285): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (8285): [] _raw_spin_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:192 hardirqs last disabled at (8286): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (8280): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (8179): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (8179): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 4dbb29b10993578f ]--- ------------[ cut here ]------------ KCM: Hard failure on kcm_write_msgs WARNING: CPU: 1 PID: 8203 at net/kcm/kcmsock.c:629 kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Modules linked in: CPU: 1 PID: 8203 Comm: syz-executor.4 Tainted: G W 4.19.210-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kcm_write_msgs.cold.33+0x5f/0x13e net/kcm/kcmsock.c:629 Code: c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 0a 2e ec ff 0f 0b 4c 8b 5d d0 e9 7c 92 5f ff 48 c7 c7 a0 d5 d0 87 4c 89 5d d0 e8 ef 2d ec ff <0f> 0b 8b 85 7c ff ff ff ba ea ff ff ff 4c 8b 5d d0 89 45 c4 e9 d6 RSP: 0018:ffff8881e2a2f8f8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8881d6c1be00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8a1899a0 RBP: ffff8881e2a2f9b8 R08: ffffed103ed23eeb R09: ffffed103ed23eea R10: ffffed103ed23eea R11: ffff8881f691f757 R12: 00000000000000c0