kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9624 Comm: syz-executor0 Not tainted 5.0.0-rc4+ #44 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tcp_splice_read+0x167/0xc30 net/ipv4/tcp.c:799 kobject: 'loop3' (00000000f7edd32f): kobject_uevent_env Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 45 0a 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 18 49 8d 7d 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 3c 09 00 00 45 8b 6d 78 31 ff RSP: 0018:ffff888068637b98 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888068637ca8 RCX: 1ffff110106c3936 RDX: 000000000000000f RSI: ffff88808361c990 RDI: 0000000000000078 kobject: 'loop3' (00000000f7edd32f): fill_kobj_path: path = '/devices/virtual/block/loop3' RBP: ffff888068637cd0 R08: ffff88808361c0c0 R09: ffff88808361c9b0 kobject: 'loop1' (000000003cd0d8ac): kobject_uevent_env R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880671e0340 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a57dd5c0 FS: 00007f8e5ae8a700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 kobject: 'loop1' (000000003cd0d8ac): fill_kobj_path: path = '/devices/virtual/block/loop1' CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000738000 CR3: 000000009556a000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop4' (00000000fbbbb2a7): kobject_uevent_env Call Trace: kobject: 'loop4' (00000000fbbbb2a7): fill_kobj_path: path = '/devices/virtual/block/loop4' smc_splice_read+0x26c/0x390 net/smc/af_smc.c:1856 sock_splice_read+0xc6/0x140 net/socket.c:880 kobject: 'loop3' (00000000f7edd32f): kobject_uevent_env do_splice_to+0x12a/0x190 fs/splice.c:880 do_splice+0xf7c/0x1330 fs/splice.c:1178 kobject: 'loop3' (00000000f7edd32f): fill_kobj_path: path = '/devices/virtual/block/loop3' __do_sys_splice fs/splice.c:1419 [inline] __se_sys_splice fs/splice.c:1399 [inline] __x64_sys_splice+0x2c6/0x330 fs/splice.c:1399 do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 kobject: 'loop4' (00000000fbbbb2a7): kobject_uevent_env entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457e39 kobject: 'loop4' (00000000fbbbb2a7): fill_kobj_path: path = '/devices/virtual/block/loop4' Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8e5ae89c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 kobject: 'loop3' (00000000f7edd32f): kobject_uevent_env RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000457e39 RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 000000000073bf00 R08: 0000000000010008 R09: 0200000000000001 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8e5ae8a6d4 R13: 00000000004c6b98 R14: 00000000004db618 R15: 00000000ffffffff Modules linked in: kobject: 'loop3' (00000000f7edd32f): fill_kobj_path: path = '/devices/virtual/block/loop3' ---[ end trace 4c9d274712279522 ]--- kobject: 'loop5' (000000007bb9f336): kobject_uevent_env RIP: 0010:tcp_splice_read+0x167/0xc30 net/ipv4/tcp.c:799 kobject: 'loop5' (000000007bb9f336): fill_kobj_path: path = '/devices/virtual/block/loop5' Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 45 0a 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b 6d 18 49 8d 7d 78 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 3c 09 00 00 45 8b 6d 78 31 ff kobject: 'loop1' (000000003cd0d8ac): kobject_uevent_env RSP: 0018:ffff888068637b98 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff888068637ca8 RCX: 1ffff110106c3936 kobject: 'loop1' (000000003cd0d8ac): fill_kobj_path: path = '/devices/virtual/block/loop1' RDX: 000000000000000f RSI: ffff88808361c990 RDI: 0000000000000078 RBP: ffff888068637cd0 R08: ffff88808361c0c0 R09: ffff88808361c9b0 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880671e0340 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880a57dd5c0 FS: 00007f8e5ae8a700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc0ac683000 CR3: 000000009556a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400