kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 8987 Comm: syz-executor.4 Not tainted 4.19.90-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kobject: 'loop2' (000000002c053ba3): kobject_uevent_env
RIP: 0010:tcp_splice_read+0x167/0xc30 net/ipv4/tcp.c:799
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: 'loop2' (000000002c053ba3): fill_kobj_path: path = '/devices/virtual/block/loop2'
RSP: 0018:ffff88804f047ba0 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: ffff88804f047cb0 RCX: 1ffff11011f501b6
RDX: 000000000000000f RSI: ffff88808fa80d90 RDI: 0000000000000078
RBP: ffff88804f047cd8 R08: ffff88808fa804c0 R09: ffff88808fa80db0
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a097e100
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88807beed800
FS:  00007f1d1f08b700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000716934 CR3: 00000000a0455000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
 smc_splice_read+0x266/0x390 net/smc/af_smc.c:1855
 sock_splice_read+0xb9/0x100 net/socket.c:859
 do_splice_to+0x127/0x180 fs/splice.c:881
 do_splice+0x1048/0x1340 fs/splice.c:1186
 __do_sys_splice fs/splice.c:1428 [inline]
 __se_sys_splice fs/splice.c:1408 [inline]
 __x64_sys_splice+0x2c6/0x330 fs/splice.c:1408
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a919
Code: ad b6 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 b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f1d1f08ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 000000000045a919
RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 000000000075bf20 R08: 000000000d86dac9 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1d1f08b6d4
R13: 00000000004cb45b R14: 00000000004e3ef0 R15: 00000000ffffffff
Modules linked in:
kobject: 'loop5' (000000006c6ac23c): kobject_uevent_env
kobject: 'loop5' (000000006c6ac23c): fill_kobj_path: path = '/devices/virtual/block/loop5'
kobject: 'loop1' (0000000087807c0c): kobject_uevent_env
kobject: 'loop1' (0000000087807c0c): fill_kobj_path: path = '/devices/virtual/block/loop1'
---[ end trace c1b0b2a6b01db6e8 ]---
kobject: 'loop0' (00000000ea1b8bfa): kobject_uevent_env
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
kobject: 'loop0' (00000000ea1b8bfa): fill_kobj_path: path = '/devices/virtual/block/loop0'
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
kobject: 'loop1' (0000000087807c0c): kobject_uevent_env
RIP: 0010:tcp_splice_read+0x167/0xc30 net/ipv4/tcp.c:799
kobject: 'loop1' (0000000087807c0c): fill_kobj_path: path = '/devices/virtual/block/loop1'
kobject: 'loop5' (000000006c6ac23c): 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
kobject: 'loop5' (000000006c6ac23c): fill_kobj_path: path = '/devices/virtual/block/loop5'
RSP: 0018:ffff88804f047ba0 EFLAGS: 00010206
kobject: 'loop0' (00000000ea1b8bfa): kobject_uevent_env
RAX: dffffc0000000000 RBX: ffff88804f047cb0 RCX: 1ffff11011f501b6
kobject: 'loop0' (00000000ea1b8bfa): fill_kobj_path: path = '/devices/virtual/block/loop0'
kobject: 'loop1' (0000000087807c0c): kobject_uevent_env
RDX: 000000000000000f RSI: ffff88808fa80d90 RDI: 0000000000000078
kobject: 'loop1' (0000000087807c0c): fill_kobj_path: path = '/devices/virtual/block/loop1'
RBP: ffff88804f047cd8 R08: ffff88808fa804c0 R09: ffff88808fa80db0
kobject: 'loop5' (000000006c6ac23c): kobject_uevent_env
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a097e100
kobject: 'loop5' (000000006c6ac23c): fill_kobj_path: path = '/devices/virtual/block/loop5'
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88807beed800
kobject: 'loop2' (000000002c053ba3): kobject_uevent_env
FS:  00007f1d1f08b700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
kobject: 'loop2' (000000002c053ba3): fill_kobj_path: path = '/devices/virtual/block/loop2'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'loop3' (00000000a18b51ea): kobject_uevent_env
CR2: 0000000001508f40 CR3: 00000000a0455000 CR4: 00000000001406f0
kobject: 'loop3' (00000000a18b51ea): fill_kobj_path: path = '/devices/virtual/block/loop3'
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400