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 kobject: 'ip6gre0' (000000002faf70a7): kobject_cleanup, parent (null) CPU: 1 PID: 6313 Comm: kworker/1:4 Not tainted 4.20.0-rc2+ #303 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events smc_tcp_listen_work RIP: 0010:kernel_accept+0x5a/0x310 net/socket.c:3245 Code: 48 c1 ea 03 80 3c 02 00 0f 85 4a 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 20 48 8d bb 50 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 02 00 00 48 8d 7b 10 0f b6 kobject: 'ip6gre0' (000000002faf70a7): auto cleanup 'remove' event RSP: 0018:ffff8881960a75b0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11036f14d71 RDX: 000000000000006a RSI: ffffffff8624176f RDI: 0000000000000350 RBP: ffff8881960a75e0 R08: ffff8881b78a6b88 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881b78a62c0 R12: ffff8881960a7690 R13: ffff88818a514140 R14: 0000000000000000 R15: ffff888196982cf8 FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f742750aa8 CR3: 00000001cc1d5000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'loop4' (000000007d989798): kobject_uevent_env DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 kobject: 'loop4' (000000007d989798): fill_kobj_path: path = '/devices/virtual/block/loop4' Call Trace: smc_clcsock_accept net/smc/af_smc.c:834 [inline] smc_tcp_listen_work+0x218/0x11c0 net/smc/af_smc.c:1302 kobject: 'loop3' (000000008cc04bef): kobject_uevent_env process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 kobject: 'ip6gre0' (000000002faf70a7): kobject_uevent_env kobject: 'loop3' (000000008cc04bef): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'ip6gre0' (000000002faf70a7): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'ip6gre0' (000000002faf70a7): calling ktype release worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kobject: 'loop4' (000000007d989798): kobject_uevent_env kobject: 'loop4' (000000007d989798): fill_kobj_path: path = '/devices/virtual/block/loop4' kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: kobject: 'ip6gre0': free name ---[ end trace 664303a02818b9fd ]--- kobject: 'loop3' (000000008cc04bef): kobject_uevent_env kobject: 'loop3' (000000008cc04bef): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'ip6gre0' (00000000cfe43671): kobject_cleanup, parent (null) kobject: 'ip6gre0' (00000000cfe43671): auto cleanup 'remove' event kobject: 'loop4' (000000007d989798): kobject_uevent_env kobject: 'loop4' (000000007d989798): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'ip6gre0' (00000000cfe43671): kobject_uevent_env xt_nfacct: accounting object `syz1' does not exists kobject: 'loop5' (000000003aaea94c): kobject_uevent_env kobject: 'loop5' (000000003aaea94c): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'ip6gre0' (00000000cfe43671): kobject_uevent_env: uevent_suppress caused the event to drop! kobject: 'loop2' (0000000008435803): kobject_uevent_env kobject: 'loop2' (0000000008435803): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'ip6gre0' (00000000cfe43671): calling ktype release RIP: 0010:kernel_accept+0x5a/0x310 net/socket.c:3245 Code: 48 c1 ea 03 80 3c 02 00 0f 85 4a 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5d 20 48 8d bb 50 03 00 00 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 14 02 00 00 48 8d 7b 10 0f b6 kobject: 'ip6gre0': free name kobject: 'loop4' (000000007d989798): kobject_uevent_env kobject: 'loop4' (000000007d989798): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000008435803): kobject_uevent_env kobject: 'loop2' (0000000008435803): fill_kobj_path: path = '/devices/virtual/block/loop2' RSP: 0018:ffff8881960a75b0 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff11036f14d71 kobject: 'loop3' (000000008cc04bef): kobject_uevent_env kobject: 'rx-0' (00000000def0fe3e): kobject_cleanup, parent 000000009bb58999 RDX: 000000000000006a RSI: ffffffff8624176f RDI: 0000000000000350 RBP: ffff8881960a75e0 R08: ffff8881b78a6b88 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881b78a62c0 R12: ffff8881960a7690 R13: ffff88818a514140 R14: 0000000000000000 R15: ffff888196982cf8 FS: 0000000000000000(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 kobject: 'rx-0' (00000000def0fe3e): auto cleanup 'remove' event CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop3' (000000008cc04bef): fill_kobj_path: path = '/devices/virtual/block/loop3' CR2: 00007f5232d88000 CR3: 00000001c31f0000 CR4: 00000000001406e0 kobject: 'rx-0' (00000000def0fe3e): kobject_uevent_env kobject: 'loop0' (0000000019a6847b): kobject_uevent_env kobject: 'rx-0' (00000000def0fe3e): kobject_uevent_env: uevent_suppress caused the event to drop! DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 kobject: 'rx-0' (00000000def0fe3e): auto cleanup kobject_del kobject: 'loop0' (0000000019a6847b): fill_kobj_path: path = '/devices/virtual/block/loop0' DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 xt_nfacct: accounting object `syz1' does not exists kobject: 'loop4' (000000007d989798): kobject_uevent_env kobject: 'rx-0' (00000000def0fe3e): calling ktype release kobject: 'loop4' (000000007d989798): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'rx-0': free name