RDX: 00000000000000d3 RSI: 0000000000000029 RDI: 0000000000000004 RBP: 00000000009300a0 R08: 000000000000005c R09: 0000000000000000 R10: 0000000020ee5000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004d5800 R14: 00000000004c0668 R15: 0000000000000000 kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 20126 Comm: syz-executor5 Not tainted 4.19.0-rc2+ #211 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rhashtable_walk_start_check+0xd3/0x13d0 lib/rhashtable.c:717 Code: f2 c7 40 30 f2 f2 f2 f2 c7 40 34 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 64 f3 ef fd 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 0f 85 74 0f 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b RSP: 0018:ffff88019e45eee8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffc90001e48000 RDX: 00000000000007a3 RSI: ffffffff838edbcc RDI: 0000000000000000 RBP: ffff88019e45f130 R08: ffff8801978ca0c0 R09: ffffed003496ef2c R10: ffffed003496ef2c R11: ffff8801a4b77963 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88019e45f270 R15: fffffffffffff000 FS: 00007f02af0d0700(0000) GS:ffff8801dac00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f543111adb8 CR3: 00000001ce5ed000 CR4: 00000000001406f0 Call Trace: rhashtable_walk_start include/linux/rhashtable.h:244 [inline] tipc_nl_sk_walk+0x52/0x1d0 net/tipc/socket.c:3236 tipc_nl_sk_dump+0x24/0x30 net/tipc/socket.c:3366 __tipc_nl_compat_dumpit.isra.11+0x20b/0xad0 net/tipc/netlink_compat.c:192 tipc_nl_compat_dumpit+0x1f4/0x440 net/tipc/netlink_compat.c:265 tipc_nl_compat_handle net/tipc/netlink_compat.c:1142 [inline] tipc_nl_compat_recv+0x12b3/0x19a0 net/tipc/netlink_compat.c:1205 genl_family_rcv_msg+0x8a9/0x1140 net/netlink/genetlink.c:601 genl_rcv_msg+0xc6/0x168 net/netlink/genetlink.c:626 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2452 genl_rcv+0x28/0x40 net/netlink/genetlink.c:637 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline] netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1341 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1906 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:631 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2114 __sys_sendmsg+0x11d/0x280 net/socket.c:2152 __do_sys_sendmsg net/socket.c:2161 [inline] __se_sys_sendmsg net/socket.c:2159 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2159 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4572a9 Code: fd b4 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 b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f02af0cfc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f02af0d06d4 RCX: 00000000004572a9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d4e40 R14: 00000000004c9389 R15: 0000000000000000 Modules linked in: ---[ end trace 980cdf7e224e6843 ]--- RIP: 0010:rhashtable_walk_start_check+0xd3/0x13d0 lib/rhashtable.c:717 kobject: 'loop3' (0000000081ed8072): kobject_uevent_env kobject: 'loop3' (0000000081ed8072): fill_kobj_path: path = '/devices/virtual/block/loop3' Code: f2 c7 40 30 f2 f2 f2 f2 c7 40 34 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 64 f3 ef fd 4c 89 e8 48 c1 e8 03 <80> 3c 18 00 0f 85 74 0f 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 kobject: 'loop4' (000000008f2f02ba): kobject_uevent_env kobject: 'loop4' (000000008f2f02ba): fill_kobj_path: path = '/devices/virtual/block/loop4' CPU: 0 PID: 20139 Comm: syz-executor1 Tainted: G D 4.19.0-rc2+ #211 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'loop1' (000000007b162e19): kobject_uevent_env Call Trace: kobject: 'loop1' (000000007b162e19): fill_kobj_path: path = '/devices/virtual/block/loop1' __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 kobject: 'loop2' (00000000d81a88aa): kobject_uevent_env fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 kobject: 'loop2' (00000000d81a88aa): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop0' (00000000215c3089): kobject_uevent_env kobject: 'loop0' (00000000215c3089): fill_kobj_path: path = '/devices/virtual/block/loop0' RSP: 0018:ffff88019e45eee8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffc90001e48000 RDX: 00000000000007a3 RSI: ffffffff838edbcc RDI: 0000000000000000 RBP: ffff88019e45f130 R08: ffff8801978ca0c0 R09: ffffed003496ef2c R10: ffffed003496ef2c R11: ffff8801a4b77963 R12: 0000000000000000 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 R13: 0000000000000000 R14: ffff88019e45f270 R15: fffffffffffff000 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x5a/0x740 mm/slab.c:3661 FS: 00007f02af0d0700(0000) GS:ffff8801dad00000(0000) knlGS:0000000000000000 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 __alloc_skb+0x155/0x770 net/core/skbuff.c:205 CR2: 00007fff9b2cc6b8 CR3: 00000001ce5ed000 CR4: 00000000001406e0 alloc_skb include/linux/skbuff.h:995 [inline] nlmsg_new include/net/netlink.h:511 [inline] mr6_netlink_event+0xdf/0x1a0 net/ipv6/ip6mr.c:2351