=====================================================
BUG: KMSAN: uninit-value in ip6_parse_tlv+0xa3b/0xf80 net/ipv6/exthdrs.c:156
CPU: 1 PID: 30513 Comm: syz-executor.5 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197
ip6_parse_tlv+0xa3b/0xf80 net/ipv6/exthdrs.c:156
ipv6_destopt_rcv+0x630/0xe80 net/ipv6/exthdrs.c:308
ip6_protocol_deliver_rcu+0x1402/0x25f0 net/ipv6/ip6_input.c:422
ip6_input_finish net/ipv6/ip6_input.c:463 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip6_input+0x12b/0x390 net/ipv6/ip6_input.c:472
dst_input include/net/dst.h:458 [inline]
ip6_rcv_finish+0x5fc/0x7f0 net/ipv6/ip6_input.c:76
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x1d1/0x460 net/ipv6/ip6_input.c:297
__netif_receive_skb_one_core net/core/dev.c:5384 [inline]
__netif_receive_skb+0x1ec/0x640 net/core/dev.c:5498
process_backlog+0x517/0xbd0 net/core/dev.c:6365
__napi_poll+0x13e/0xca0 net/core/dev.c:6912
napi_poll net/core/dev.c:6979 [inline]
net_rx_action+0x726/0x14a0 net/core/dev.c:7065
__do_softirq+0x1b9/0x715 kernel/softirq.c:345
do_softirq+0x123/0x1c0 kernel/softirq.c:248
__local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:198
local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
rcu_read_unlock_bh include/linux/rcupdate.h:745 [inline]
ip6_finish_output2+0x249c/0x2a40 net/ipv6/ip6_output.c:118
__ip6_finish_output+0xe04/0xee0 net/ipv6/ip6_output.c:182
ip6_finish_output+0x329/0x480 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:290 [inline]
ip6_output+0x4a4/0x7f0 net/ipv6/ip6_output.c:215
dst_output include/net/dst.h:448 [inline]
ip6_local_out+0x17b/0x1e0 net/ipv6/output_core.c:179
ip6_send_skb net/ipv6/ip6_output.c:1904 [inline]
ip6_push_pending_frames+0x243/0x570 net/ipv6/ip6_output.c:1924
rawv6_push_pending_frames net/ipv6/raw.c:613 [inline]
rawv6_sendmsg+0x40f4/0x46b0 net/ipv6/raw.c:956
inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg net/socket.c:674 [inline]
____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2350
___sys_sendmsg net/socket.c:2404 [inline]
__sys_sendmmsg+0xa57/0x1010 net/socket.c:2490
__do_sys_sendmmsg net/socket.c:2519 [inline]
__se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2516
__x64_sys_sendmmsg+0x56/0x70 net/socket.c:2516
do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f4ec76c6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9
RDX: 0000000000000001 RSI: 0000000020000540 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007f4ec76c6300 R15: 0000000000022000
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76
slab_alloc_node mm/slub.c:2922 [inline]
__kmalloc_node_track_caller+0xa4f/0x1470 mm/slub.c:4609
kmalloc_reserve net/core/skbuff.c:353 [inline]
__alloc_skb+0x4dd/0xe90 net/core/skbuff.c:424
alloc_skb include/linux/skbuff.h:1103 [inline]
alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5948
sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2362
sock_alloc_send_skb+0xca/0xe0 net/core/sock.c:2379
__ip6_append_data+0x5336/0x74d0 net/ipv6/ip6_output.c:1621
ip6_append_data+0x44b/0x6e0 net/ipv6/ip6_output.c:1796
rawv6_sendmsg+0x2af4/0x46b0 net/ipv6/raw.c:949
inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg net/socket.c:674 [inline]
____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2350
___sys_sendmsg net/socket.c:2404 [inline]
__sys_sendmmsg+0xa57/0x1010 net/socket.c:2490
__do_sys_sendmmsg net/socket.c:2519 [inline]
__se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2516
__x64_sys_sendmmsg+0x56/0x70 net/socket.c:2516
do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
entry_SYSCALL_64_after_hwframe+0x44/0xae
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip6_parse_tlv+0xa5b/0xf80 net/ipv6/exthdrs.c:162
CPU: 1 PID: 30513 Comm: syz-executor.5 Tainted: G B 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197
ip6_parse_tlv+0xa5b/0xf80 net/ipv6/exthdrs.c:162
ipv6_destopt_rcv+0x630/0xe80 net/ipv6/exthdrs.c:308
ip6_protocol_deliver_rcu+0x1402/0x25f0 net/ipv6/ip6_input.c:422
ip6_input_finish net/ipv6/ip6_input.c:463 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip6_input+0x12b/0x390 net/ipv6/ip6_input.c:472
dst_input include/net/dst.h:458 [inline]
ip6_rcv_finish+0x5fc/0x7f0 net/ipv6/ip6_input.c:76
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x1d1/0x460 net/ipv6/ip6_input.c:297
__netif_receive_skb_one_core net/core/dev.c:5384 [inline]
__netif_receive_skb+0x1ec/0x640 net/core/dev.c:5498
process_backlog+0x517/0xbd0 net/core/dev.c:6365
__napi_poll+0x13e/0xca0 net/core/dev.c:6912
napi_poll net/core/dev.c:6979 [inline]
net_rx_action+0x726/0x14a0 net/core/dev.c:7065
__do_softirq+0x1b9/0x715 kernel/softirq.c:345
do_softirq+0x123/0x1c0 kernel/softirq.c:248
__local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:198
local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
rcu_read_unlock_bh include/linux/rcupdate.h:745 [inline]
ip6_finish_output2+0x249c/0x2a40 net/ipv6/ip6_output.c:118
__ip6_finish_output+0xe04/0xee0 net/ipv6/ip6_output.c:182
ip6_finish_output+0x329/0x480 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:290 [inline]
ip6_output+0x4a4/0x7f0 net/ipv6/ip6_output.c:215
dst_output include/net/dst.h:448 [inline]
ip6_local_out+0x17b/0x1e0 net/ipv6/output_core.c:179
ip6_send_skb net/ipv6/ip6_output.c:1904 [inline]
ip6_push_pending_frames+0x243/0x570 net/ipv6/ip6_output.c:1924
rawv6_push_pending_frames net/ipv6/raw.c:613 [inline]
rawv6_sendmsg+0x40f4/0x46b0 net/ipv6/raw.c:956
inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg net/socket.c:674 [inline]
____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2350
___sys_sendmsg net/socket.c:2404 [inline]
__sys_sendmmsg+0xa57/0x1010 net/socket.c:2490
__do_sys_sendmmsg net/socket.c:2519 [inline]
__se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2516
__x64_sys_sendmmsg+0x56/0x70 net/socket.c:2516
do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f4ec76c6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9
RDX: 0000000000000001 RSI: 0000000020000540 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007f4ec76c6300 R15: 0000000000022000
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76
slab_alloc_node mm/slub.c:2922 [inline]
__kmalloc_node_track_caller+0xa4f/0x1470 mm/slub.c:4609
kmalloc_reserve net/core/skbuff.c:353 [inline]
__alloc_skb+0x4dd/0xe90 net/core/skbuff.c:424
alloc_skb include/linux/skbuff.h:1103 [inline]
alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5948
sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2362
sock_alloc_send_skb+0xca/0xe0 net/core/sock.c:2379
__ip6_append_data+0x5336/0x74d0 net/ipv6/ip6_output.c:1621
ip6_append_data+0x44b/0x6e0 net/ipv6/ip6_output.c:1796
rawv6_sendmsg+0x2af4/0x46b0 net/ipv6/raw.c:949
inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg net/socket.c:674 [inline]
____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2350
___sys_sendmsg net/socket.c:2404 [inline]
__sys_sendmmsg+0xa57/0x1010 net/socket.c:2490
__do_sys_sendmmsg net/socket.c:2519 [inline]
__se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2516
__x64_sys_sendmmsg+0x56/0x70 net/socket.c:2516
do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
entry_SYSCALL_64_after_hwframe+0x44/0xae
=====================================================
=====================================================
BUG: KMSAN: uninit-value in ip6_parse_tlv+0xc61/0xf80 net/ipv6/exthdrs.c:137
CPU: 1 PID: 30513 Comm: syz-executor.5 Tainted: G B 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
__msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197
ip6_parse_tlv+0xc61/0xf80 net/ipv6/exthdrs.c:137
ipv6_destopt_rcv+0x630/0xe80 net/ipv6/exthdrs.c:308
ip6_protocol_deliver_rcu+0x1402/0x25f0 net/ipv6/ip6_input.c:422
ip6_input_finish net/ipv6/ip6_input.c:463 [inline]
NF_HOOK include/linux/netfilter.h:301 [inline]
ip6_input+0x12b/0x390 net/ipv6/ip6_input.c:472
dst_input include/net/dst.h:458 [inline]
ip6_rcv_finish+0x5fc/0x7f0 net/ipv6/ip6_input.c:76
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0x1d1/0x460 net/ipv6/ip6_input.c:297
__netif_receive_skb_one_core net/core/dev.c:5384 [inline]
__netif_receive_skb+0x1ec/0x640 net/core/dev.c:5498
process_backlog+0x517/0xbd0 net/core/dev.c:6365
__napi_poll+0x13e/0xca0 net/core/dev.c:6912
napi_poll net/core/dev.c:6979 [inline]
net_rx_action+0x726/0x14a0 net/core/dev.c:7065
__do_softirq+0x1b9/0x715 kernel/softirq.c:345
do_softirq+0x123/0x1c0 kernel/softirq.c:248
__local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:198
local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
rcu_read_unlock_bh include/linux/rcupdate.h:745 [inline]
ip6_finish_output2+0x249c/0x2a40 net/ipv6/ip6_output.c:118
__ip6_finish_output+0xe04/0xee0 net/ipv6/ip6_output.c:182
ip6_finish_output+0x329/0x480 net/ipv6/ip6_output.c:192
NF_HOOK_COND include/linux/netfilter.h:290 [inline]
ip6_output+0x4a4/0x7f0 net/ipv6/ip6_output.c:215
dst_output include/net/dst.h:448 [inline]
ip6_local_out+0x17b/0x1e0 net/ipv6/output_core.c:179
ip6_send_skb net/ipv6/ip6_output.c:1904 [inline]
ip6_push_pending_frames+0x243/0x570 net/ipv6/ip6_output.c:1924
rawv6_push_pending_frames net/ipv6/raw.c:613 [inline]
rawv6_sendmsg+0x40f4/0x46b0 net/ipv6/raw.c:956
inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg net/socket.c:674 [inline]
____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2350
___sys_sendmsg net/socket.c:2404 [inline]
__sys_sendmmsg+0xa57/0x1010 net/socket.c:2490
__do_sys_sendmmsg net/socket.c:2519 [inline]
__se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2516
__x64_sys_sendmmsg+0x56/0x70 net/socket.c:2516
do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
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:00007f4ec76c6188 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9
RDX: 0000000000000001 RSI: 0000000020000540 RDI: 0000000000000003
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000040 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007f4ec76c6300 R15: 0000000000022000
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:121 [inline]
kmsan_internal_poison_shadow+0x5c/0xf0 mm/kmsan/kmsan.c:104
kmsan_slab_alloc+0x8e/0xe0 mm/kmsan/kmsan_hooks.c:76
slab_alloc_node mm/slub.c:2922 [inline]
__kmalloc_node_track_caller+0xa4f/0x1470 mm/slub.c:4609
kmalloc_reserve net/core/skbuff.c:353 [inline]
__alloc_skb+0x4dd/0xe90 net/core/skbuff.c:424
alloc_skb include/linux/skbuff.h:1103 [inline]
alloc_skb_with_frags+0x1f3/0xc10 net/core/skbuff.c:5948
sock_alloc_send_pskb+0xdc1/0xf90 net/core/sock.c:2362
sock_alloc_send_skb+0xca/0xe0 net/core/sock.c:2379
__ip6_append_data+0x5336/0x74d0 net/ipv6/ip6_output.c:1621
ip6_append_data+0x44b/0x6e0 net/ipv6/ip6_output.c:1796
rawv6_sendmsg+0x2af4/0x46b0 net/ipv6/raw.c:949
inet_sendmsg+0x15b/0x1d0 net/ipv4/af_inet.c:821
sock_sendmsg_nosec net/socket.c:654 [inline]
sock_sendmsg net/socket.c:674 [inline]
____sys_sendmsg+0xcfc/0x12f0 net/socket.c:2350
___sys_sendmsg net/socket.c:2404 [inline]
__sys_sendmmsg+0xa57/0x1010 net/socket.c:2490
__do_sys_sendmmsg net/socket.c:2519 [inline]
__se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2516
__x64_sys_sendmmsg+0x56/0x70 net/socket.c:2516
do_syscall_64+0x9f/0x140 arch/x86/entry/common.c:48
entry_SYSCALL_64_after_hwframe+0x44/0xae
=====================================================