=====================================================
BUG: KMSAN: uninit-value in netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751
CPU: 1 PID: 27291 Comm: syz-executor.0 Not tainted 5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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
 netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751
 do_xdp_generic net/core/dev.c:4816 [inline]
 __netif_receive_skb_core+0x294a/0x65a0 net/core/dev.c:5207
 __netif_receive_skb_one_core net/core/dev.c:5382 [inline]
 __netif_receive_skb+0xf2/0x640 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
 </IRQ>
 __local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:198
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x4b/0x60 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 bpf_prog_free_id kernel/bpf/syscall.c:1677 [inline]
 __bpf_prog_put kernel/bpf/syscall.c:1717 [inline]
 bpf_prog_put+0x3c3/0x4a0 kernel/bpf/syscall.c:1724
 bpf_prog_release+0x53/0x80 kernel/bpf/syscall.c:1732
 __fput+0x6bd/0xf00 fs/file_table.c:280
 ____fput+0x37/0x40 fs/file_table.c:313
 task_work_run+0x140/0x280 kernel/task_work.c:140
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
 exit_to_user_mode_prepare+0x486/0x560 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x35/0x60 kernel/entry/common.c:301
 __do_fast_syscall_32+0x14f/0x180 arch/x86/entry/common.c:145
 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:168
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:211
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f8b549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000ffc56e90 EFLAGS: 00000282 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 000000000816c000 RDI: 0000000000000000
RBP: 000000000816c000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

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]
 pskb_expand_head+0x25e/0x1e20 net/core/skbuff.c:1676
 netif_receive_generic_xdp+0x61c/0x2590 net/core/dev.c:4699
 do_xdp_generic net/core/dev.c:4816 [inline]
 __netif_receive_skb_core+0x294a/0x65a0 net/core/dev.c:5207
 __netif_receive_skb_one_core net/core/dev.c:5382 [inline]
 __netif_receive_skb+0xf2/0x640 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
=====================================================
------------[ cut here ]------------
Illegal XDP return value 4294967274, expect packet loss!
WARNING: CPU: 1 PID: 27291 at net/core/filter.c:8111 bpf_warn_invalid_xdp_action+0x147/0x150 net/core/filter.c:8109
Modules linked in:
CPU: 1 PID: 27291 Comm: syz-executor.0 Tainted: G    B             5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:bpf_warn_invalid_xdp_action+0x147/0x150 net/core/filter.c:8109
Code: 45 89 bd 50 06 00 00 45 89 a5 70 09 00 00 49 c7 85 80 0c 00 00 00 00 00 00 48 c7 c7 d4 2e 9e 90 44 89 f2 31 c0 e8 09 c5 ef f4 <0f> 0b e9 fa fe ff ff 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53
RSP: 0018:ffff88813fd058d0 EFLAGS: 00010246
RAX: 45f8e3c561b42500 RBX: 00000000ffffff00 RCX: ffff888152915dc0
RDX: 0000000000000101 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88813fd058f8 R08: ffffffff81a4b0aa R09: ffff88813fffa000
R10: 0000000000000003 R11: 00000000ffffffff R12: 00000000054300cc
R13: ffff88813fd27b00 R14: 00000000ffffffea R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88813fd00000(0063) knlGS:000000000a772380
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000002e521000 CR3: 000000012a32d000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 netif_receive_generic_xdp+0x1ed6/0x2590 net/core/dev.c:4768
 do_xdp_generic net/core/dev.c:4816 [inline]
 __netif_receive_skb_core+0x294a/0x65a0 net/core/dev.c:5207
 __netif_receive_skb_one_core net/core/dev.c:5382 [inline]
 __netif_receive_skb+0xf2/0x640 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
 </IRQ>
 __local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:198
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x4b/0x60 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 bpf_prog_free_id kernel/bpf/syscall.c:1677 [inline]
 __bpf_prog_put kernel/bpf/syscall.c:1717 [inline]
 bpf_prog_put+0x3c3/0x4a0 kernel/bpf/syscall.c:1724
 bpf_prog_release+0x53/0x80 kernel/bpf/syscall.c:1732
 __fput+0x6bd/0xf00 fs/file_table.c:280
 ____fput+0x37/0x40 fs/file_table.c:313
 task_work_run+0x140/0x280 kernel/task_work.c:140
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
 exit_to_user_mode_prepare+0x486/0x560 kernel/entry/common.c:208
 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
 syscall_exit_to_user_mode+0x35/0x60 kernel/entry/common.c:301
 __do_fast_syscall_32+0x14f/0x180 arch/x86/entry/common.c:145
 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:168
 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:211
 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f8b549
Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000ffc56e90 EFLAGS: 00000282 ORIG_RAX: 0000000000000006
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 000000000816c000 RDI: 0000000000000000
RBP: 000000000816c000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
---[ end trace ac48291f3d054615 ]---
=====================================================
BUG: KMSAN: uninit-value in netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751
CPU: 1 PID: 17542 Comm: kworker/u4:1 Tainted: G    B   W         5.12.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 __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
 netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751
 do_xdp_generic net/core/dev.c:4816 [inline]
 __netif_receive_skb_core+0x294a/0x65a0 net/core/dev.c:5207
 __netif_receive_skb_one_core net/core/dev.c:5382 [inline]
 __netif_receive_skb+0xf2/0x640 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
 </IRQ>
 __local_bh_enable_ip+0xa1/0xb0 kernel/softirq.c:198
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
 _raw_spin_unlock_bh+0x4b/0x60 kernel/locking/spinlock.c:207
 spin_unlock_bh include/linux/spinlock.h:399 [inline]
 batadv_nc_purge_paths+0x799/0x860 net/batman-adv/network-coding.c:467
 batadv_nc_worker+0x3cd/0x1d20 net/batman-adv/network-coding.c:716
 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
 worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
 kthread+0x521/0x560 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

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]
 pskb_expand_head+0x25e/0x1e20 net/core/skbuff.c:1676
 netif_receive_generic_xdp+0x61c/0x2590 net/core/dev.c:4699
 do_xdp_generic net/core/dev.c:4816 [inline]
 __netif_receive_skb_core+0x294a/0x65a0 net/core/dev.c:5207
 __netif_receive_skb_one_core net/core/dev.c:5382 [inline]
 __netif_receive_skb+0xf2/0x640 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
=====================================================