===================================================== BUG: KMSAN: uninit-value in netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751 CPU: 0 PID: 30834 Comm: syz-executor.0 Tainted: G W 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 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 __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: 0023:0xf7fe7549 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:00000000fff0e600 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: 0 PID: 30834 at net/core/filter.c:8111 bpf_warn_invalid_xdp_action+0x147/0x150 net/core/filter.c:8109 Modules linked in: CPU: 0 PID: 30834 Comm: syz-executor.0 Tainted: G B W 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:ffff88813fc058d0 EFLAGS: 00010246 RAX: 723c3afc6fcce300 RBX: 00000000ffffff00 RCX: ffff88815dcd1f40 RDX: 0000000000000101 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff88813fc058f8 R08: ffffffff81d175d3 R09: ffff88813fffa000 R10: 0000000000000003 R11: 00000000ffffffff R12: 00000000070900cd R13: ffff88813fc27b00 R14: 00000000ffffffea R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88813fc00000(0063) knlGS:00000000095d5380 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000002e721000 CR3: 0000000165561000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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 __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: 0023:0xf7fe7549 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:00000000fff0e600 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 1abb44d303322855 ]--- ===================================================== BUG: KMSAN: uninit-value in netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751 CPU: 0 PID: 30834 Comm: syz-executor.0 Tainted: G B W 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 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 __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: 0023:0xf7fe7549 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:00000000fff0e600 EFLAGS: 00000282 ORIG_RAX: 0000000000000006 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000002 RDX: 0000000000000000 RSI: 000000000816c000 RDI: 0000000000000003 RBP: 000000000819afc0 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 ===================================================== ===================================================== BUG: KMSAN: uninit-value in netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751 CPU: 0 PID: 30849 Comm: syz-executor.0 Tainted: G B W 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 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 __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: 0023:0xf7fe7549 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:00000000fff0e600 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 ===================================================== ===================================================== BUG: KMSAN: uninit-value in netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751 CPU: 0 PID: 30857 Comm: syz-executor.0 Tainted: G B W 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 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 __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: 0023:0xf7fe7549 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:00000000fff0e600 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 ===================================================== ===================================================== BUG: KMSAN: uninit-value in netif_receive_generic_xdp+0x15c2/0x2590 net/core/dev.c:4751 CPU: 0 PID: 30864 Comm: syz-executor.0 Tainted: G B W 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 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 __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: 0023:0xf7fe7549 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:00000000fff0e600 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 =====================================================