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Message-ID: <6984bac5.050a0220.3b3015.0028.GAE@google.com> Date: Thu, 05 Feb 2026 07:44:05 -0800 From: syzbot ci <syzbot+cie430046170bd68d4@...kaller.appspotmail.com> To: bpf@...r.kernel.org, davem@...emloft.net, edumazet@...gle.com, horms@...nel.org, kuba@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, yangfeng59949@....com Cc: syzbot@...ts.linux.dev, syzkaller-bugs@...glegroups.com Subject: [syzbot ci] Re: bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap syzbot ci has tested the following series [v2] bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap https://lore.kernel.org/all/20260205092227.126665-1-yangfeng59949@163.com * [PATCH v2] bpf: test_run: Fix the null pointer dereference issue in bpf_lwt_xmit_push_encap and found the following issues: * WARNING in skb_dst_set * general protection fault in percpu_counter_add_batch * general protection fault in tnl_update_pmtu * general protection fault in xfrm_lookup_with_ifid Full report is available here: https://ci.syzbot.org/series/c278e614-0520-4be1-8e1b-b6ed06beb3cd *** WARNING in skb_dst_set tree: bpf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next.git base: 75cd3beb64d0977009e3d1a2d0c03715d3e5e156 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8d5f34b6-d9df-4c4a-9d51-7f4f910f379a/config C repro: https://ci.syzbot.org/findings/9f4f73a7-44d6-4d8b-8fed-818bb8ca054d/c_repro syz repro: https://ci.syzbot.org/findings/9f4f73a7-44d6-4d8b-8fed-818bb8ca054d/syz_repro ------------[ cut here ]------------ (skb->_skb_refdst & ~(1UL)) && !(skb->_skb_refdst & 1UL) WARNING: ./include/linux/skbuff.h:1171 at skb_dst_check_unset include/linux/skbuff.h:1170 [inline], CPU#1: syz.0.17/5978 WARNING: ./include/linux/skbuff.h:1171 at skb_dst_set+0xfd/0x140 include/linux/skbuff.h:1217, CPU#1: syz.0.17/5978 Modules linked in: CPU: 1 UID: 0 PID: 5978 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:skb_dst_check_unset include/linux/skbuff.h:1170 [inline] RIP: 0010:skb_dst_set+0xfd/0x140 include/linux/skbuff.h:1217 Code: 2d 00 00 74 08 4c 89 f7 e8 80 13 98 f8 49 89 1e 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 64 5c 30 f8 90 <0f> 0b 90 e9 6d ff ff ff 44 89 e1 80 e1 07 38 c1 7c 8f be 04 00 00 RSP: 0018:ffffc90005367b58 EFLAGS: 00010293 RAX: ffffffff89923bbc RBX: dffffc0000000001 RCX: ffff8881037d8000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 1ffff1102edaad5b R08: ffffffff8fced777 R09: 1ffffffff1f9daee R10: dffffc0000000000 R11: ffffffff817422b0 R12: 0000000000000000 R13: ffff888176d56b01 R14: ffff888176d56ad8 R15: ffff888176d56a80 FS: 0000555564e8a500(0000) GS:ffff8882a9928000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fe63fff CR3: 000000016852c000 CR4: 00000000000006f0 Call Trace: <TASK> bpf_prog_test_run_skb+0xe46/0x1ea0 net/bpf/test_run.c:1166 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4714 __sys_bpf+0x643/0x950 kernel/bpf/syscall.c:6236 __do_sys_bpf kernel/bpf/syscall.c:6331 [inline] __se_sys_bpf kernel/bpf/syscall.c:6329 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6329 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f51a119acb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3a40e428 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f51a1415fa0 RCX: 00007f51a119acb9 RDX: 0000000000000050 RSI: 00002000000003c0 RDI: 000000000000000a RBP: 00007f51a1208bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f51a1415fac R14: 00007f51a1415fa0 R15: 00007f51a1415fa0 </TASK> *** general protection fault in percpu_counter_add_batch tree: bpf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next.git base: 75cd3beb64d0977009e3d1a2d0c03715d3e5e156 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8d5f34b6-d9df-4c4a-9d51-7f4f910f379a/config C repro: https://ci.syzbot.org/findings/f58ed194-db04-464a-95de-a6d6cc45527a/c_repro syz repro: https://ci.syzbot.org/findings/f58ed194-db04-464a-95de-a6d6cc45527a/syz_repro Oops: general protection fault, probably for non-canonical address 0xdffffc000000001b: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000000d8-0x00000000000000df] CPU: 1 UID: 0 PID: 5976 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:percpu_counter_add_batch+0x3e/0x1d0 lib/percpu_counter.c:98 Code: d4 49 89 f5 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 e6 76 f2 fc 48 89 5c 24 10 4c 8d 73 58 4c 89 f0 48 c1 e8 03 48 89 04 24 <42> 80 3c 38 00 74 08 4c 89 f7 e8 d3 2c 5a fd 49 8b 06 65 8b 28 41 RSP: 0018:ffffc90003b37778 EFLAGS: 00010206 RAX: 000000000000001b RBX: 0000000000000080 RCX: ffff888115b8ba80 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000080 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000766ee4 R12: 0000000000000020 R13: ffffffffffffffff R14: 00000000000000d8 R15: dffffc0000000000 FS: 000055555baf2500(0000) GS:ffff8882a9928000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc74af2e38 CR3: 0000000115cec000 CR4: 00000000000006f0 Call Trace: <TASK> dst_entries_add include/net/dst_ops.h:59 [inline] dst_count_dec net/core/dst.c:162 [inline] dst_release+0x126/0x1b0 net/core/dst.c:176 refdst_drop include/net/dst.h:266 [inline] skb_dst_drop include/net/dst.h:278 [inline] ____bpf_skb_set_tunnel_key net/core/filter.c:4867 [inline] bpf_skb_set_tunnel_key+0x239/0xa30 net/core/filter.c:4835 bpf_prog_adb554717e5d6596+0x4f/0x5c bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline] __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run include/linux/filter.h:730 [inline] bpf_test_run+0x354/0x830 net/bpf/test_run.c:423 bpf_prog_test_run_skb+0xe02/0x1ea0 net/bpf/test_run.c:1164 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4714 __sys_bpf+0x643/0x950 kernel/bpf/syscall.c:6236 __do_sys_bpf kernel/bpf/syscall.c:6331 [inline] __se_sys_bpf kernel/bpf/syscall.c:6329 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6329 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fca1679acb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdef1739c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fca16a15fa0 RCX: 00007fca1679acb9 RDX: 0000000000000050 RSI: 0000200000000d80 RDI: 000000000000000a RBP: 00007fca16808bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fca16a15fac R14: 00007fca16a15fa0 R15: 00007fca16a15fa0 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:percpu_counter_add_batch+0x3e/0x1d0 lib/percpu_counter.c:98 Code: d4 49 89 f5 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 e6 76 f2 fc 48 89 5c 24 10 4c 8d 73 58 4c 89 f0 48 c1 e8 03 48 89 04 24 <42> 80 3c 38 00 74 08 4c 89 f7 e8 d3 2c 5a fd 49 8b 06 65 8b 28 41 RSP: 0018:ffffc90003b37778 EFLAGS: 00010206 RAX: 000000000000001b RBX: 0000000000000080 RCX: ffff888115b8ba80 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000080 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000766ee4 R12: 0000000000000020 R13: ffffffffffffffff R14: 00000000000000d8 R15: dffffc0000000000 FS: 000055555baf2500(0000) GS:ffff8882a9928000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc74af2e38 CR3: 0000000115cec000 CR4: 00000000000006f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 49 89 f5 mov %rsi,%r13 3: 48 89 fb mov %rdi,%rbx 6: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 d: fc ff df 10: e8 e6 76 f2 fc call 0xfcf276fb 15: 48 89 5c 24 10 mov %rbx,0x10(%rsp) 1a: 4c 8d 73 58 lea 0x58(%rbx),%r14 1e: 4c 89 f0 mov %r14,%rax 21: 48 c1 e8 03 shr $0x3,%rax 25: 48 89 04 24 mov %rax,(%rsp) * 29: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 f7 mov %r14,%rdi 33: e8 d3 2c 5a fd call 0xfd5a2d0b 38: 49 8b 06 mov (%r14),%rax 3b: 65 8b 28 mov %gs:(%rax),%ebp 3e: 41 rex.B *** general protection fault in tnl_update_pmtu tree: bpf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next.git base: 75cd3beb64d0977009e3d1a2d0c03715d3e5e156 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8d5f34b6-d9df-4c4a-9d51-7f4f910f379a/config C repro: https://ci.syzbot.org/findings/2b87e46f-6cd5-4189-a1f4-896ea63e96a0/c_repro syz repro: https://ci.syzbot.org/findings/2b87e46f-6cd5-4189-a1f4-896ea63e96a0/syz_repro Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057] CPU: 0 UID: 0 PID: 5994 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:skb_dst_update_pmtu_no_confirm include/net/dst.h:565 [inline] RIP: 0010:tnl_update_pmtu+0x52b/0x1190 net/ipv4/ip_tunnel.c:533 Code: c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 0d 3a 2a f8 4c 8b 3b 49 83 c7 50 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ff e8 e7 39 2a f8 4d 8b 3f 4d 85 ff 8b 5c RSP: 0018:ffffc90004ef6f68 EFLAGS: 00010206 RAX: 000000000000000a RBX: ffffffff9a2dcec8 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff9a2dcec0 RDI: 0000000000000000 RBP: ffffffff9a2dcec0 R08: ffffffff89db11f3 R09: ffffffff8e35a3a0 R10: ffffc90004ef6f20 R11: fffff520009dede6 R12: ffff888112583800 R13: ffff888112583858 R14: 1ffff110224b070b R15: 0000000000000050 FS: 000055557643a500(0000) GS:ffff88818e328000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30363fff CR3: 00000001744e0000 CR4: 00000000000006f0 Call Trace: <TASK> ip_tunnel_xmit+0xd36/0x2430 net/ipv4/ip_tunnel.c:805 __gre_xmit net/ipv4/ip_gre.c:490 [inline] ipgre_xmit+0x8e6/0xc60 net/ipv4/ip_gre.c:694 __netdev_start_xmit include/linux/netdevice.h:5273 [inline] netdev_start_xmit include/linux/netdevice.h:5282 [inline] xmit_one net/core/dev.c:3853 [inline] dev_hard_start_xmit+0x2cd/0x7f0 net/core/dev.c:3869 __dev_queue_xmit+0x14dd/0x32a0 net/core/dev.c:4819 dev_queue_xmit include/linux/netdevice.h:3381 [inline] __bpf_tx_skb+0x18e/0x260 net/core/filter.c:2153 ____bpf_clone_redirect net/core/filter.c:2487 [inline] bpf_clone_redirect+0x313/0x4b0 net/core/filter.c:2450 bpf_prog_885767c90d177146+0x62/0x6b bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline] __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run include/linux/filter.h:730 [inline] bpf_test_run+0x354/0x830 net/bpf/test_run.c:423 bpf_prog_test_run_skb+0xe02/0x1ea0 net/bpf/test_run.c:1164 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4714 __sys_bpf+0x643/0x950 kernel/bpf/syscall.c:6236 __do_sys_bpf kernel/bpf/syscall.c:6331 [inline] __se_sys_bpf kernel/bpf/syscall.c:6329 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6329 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fad0c59acb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe97cab158 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fad0c815fa0 RCX: 00007fad0c59acb9 RDX: 0000000000000028 RSI: 0000200000000080 RDI: 000000000000000a RBP: 00007fad0c608bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fad0c815fac R14: 00007fad0c815fa0 R15: 00007fad0c815fa0 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_dst_update_pmtu_no_confirm include/net/dst.h:565 [inline] RIP: 0010:tnl_update_pmtu+0x52b/0x1190 net/ipv4/ip_tunnel.c:533 Code: c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 0d 3a 2a f8 4c 8b 3b 49 83 c7 50 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ff e8 e7 39 2a f8 4d 8b 3f 4d 85 ff 8b 5c RSP: 0018:ffffc90004ef6f68 EFLAGS: 00010206 RAX: 000000000000000a RBX: ffffffff9a2dcec8 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff9a2dcec0 RDI: 0000000000000000 RBP: ffffffff9a2dcec0 R08: ffffffff89db11f3 R09: ffffffff8e35a3a0 R10: ffffc90004ef6f20 R11: fffff520009dede6 R12: ffff888112583800 R13: ffff888112583858 R14: 1ffff110224b070b R15: 0000000000000050 FS: 000055557643a500(0000) GS:ffff88818e328000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30363fff CR3: 00000001744e0000 CR4: 00000000000006f0 ---------------- Code disassembly (best guess): 0: c1 e8 03 shr $0x3,%eax 3: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 8: 74 08 je 0x12 a: 48 89 df mov %rbx,%rdi d: e8 0d 3a 2a f8 call 0xf82a3a1f 12: 4c 8b 3b mov (%rbx),%r15 15: 49 83 c7 50 add $0x50,%r15 19: 4c 89 f8 mov %r15,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ff mov %r15,%rdi 33: e8 e7 39 2a f8 call 0xf82a3a1f 38: 4d 8b 3f mov (%r15),%r15 3b: 4d 85 ff test %r15,%r15 3e: 8b .byte 0x8b 3f: 5c pop %rsp *** general protection fault in xfrm_lookup_with_ifid tree: bpf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next.git base: 75cd3beb64d0977009e3d1a2d0c03715d3e5e156 arch: amd64 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 config: https://ci.syzbot.org/builds/8d5f34b6-d9df-4c4a-9d51-7f4f910f379a/config C repro: https://ci.syzbot.org/findings/5c4a2d70-b003-439e-8039-496b9009f1e9/c_repro syz repro: https://ci.syzbot.org/findings/5c4a2d70-b003-439e-8039-496b9009f1e9/syz_repro Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5985 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:xfrm_lookup_with_ifid+0xe1/0x1af0 net/xfrm/xfrm_policy.c:3181 Code: 24 20 4d 8d 66 08 4c 89 e0 48 c1 e8 03 4d 89 ee 42 80 3c 28 00 74 08 4c 89 e7 e8 ba 20 17 f8 4d 8b 24 24 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 94 17 00 00 41 0f b7 04 24 89 44 24 28 RSP: 0018:ffffc90003e96fe0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90003e97080 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003e97090 RBP: ffffc90003e970f8 R08: ffffc90003e9708f R09: 0000000000000000 R10: ffffc90003e97080 R11: fffff520007d2e12 R12: 0000000000000000 R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 000055558c0ab500(0000) GS:ffff88818e328000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30363fff CR3: 00000001b9fc8000 CR4: 00000000000006f0 Call Trace: <TASK> xfrm_lookup net/xfrm/xfrm_policy.c:3336 [inline] xfrm_lookup_route+0x3c/0x1c0 net/xfrm/xfrm_policy.c:3347 vti_xmit net/ipv4/ip_vti.c:217 [inline] vti_tunnel_xmit+0x48e/0x18f0 net/ipv4/ip_vti.c:307 __netdev_start_xmit include/linux/netdevice.h:5273 [inline] netdev_start_xmit include/linux/netdevice.h:5282 [inline] xmit_one net/core/dev.c:3853 [inline] dev_hard_start_xmit+0x2cd/0x7f0 net/core/dev.c:3869 __dev_queue_xmit+0x14dd/0x32a0 net/core/dev.c:4819 dev_queue_xmit include/linux/netdevice.h:3381 [inline] __bpf_tx_skb+0x18e/0x260 net/core/filter.c:2153 ____bpf_clone_redirect net/core/filter.c:2487 [inline] bpf_clone_redirect+0x313/0x4b0 net/core/filter.c:2450 bpf_prog_e16758452f539c38+0x5f/0x68 bpf_dispatcher_nop_func include/linux/bpf.h:1402 [inline] __bpf_prog_run include/linux/filter.h:723 [inline] bpf_prog_run include/linux/filter.h:730 [inline] bpf_test_run+0x354/0x830 net/bpf/test_run.c:423 bpf_prog_test_run_skb+0xe02/0x1ea0 net/bpf/test_run.c:1164 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4714 __sys_bpf+0x643/0x950 kernel/bpf/syscall.c:6236 __do_sys_bpf kernel/bpf/syscall.c:6331 [inline] __se_sys_bpf kernel/bpf/syscall.c:6329 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6329 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe30af9acb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffa3d1a918 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fe30b215fa0 RCX: 00007fe30af9acb9 RDX: 000000000000002c RSI: 0000200000000080 RDI: 000000000000000a RBP: 00007fe30b008bf7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe30b215fac R14: 00007fe30b215fa0 R15: 00007fe30b215fa0 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:xfrm_lookup_with_ifid+0xe1/0x1af0 net/xfrm/xfrm_policy.c:3181 Code: 24 20 4d 8d 66 08 4c 89 e0 48 c1 e8 03 4d 89 ee 42 80 3c 28 00 74 08 4c 89 e7 e8 ba 20 17 f8 4d 8b 24 24 4c 89 e0 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 94 17 00 00 41 0f b7 04 24 89 44 24 28 RSP: 0018:ffffc90003e96fe0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffc90003e97080 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90003e97090 RBP: ffffc90003e970f8 R08: ffffc90003e9708f R09: 0000000000000000 R10: ffffc90003e97080 R11: fffff520007d2e12 R12: 0000000000000000 R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 000055558c0ab500(0000) GS:ffff88818e328000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30363fff CR3: 00000001b9fc8000 CR4: 00000000000006f0 ---------------- Code disassembly (best guess): 0: 24 20 and $0x20,%al 2: 4d 8d 66 08 lea 0x8(%r14),%r12 6: 4c 89 e0 mov %r12,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 4d 89 ee mov %r13,%r14 10: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) 15: 74 08 je 0x1f 17: 4c 89 e7 mov %r12,%rdi 1a: e8 ba 20 17 f8 call 0xf81720d9 1f: 4d 8b 24 24 mov (%r12),%r12 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 94 17 00 00 jne 0x17cb 37: 41 0f b7 04 24 movzwl (%r12),%eax 3c: 89 44 24 28 mov %eax,0x28(%rsp) *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@...kaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@...glegroups.com.
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