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charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 5be63fc19fca Linux 6.11-rc5 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=150a2d8d980000 kernel config: https://syzkaller.appspot.com/x/.config?x=8605cd35ddc8ff3c dashboard link: https://syzkaller.appspot.com/bug?extid=3d602af7549af539274e compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15d1f76b980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17d49305980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/13cdc3162477/disk-5be63fc1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ea315e9db653/vmlinux-5be63fc1.xz kernel image: https://storage.googleapis.com/syzbot-assets/eb68cddf5620/bzImage-5be63fc1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3d602af7549af539274e@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5237 at net/hsr/hsr_forward.c:602 handle_std_frame net/hsr/hsr_forward.c:602 [inline] WARNING: CPU: 0 PID: 5237 at net/hsr/hsr_forward.c:602 hsr_fill_frame_info+0x3da/0x570 net/hsr/hsr_forward.c:630 Modules linked in: CPU: 0 UID: 0 PID: 5237 Comm: syz-executor387 Not tainted 6.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:handle_std_frame net/hsr/hsr_forward.c:602 [inline] RIP: 0010:hsr_fill_frame_info+0x3da/0x570 net/hsr/hsr_forward.c:630 Code: 00 31 c0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc e8 55 bb fb f5 90 0f 0b 90 e9 09 ff ff ff e8 47 bb fb f5 90 <0f> 0b 90 eb 93 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c a3 fc ff ff 48 RSP: 0018:ffffc90000007278 EFLAGS: 00010246 RAX: ffffffff8b97d2c9 RBX: 0000000000000000 RCX: ffff88807529bc00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88807d910cc0 R08: ffffffff8b97d119 R09: 0000000000000000 R10: ffffc900000073c8 R11: fffff52000000e7b R12: dffffc0000000000 R13: 0000000000000008 R14: ffff888029d04f20 R15: ffffc900000073c0 FS: 0000555564778380(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005633c816f000 CR3: 000000001faac000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fill_frame_info net/hsr/hsr_forward.c:700 [inline] hsr_forward_skb+0x847/0x2b60 net/hsr/hsr_forward.c:715 hsr_handle_frame+0x51b/0x7d0 net/hsr/hsr_slave.c:70 __netif_receive_skb_core+0x13e8/0x4570 net/core/dev.c:5555 __netif_receive_skb_list_core+0x2b7/0x980 net/core/dev.c:5737 __netif_receive_skb_list net/core/dev.c:5804 [inline] netif_receive_skb_list_internal+0xa51/0xe30 net/core/dev.c:5896 gro_normal_list include/net/gro.h:515 [inline] napi_complete_done+0x310/0x8e0 net/core/dev.c:6247 gro_cell_poll+0x19a/0x1c0 net/core/gro_cells.c:66 __napi_poll+0xcb/0x490 net/core/dev.c:6772 napi_poll net/core/dev.c:6841 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6963 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 tun_rx_batched+0x732/0x8f0 tun_get_user+0x2f84/0x4720 drivers/net/tun.c:2006 tun_chr_write_iter+0x113/0x1f0 drivers/net/tun.c:2052 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff04a780a30 Code: 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d 71 d6 07 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89 RSP: 002b:00007ffc50380778 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff04a780a30 RDX: 000000000000006a RSI: 00000000200006c0 RDI: 00000000000000c8 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup