Oops: general protection fault, probably for non-canonical address 0xfbd5a5d5a0000000: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xdead4ead00000000-0xdead4ead00000007] CPU: 1 UID: 0 PID: 3195 Comm: kworker/1:2 Not tainted 6.16.0-rc5-syzkaller-00182-g7727ec1523d7 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_long br_fdb_cleanup RIP: 0010:netif_is_bridge_port include/linux/netdevice.h:5412 [inline] RIP: 0010:br_port_get_rtnl_rcu net/bridge/br_private.h:465 [inline] RIP: 0010:br_switchdev_event+0x47/0x530 net/bridge/br.c:166 Code: 00 00 fc ff df e8 79 04 7a f7 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 13 87 dd f7 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 fa 86 dd f7 49 8b 2e 48 89 ee 48 RSP: 0018:ffffc9000c11f6a0 EFLAGS: 00010a06 RAX: 1bd5a9d5a0000000 RBX: ffffc9000c11f7e0 RCX: ffff8880301a8000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8f64e040 RBP: 00000000ffffffff R08: ffffffff8fa1f3f7 R09: 1ffffffff1f43e7e R10: dffffc0000000000 R11: ffffffff8a4631d0 R12: 0000000000000004 R13: 0000000000000000 R14: dead4ead00000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000ffd000 CR3: 000000005365a000 CR4: 00000000003526f0 Call Trace: notifier_call_chain+0x1b3/0x3e0 kernel/notifier.c:85 atomic_notifier_call_chain+0xda/0x180 kernel/notifier.c:223 br_switchdev_fdb_notify+0x361/0x3e0 net/bridge/br_switchdev.c:-1 fdb_notify+0x89/0x160 net/bridge/br_fdb.c:186 fdb_delete+0xec4/0x1160 net/bridge/br_fdb.c:324 br_fdb_cleanup+0x2aa/0x4d0 net/bridge/br_fdb.c:568 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:netif_is_bridge_port include/linux/netdevice.h:5412 [inline] RIP: 0010:br_port_get_rtnl_rcu net/bridge/br_private.h:465 [inline] RIP: 0010:br_switchdev_event+0x47/0x530 net/bridge/br.c:166 Code: 00 00 fc ff df e8 79 04 7a f7 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 13 87 dd f7 4c 8b 33 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 fa 86 dd f7 49 8b 2e 48 89 ee 48 RSP: 0018:ffffc9000c11f6a0 EFLAGS: 00010a06 RAX: 1bd5a9d5a0000000 RBX: ffffc9000c11f7e0 RCX: ffff8880301a8000 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8f64e040 RBP: 00000000ffffffff R08: ffffffff8fa1f3f7 R09: 1ffffffff1f43e7e R10: dffffc0000000000 R11: ffffffff8a4631d0 R12: 0000000000000004 R13: 0000000000000000 R14: dead4ead00000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000ffd000 CR3: 000000005365a000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: df e8 fucomip %st(0),%st 2: 79 04 jns 0x8 4: 7a f7 jp 0xfffffffd 6: 48 89 d8 mov %rbx,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 12: 74 08 je 0x1c 14: 48 89 df mov %rbx,%rdi 17: e8 13 87 dd f7 call 0xf7dd872f 1c: 4c 8b 33 mov (%rbx),%r14 1f: 4c 89 f0 mov %r14,%rax 22: 48 c1 e8 03 shr $0x3,%rax * 26: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2b: 74 08 je 0x35 2d: 4c 89 f7 mov %r14,%rdi 30: e8 fa 86 dd f7 call 0xf7dd872f 35: 49 8b 2e mov (%r14),%rbp 38: 48 89 ee mov %rbp,%rsi 3b: 48 rex.W