RAX: ffffffffffffffda RBX: 00007f5aae626180 RCX: 00007f5aae39e159 RDX: 0000000000000001 RSI: 0000200000000300 RDI: 0000000000000007 RBP: 00007f5aaf2b8090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f5aae626218 R14: 00007f5aae626180 R15: 00007ffdde68d018 ---[ end trace 0000000000000000 ]--- general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7] CPU: 0 PID: 1243 Comm: syz.1.228 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__device_attach+0xae/0x420 drivers/base/dd.c:1014 Code: 8d 66 68 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 54 15 d2 fe 4d 8b 2c 24 4d 8d a5 d0 00 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 3a 03 00 00 41 0f b6 1c 24 89 de 83 e6 01 RSP: 0018:ffffc9000295f9e0 EFLAGS: 00010202 RAX: 000000000000001a RBX: dffffc0000000000 RCX: ffffffff85009323 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc9000295f960 RBP: ffffc9000295fa90 R08: ffffc9000295f967 R09: 1ffff9200052bf2c R10: dffffc0000000000 R11: fffff5200052bf2d R12: 00000000000000d0 R13: 0000000000000000 R14: ffff8881094dc0d0 R15: 0000000000000000 FS: 00007f5aaf2b86c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae0d5d5ff8 CR3: 0000000131573000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_attach+0x17/0x20 drivers/base/dd.c:1081 pci_bus_add_device+0x7a/0x110 drivers/pci/bus.c:345 pci_bus_add_devices+0x94/0x1c0 drivers/pci/bus.c:368 pci_rescan_bus+0x2c/0x40 drivers/pci/probe.c:3337 rescan_store+0xc9/0x150 drivers/pci/pci-sysfs.c:465 bus_attr_store+0x88/0xb0 drivers/base/bus.c:124 sysfs_kf_write+0x137/0x150 fs/sysfs/file.c:136 kernfs_fop_write_iter+0x307/0x470 fs/kernfs/file.c:352 call_write_iter include/linux/fs.h:2282 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x5ef/0xd00 fs/read_write.c:584 ksys_write+0x14a/0x260 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:646 x64_sys_call+0x27b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5aae39e159 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:00007f5aaf2b8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f5aae626180 RCX: 00007f5aae39e159 RDX: 0000000000000001 RSI: 0000200000000300 RDI: 0000000000000007 RBP: 00007f5aaf2b8090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f5aae626218 R14: 00007f5aae626180 R15: 00007ffdde68d018 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__device_attach+0xae/0x420 drivers/base/dd.c:1014 Code: 8d 66 68 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 54 15 d2 fe 4d 8b 2c 24 4d 8d a5 d0 00 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 3a 03 00 00 41 0f b6 1c 24 89 de 83 e6 01 RSP: 0018:ffffc9000295f9e0 EFLAGS: 00010202 RAX: 000000000000001a RBX: dffffc0000000000 RCX: ffffffff85009323 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc9000295f960 RBP: ffffc9000295fa90 R08: ffffc9000295f967 R09: 1ffff9200052bf2c R10: dffffc0000000000 R11: fffff5200052bf2d R12: 00000000000000d0 R13: 0000000000000000 R14: ffff8881094dc0d0 R15: 0000000000000000 FS: 00007f5aaf2b86c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae0d5d5ff8 CR3: 0000000131573000 CR4: 00000000003526b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8d 66 68 lea 0x68(%rsi),%esp 3: 4c 89 e0 mov %r12,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) e: 74 08 je 0x18 10: 4c 89 e7 mov %r12,%rdi 13: e8 54 15 d2 fe call 0xfed2156c 18: 4d 8b 2c 24 mov (%r12),%r13 1c: 4d 8d a5 d0 00 00 00 lea 0xd0(%r13),%r12 23: 4c 89 e0 mov %r12,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 3a 03 00 00 jne 0x370 36: 41 0f b6 1c 24 movzbl (%r12),%ebx 3b: 89 de mov %ebx,%esi 3d: 83 e6 01 and $0x1,%esi