ci2 starts bisection 2023-04-06 07:39:32.796021377 +0000 UTC m=+62948.293436577 bisecting fixing commit since c73b4619ad86a2a29fc998e950e98bcdfa2f6d8f building syzkaller on f0036e181e274023235289be91e334cb7507eaa6 ensuring issue is reproducible on original commit c73b4619ad86a2a29fc998e950e98bcdfa2f6d8f testing commit c73b4619ad86a2a29fc998e950e98bcdfa2f6d8f gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 2c80be02be4c496371752141861bd34878091677fe7cc0adda2cf20547b9239a all runs: crashed: general protection fault in __device_attach testing current HEAD 7364b7abbafbeaab61d763c46d84145488b98a3c testing commit 7364b7abbafbeaab61d763c46d84145488b98a3c gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b81b3863db473fb5bb69f8e02247d3fe9670d99028898696a5807bfb52242f74 all runs: crashed: general protection fault in __device_attach revisions tested: 2, total time: 23m12.857395914s (build: 14m56.768216317s, test: 5m53.872262603s) the crash still happens on HEAD commit msg: Merge branch 'android13-5.15' into android13-5.15-lts crash: general protection fault in __device_attach general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7] CPU: 1 PID: 491 Comm: syz-executor.1 Not tainted 5.15.98-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 RIP: 0010:__device_attach+0xad/0x450 drivers/base/dd.c:950 Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 e4 ab f6 fe 4c 8b 3b 49 8d 9f d0 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 11 03 00 00 45 31 f6 f6 03 01 0f 85 b2 RSP: 0018:ffffc90000b07580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff888112dd3a80 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000b07500 RBP: ffffc90000b07658 R08: dffffc0000000000 R09: fffff52000160ea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888110af5030 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007ff25db48700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff25e0f10c0 CR3: 00000001218ba000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: device_attach+0xb/0x10 drivers/base/dd.c:1017 proc_ioctl+0x2f2/0x530 drivers/usb/core/devio.c:2344 usbdev_ioctl+0x2e5b/0x4e80 drivers/usb/core/devio.c:2795 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xc7/0x110 fs/ioctl.c:860 __x64_sys_ioctl+0x76/0x80 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ff25dfd50a9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff25db48168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff25e0f4f80 RCX: 00007ff25dfd50a9 RDX: 0000000020000040 RSI: 00000000c0105512 RDI: 0000000000000003 RBP: 00007ff25e030ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3d21d51f R14: 00007ff25db48300 R15: 0000000000022000 Modules linked in: ---[ end trace 00d510658615ea34 ]--- RIP: 0010:__device_attach+0xad/0x450 drivers/base/dd.c:950 Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 e4 ab f6 fe 4c 8b 3b 49 8d 9f d0 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 11 03 00 00 45 31 f6 f6 03 01 0f 85 b2 RSP: 0018:ffffc90000b07580 EFLAGS: 00010202 RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff888112dd3a80 RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000b07500 RBP: ffffc90000b07658 R08: dffffc0000000000 R09: fffff52000160ea1 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888110af5030 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007ff25db48700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff25db05d38 CR3: 00000001218ba000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 5c pop %rsp 1: 24 68 and $0x68,%al 3: 48 89 d8 mov %rbx,%rax 6: 48 c1 e8 03 shr $0x3,%rax a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) f: 74 08 je 0x19 11: 48 89 df mov %rbx,%rdi 14: e8 e4 ab f6 fe callq 0xfef6abfd 19: 4c 8b 3b mov (%rbx),%r15 1c: 49 8d 9f d0 00 00 00 lea 0xd0(%r15),%rbx 23: 48 89 d8 mov %rbx,%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 11 03 00 00 jne 0x348 37: 45 31 f6 xor %r14d,%r14d 3a: f6 03 01 testb $0x1,(%rbx) 3d: 0f .byte 0xf 3e: 85 .byte 0x85 3f: b2 .byte 0xb2