ci2 starts bisection 2023-06-20 23:25:29.628825939 +0000 UTC m=+9713.857784185 bisecting fixing commit since 19c0ed55a470d1cd766484abab04871b648560fb building syzkaller on 4bce1a3e705a8b62de8194bdb28f5eef89c8feec ensuring issue is reproducible on original commit 19c0ed55a470d1cd766484abab04871b648560fb testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 6d242ad053dc043ed25cc9d086b6fcc4433c5ee2bc78bee4025811d7086f5489 all runs: crashed: general protection fault in path_openat testing current HEAD 36f4f6fb72d5389535cfd2bdb5a29fefe34e3a21 testing commit 36f4f6fb72d5389535cfd2bdb5a29fefe34e3a21 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 16e5e115b8f936a844f8450e918c7ad92f15767d76aff5b27329c737e9012c79 all runs: crashed: general protection fault in path_openat crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 15m54.595253613s (build: 9m35.074948712s, test: 5m46.182014668s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Merge branch 'android13-5.15' into 'android13-5.15-lts' crash: general protection fault in path_openat general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 372 Comm: syz-executor.0 Not tainted 5.15.106-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline] RIP: 0010:atomic_open fs/namei.c:3271 [inline] RIP: 0010:lookup_open fs/namei.c:3363 [inline] RIP: 0010:open_last_lookups fs/namei.c:3462 [inline] RIP: 0010:path_openat+0x236f/0x4180 fs/namei.c:3669 Code: ff ff 4c 8b 8d a8 fe ff ff 48 c1 e8 03 42 80 3c 20 00 0f 85 b9 10 00 00 48 8b 85 e8 fe ff ff 4c 8b 68 18 4c 89 e8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 35 3c 03 7f 31 4c 89 ef 4c 89 8d a8 fe ff RSP: 0018:ffffc90000717a10 EFLAGS: 00010247 RAX: 0000000000000000 RBX: ffff88811bfa7220 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88810aa297d0 RBP: ffffc90000717bc8 R08: 0000000000000001 R09: ffff88810ba439c4 R10: 0000000000000000 R11: ffff8881f7238220 R12: dffffc0000000000 R13: 0000000000000004 R14: ffffc90000717df0 R15: ffffc90000717c08 FS: 00007f0f201e5700(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055967f3583d0 CR3: 00000001227f3000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_filp_open+0x1ab/0x3f0 fs/namei.c:3699 do_sys_openat2+0x135/0x8e0 fs/open.c:1234 do_sys_open fs/open.c:1250 [inline] __do_sys_openat fs/open.c:1266 [inline] __se_sys_openat fs/open.c:1261 [inline] __x64_sys_openat+0x124/0x200 fs/open.c:1261 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0f20693169 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:00007f0f201e5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f0f207b3050 RCX: 00007f0f20693169 RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f0f206eeca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec17f2b3f R14: 00007f0f201e5300 R15: 0000000000022000 Modules linked in: ---[ end trace 3cf4fa7e36636709 ]--- RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline] RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline] RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline] RIP: 0010:atomic_open fs/namei.c:3271 [inline] RIP: 0010:lookup_open fs/namei.c:3363 [inline] RIP: 0010:open_last_lookups fs/namei.c:3462 [inline] RIP: 0010:path_openat+0x236f/0x4180 fs/namei.c:3669 Code: ff ff 4c 8b 8d a8 fe ff ff 48 c1 e8 03 42 80 3c 20 00 0f 85 b9 10 00 00 48 8b 85 e8 fe ff ff 4c 8b 68 18 4c 89 e8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 74 35 3c 03 7f 31 4c 89 ef 4c 89 8d a8 fe ff RSP: 0018:ffffc90000717a10 EFLAGS: 00010247 RAX: 0000000000000000 RBX: ffff88811bfa7220 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88810aa297d0 RBP: ffffc90000717bc8 R08: 0000000000000001 R09: ffff88810ba439c4 R10: 0000000000000000 R11: ffff8881f7238220 R12: dffffc0000000000 R13: 0000000000000004 R14: ffffc90000717df0 R15: ffffc90000717c08 FS: 00007f0f201e5700(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055967f3583d0 CR3: 00000001227f3000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 4c 8b 8d a8 fe ff ff mov -0x158(%rbp),%r9 7: 48 c1 e8 03 shr $0x3,%rax b: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 10: 0f 85 b9 10 00 00 jne 0x10cf 16: 48 8b 85 e8 fe ff ff mov -0x118(%rbp),%rax 1d: 4c 8b 68 18 mov 0x18(%rax),%r13 21: 4c 89 e8 mov %r13,%rax 24: 48 c1 e8 03 shr $0x3,%rax * 28: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2d: 84 c0 test %al,%al 2f: 74 35 je 0x66 31: 3c 03 cmp $0x3,%al 33: 7f 31 jg 0x66 35: 4c 89 ef mov %r13,%rdi 38: 4c rex.WR 39: 89 .byte 0x89 3a: 8d .byte 0x8d 3b: a8 fe test $0xfe,%al 3d: ff .byte 0xff