ci2 starts bisection 2023-06-05 04:43:58.880095262 +0000 UTC m=+287662.527002922 bisecting fixing commit since 6d40cb68a6574b87010d46930eb0c2f830835cc2 building syzkaller on 62df2017e3b1edd786a4c737bd4ccba2b4581d88 ensuring issue is reproducible on original commit 6d40cb68a6574b87010d46930eb0c2f830835cc2 testing commit 6d40cb68a6574b87010d46930eb0c2f830835cc2 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f4db811fcc2efd5b258b0708fb7cdb8fce77131ccfa0bd36dbd574e5556854fa all runs: crashed: general protection fault in filename_create testing current HEAD 19c0ed55a470d1cd766484abab04871b648560fb testing commit 19c0ed55a470d1cd766484abab04871b648560fb gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 046a5942bf965e0cf848b0f2a6197320d58ccf59f76bccd28b3aad714e3705fc all runs: crashed: general protection fault in filename_create crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 20m36.481477037s (build: 13m59.29511296s, test: 6m5.070879001s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Merge 5.15.106 into android13-5.15-lts crash: general protection fault in filename_create general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 1 PID: 372 Comm: syz-executor.0 Not tainted 5.15.106-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 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:d_is_positive include/linux/dcache.h:465 [inline] RIP: 0010:filename_create+0x1c2/0x3e0 fs/namei.c:3771 Code: 7d 98 44 89 f2 e8 5e 20 ff ff 48 3d 00 f0 ff ff 49 89 c7 0f 87 a2 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 c1 e9 03 <0f> b6 14 11 84 d2 74 09 80 fa 03 0f 8e b3 01 00 00 41 f7 07 00 00 RSP: 0018:ffffc900006c7d90 EFLAGS: 00010202 RAX: 0000000000000020 RBX: ffffc900006c7e98 RCX: 0000000000000004 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88810c582b50 RBP: ffffc900006c7e48 R08: 0000000000000001 R09: ffff88811bbb27cf R10: ffffed10237764f9 R11: ffff8881f7338260 R12: 1ffff920000d8fb4 R13: ffffc900006c7ea0 R14: 0000000000000600 R15: 0000000000000020 FS: 00007f671dae1700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f62f8b5170 CR3: 000000010c5bd000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_mkdirat+0x9c/0x2c0 fs/namei.c:4009 __do_sys_mkdirat fs/namei.c:4034 [inline] __se_sys_mkdirat fs/namei.c:4032 [inline] __x64_sys_mkdirat+0xf4/0x140 fs/namei.c:4032 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: 0033:0x7f671df8f169 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:00007f671dae1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f671e0af050 RCX: 00007f671df8f169 RDX: 0000000000000000 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007f671dfeaca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff8c7cfe4f R14: 00007f671dae1300 R15: 0000000000022000 Modules linked in: ---[ end trace 44addc8de3a29337 ]--- 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:d_is_positive include/linux/dcache.h:465 [inline] RIP: 0010:filename_create+0x1c2/0x3e0 fs/namei.c:3771 Code: 7d 98 44 89 f2 e8 5e 20 ff ff 48 3d 00 f0 ff ff 49 89 c7 0f 87 a2 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 c1 e9 03 <0f> b6 14 11 84 d2 74 09 80 fa 03 0f 8e b3 01 00 00 41 f7 07 00 00 RSP: 0018:ffffc900006c7d90 EFLAGS: 00010202 RAX: 0000000000000020 RBX: ffffc900006c7e98 RCX: 0000000000000004 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88810c582b50 RBP: ffffc900006c7e48 R08: 0000000000000001 R09: ffff88811bbb27cf R10: ffffed10237764f9 R11: ffff8881f7338260 R12: 1ffff920000d8fb4 R13: ffffc900006c7ea0 R14: 0000000000000600 R15: 0000000000000020 FS: 00007f671dae1700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f62f8b5170 CR3: 000000010c5bd000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 7d 98 jge 0xffffff9a 2: 44 89 f2 mov %r14d,%edx 5: e8 5e 20 ff ff callq 0xffff2068 a: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 10: 49 89 c7 mov %rax,%r15 13: 0f 87 a2 00 00 00 ja 0xbb 19: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 20: fc ff df 23: 48 89 c1 mov %rax,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 0f b6 14 11 movzbl (%rcx,%rdx,1),%edx <-- trapping instruction 2e: 84 d2 test %dl,%dl 30: 74 09 je 0x3b 32: 80 fa 03 cmp $0x3,%dl 35: 0f 8e b3 01 00 00 jle 0x1ee 3b: 41 rex.B 3c: f7 .byte 0xf7 3d: 07 (bad)