ci2 starts bisection 2023-02-25 16:13:18.998407062 +0000 UTC m=+108023.674594679 bisecting fixing commit since 493ffd6605b2d3d4dc7008ab927dba319f36671f building syzkaller on 16a9c9e0fe35ce296944c5682f4a54d52bd67e71 ensuring issue is reproducible on original commit 493ffd6605b2d3d4dc7008ab927dba319f36671f testing commit 493ffd6605b2d3d4dc7008ab927dba319f36671f gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: bc42f83b2d1f80256f87f2bc709a6e89e90cf9619d7eaf3a6b3b20f76d1641ac all runs: crashed: general protection fault in dtInsert testing current HEAD 489fa31ea873282b41046d412ec741f93946fc2d testing commit 489fa31ea873282b41046d412ec741f93946fc2d gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e8d7531802c13a2397bd8b65faaa2b337031ea00f62c1c65528686389c346481 run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: exit status NUM run #1: basic kernel testing failed: BUG: program execution failed: executor NUM: exit status NUM run #2: basic kernel testing failed: BUG: program execution failed: executor NUM: exit status NUM run #3: crashed: general protection fault in dtInsert run #4: crashed: general protection fault in dtInsert run #5: crashed: general protection fault in dtInsert run #6: crashed: general protection fault in dtInsert run #7: crashed: general protection fault in dtInsert run #8: crashed: general protection fault in dtInsert run #9: crashed: general protection fault in dtInsert revisions tested: 2, total time: 47m23.303380087s (build: 37m34.715465584s, test: 6m48.835705328s) the crash still happens on HEAD commit msg: Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs crash: general protection fault in dtInsert loop0: detected capacity change from 0 to 32768 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 5578 Comm: syz-executor.0 Not tainted 6.2.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 RIP: 0010:dtInsert+0x2f55/0x6c80 Code: 8b 9c 24 98 00 00 00 74 12 48 89 df e8 24 19 00 ff 48 ba 00 00 00 00 00 fc ff df 4c 89 33 eb 03 45 31 f6 4c 89 f3 48 c1 eb 03 <80> 3c 13 00 74 08 4c 89 f7 e8 5d 18 00 ff 49 8b 36 48 85 f6 0f 84 RSP: 0018:ffffc9000506f6e0 EFLAGS: 00010246 RAX: ffffc9000506fc30 RBX: 0000000000000000 RCX: ffffffff82c273e5 RDX: dffffc0000000000 RSI: 1ffff92000a0df34 RDI: ffffc9000506fa70 RBP: ffffc9000506fb50 R08: dffffc0000000000 R09: fffff940003f4dbf R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 1ffff92000a0df35 R14: 0000000000000000 R15: ffff88807638c000 FS: 00007f797b282700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f797a113e09 CR3: 000000002738e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: jfs_create+0x5ec/0x970 vfs_create+0x193/0x2d0 do_mknodat+0x33f/0x640 __x64_sys_mknodat+0xa4/0xb0 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f797a08b5a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f797b282168 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 RAX: ffffffffffffffda RBX: 00007f797a1abf80 RCX: 00007f797a08b5a9 RDX: 0000000000000008 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00007f797a0e6580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000103 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffb2cb6ddf R14: 00007f797b282300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dtInsert+0x2f55/0x6c80 Code: 8b 9c 24 98 00 00 00 74 12 48 89 df e8 24 19 00 ff 48 ba 00 00 00 00 00 fc ff df 4c 89 33 eb 03 45 31 f6 4c 89 f3 48 c1 eb 03 <80> 3c 13 00 74 08 4c 89 f7 e8 5d 18 00 ff 49 8b 36 48 85 f6 0f 84 RSP: 0018:ffffc9000506f6e0 EFLAGS: 00010246 RAX: ffffc9000506fc30 RBX: 0000000000000000 RCX: ffffffff82c273e5 RDX: dffffc0000000000 RSI: 1ffff92000a0df34 RDI: ffffc9000506fa70 RBP: ffffc9000506fb50 R08: dffffc0000000000 R09: fffff940003f4dbf R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: 1ffff92000a0df35 R14: 0000000000000000 R15: ffff88807638c000 FS: 00007f797b282700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f55e0229000 CR3: 000000002738e000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8b 9c 24 98 00 00 00 mov 0x98(%rsp),%ebx 7: 74 12 je 0x1b 9: 48 89 df mov %rbx,%rdi c: e8 24 19 00 ff callq 0xff001935 11: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 18: fc ff df 1b: 4c 89 33 mov %r14,(%rbx) 1e: eb 03 jmp 0x23 20: 45 31 f6 xor %r14d,%r14d 23: 4c 89 f3 mov %r14,%rbx 26: 48 c1 eb 03 shr $0x3,%rbx * 2a: 80 3c 13 00 cmpb $0x0,(%rbx,%rdx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 f7 mov %r14,%rdi 33: e8 5d 18 00 ff callq 0xff001895 38: 49 8b 36 mov (%r14),%rsi 3b: 48 85 f6 test %rsi,%rsi 3e: 0f .byte 0xf 3f: 84 .byte 0x84