ci starts bisection 2023-03-21 23:15:30.886591828 +0000 UTC m=+6494.173610757 bisecting fixing commit since 7c46948a6e9cf47ed03b0d489fde894ad46f1437 building syzkaller on 9dfcf09cf38eb123a007af28c5ee2562718893a0 ensuring issue is reproducible on original commit 7c46948a6e9cf47ed03b0d489fde894ad46f1437 testing commit 7c46948a6e9cf47ed03b0d489fde894ad46f1437 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b291368ebe3b8a2c0a295aa9cb3b4e3f8129076c6e5e176fcf1b2d3b577e7d97 run #0: crashed: general protection fault in txEnd run #1: crashed: general protection fault in txEnd run #2: crashed: general protection fault in txEnd run #3: crashed: general protection fault in txEnd run #4: crashed: general protection fault in txEnd run #5: crashed: kernel BUG in txEnd run #6: crashed: general protection fault in txEnd run #7: crashed: general protection fault in txEnd run #8: crashed: general protection fault in txEnd run #9: crashed: general protection fault in txEnd run #10: crashed: general protection fault in txEnd run #11: crashed: general protection fault in txEnd run #12: crashed: general protection fault in txEnd run #13: crashed: general protection fault in txEnd run #14: crashed: general protection fault in txEnd run #15: crashed: general protection fault in txEnd run #16: crashed: general protection fault in txEnd run #17: crashed: general protection fault in txEnd run #18: crashed: general protection fault in txEnd run #19: crashed: general protection fault in txEnd testing current HEAD a1effab7a3a35a837dd9d2b974a1bc4939df1ad5 testing commit a1effab7a3a35a837dd9d2b974a1bc4939df1ad5 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 7523351f1de0fcc7ea15e0426d536a977158fd73f1ac03eaa380e20f23839268 run #0: crashed: general protection fault in txEnd run #1: crashed: general protection fault in txEnd run #2: crashed: general protection fault in txEnd run #3: crashed: general protection fault in txEnd run #4: crashed: general protection fault in txEnd run #5: crashed: general protection fault in txEnd run #6: crashed: kernel BUG in txEnd run #7: crashed: general protection fault in txEnd run #8: crashed: general protection fault in txEnd run #9: crashed: general protection fault in txEnd revisions tested: 2, total time: 26m28.924933483s (build: 19m12.528430699s, test: 6m14.716183866s) the crash still happens on HEAD commit msg: Merge tag 'vfio-v6.3-rc4' of https://github.com/awilliam/linux-vfio crash: general protection fault in txEnd read_mapping_page failed! ERROR: (device loop0): txCommit: general protection fault, probably for non-canonical address 0xdffffc0000000029: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000148-0x000000000000014f] CPU: 0 PID: 5678 Comm: syz-executor.0 Not tainted 6.3.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 RIP: 0010:txEnd+0x1b9/0x4a0 fs/jfs/jfs_txnmgr.c:534 Code: 4d c6 23 0e 49 8d bc 24 4c 01 00 00 0f b7 ed 48 89 fa 89 2d 39 c6 23 0e 48 c1 ea 03 66 89 43 28 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 26 RSP: 0018:ffffc90004effb28 EFLAGS: 00010213 RAX: dffffc0000000000 RBX: ffffc90002211110 RCX: 0000000000000000 RDX: 0000000000000029 RSI: ffffffff896b9020 RDI: 000000000000014c RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff9038bbcf R10: 0000000000000001 R11: 1ffffffff1f673a9 R12: 0000000000000000 R13: ffffffff8bcb2600 R14: ffffc90002211112 R15: ffffc90002432060 FS: 00007ffb6f542700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f6243bf950 CR3: 000000001c78d000 CR4: 0000000000350ef0 Call Trace: add_missing_indices fs/jfs/jfs_dtree.c:2658 [inline] jfs_readdir+0x201f/0x3610 fs/jfs/jfs_dtree.c:3004 iterate_dir+0x1aa/0x6c0 fs/readdir.c:67 __do_sys_getdents fs/readdir.c:286 [inline] __se_sys_getdents fs/readdir.c:271 [inline] __x64_sys_getdents+0x126/0x240 fs/readdir.c:271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7ffb6e88c0c9 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:00007ffb6f542168 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007ffb6e9ac050 RCX: 00007ffb6e88c0c9 RDX: 000000000000004c RSI: 0000000020000100 RDI: 0000000000000004 RBP: 00007ffb6e8e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffceea7b1ef R14: 00007ffb6f542300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:txEnd+0x1b9/0x4a0 fs/jfs/jfs_txnmgr.c:534 Code: 4d c6 23 0e 49 8d bc 24 4c 01 00 00 0f b7 ed 48 89 fa 89 2d 39 c6 23 0e 48 c1 ea 03 66 89 43 28 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 26 RSP: 0018:ffffc90004effb28 EFLAGS: 00010213 RAX: dffffc0000000000 RBX: ffffc90002211110 RCX: 0000000000000000 RDX: 0000000000000029 RSI: ffffffff896b9020 RDI: 000000000000014c RBP: 0000000000000001 R08: 0000000000000001 R09: ffffffff9038bbcf R10: 0000000000000001 R11: 1ffffffff1f673a9 R12: 0000000000000000 R13: ffffffff8bcb2600 R14: ffffc90002211112 R15: ffffc90002432060 FS: 00007ffb6f542700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f6243bf950 CR3: 000000001c78d000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: 4d c6 rex.WRB (bad) 2: 23 0e and (%rsi),%ecx 4: 49 8d bc 24 4c 01 00 lea 0x14c(%r12),%rdi b: 00 c: 0f b7 ed movzwl %bp,%ebp f: 48 89 fa mov %rdi,%rdx 12: 89 2d 39 c6 23 0e mov %ebp,0xe23c639(%rip) # 0xe23c651 18: 48 c1 ea 03 shr $0x3,%rdx 1c: 66 89 43 28 mov %ax,0x28(%rbx) 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx <-- trapping instruction 2e: 48 89 f8 mov %rdi,%rax 31: 83 e0 07 and $0x7,%eax 34: 83 c0 03 add $0x3,%eax 37: 38 d0 cmp %dl,%al 39: 7c 08 jl 0x43 3b: 84 d2 test %dl,%dl 3d: 0f .byte 0xf 3e: 85 26 test %esp,(%rsi)