ci2 starts bisection 2023-03-29 06:51:55.380103413 +0000 UTC m=+50864.522990938 bisecting fixing commit since 1b929c02afd37871d5afb9d498426f83432e71c2 building syzkaller on 44712fbc6b687170984c3562336a415b56d82607 ensuring issue is reproducible on original commit 1b929c02afd37871d5afb9d498426f83432e71c2 testing commit 1b929c02afd37871d5afb9d498426f83432e71c2 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e5998181efccce4d31c3c0455cc3e9cb1c53897fa333dca93545c76259c7850a all runs: crashed: general protection fault in direct2indirect testing current HEAD fcd476ea6a888ef6e6627f4c21a2ea8cca3e9312 testing commit fcd476ea6a888ef6e6627f4c21a2ea8cca3e9312 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ce2026cd659dc5dd9b071c9bd2f157525698ab6a45f1fe8da65cd7cbbaa892cd all runs: crashed: general protection fault in direct2indirect revisions tested: 2, total time: 47m35.023616732s (build: 38m47.719501386s, test: 7m3.703579861s) the crash still happens on HEAD commit msg: Merge tag 'urgent-rcu.2023.03.28a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu crash: general protection fault in direct2indirect REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): using 3.5.x disk format REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 4029, free_space(entry_count) 2 REISERFS error (device loop0): vs-5150 search_by_key: invalid format found in block 549. Fsck? REISERFS (device loop0): Remounting filesystem read-only general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 1 PID: 5619 Comm: syz-executor.0 Not tainted 6.3.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023 RIP: 0010:direct2indirect+0x811/0x1560 Code: 49 c1 e7 04 4f 8d 74 3d 08 4c 89 f0 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 36 02 00 00 4d 63 3e 48 83 c3 28 48 89 d8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 df e8 61 6d bf ff 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc900049e7100 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 0000000000000028 RCX: ffffffff81da7da4 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff888072819970 RBP: ffffc900049e7290 R08: dffffc0000000000 R09: ffffed100e50332f R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888072819580 R13: ffffc900049e76d8 R14: ffffc900049e76f0 R15: 0000000000000000 FS: 00007f699f69f700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000201 CR3: 0000000077247000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_get_block+0x4115/0x4870 __block_write_begin_int+0x37f/0x1240 reiserfs_write_begin+0x201/0x4b0 generic_perform_write+0x2b6/0x500 __generic_file_write_iter+0x143/0x340 generic_file_write_iter+0x9d/0x230 vfs_write+0x7be/0xb10 ksys_write+0x122/0x200 do_syscall_64+0x41/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f699e88c0a9 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:00007f699f69f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f699e9abf80 RCX: 00007f699e88c0a9 RDX: 00000000175d900f RSI: 0000000020000200 RDI: 0000000000000004 RBP: 00007f699e8e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe5d9fa91f R14: 00007f699f69f300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:direct2indirect+0x811/0x1560 Code: 49 c1 e7 04 4f 8d 74 3d 08 4c 89 f0 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 36 02 00 00 4d 63 3e 48 83 c3 28 48 89 d8 48 c1 e8 03 <80> 3c 10 00 74 12 48 89 df e8 61 6d bf ff 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc900049e7100 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 0000000000000028 RCX: ffffffff81da7da4 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff888072819970 RBP: ffffc900049e7290 R08: dffffc0000000000 R09: ffffed100e50332f R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888072819580 R13: ffffc900049e76d8 R14: ffffc900049e76f0 R15: 0000000000000000 FS: 00007f699f69f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000558023f0d950 CR3: 0000000077247000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 49 c1 e7 04 shl $0x4,%r15 4: 4f 8d 74 3d 08 lea 0x8(%r13,%r15,1),%r14 9: 4c 89 f0 mov %r14,%rax c: 48 c1 e8 03 shr $0x3,%rax 10: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 14: 84 c0 test %al,%al 16: 0f 85 36 02 00 00 jne 0x252 1c: 4d 63 3e movslq (%r14),%r15 1f: 48 83 c3 28 add $0x28,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 48 89 df mov %rbx,%rdi 33: e8 61 6d bf ff callq 0xffbf6d99 38: 48 rex.W 39: ba 00 00 00 00 mov $0x0,%edx 3e: 00 fc add %bh,%ah