ci2 starts bisection 2023-06-01 23:44:10.634683318 +0000 UTC m=+10474.281590987 bisecting fixing commit since 3b29299e5f604550faf3eff811d6cd60b4c6cae6 building syzkaller on f325deb023e4e2fb9197004be1b3da738680429c ensuring issue is reproducible on original commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 testing commit 3b29299e5f604550faf3eff811d6cd60b4c6cae6 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: c245bae3fffe2cf1d3f2026353915842116611188ff711ccdeca579c55cc0fc8 run #0: crashed: general protection fault in bfs_get_block run #1: crashed: general protection fault in bfs_get_block run #2: crashed: WARNING in mark_buffer_dirty run #3: crashed: WARNING in mark_buffer_dirty run #4: crashed: WARNING in mark_buffer_dirty run #5: crashed: WARNING in mark_buffer_dirty run #6: crashed: general protection fault in bfs_get_block run #7: crashed: WARNING in mark_buffer_dirty run #8: crashed: WARNING in mark_buffer_dirty run #9: crashed: WARNING in mark_buffer_dirty run #10: crashed: WARNING in mark_buffer_dirty run #11: crashed: WARNING in mark_buffer_dirty run #12: crashed: general protection fault in bfs_get_block run #13: crashed: general protection fault in bfs_get_block run #14: crashed: general protection fault in bfs_get_block run #15: crashed: WARNING in mark_buffer_dirty run #16: crashed: WARNING in mark_buffer_dirty run #17: crashed: WARNING in mark_buffer_dirty run #18: crashed: WARNING in mark_buffer_dirty run #19: crashed: WARNING in mark_buffer_dirty testing current HEAD d2869ace6eeb8ea8a6e70e6904524c5a6456d3fb testing commit d2869ace6eeb8ea8a6e70e6904524c5a6456d3fb gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 137906e4be480516bdcda0745f3d8f5d30f36380bf2feb299ef7a897c9d69af2 run #0: crashed: WARNING in mark_buffer_dirty run #1: crashed: WARNING in mark_buffer_dirty run #2: crashed: general protection fault in bfs_get_block run #3: crashed: WARNING in mark_buffer_dirty run #4: crashed: general protection fault in bfs_get_block run #5: crashed: WARNING in mark_buffer_dirty run #6: crashed: WARNING in mark_buffer_dirty run #7: crashed: WARNING in mark_buffer_dirty run #8: crashed: WARNING in mark_buffer_dirty run #9: crashed: general protection fault in bfs_get_block crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 44m39.202074887s (build: 37m49.599037465s, test: 6m16.7006688s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Linux 6.1.31 crash: general protection fault in bfs_get_block 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: 4039 Comm: syz-executor.0 Not tainted 6.1.31-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 RIP: 0010:bfs_move_block fs/bfs/file.c:42 [inline] RIP: 0010:bfs_move_blocks fs/bfs/file.c:56 [inline] RIP: 0010:bfs_get_block+0x8cf/0x970 fs/bfs/file.c:125 Code: 55 00 4c 89 f7 4c 89 e6 b9 08 00 00 00 e8 59 12 b1 ff 49 89 c5 48 8d 68 28 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 33 97 97 ff 4c 8b 75 00 49 8d 7f 28 RSP: 0018:ffffc90004b0ec18 EFLAGS: 00010206 RAX: 0000000000000005 RBX: ffff88807a6f0018 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888140d74200 RBP: 0000000000000028 R08: dffffc0000000000 R09: fffff940003713df R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000074 R13: 0000000000000000 R14: ffff888140d74200 R15: ffff8880737c7828 FS: 00007fb10438b700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb10438b6b4 CR3: 000000006bfdf000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __block_write_begin_int+0x380/0x11b0 fs/buffer.c:1991 __block_write_begin fs/buffer.c:2041 [inline] block_write_begin+0x6e/0x140 fs/buffer.c:2102 bfs_write_begin+0x29/0xa0 fs/bfs/file.c:177 generic_perform_write+0x2f1/0x540 mm/filemap.c:3754 __generic_file_write_iter+0x13f/0x340 mm/filemap.c:3882 generic_file_write_iter+0x99/0x230 mm/filemap.c:3914 __kernel_write_iter+0x2c7/0x630 fs/read_write.c:517 __kernel_write+0x11b/0x170 fs/read_write.c:537 __dump_emit+0x1f0/0x300 fs/coredump.c:804 elf_core_dump+0x2ab9/0x39c0 fs/binfmt_elf.c:2291 do_coredump+0x1b1b/0x23a0 fs/coredump.c:755 get_signal+0xf82/0x12c0 kernel/signal.c:2844 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:310 exc_page_fault+0x4e0/0x790 arch/x86/mm/fault.c:1578 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 002b:0000000020000008 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fb1037abf80 RCX: 00007fb10368c0f9 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000000 RBP: 00007fb1036e7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb58b866f R14: 00007fb10438b300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bfs_move_block fs/bfs/file.c:42 [inline] RIP: 0010:bfs_move_blocks fs/bfs/file.c:56 [inline] RIP: 0010:bfs_get_block+0x8cf/0x970 fs/bfs/file.c:125 Code: 55 00 4c 89 f7 4c 89 e6 b9 08 00 00 00 e8 59 12 b1 ff 49 89 c5 48 8d 68 28 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 ef e8 33 97 97 ff 4c 8b 75 00 49 8d 7f 28 RSP: 0018:ffffc90004b0ec18 EFLAGS: 00010206 RAX: 0000000000000005 RBX: ffff88807a6f0018 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888140d74200 RBP: 0000000000000028 R08: dffffc0000000000 R09: fffff940003713df R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000074 R13: 0000000000000000 R14: ffff888140d74200 R15: ffff8880737c7828 FS: 00007fb10438b700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f32faed6440 CR3: 000000006bfdf000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 55 push %rbp 1: 00 4c 89 f7 add %cl,-0x9(%rcx,%rcx,4) 5: 4c 89 e6 mov %r12,%rsi 8: b9 08 00 00 00 mov $0x8,%ecx d: e8 59 12 b1 ff callq 0xffb1126b 12: 49 89 c5 mov %rax,%r13 15: 48 8d 68 28 lea 0x28(%rax),%rbp 19: 48 89 e8 mov %rbp,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 ef mov %rbp,%rdi 33: e8 33 97 97 ff callq 0xff97976b 38: 4c 8b 75 00 mov 0x0(%rbp),%r14 3c: 49 8d 7f 28 lea 0x28(%r15),%rdi