ci2 starts bisection 2023-05-01 17:04:19.058825123 +0000 UTC m=+264113.079196314 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: 81bc25bcc9c5d493f616fa7cee239a1b097b4cb6e0d48114ef0f4db42640fa65 all runs: crashed: BUG: unable to handle kernel paging request in udf_close_lvid testing current HEAD ca48fc16c49388400eddd6c6614593ebf7c7726a testing commit ca48fc16c49388400eddd6c6614593ebf7c7726a gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 27b688b34db5622b31d69a8c5d92637b6f70038e2675a71f916ab0d579ade009 all runs: crashed: BUG: unable to handle kernel paging request in udf_close_lvid revisions tested: 2, total time: 36m53.021692678s (build: 29m42.25202233s, test: 6m30.982494508s) the crash still happens on HEAD commit msg: Linux 6.1.27 crash: BUG: unable to handle kernel paging request in udf_close_lvid BUG: unable to handle page fault for address: ffffed101b0a9ad9 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffee067 P4D 23ffee067 PUD 13fff5067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 3895 Comm: syz-executor.0 Not tainted 6.1.27-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 RIP: 0010:udf_close_lvid+0x152/0x930 fs/udf/super.c:2073 Code: 0f 84 0e 04 00 00 48 8b 44 24 30 48 8d b8 c0 00 00 00 48 89 7c 24 48 31 f6 e8 3a 39 cb 06 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 50 04 00 00 4c 89 74 24 50 41 c6 44 24 RSP: 0018:ffffc9000491fbe0 EFLAGS: 00010a02 RAX: 1ffff1101b0a9ad9 RBX: ffff88806d24004b RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8a3b6aa0 RDI: ffff8880d854d6c8 RBP: ffffc9000491fcc8 R08: dffffc0000000000 R09: fffffbfff1a7cbb6 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880d854d6b0 R13: dffffc0000000000 R14: 1ffff92000923f88 R15: ffff8880234ec678 FS: 0000555556c6c400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed101b0a9ad9 CR3: 0000000073b29000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: udf_put_super+0xad/0x130 fs/udf/super.c:2360 generic_shutdown_super+0x10f/0x2d0 fs/super.c:501 kill_block_super+0x75/0xc0 fs/super.c:1450 deactivate_locked_super+0x71/0xd0 fs/super.c:332 cleanup_mnt+0x3af/0x430 fs/namespace.c:1186 task_work_run+0x206/0x290 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f90e548d567 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007ffdff26f198 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f90e548d567 RDX: 00007ffdff26f269 RSI: 000000000000000a RDI: 00007ffdff26f260 RBP: 00007ffdff26f260 R08: 00000000ffffffff R09: 00007ffdff26f030 R10: 0000555556c6d8ab R11: 0000000000000246 R12: 00007f90e54e6b74 R13: 00007ffdff270320 R14: 0000555556c6d810 R15: 00007ffdff270360 Modules linked in: CR2: ffffed101b0a9ad9 ---[ end trace 0000000000000000 ]--- RIP: 0010:udf_close_lvid+0x152/0x930 fs/udf/super.c:2073 Code: 0f 84 0e 04 00 00 48 8b 44 24 30 48 8d b8 c0 00 00 00 48 89 7c 24 48 31 f6 e8 3a 39 cb 06 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 50 04 00 00 4c 89 74 24 50 41 c6 44 24 RSP: 0018:ffffc9000491fbe0 EFLAGS: 00010a02 RAX: 1ffff1101b0a9ad9 RBX: ffff88806d24004b RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff8a3b6aa0 RDI: ffff8880d854d6c8 RBP: ffffc9000491fcc8 R08: dffffc0000000000 R09: fffffbfff1a7cbb6 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880d854d6b0 R13: dffffc0000000000 R14: 1ffff92000923f88 R15: ffff8880234ec678 FS: 0000555556c6c400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed101b0a9ad9 CR3: 0000000073b29000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 84 0e 04 00 00 je 0x414 6: 48 8b 44 24 30 mov 0x30(%rsp),%rax b: 48 8d b8 c0 00 00 00 lea 0xc0(%rax),%rdi 12: 48 89 7c 24 48 mov %rdi,0x48(%rsp) 17: 31 f6 xor %esi,%esi 19: e8 3a 39 cb 06 callq 0x6cb3958 1e: 49 8d 7c 24 18 lea 0x18(%r12),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 50 04 00 00 jne 0x487 37: 4c 89 74 24 50 mov %r14,0x50(%rsp) 3c: 41 rex.B 3d: c6 .byte 0xc6 3e: 44 rex.R 3f: 24 .byte 0x24