ci2 starts bisection 2023-06-25 14:51:07.115101947 +0000 UTC m=+410851.344060202 bisecting fixing commit since 86a6bbdc8ffe588059b2cef842f78fa44a6fefb0 building syzkaller on 4bce1a3e705a8b62de8194bdb28f5eef89c8feec ensuring issue is reproducible on original commit 86a6bbdc8ffe588059b2cef842f78fa44a6fefb0 testing commit 86a6bbdc8ffe588059b2cef842f78fa44a6fefb0 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 3feb270410056e0a14cae19f92b38c823996291508acef9c9131348262fca878 run #0: crashed: general protection fault in ext4_acquire_dquot run #1: crashed: general protection fault in ext4_release_dquot run #2: crashed: general protection fault in ext4_acquire_dquot run #3: crashed: general protection fault in ext4_acquire_dquot run #4: crashed: general protection fault in ext4_acquire_dquot run #5: crashed: general protection fault in ext4_acquire_dquot run #6: crashed: general protection fault in ext4_acquire_dquot run #7: crashed: general protection fault in ext4_release_dquot run #8: crashed: general protection fault in ext4_release_dquot run #9: crashed: general protection fault in ext4_acquire_dquot run #10: crashed: general protection fault in ext4_acquire_dquot run #11: crashed: general protection fault in ext4_acquire_dquot run #12: crashed: general protection fault in ext4_acquire_dquot run #13: crashed: general protection fault in ext4_acquire_dquot run #14: crashed: general protection fault in ext4_acquire_dquot run #15: crashed: general protection fault in ext4_acquire_dquot run #16: crashed: general protection fault in ext4_acquire_dquot run #17: crashed: general protection fault in ext4_acquire_dquot run #18: crashed: general protection fault in ext4_acquire_dquot run #19: crashed: general protection fault in ext4_acquire_dquot testing current HEAD fa9645687ea537ad8e29287f3ef08396bc4baaba testing commit fa9645687ea537ad8e29287f3ef08396bc4baaba gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: f6bb9af0dc1834997251b2158a6d9b302c4efb188c543977a349d8178c2fd1bd run #0: crashed: general protection fault in ext4_acquire_dquot run #1: crashed: general protection fault in ext4_acquire_dquot run #2: crashed: general protection fault in ext4_acquire_dquot run #3: crashed: general protection fault in ext4_acquire_dquot run #4: crashed: general protection fault in ext4_release_dquot run #5: crashed: general protection fault in ext4_acquire_dquot run #6: crashed: general protection fault in ext4_acquire_dquot run #7: crashed: general protection fault in ext4_release_dquot run #8: crashed: general protection fault in ext4_acquire_dquot run #9: crashed: general protection fault in ext4_acquire_dquot crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 45m9.956560572s (build: 34m50.855261289s, test: 9m26.405850903s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: FROMLIST: kheaders: dereferences the source tree crash: general protection fault in ext4_acquire_dquot 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: 1746 Comm: syz-executor.3 Tainted: G W 6.1.25-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:ext4_acquire_dquot+0x1f5/0x400 fs/ext4/super.c:6738 Code: 48 c1 e8 03 80 3c 10 00 74 12 48 89 df e8 43 ea c2 ff 48 ba 00 00 00 00 00 fc ff df 4c 8b 33 49 83 c6 28 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 1d ea c2 ff 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc9000317f4e0 EFLAGS: 00010206 RAX: 0000000000000005 RBX: ffff88811a895188 RCX: ffffffff81c33356 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88811e2d33c0 RBP: ffffc9000317f528 R08: dffffc0000000000 R09: ffffed1023c5a68b R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11023c5a688 R13: 0000000000000049 R14: 0000000000000028 R15: ffff888128cbe068 FS: 00007f3ea695e700(0000) GS:ffff8881f7300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efe90c34000 CR3: 000000012060e000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dqget+0x7be/0xc70 fs/quota/dquot.c:914 __dquot_initialize+0x38e/0xd90 fs/quota/dquot.c:1492 dquot_initialize fs/quota/dquot.c:1550 [inline] dquot_file_open+0x47/0x70 fs/quota/dquot.c:2181 ext4_file_open+0x24a/0x610 fs/ext4/file.c:893 do_dentry_open+0x661/0xec0 fs/open.c:884 vfs_open+0x6e/0x80 fs/open.c:1015 do_open fs/namei.c:3557 [inline] path_openat+0x1eb2/0x2450 fs/namei.c:3714 do_filp_open+0x226/0x430 fs/namei.c:3741 do_sys_openat2+0x103/0x6c0 fs/open.c:1333 do_sys_open fs/open.c:1349 [inline] __do_sys_openat fs/open.c:1365 [inline] __se_sys_openat fs/open.c:1360 [inline] __x64_sys_openat+0x209/0x250 fs/open.c:1360 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3ea5c8c169 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:00007f3ea695e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f3ea5dabf80 RCX: 00007f3ea5c8c169 RDX: 000000000000275a RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f3ea5ce7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe3acb36cf R14: 00007f3ea695e300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_acquire_dquot+0x1f5/0x400 fs/ext4/super.c:6738 Code: 48 c1 e8 03 80 3c 10 00 74 12 48 89 df e8 43 ea c2 ff 48 ba 00 00 00 00 00 fc ff df 4c 8b 33 49 83 c6 28 4c 89 f0 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 f7 e8 1d ea c2 ff 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc9000317f4e0 EFLAGS: 00010206 RAX: 0000000000000005 RBX: ffff88811a895188 RCX: ffffffff81c33356 RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffff88811e2d33c0 RBP: ffffc9000317f528 R08: dffffc0000000000 R09: ffffed1023c5a68b R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff11023c5a688 R13: 0000000000000049 R14: 0000000000000028 R15: ffff888128cbe068 FS: 00007f3ea695e700(0000) GS:ffff8881f7200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f85bec53000 CR3: 000000012060e000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 c1 e8 03 shr $0x3,%rax 4: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) 8: 74 12 je 0x1c a: 48 89 df mov %rbx,%rdi d: e8 43 ea c2 ff callq 0xffc2ea55 12: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 19: fc ff df 1c: 4c 8b 33 mov (%rbx),%r14 1f: 49 83 c6 28 add $0x28,%r14 23: 4c 89 f0 mov %r14,%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: 4c 89 f7 mov %r14,%rdi 33: e8 1d ea c2 ff callq 0xffc2ea55 38: 48 rex.W 39: ba 00 00 00 00 mov $0x0,%edx 3e: 00 fc add %bh,%ah