Hello, syzbot found the following issue on:
HEAD commit: f1dce1f09380 Merge tag 'slab-for-6.12-rc7' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15e99e30580000 kernel config: https://syzkaller.appspot.com/x/.config?x=64aa0d9945bd5c1 dashboard link: https://syzkaller.appspot.com/bug?extid=13b85e45ca365499aad5 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-f1dce1f0.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c2f2da35f667/vmlinux-f1dce1f0.xz kernel image: https://storage.googleapis.com/syzbot-assets/31f60f71e8a7/bzImage-f1dce1f0.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+13b85e45ca365499a...@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 32768 bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,str_hash=crc64,journal_flush_disabled,norecovery,nojournal_transaction_names,allocator_stuck_timeout=32767,no_data_io bcachefs (loop0): recovering from clean shutdown, journal seq 10 bcachefs (loop0): accounting_read... done bcachefs (loop0): alloc_read... done bcachefs (loop0): stripes_read... done bcachefs (loop0): snapshots_read... done bcachefs (loop0): going read-write bcachefs (loop0): done starting filesystem FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted 6.12.0-rc6-syzkaller-00192-gf1dce1f09380 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 fail_dump lib/fault-inject.c:53 [inline] should_fail_ex+0x3b0/0x4e0 lib/fault-inject.c:154 should_failslab+0xac/0x100 mm/failslab.c:46 slab_pre_alloc_hook mm/slub.c:4038 [inline] slab_alloc_node mm/slub.c:4114 [inline] kmem_cache_alloc_noprof+0x6c/0x2a0 mm/slub.c:4141 __bkey_cached_alloc+0x26/0xe0 fs/bcachefs/btree_key_cache.c:123 bkey_cached_alloc fs/bcachefs/btree_key_cache.c:149 [inline] btree_key_cache_create fs/bcachefs/btree_key_cache.c:220 [inline] btree_key_cache_fill+0x2043/0x2920 fs/bcachefs/btree_key_cache.c:309 bch2_btree_path_traverse_cached+0x84e/0xbe0 fs/bcachefs/btree_key_cache.c:361 bch2_btree_path_traverse_one+0x45d/0x2940 fs/bcachefs/btree_iter.c:1159 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline] bch2_trans_update_get_key_cache+0x6c0/0x1230 fs/bcachefs/btree_update.c:494 bch2_trans_update+0x9b1/0x2550 fs/bcachefs/btree_update.c:539 bch2_inode_write fs/bcachefs/inode.h:139 [inline] bch2_create_trans+0xdfb/0x1af0 fs/bcachefs/fs-common.c:179 __bch2_create+0x7ae/0xf60 fs/bcachefs/fs.c:522 bch2_mknod fs/bcachefs/fs.c:673 [inline] bch2_create+0xea/0x1b0 fs/bcachefs/fs.c:687 lookup_open fs/namei.c:3595 [inline] open_last_lookups fs/namei.c:3694 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3930 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_open fs/open.c:1438 [inline] __se_sys_open fs/open.c:1434 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1434 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f061377e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f061457d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f0613935f80 RCX: 00007f061377e719 RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000000020000180 RBP: 00007f061457d090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 0000000000000000 R14: 00007f0613935f80 R15: 00007ffdaceeed98 </TASK> Oops: general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077] CPU: 0 UID: 0 PID: 5331 Comm: syz.0.0 Not tainted 6.12.0-rc6-syzkaller-00192-gf1dce1f09380 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065 Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d e8 ed ac 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 a9 51 8e 00 48 be 00 00 00 00 00 fc RSP: 0018:ffffc9000d9a60d0 EFLAGS: 00010002 RAX: 000000000000000e RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000070 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff203a146 R12: ffff888000adc880 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000070 FS: 00007f061457d6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f9c4079148 CR3: 0000000042e60000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 six_lock_ip_waiter+0x9e/0x160 fs/bcachefs/six.c:553 six_lock_ip fs/bcachefs/six.h:253 [inline] six_lock_ip_intent fs/bcachefs/six.h:366 [inline] six_lock_intent fs/bcachefs/six.h:366 [inline] bkey_cached_alloc fs/bcachefs/btree_key_cache.c:169 [inline] btree_key_cache_create fs/bcachefs/btree_key_cache.c:220 [inline] btree_key_cache_fill+0x59a/0x2920 fs/bcachefs/btree_key_cache.c:309 bch2_btree_path_traverse_cached+0x84e/0xbe0 fs/bcachefs/btree_key_cache.c:361 bch2_btree_path_traverse_one+0x45d/0x2940 fs/bcachefs/btree_iter.c:1159 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline] bch2_trans_update_get_key_cache+0x6c0/0x1230 fs/bcachefs/btree_update.c:494 bch2_trans_update+0x9b1/0x2550 fs/bcachefs/btree_update.c:539 bch2_inode_write fs/bcachefs/inode.h:139 [inline] bch2_create_trans+0xdfb/0x1af0 fs/bcachefs/fs-common.c:179 __bch2_create+0x7ae/0xf60 fs/bcachefs/fs.c:522 bch2_mknod fs/bcachefs/fs.c:673 [inline] bch2_create+0xea/0x1b0 fs/bcachefs/fs.c:687 lookup_open fs/namei.c:3595 [inline] open_last_lookups fs/namei.c:3694 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3930 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_open fs/open.c:1438 [inline] __se_sys_open fs/open.c:1434 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1434 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f061377e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f061457d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f0613935f80 RCX: 00007f061377e719 RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000000020000180 RBP: 00007f061457d090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 0000000000000000 R14: 00007f0613935f80 R15: 00007ffdaceeed98 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065 Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d e8 ed ac 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 a9 51 8e 00 48 be 00 00 00 00 00 fc RSP: 0018:ffffc9000d9a60d0 EFLAGS: 00010002 RAX: 000000000000000e RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 0000000000000070 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: fffffbfff203a146 R12: ffff888000adc880 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000070 FS: 00007f061457d6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f9c4079148 CR3: 0000000042e60000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: b6 04 mov $0x4,%dh 2: 30 84 c0 0f 85 9b 16 xor %al,0x169b850f(%rax,%rax,8) 9: 00 00 add %al,(%rax) b: 45 31 f6 xor %r14d,%r14d e: 83 3d e8 ed ac 0e 00 cmpl $0x0,0xeacede8(%rip) # 0xeacedfd 15: 0f 84 b6 13 00 00 je 0x13d1 1b: 89 54 24 54 mov %edx,0x54(%rsp) 1f: 89 5c 24 68 mov %ebx,0x68(%rsp) 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 ff mov %r15,%rdi 33: e8 a9 51 8e 00 call 0x8e51e1 38: 48 rex.W 39: be 00 00 00 00 mov $0x0,%esi 3e: 00 fc add %bh,%ah --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkal...@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
