linux-kernel - [syzbot] [bcachefs?] kernel BUG in bch2_fs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <0000000000008160ad06179354a2@google.com>
Date: Fri, 03 May 2024 14:23:25 -0700
From: syzbot <syzbot+05c1843ef85da9e52042@...kaller.appspotmail.com>
To: bfoster@...hat.com, kent.overstreet@...ux.dev, 
	linux-bcachefs@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] kernel BUG in bch2_fs_recovery

Hello,

syzbot found the following issue on:

HEAD commit:    3d25a941ea50 Merge tag 'block-6.9-20240503' of git://git.k..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=114b39ff180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3310e643b6ef5d69
dashboard link: https://syzkaller.appspot.com/bug?extid=05c1843ef85da9e52042
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13aed9df180000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14ac7a28980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-3d25a941.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9d8ed74e49f1/vmlinux-3d25a941.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d724e9151b52/bzImage-3d25a941.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/998b7ff57836/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+05c1843ef85da9e52042@...kaller.appspotmail.com

  u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq afc6cc17f332ffe0 written 24 min_key POS_MIN durability: 0 (invalid extent entry 0000000000020040)
  invalid extent entry type (got 6, max 6), shutting down
bcachefs (loop0): inconsistency detected - emergency read only at journal seq 0
------------[ cut here ]------------
kernel BUG at arch/x86/mm/physaddr.c:23!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 2 PID: 5178 Comm: syz-executor317 Not tainted 6.9.0-rc6-syzkaller-00227-g3d25a941ea50 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__phys_addr+0x120/0x150 arch/x86/mm/physaddr.c:23
Code: 10 00 75 39 48 8b 1d 4f c8 1b 0c 48 89 ee bf ff ff ff 1f e8 72 49 4f 00 48 01 eb 48 81 fd ff ff ff 1f 76 a7 e8 51 4e 4f 00 90 <0f> 0b 48 c7 c7 bd 39 9f 8f e8 b2 99 aa 00 e9 52 ff ff ff 48 c7 c7
RSP: 0018:ffffc900032ef4a0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 000000007ffff75e RCX: ffffffff813e77ce
RDX: ffff888011aca440 RSI: ffffffff813e77df RDI: 0000000000000007
RBP: 000000007ffff75e R08: 0000000000000007 R09: 000000001fffffff
R10: 000000007ffff75e R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: 00000000663551f8 R15: ffffed1005ea010e
FS:  000055557a454380(0000) GS:ffff88806b400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff7a9096410 CR3: 00000000203ec000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 virt_to_folio include/linux/mm.h:1306 [inline]
 kfree+0x6c/0x390 mm/slub.c:4382
 bch2_fs_recovery+0xfe9/0x3c40 fs/bcachefs/recovery.c:905
 bch2_fs_start+0x2e9/0x600 fs/bcachefs/super.c:1043
 bch2_fs_open+0xf87/0x1110 fs/bcachefs/super.c:2102
 bch2_mount+0xdcc/0x1130 fs/bcachefs/fs.c:1903
 legacy_get_tree+0x109/0x220 fs/fs_context.c:662
 vfs_get_tree+0x8f/0x380 fs/super.c:1779
 do_new_mount fs/namespace.c:3352 [inline]
 path_mount+0x14e6/0x1f20 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __x64_sys_mount+0x297/0x320 fs/namespace.c:3875
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ad400a8fa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 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:00007ffd674e3108 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd674e3120 RCX: 00007f1ad400a8fa
RDX: 0000000020011a00 RSI: 0000000020000080 RDI: 00007ffd674e3120
RBP: 0000000000000004 R08: 00007ffd674e3160 R09: 00000000000119fd
R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000
R13: 00007ffd674e3160 R14: 0000000000000003 R15: 0000000001000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__phys_addr+0x120/0x150 arch/x86/mm/physaddr.c:23
Code: 10 00 75 39 48 8b 1d 4f c8 1b 0c 48 89 ee bf ff ff ff 1f e8 72 49 4f 00 48 01 eb 48 81 fd ff ff ff 1f 76 a7 e8 51 4e 4f 00 90 <0f> 0b 48 c7 c7 bd 39 9f 8f e8 b2 99 aa 00 e9 52 ff ff ff 48 c7 c7
RSP: 0018:ffffc900032ef4a0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 000000007ffff75e RCX: ffffffff813e77ce
RDX: ffff888011aca440 RSI: ffffffff813e77df RDI: 0000000000000007
RBP: 000000007ffff75e R08: 0000000000000007 R09: 000000001fffffff
R10: 000000007ffff75e R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000001 R14: 00000000663551f8 R15: ffffed1005ea010e
FS:  000055557a454380(0000) GS:ffff88806b400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff7a9096410 CR3: 00000000203ec000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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 syzkaller@...glegroups.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 syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

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