linux-kernel - [syzbot] [bcachefs?] kernel BUG in bch2_ptr

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Message-ID: <671877ae.050a0220.1e4b4d.0084.GAE@google.com>
Date: Tue, 22 Oct 2024 21:12:30 -0700
From: syzbot <syzbot+4f29c3f12f864d8a8d17@...kaller.appspotmail.com>
To: kent.overstreet@...ux.dev, linux-bcachefs@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bcachefs?] kernel BUG in bch2_ptr_swab

Hello,

syzbot found the following issue on:

HEAD commit:    b04ae0f45168 Merge tag 'v6.12-rc3-smb3-client-fixes' of gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14bfbc5f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=cfbd94c114a3d407
dashboard link: https://syzkaller.appspot.com/bug?extid=4f29c3f12f864d8a8d17
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11241f27980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12bfbc5f980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-b04ae0f4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3e40a4ec7885/vmlinux-b04ae0f4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9312d8ec05d3/bzImage-b04ae0f4.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/4ecaa2a54f31/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4f29c3f12f864d8a8d17@...kaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/bcachefs/extents.h:62!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5090 Comm: syz-executor228 Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #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:extent_entry_type fs/bcachefs/extents.h:62 [inline]
RIP: 0010:bch2_ptr_swab+0x4f6/0x510 fs/bcachefs/extents.c:1313
Code: 60 60 cf fd e9 ae fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 5f fc ff ff 4c 89 f7 e8 45 60 cf fd e9 52 fc ff ff e8 db aa 65 fd 90 <0f> 0b e8 d3 aa 65 fd 90 0f 0b e8 cb aa 65 fd 90 0f 0b 0f 1f 84 00
RSP: 0018:ffffc9000aee64a0 EFLAGS: 00010293
RAX: ffffffff842f3d25 RBX: 0000000000000024 RCX: ffff888000d22440
RDX: 0000000000000000 RSI: 0000000000000024 RDI: 0000000000000005
RBP: 1e0e005000000000 R08: ffffffff842f3a13 R09: ffffffff842f387e
R10: 0000000000000005 R11: ffff888000d22440 R12: dffffc0000000000
R13: ffff888047881050 R14: ffff888047881060 R15: 1ffff11008f1020a
FS:  000055557cc8e380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b528cde220 CR3: 000000004105a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_bkey_swab_val fs/bcachefs/bkey_methods.c:323 [inline]
 __bch2_bkey_compat+0x4a2/0xfe0 fs/bcachefs/bkey_methods.c:469
 bch2_bkey_compat fs/bcachefs/bkey_methods.h:133 [inline]
 validate_bset_keys+0x617/0x1610 fs/bcachefs/btree_io.c:908
 bch2_btree_node_read_done+0x2402/0x5e90 fs/bcachefs/btree_io.c:1134
 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1327
 bch2_btree_node_read+0x2433/0x2a10
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1753 [inline]
 bch2_btree_root_read+0x617/0x7a0 fs/bcachefs/btree_io.c:1775
 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:524
 bch2_fs_recovery+0x2585/0x39c0 fs/bcachefs/recovery.c:854
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2174
 vfs_get_tree+0x90/0x2b0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 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: 0033:0x7ff1b36c0b7a
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:00007ffc62e862b8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc62e862d0 RCX: 00007ff1b36c0b7a
RDX: 0000000020000000 RSI: 0000000020005900 RDI: 00007ffc62e862d0
RBP: 0000000000000004 R08: 00007ffc62e86310 R09: 000000000000590d
R10: 0000000000010000 R11: 0000000000000282 R12: 0000000000010000
R13: 00007ffc62e86310 R14: 0000000000000003 R15: 0000000001000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:extent_entry_type fs/bcachefs/extents.h:62 [inline]
RIP: 0010:bch2_ptr_swab+0x4f6/0x510 fs/bcachefs/extents.c:1313
Code: 60 60 cf fd e9 ae fb ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 5f fc ff ff 4c 89 f7 e8 45 60 cf fd e9 52 fc ff ff e8 db aa 65 fd 90 <0f> 0b e8 d3 aa 65 fd 90 0f 0b e8 cb aa 65 fd 90 0f 0b 0f 1f 84 00
RSP: 0018:ffffc9000aee64a0 EFLAGS: 00010293
RAX: ffffffff842f3d25 RBX: 0000000000000024 RCX: ffff888000d22440
RDX: 0000000000000000 RSI: 0000000000000024 RDI: 0000000000000005
RBP: 1e0e005000000000 R08: ffffffff842f3a13 R09: ffffffff842f387e
R10: 0000000000000005 R11: ffff888000d22440 R12: dffffc0000000000
R13: ffff888047881050 R14: ffff888047881060 R15: 1ffff11008f1020a
FS:  000055557cc8e380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b528cde220 CR3: 000000004105a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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