linux-kernel - [syzbot] [btrfs?] general protection fault in btrfs_search

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Message-ID: <6719c407.050a0220.10f4f4.01dc.GAE@google.com>
Date: Wed, 23 Oct 2024 20:50:31 -0700
From: syzbot <syzbot+3030e17bd57a73d39bd7@...kaller.appspotmail.com>
To: clm@...com, dsterba@...e.com, josef@...icpanda.com, 
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [btrfs?] general protection fault in btrfs_search_slot

Hello,

syzbot found the following issue on:

HEAD commit:    715ca9dd687f Merge tag 'io_uring-6.12-20241019' of git://g..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16c620a7980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=16e543edc81a3008
dashboard link: https://syzkaller.appspot.com/bug?extid=3030e17bd57a73d39bd7
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=12c8825f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1417c430580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-715ca9dd.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ba436e2363b6/vmlinux-715ca9dd.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3ac78a7a1a30/bzImage-715ca9dd.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/2ff71deb6e6e/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3030e17bd57a73d39bd7@...kaller.appspotmail.com

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000041: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000208-0x000000000000020f]
CPU: 0 UID: 0 PID: 5098 Comm: syz-executor113 Not tainted 6.12.0-rc3-syzkaller-00420-g715ca9dd687f #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:btrfs_search_slot+0xc5/0x30d0 fs/btrfs/ctree.c:2013
Code: 08 43 c7 44 2c 10 04 f2 04 f3 e8 f6 ed e6 fd 48 89 5c 24 38 48 81 c3 08 02 00 00 48 89 d8 48 c1 e8 03 48 89 84 24 d0 00 00 00 <42> 80 3c 28 00 74 08 48 89 df e8 5c b2 50 fe 48 8b 03 48 89 84 24
RSP: 0018:ffffc90000e379e0 EFLAGS: 00010206
RAX: 0000000000000041 RBX: 0000000000000208 RCX: ffff888000ff4880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e37bb0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100826400e R12: 1ffff920001c6f58
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88803e569b00
FS:  0000555591c73380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcd50a190f8 CR3: 000000003deb2000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 extent_from_logical+0x1c8/0x880 fs/btrfs/backref.c:2216
 iterate_inodes_from_logical+0x13b/0x330 fs/btrfs/backref.c:2560
 btrfs_ioctl_logical_to_ino+0x133/0x2a0 fs/btrfs/ioctl.c:3489
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 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: 0033:0x7fcd5099cc59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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:00007ffdda2f7428 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcd5099cc59
RDX: 0000000020000080 RSI: 00000000c0389424 RDI: 0000000000000004
RBP: 00007fcd50a155f0 R08: 0000555591c744c0 R09: 0000555591c744c0
R10: 00000000000055c5 R11: 0000000000000246 R12: 00007ffdda2f7450
R13: 00007ffdda2f7678 R14: 431bde82d7b634db R15: 00007fcd509e503b
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btrfs_search_slot+0xc5/0x30d0 fs/btrfs/ctree.c:2013
Code: 08 43 c7 44 2c 10 04 f2 04 f3 e8 f6 ed e6 fd 48 89 5c 24 38 48 81 c3 08 02 00 00 48 89 d8 48 c1 e8 03 48 89 84 24 d0 00 00 00 <42> 80 3c 28 00 74 08 48 89 df e8 5c b2 50 fe 48 8b 03 48 89 84 24
RSP: 0018:ffffc90000e379e0 EFLAGS: 00010206
RAX: 0000000000000041 RBX: 0000000000000208 RCX: ffff888000ff4880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000e37bb0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100826400e R12: 1ffff920001c6f58
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88803e569b00
FS:  0000555591c73380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d064263098 CR3: 000000003deb2000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	08 43 c7             	or     %al,-0x39(%rbx)
   3:	44 2c 10             	rex.R sub $0x10,%al
   6:	04 f2                	add    $0xf2,%al
   8:	04 f3                	add    $0xf3,%al
   a:	e8 f6 ed e6 fd       	call   0xfde6ee05
   f:	48 89 5c 24 38       	mov    %rbx,0x38(%rsp)
  14:	48 81 c3 08 02 00 00 	add    $0x208,%rbx
  1b:	48 89 d8             	mov    %rbx,%rax
  1e:	48 c1 e8 03          	shr    $0x3,%rax
  22:	48 89 84 24 d0 00 00 	mov    %rax,0xd0(%rsp)
  29:	00
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 5c b2 50 fe       	call   0xfe50b295
  39:	48 8b 03             	mov    (%rbx),%rax
  3c:	48                   	rex.W
  3d:	89                   	.byte 0x89
  3e:	84                   	.byte 0x84
  3f:	24                   	.byte 0x24


---
This report is generated by a bot. It may contain errors.
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