syzbot


invalid opcode in hfsplus_bnode_put

Status: moderation: reported on 2024/10/24 00:43
Subsystems: hfs
[Documentation on labels]
Reported-by: syzbot+fddb457b4a8fa8df520f@syzkaller.appspotmail.com
First crash: 48d, last: 48d

Sample crash report:
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5108 Comm: syz.0.0 Not tainted 6.12.0-rc3-syzkaller-00389-g3d5ad2d4eca3 #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:hfsplus_bnode_put+0x510/0x520 fs/hfsplus/bnode.c:618
Code: ff e9 bf fe ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c f3 fe ff ff 4c 89 ef e8 fb e1 77 ff e9 e6 fe ff ff e8 91 1d 0e ff 90 <0f> 0b e8 89 1d 0e ff 90 0f 0b 66 0f 1f 44 00 00 90 90 90 90 90 90
RSP: 0018:ffffc9000b04f070 EFLAGS: 00010287
RAX: ffffffff8286ca6f RBX: ffff88801271b180 RCX: 0000000000040000
RDX: ffffc9000b811000 RSI: 000000000000324c RDI: 000000000000324d
RBP: 0000000000000000 R08: ffffffff8286c5e0 R09: 1ffff110024e3630
R10: dffffc0000000000 R11: ffffed10024e3631 R12: ffff88801271b100
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888036fca000
FS:  00007f6d578596c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d57816f98 CR3: 000000003313a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_bmap_alloc+0x590/0x640 fs/hfsplus/btree.c:414
 hfs_bnode_split+0xde/0x1110 fs/hfsplus/brec.c:245
 hfsplus_brec_insert+0x3a6/0xde0 fs/hfsplus/brec.c:100
 hfsplus_create_cat+0x49f/0x1b70 fs/hfsplus/catalog.c:292
 hfsplus_mknod+0x16a/0x2a0 fs/hfsplus/dir.c:494
 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: 0033:0x7f6d5697dff9
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:00007f6d57859038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f6d56b35f80 RCX: 00007f6d5697dff9
RDX: 000000000000014a RSI: 0000000000000041 RDI: 0000000020001500
RBP: 00007f6d569f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6d56b35f80 R15: 00007ffdd0743808
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfsplus_bnode_put+0x510/0x520 fs/hfsplus/bnode.c:618
Code: ff e9 bf fe ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c f3 fe ff ff 4c 89 ef e8 fb e1 77 ff e9 e6 fe ff ff e8 91 1d 0e ff 90 <0f> 0b e8 89 1d 0e ff 90 0f 0b 66 0f 1f 44 00 00 90 90 90 90 90 90
RSP: 0018:ffffc9000b04f070 EFLAGS: 00010287
RAX: ffffffff8286ca6f RBX: ffff88801271b180 RCX: 0000000000040000
RDX: ffffc9000b811000 RSI: 000000000000324c RDI: 000000000000324d
RBP: 0000000000000000 R08: ffffffff8286c5e0 R09: 1ffff110024e3630
R10: dffffc0000000000 R11: ffffed10024e3631 R12: ffff88801271b100
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffff888036fca000
FS:  00007f6d578596c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6d57816f98 CR3: 000000003313a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/20 00:39 upstream 3d5ad2d4eca3 cd6fc0a3 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root invalid opcode in hfsplus_bnode_put
* Struck through repros no longer work on HEAD.