kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7973 Comm: syz-executor969 Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
task: ffff8880b3b88400 task.stack: ffff8880b30f0000
RIP: 0010:hfs_find_init+0x70/0x220 fs/hfs/bfind.c:21
RSP: 0018:ffff8880b30f7600 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000008 RSI: ffff8880b30f7668 RDI: ffff8880b30f7680
RBP: ffff8880b30f7668 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: ffff8880b3b88400 R12: 0000000000000004
R13: 0000000000000040 R14: ffff8880960f3772 R15: ffff8880b30f7668
FS: 00005555556cd300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1c30037028 CR3: 00000000b2cc1000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
hfs_ext_read_extent+0x15e/0x930 fs/hfs/extent.c:200
hfs_get_block+0x453/0x6d0 fs/hfs/extent.c:366
block_read_full_page+0x25e/0x8d0 fs/buffer.c:2316
do_read_cache_page+0x38e/0xc10 mm/filemap.c:2713
read_mapping_page include/linux/pagemap.h:398 [inline]
hfs_btree_open+0x667/0x1300 fs/hfs/btree.c:78
hfs_mdb_get+0x129c/0x1b40 fs/hfs/mdb.c:193
hfs_fill_super+0xcdb/0x1250 fs/hfs/super.c:413
mount_bdev+0x2b3/0x360 fs/super.c:1134
mount_fs+0x92/0x2a0 fs/super.c:1237
vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
vfs_kern_mount fs/namespace.c:1036 [inline]
do_new_mount fs/namespace.c:2572 [inline]
do_mount+0xe65/0x2a30 fs/namespace.c:2905
SYSC_mount fs/namespace.c:3121 [inline]
SyS_mount+0xa8/0x120 fs/namespace.c:3098
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7f1cd1c46afa
RSP: 002b:00007ffc0b4988a8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f1cd1c46afa
RDX: 0000000020000240 RSI: 0000000020000000 RDI: 00007ffc0b4988c0
RBP: 00007ffc0b4988c0 R08: 00007ffc0b498900 R09: 0000000000000248
R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000004
R13: 00005555556cd2c0 R14: 0000000000000000 R15: 00007ffc0b498900
Code: 48 c1 ea 03 80 3c 02 00 0f 85 ad 01 00 00 4c 8d 6b 40 48 c7 45 18 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 5c 01 00 00 8b 43 40 be c0
RIP: hfs_find_init+0x70/0x220 fs/hfs/bfind.c:21 RSP: ffff8880b30f7600
---[ end trace bcd7f801477eed7b ]---
----------------
Code disassembly (best guess):
0: 48 c1 ea 03 shr $0x3,%rdx
4: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
8: 0f 85 ad 01 00 00 jne 0x1bb
e: 4c 8d 6b 40 lea 0x40(%rbx),%r13
12: 48 c7 45 18 00 00 00 movq $0x0,0x18(%rbp)
19: 00
1a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
21: fc ff df
24: 4c 89 ea mov %r13,%rdx
27: 48 c1 ea 03 shr $0x3,%rdx
* 2b: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 74 08 je 0x3b
33: 3c 03 cmp $0x3,%al
35: 0f 8e 5c 01 00 00 jle 0x197
3b: 8b 43 40 mov 0x40(%rbx),%eax
3e: be .byte 0xbe
3f: c0 .byte 0xc0