IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
hfs: unable to locate alternate MDB
hfs: continuing without an alternate MDB
general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 1 PID: 4449 Comm: syz-executor4 Not tainted 5.6.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hfs_find_init+0x73/0x180 fs/hfs/bfind.c:21
Code: ea 03 80 3c 02 00 0f 85 ee 00 00 00 4d 8d 6c 24 40 48 c7 43 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 ac 00 00 00 41 8b 44 24 40 be
RSP: 0018:ffff8881c5867330 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881c58673b0 RCX: 1ffff1103915d685
RDX: 0000000000000008 RSI: ffff8881c58673b0 RDI: ffff8881c58673c8
RBP: ffff8881c5867350 R08: 0000000000000000 R09: ffff8881c5867410
R10: 0000000000000000 R11: ffff8881c595f6cf R12: 0000000000000000
R13: 0000000000000040 R14: ffff8881c595f772 R15: ffff8881c58673b0
FS:  00007f8c694c6700(0000) GS:ffff8881db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2dc7d2a000 CR3: 00000001c77cb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hfs_ext_read_extent+0x17e/0xcc0 fs/hfs/extent.c:200
 hfs_get_block+0x490/0x850 fs/hfs/extent.c:366
 block_read_full_page+0x288/0x950 fs/buffer.c:2285
 hfs_readpage+0x13/0x20 fs/hfs/inode.c:38
 do_read_cache_page+0x65c/0x12d0 mm/filemap.c:2761
 read_cache_page+0x45/0x70 mm/filemap.c:2852
 read_mapping_page include/linux/pagemap.h:396 [inline]
 hfs_btree_open+0x45f/0x1070 fs/hfs/btree.c:78
 hfs_mdb_get+0x1329/0x1d86 fs/hfs/mdb.c:193
 hfs_fill_super+0x9b4/0x12a0 fs/hfs/super.c:407
 mount_bdev+0x27b/0x340 fs/super.c:1417
 hfs_mount+0x10/0x20 fs/hfs/super.c:457
 legacy_get_tree+0x103/0x1f0 fs/fs_context.c:622
 vfs_get_tree+0x8b/0x2d0 fs/super.c:1547
 do_new_mount fs/namespace.c:2822 [inline]
 do_mount+0x1285/0x1b70 fs/namespace.c:3107
 __do_sys_mount fs/namespace.c:3316 [inline]
 __se_sys_mount fs/namespace.c:3293 [inline]
 __x64_sys_mount+0x169/0x1c0 fs/namespace.c:3293
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4579fa
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8f fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ba 8f fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f8c694c5bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 00000000004579fa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f8c694c5c00
RBP: 0000000000000003 R08: 00000000200001c0 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 0000000000000666 R14: 00000000006fba30 R15: 0000000000000000
Modules linked in:
---[ end trace d8af2f85c92eb8e6 ]---
RIP: 0010:hfs_find_init+0x73/0x180 fs/hfs/bfind.c:21
Code: ea 03 80 3c 02 00 0f 85 ee 00 00 00 4d 8d 6c 24 40 48 c7 43 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 ac 00 00 00 41 8b 44 24 40 be
RSP: 0018:ffff8881c5867330 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff8881c58673b0 RCX: 1ffff1103915d685
RDX: 0000000000000008 RSI: ffff8881c58673b0 RDI: ffff8881c58673c8
RBP: ffff8881c5867350 R08: 0000000000000000 R09: ffff8881c5867410
R10: 0000000000000000 R11: ffff8881c595f6cf R12: 0000000000000000
R13: 0000000000000040 R14: ffff8881c595f772 R15: ffff8881c58673b0
FS:  00007f8c694c6700(0000) GS:ffff8881db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2dc7d2a000 CR3: 00000001c77cb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400