syzbot


general protection fault in run_lookup_entry

Status: auto-obsoleted due to no activity on 2023/05/18 09:36
Subsystems: ntfs3
[Documentation on labels]
Reported-by: syzbot+fe84bc9bd94f9c2a63d7@syzkaller.appspotmail.com
First crash: 448d, last: 448d

Sample crash report:
general protection fault, probably for non-canonical address 0xfff10c05364c7000: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0xff888029b2638000-0xff888029b2638007]
CPU: 0 PID: 13521 Comm: syz-executor.3 Not tainted 6.2.0-rc8-syzkaller-00083-g3ac88fa4605e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
RIP: 0010:run_lookup fs/ntfs3/run.c:49 [inline]
RIP: 0010:run_lookup_entry+0x8c/0x560 fs/ntfs3/run.c:203
Code: 48 89 df e8 d6 6c 0f ff 48 8b 1b 31 ff 48 89 de e8 b9 37 ba fe 48 85 db 74 48 48 89 6c 24 20 48 89 1c 24 4c 89 e8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 92 03 00 00 41 8b 5d 00 89 df 44 89 fe
RSP: 0018:ffffc900051371d8 EFLAGS: 00010a06
RAX: 1ff11005364c7000 RBX: 00000000000001ff RCX: ffff88807ade1d40
RDX: ffffc9000bdb2000 RSI: 00000000000001ff RDI: 0000000000000000
RBP: ffffc90005137500 R08: ffffffff82d19ed7 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ff888029b2638000 R14: 0000000000000000 R15: 0000000000000004
FS:  00007fb9ee704700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32032000 CR3: 000000007de89000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 attr_set_size+0x1e40/0x4290 fs/ntfs3/attrib.c:543
 ntfs_set_size+0x161/0x1f0 fs/ntfs3/inode.c:823
 ntfs_extend+0x153/0x490 fs/ntfs3/file.c:337
 ntfs_file_write_iter+0x308/0x6d0 fs/ntfs3/file.c:1064
 do_iter_write+0x6ea/0xc50 fs/read_write.c:861
 iter_file_splice_write+0x80a/0xfa0 fs/splice.c:686
 do_splice_from fs/splice.c:764 [inline]
 direct_splice_actor+0xe7/0x1c0 fs/splice.c:931
 splice_direct_to_actor+0x4c4/0xbd0 fs/splice.c:886
 do_splice_direct+0x283/0x3d0 fs/splice.c:974
 do_sendfile+0x620/0xff0 fs/read_write.c:1255
 __do_sys_sendfile64 fs/read_write.c:1323 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1309
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb9eda8c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007fb9ee704168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fb9edbabf80 RCX: 00007fb9eda8c0f9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007fb9edae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1ae918bf R14: 00007fb9ee704300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:run_lookup fs/ntfs3/run.c:49 [inline]
RIP: 0010:run_lookup_entry+0x8c/0x560 fs/ntfs3/run.c:203
Code: 48 89 df e8 d6 6c 0f ff 48 8b 1b 31 ff 48 89 de e8 b9 37 ba fe 48 85 db 74 48 48 89 6c 24 20 48 89 1c 24 4c 89 e8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 92 03 00 00 41 8b 5d 00 89 df 44 89 fe
RSP: 0018:ffffc900051371d8 EFLAGS: 00010a06
RAX: 1ff11005364c7000 RBX: 00000000000001ff RCX: ffff88807ade1d40
RDX: ffffc9000bdb2000 RSI: 00000000000001ff RDI: 0000000000000000
RBP: ffffc90005137500 R08: ffffffff82d19ed7 R09: 0000000000000000
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ff888029b2638000 R14: 0000000000000000 R15: 0000000000000004
FS:  00007fb9ee704700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff353e29718 CR3: 000000007de89000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 89 df             	mov    %rbx,%rdi
   3:	e8 d6 6c 0f ff       	callq  0xff0f6cde
   8:	48 8b 1b             	mov    (%rbx),%rbx
   b:	31 ff                	xor    %edi,%edi
   d:	48 89 de             	mov    %rbx,%rsi
  10:	e8 b9 37 ba fe       	callq  0xfeba37ce
  15:	48 85 db             	test   %rbx,%rbx
  18:	74 48                	je     0x62
  1a:	48 89 6c 24 20       	mov    %rbp,0x20(%rsp)
  1f:	48 89 1c 24          	mov    %rbx,(%rsp)
  23:	4c 89 e8             	mov    %r13,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 92 03 00 00    	jne    0x3c9
  37:	41 8b 5d 00          	mov    0x0(%r13),%ebx
  3b:	89 df                	mov    %ebx,%edi
  3d:	44 89 fe             	mov    %r15d,%esi

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/17 09:33 upstream 3ac88fa4605e 851bc19a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in run_lookup_entry
* Struck through repros no longer work on HEAD.