syzbot


WARNING: nested lock was not taken in filemap_get_read_batch

Status: auto-obsoleted due to no activity on 2023/06/23 14:18
Subsystems: mm fs
[Documentation on labels]
Reported-by: syzbot+f272cbd4a127b5ad5b5c@syzkaller.appspotmail.com
First crash: 393d, last: 393d

Sample crash report:
==================================
WARNING: Nested lock was not taken
6.3.0-rc3-syzkaller-00317-g65aca32efdcb #0 Not tainted
----------------------------------
syz-executor.5/27215 is trying to lock:
ffffffff8cf25420 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x40 include/linux/rcupdate.h:326

but this task is not holding:
general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 PID: 27215 Comm: syz-executor.5 Not tainted 6.3.0-rc3-syzkaller-00317-g65aca32efdcb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:print_lock_nested_lock_not_held kernel/locking/lockdep.c:4888 [inline]
RIP: 0010:__lock_acquire+0x10cd/0x1f80 kernel/locking/lockdep.c:5047
Code: 3c 30 00 48 8b 5c 24 78 74 12 48 89 df e8 5b f4 75 00 49 be 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 34 f4 75 00 48 8b 33 48 c7 c7 60
RSP: 0018:ffffc900112c6500 EFLAGS: 00010006
RAX: 0000000000000003 RBX: 0000000000000018 RCX: 1e666058b2514200
RDX: ffffc90005834000 RSI: 000000000000f4c9 RDI: 000000000000f4ca
RBP: ffff888017cf8000 R08: ffffffff816dfe9c R09: ffffed101730515b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888017cf8a30
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888017cf8808
FS:  00007f28a2f8e700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f28a2315889 CR3: 0000000027b98000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669
 rcu_lock_acquire+0x2e/0x40 include/linux/rcupdate.h:327
 rcu_read_lock include/linux/rcupdate.h:773 [inline]
 filemap_get_read_batch+0x174/0xc90 mm/filemap.c:2377
 filemap_get_pages+0x4b9/0x20c0 mm/filemap.c:2600
 filemap_read+0x45a/0x1170 mm/filemap.c:2693
 __kernel_read+0x422/0x8a0 fs/read_write.c:428
 integrity_kernel_read+0xb0/0xf0 security/integrity/iint.c:199
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:485 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:516 [inline]
 ima_calc_file_hash+0xa5b/0x1c00 security/integrity/ima/ima_crypto.c:573
 ima_collect_measurement+0x3a7/0x880 security/integrity/ima/ima_api.c:293
 process_measurement+0xfdb/0x1ce0 security/integrity/ima/ima_main.c:341
 ima_file_check+0xf1/0x170 security/integrity/ima/ima_main.c:539
 do_open fs/namei.c:3562 [inline]
 path_openat+0x280a/0x3170 fs/namei.c:3715
 do_filp_open+0x234/0x490 fs/namei.c:3742
 do_sys_openat2+0x13f/0x500 fs/open.c:1348
 do_sys_open fs/open.c:1364 [inline]
 __do_sys_open fs/open.c:1372 [inline]
 __se_sys_open fs/open.c:1368 [inline]
 __x64_sys_open+0x225/0x270 fs/open.c:1368
 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: 0033:0x7f28a228c0f9
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:00007f28a2f8e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f28a23ac050 RCX: 00007f28a228c0f9
RDX: 00000000000000f8 RSI: 0000000000000280 RDI: 0000000020000140
RBP: 00007f28a22e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd2394c9df R14: 00007f28a2f8e300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:print_lock_nested_lock_not_held kernel/locking/lockdep.c:4888 [inline]
RIP: 0010:__lock_acquire+0x10cd/0x1f80 kernel/locking/lockdep.c:5047
Code: 3c 30 00 48 8b 5c 24 78 74 12 48 89 df e8 5b f4 75 00 49 be 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 34 f4 75 00 48 8b 33 48 c7 c7 60
RSP: 0018:ffffc900112c6500 EFLAGS: 00010006
RAX: 0000000000000003 RBX: 0000000000000018 RCX: 1e666058b2514200
RDX: ffffc90005834000 RSI: 000000000000f4c9 RDI: 000000000000f4ca
RBP: ffff888017cf8000 R08: ffffffff816dfe9c R09: ffffed101730515b
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888017cf8a30
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff888017cf8808
FS:  00007f28a2f8e700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f28a2315889 CR3: 0000000027b98000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	3c 30                	cmp    $0x30,%al
   2:	00 48 8b             	add    %cl,-0x75(%rax)
   5:	5c                   	pop    %rsp
   6:	24 78                	and    $0x78,%al
   8:	74 12                	je     0x1c
   a:	48 89 df             	mov    %rbx,%rdi
   d:	e8 5b f4 75 00       	callq  0x75f46d
  12:	49 be 00 00 00 00 00 	movabs $0xdffffc0000000000,%r14
  19:	fc ff df
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	48 83 c3 18          	add    $0x18,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 34 f4 75 00       	callq  0x75f46d
  39:	48 8b 33             	mov    (%rbx),%rsi
  3c:	48                   	rex.W
  3d:	c7                   	.byte 0xc7
  3e:	c7                   	(bad)
  3f:	60                   	(bad)

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/03/25 14:18 upstream 65aca32efdcb fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING: nested lock was not taken in filemap_get_read_batch
* Struck through repros no longer work on HEAD.