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KASAN: stack-out-of-bounds Read in profile_pc

Status: upstream: reported C repro on 2023/03/21 15:14
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+ec0607ebe47049bb44b6@syzkaller.appspotmail.com
First crash: 197d, last: 4d02h
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2023/05/10 upstream (ToT) 16a8829130ca C [report] KASAN: stack-out-of-bounds Read in profile_pc
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 KASAN: stack-out-of-bounds Read in profile_pc C 201 12d 860d 0/2 upstream: reported C repro on 2021/05/27 02:31
linux-6.1 KASAN: stack-out-of-bounds Read in profile_pc origin:upstream C 6 36d 142d 0/3 upstream: reported C repro on 2023/05/15 01:52
upstream KASAN: stack-out-of-bounds Read in profile_pc kernel C error 764 6h28m 856d 0/25 upstream: reported C repro on 2021/05/31 07:15
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2023/04/26 02:31 1h08m bisect fix linux-5.15.y job log (0) log

Sample crash report:
==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc9000178f2c0 by task kworker/u4:1/144

CPU: 0 PID: 144 Comm: kworker/u4:1 Not tainted 5.15.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: phy4 ieee80211_iface_work
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
 profile_tick+0xd4/0x130 kernel/profile.c:416
 tick_sched_handle kernel/time/tick-sched.c:227 [inline]
 tick_sched_timer+0x237/0x3c0 kernel/time/tick-sched.c:1420
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x5d9/0xeb0 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x17b/0x570 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 52 d3 9d f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 37 44 2b f7 65 8b 05 b8 40 d6 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc9000178f2c0 EFLAGS: 00000206
RAX: 007ef8c8ca5f1500 RBX: 1ffff920002f1e5c RCX: ffffffff81633238
RDX: dffffc0000000000 RSI: ffffffff8a8afc80 RDI: 0000000000000001
RBP: ffffc9000178f350 R08: dffffc0000000000 R09: fffffbfff1f7662d
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff920002f1e58 R14: ffffc9000178f2e0 R15: 0000000000000246
 krc_this_cpu_unlock kernel/rcu/tree.c:3193 [inline]
 kvfree_call_rcu+0x523/0x8a0 kernel/rcu/tree.c:3584
 cfg80211_update_known_bss+0x16b/0x9e0
 cfg80211_bss_update+0x16d/0x20d0 net/wireless/scan.c:1732
 cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2449 [inline]
 cfg80211_inform_bss_frame_data+0xac6/0x2270 net/wireless/scan.c:2482
 ieee80211_bss_info_update+0x7a6/0xc80 net/mac80211/scan.c:190
 ieee80211_rx_bss_info net/mac80211/ibss.c:1123 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1614 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1843/0x2be0 net/mac80211/ibss.c:1643
 ieee80211_iface_process_skb net/mac80211/iface.c:1441 [inline]
 ieee80211_iface_work+0x78f/0xcc0 net/mac80211/iface.c:1495
 process_one_work+0x90d/0x1270 kernel/workqueue.c:2306
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
 kthread+0x3f6/0x4f0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>


addr ffffc9000178f2c0 is located in stack of task kworker/u4:1/144 at offset 0 in frame:
 _raw_spin_unlock_irqrestore+0x0/0x130 kernel/locking/spinlock.c:187

this frame has 1 object:
 [32, 40) 'flags.i.i.i.i'

Memory state around the buggy address:
 ffffc9000178f180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000178f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000178f280: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3
                                           ^
 ffffc9000178f300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000178f380: 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 00 f3 f3 f3
==================================================================
----------------
Code disassembly (best guess):
   0:	9c                   	pushfq
   1:	8f 44 24 20          	popq   0x20(%rsp)
   5:	42 80 3c 23 00       	cmpb   $0x0,(%rbx,%r12,1)
   a:	74 08                	je     0x14
   c:	4c 89 f7             	mov    %r14,%rdi
   f:	e8 52 d3 9d f7       	callq  0xf79dd366
  14:	f6 44 24 21 02       	testb  $0x2,0x21(%rsp)
  19:	75 4e                	jne    0x69
  1b:	41 f7 c7 00 02 00 00 	test   $0x200,%r15d
  22:	74 01                	je     0x25
  24:	fb                   	sti
  25:	bf 01 00 00 00       	mov    $0x1,%edi
* 2a:	e8 37 44 2b f7       	callq  0xf72b4466 <-- trapping instruction
  2f:	65 8b 05 b8 40 d6 75 	mov    %gs:0x75d640b8(%rip),%eax        # 0x75d640ee
  36:	85 c0                	test   %eax,%eax
  38:	74 3f                	je     0x79
  3a:	48                   	rex.W
  3b:	c7                   	.byte 0xc7
  3c:	04 24                	add    $0x24,%al
  3e:	0e                   	(bad)
  3f:	36                   	ss

Crashes (18):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/03/21 15:40 linux-5.15.y 8020ae3c051d 7939252e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/08/28 23:22 linux-5.15.y 5ddfe5cc8716 7ba13a15 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/05/14 08:45 linux-5.15.y b0ece631f84a 2b9ba477 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/09/30 15:55 linux-5.15.y b911329317b4 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/09/20 13:10 linux-5.15.y 35ecaa3632bf 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/08/28 21:35 linux-5.15.y 5ddfe5cc8716 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/08/26 08:39 linux-5.15.y f6f7927ac664 7ba13a15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/08/14 10:39 linux-5.15.y 24c4de4069cb 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/08/02 19:49 linux-5.15.y 09996673e313 b178af49 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/07/22 15:55 linux-5.15.y d54cfc420586 27cbe77f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/07/10 22:30 linux-5.15.y d54cfc420586 d47e94ee .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/06/29 05:23 linux-5.15.y 4af60700a60c ca69c785 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/06/28 03:53 linux-5.15.y f67653019430 4cd5bb25 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/06/15 05:36 linux-5.15.y 471e639e59d1 76decb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/06/15 05:06 linux-5.15.y 471e639e59d1 76decb82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/05/30 03:26 linux-5.15.y 1fe619a7d252 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/03/27 02:24 linux-5.15.y 115472395b0a fbf0499a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
2023/03/21 15:12 linux-5.15.y 8020ae3c051d 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: stack-out-of-bounds Read in profile_pc
* Struck through repros no longer work on HEAD.