syzbot


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

Status: upstream: reported C repro on 2021/05/31 07:15
Reported-by: syzbot+84fe685c02cd112a2ac3@syzkaller.appspotmail.com
First crash: 489d, last: 13h16m

Cause bisection: failed (bisect log)
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 KASAN: stack-out-of-bounds Read in profile_pc C 112 342d 489d 0/2 upstream: reported C repro on 2021/05/27 02:31
Patch testing requests:
Created Duration User Patch Repo Result
2021/06/14 17:36 12m chouhan.shreyansh630@gmail.com upstream report 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 ffffc9000307fc40 by task strace-static-x/3599

CPU: 1 PID: 3599 Comm: strace-static-x Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 print_address_description+0x65/0x4b0 mm/kasan/report.c:313
 print_report+0xf4/0x210 mm/kasan/report.c:429
 kasan_report+0xfb/0x130 mm/kasan/report.c:491
 profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
 profile_tick+0xc8/0x110 kernel/profile.c:336
 tick_sched_handle kernel/time/tick-sched.c:244 [inline]
 tick_sched_timer+0x381/0x540 kernel/time/tick-sched.c:1480
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4cb/0xa60 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x3a6/0xfd0 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0xf9/0x280 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [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 12 c7 a5 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 07 26 27 f7 65 8b 05 88 49 cd 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc9000307fc40 EFLAGS: 00000206
RAX: 76a0c0d77766fe00 RBX: 1ffff9200060ff8c RCX: ffffffff91549f03
RDX: dffffc0000000000 RSI: ffffffff8a8d2fe0 RDI: 0000000000000001
RBP: ffffc9000307fcd0 R08: dffffc0000000000 R09: ffffed100303c4e4
R10: ffffed100303c4e4 R11: 1ffff1100303c4e3 R12: dffffc0000000000
R13: 1ffff9200060ff88 R14: ffffc9000307fc60 R15: 0000000000000246
 task_rq_unlock kernel/sched/sched.h:1629 [inline]
 wait_task_inactive+0x32f/0x5a0 kernel/sched/core.c:3315
 ptrace_check_attach+0x179/0x360 kernel/ptrace.c:272
 __do_sys_ptrace kernel/ptrace.c:1291 [inline]
 __se_sys_ptrace+0x1d1/0x600 kernel/ptrace.c:1269
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x4e6c1a
Code: 70 41 83 f8 03 c7 44 24 10 08 00 00 00 48 89 44 24 18 48 8d 44 24 30 8b 70 08 4c 0f 43 d1 48 89 44 24 20 b8 65 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3e 48 85 c0 78 06 41 83 f8 02 76 1b 48 8b 4c
RSP: 002b:00007ffdd9d9ef20 EFLAGS: 00000206 ORIG_RAX: 0000000000000065
RAX: ffffffffffffffda RBX: 0000000000e4ca50 RCX: 00000000004e6c1a
RDX: 0000000000000058 RSI: 0000000000000e12 RDI: 000000000000420e
RBP: 00007ffdd9d9f020 R08: 000000000000420d R09: 0000000000000000
R10: 000000000063c820 R11: 0000000000000206 R12: 0000000000e4ca50
R13: 00007ffdd9d9f07c R14: 000000000000857f R15: 0000000000617180
 </TASK>

The buggy address belongs to stack of task strace-static-x/3599
 and is located 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'

The buggy address belongs to the virtual mapping at
 [ffffc90003078000, ffffc90003081000) created by:
 dup_task_struct+0x8b/0x490 kernel/fork.c:977

The buggy address belongs to the physical page:
page:ffffea00008771c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21dc7
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 3181, tgid 3181 (dhcpcd), ts 40983850505, free_ts 40981985923
 prep_new_page mm/page_alloc.c:2457 [inline]
 get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4203
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5431
 vm_area_alloc_pages mm/vmalloc.c:2927 [inline]
 __vmalloc_area_node mm/vmalloc.c:2995 [inline]
 __vmalloc_node_range+0x904/0x12e0 mm/vmalloc.c:3165
 alloc_thread_stack_node+0x307/0x500 kernel/fork.c:312
 dup_task_struct+0x8b/0x490 kernel/fork.c:977
 copy_process+0x641/0x3fe0 kernel/fork.c:2075
 kernel_clone+0x22f/0x7a0 kernel/fork.c:2659
 __do_sys_clone kernel/fork.c:2793 [inline]
 __se_sys_clone kernel/fork.c:2777 [inline]
 __x64_sys_clone+0x276/0x2e0 kernel/fork.c:2777
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1371 [inline]
 free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1421
 free_unref_page_prepare mm/page_alloc.c:3344 [inline]
 free_unref_page+0x7d/0x390 mm/page_alloc.c:3439
 free_slab mm/slub.c:2068 [inline]
 discard_slab mm/slub.c:2074 [inline]
 __unfreeze_partials+0x1ab/0x200 mm/slub.c:2548
 put_cpu_partial+0x116/0x180 mm/slub.c:2624
 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:447
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc_node mm/slub.c:3243 [inline]
 slab_alloc mm/slub.c:3251 [inline]
 __kmalloc+0x1bd/0x370 mm/slub.c:4420
 kmalloc include/linux/slab.h:605 [inline]
 tomoyo_add_entry security/tomoyo/common.c:2022 [inline]
 tomoyo_supervisor+0xd26/0x1310 security/tomoyo/common.c:2094
 tomoyo_audit_net_log security/tomoyo/network.c:367 [inline]
 tomoyo_audit_unix_log security/tomoyo/network.c:406 [inline]
 tomoyo_unix_entry security/tomoyo/network.c:574 [inline]
 tomoyo_check_unix_address+0x549/0x820 security/tomoyo/network.c:605
 tomoyo_socket_connect_permission+0x23c/0x370 security/tomoyo/network.c:709
 security_socket_connect+0x56/0xb0 security/security.c:2208
 __sys_connect_file net/socket.c:1975 [inline]
 __sys_connect+0x1d6/0x2d0 net/socket.c:1996
 __do_sys_connect net/socket.c:2006 [inline]
 __se_sys_connect net/socket.c:2003 [inline]
 __x64_sys_connect+0x76/0x80 net/socket.c:2003
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffffc9000307fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000307fb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000307fc00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3
                                           ^
 ffffc9000307fc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000307fd00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f2 f2
==================================================================
----------------
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 12 c7 a5 f7       	callq  0xf7a5c726
  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 07 26 27 f7       	callq  0xf7272636 <-- trapping instruction
  2f:	65 8b 05 88 49 cd 75 	mov    %gs:0x75cd4988(%rip),%eax        # 0x75cd49be
  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 (178):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2022/08/05 09:10 upstream 200e340f2196 1c9013ac .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/06/23 22:30 upstream de5c208d533a 912f5df7 .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/03/08 13:33 upstream ea4424be1688 7bdd8b2c .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/03/08 12:21 upstream ea4424be1688 7bdd8b2c .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/03/08 11:49 upstream ea4424be1688 7bdd8b2c .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/03/08 11:28 upstream ea4424be1688 7bdd8b2c .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/02/19 13:43 upstream 4f12b742eb2b 3cd800e4 .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/02/17 06:57 upstream 359303076163 2bea8a27 .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2021/06/03 08:01 upstream 324c92e5e0ee 0740de69 .config log report syz C KASAN: stack-out-of-bounds Read in profile_pc
ci2-upstream-fs 2022/09/28 02:00 upstream 46452d3786a8 75c78242 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci2-upstream-fs 2022/09/26 20:48 upstream f76349cf4145 d59ba983 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci2-upstream-fs 2022/09/25 11:51 upstream 3db61221f4e8 0042f2b4 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/09/22 21:53 upstream dc164f4fb00a 0042f2b4 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci2-upstream-fs 2022/09/22 05:19 upstream 06f7db949993 60af5050 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci2-upstream-fs 2022/09/20 04:16 upstream 521a547ced64 dd9a85ff .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci2-upstream-fs 2022/09/20 00:06 upstream 521a547ced64 dd9a85ff .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci2-upstream-fs 2022/09/19 14:17 upstream 521a547ced64 dd9a85ff .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/09/16 00:46 upstream 3245cb65fd91 dd9a85ff .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/09/14 17:06 upstream 3245cb65fd91 b884348d .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/09/13 07:16 upstream 6504d82f4440 f371ed7e .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/09/07 05:46 upstream d2ec799d1c1b 5fc30c37 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/09/06 06:03 upstream 53e99dcff61e 9dcd38fc .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/09/05 14:10 upstream 7e18e42e4b28 922294ab .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/09/01 09:11 upstream c5e4d5e99162 b01ec571 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/21 06:47 upstream 15b3f48a4339 26a13b38 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/17 14:33 upstream 7ebfc85e2cd7 4e72d229 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/13 21:40 upstream 7ebfc85e2cd7 8dfcaa3d .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/12 11:10 upstream 7ebfc85e2cd7 402cd70d .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/10 23:16 upstream 200e340f2196 a6201f11 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/09 05:29 upstream 200e340f2196 da700653 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/06 12:18 upstream 200e340f2196 e853abd9 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/06 10:51 upstream 200e340f2196 e853abd9 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/08/04 10:35 upstream 200e340f2196 1c9013ac .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/29 21:12 upstream 6e2c0490769e fef302b1 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/29 19:42 upstream 6e2c0490769e fef302b1 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/28 17:24 upstream 6e7765cb477a fb95c74d .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/26 08:54 upstream e0dccc3b76fb 34795c51 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/20 17:04 upstream ca85855bdcae 775344bc .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/19 02:14 upstream 80e19f34c288 ff988920 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/15 03:14 upstream 9bd572ec7a66 5d921b08 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/14 07:01 upstream 4a57a8400075 5d921b08 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/11 06:39 upstream d9919d43cbf6 b5765a15 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/07/01 10:06 upstream 1a0e93df1e10 1434eec0 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/06/24 03:15 upstream de5c208d533a 912f5df7 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/06/23 21:40 upstream de5c208d533a 912f5df7 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/06/12 16:46 upstream 7a68065eb9cd 0d5abf15 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/06/05 12:38 upstream 952923ddc011 c8857892 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/05/31 05:14 upstream 2c5ca23f7414 af70c3a9 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/05/30 14:00 upstream b00ed48bb0a7 a46af346 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/05/29 14:08 upstream 664a393a2663 a46af346 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/05/25 04:31 upstream aa051d36ce4a 647c0e27 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2022/05/21 23:45 upstream 6c3f5bec9b40 7268fa62 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-kasan-gce-smack-root 2021/05/27 02:41 upstream 7ac3a1c1ae51 858ea628 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-linux-next-kasan-gce-root 2022/09/23 12:56 linux-next aaa11ce2ffc8 0042f2b4 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-linux-next-kasan-gce-root 2022/09/15 09:45 linux-next e47eb90a0a9a dd9a85ff .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-linux-next-kasan-gce-root 2022/09/15 07:39 linux-next e47eb90a0a9a dd9a85ff .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-linux-next-kasan-gce-root 2022/09/03 23:09 linux-next e47eb90a0a9a 28811d0a .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-linux-next-kasan-gce-root 2022/08/26 04:39 linux-next b5d939c95186 15195ea3 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-linux-next-kasan-gce-root 2022/08/24 12:37 linux-next 68a00424bf69 cea8b0f7 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
ci-upstream-linux-next-kasan-gce-root 2022/08/23 11:53 linux-next 05477f3653b8 cea8b0f7 .config log report info KASAN: stack-out-of-bounds Read in profile_pc
* Struck through repros no longer work on HEAD.