syzbot


KASAN: slab-use-after-free Write in collect_expired_timers

Status: auto-obsoleted due to no activity on 2024/02/20 10:29
Subsystems: reiserfs
[Documentation on labels]
Reported-by: syzbot+fb8d39ebb665f80c2ec1@syzkaller.appspotmail.com
First crash: 409d, last: 328d
Cause bisection: failed (error log, bisect log)
  
Fix bisection: failed (error log, bisect log)
  
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly fat report (Jul 2023) 3 (4) 2023/07/14 23:29
[syzbot] [reiserfs?] [fat?] [acpi?] KASAN: slab-use-after-free Write in collect_expired_timers 0 (1) 2023/06/22 17:39
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: use-after-free Write in collect_expired_timers arm 1 578d 574d 0/27 closed as dup on 2022/11/24 06:31
Last patch testing requests (2)
Created Duration User Patch Repo Result
2024/02/20 10:07 21m retest repro upstream OK log
2023/12/12 09:37 14m retest repro upstream report log
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/10/02 21:13 2h05m bisect fix upstream error job log (0)
2023/07/27 06:53 2h39m bisect fix upstream job log (0) log

Sample crash report:
BUG: unable to handle page fault for address: fffff5200002af99
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4993 Comm: syz-executor193 Not tainted 6.4.0-rc7-syzkaller-00072-gdad9774deaf1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:hlist_move_list include/linux/list.h:1029 [inline]
RIP: 0010:collect_expired_timers+0x13b/0x200 kernel/time/timer.c:1772
Code: 49 89 45 00 48 89 44 24 10 74 29 e8 bf 21 11 00 48 8b 44 24 10 48 b9 00 00 00 00 00 fc ff df 48 8d 78 08 48 89 fa 48 c1 ea 03 <80> 3c 0a 00 75 7a 4c 89 68 08 e8 96 21 11 00 4d 89 fd 49 c7 04 24
RSP: 0018:ffffc900001e0e20 EFLAGS: 00010016
RAX: ffffc90000157cc0 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 1ffff9200002af99 RSI: ffffffff81732551 RDI: ffffc90000157cc8
RBP: 00000000ffff9b50 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffff8880b993cf98 R12: ffff8880b99297e0
R13: ffffc900001e0eb8 R14: ffff8880b9929720 R15: ffffc900001e0ec0
FS:  00005555561173c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffff5200002af99 CR3: 0000000079098000 CR4: 0000000000350ee0
Call Trace:
 <IRQ>
----------------
Code disassembly (best guess):
   0:	49 89 45 00          	mov    %rax,0x0(%r13)
   4:	48 89 44 24 10       	mov    %rax,0x10(%rsp)
   9:	74 29                	je     0x34
   b:	e8 bf 21 11 00       	callq  0x1121cf
  10:	48 8b 44 24 10       	mov    0x10(%rsp),%rax
  15:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  1c:	fc ff df
  1f:	48 8d 78 08          	lea    0x8(%rax),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 0a 00          	cmpb   $0x0,(%rdx,%rcx,1) <-- trapping instruction
  2e:	75 7a                	jne    0xaa
  30:	4c 89 68 08          	mov    %r13,0x8(%rax)
  34:	e8 96 21 11 00       	callq  0x1121cf
  39:	4d 89 fd             	mov    %r15,%r13
  3c:	49                   	rex.WB
  3d:	c7                   	.byte 0xc7
  3e:	04 24                	add    $0x24,%al

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/22 17:39 upstream dad9774deaf1 09ffe269 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root BUG: unable to handle kernel paging request in collect_expired_timers
2023/05/07 19:05 net 27c1eaa07283 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce KASAN: slab-use-after-free Write in collect_expired_timers
* Struck through repros no longer work on HEAD.