ci2 starts bisection 2023-04-26 02:32:11.778793154 +0000 UTC m=+49430.076068046
bisecting fixing commit since 8020ae3c051d1c9ec7b7a872e226f9720547649b
building syzkaller on 7939252e4ddf50bbb9912069a40d32f6c83c4f8e
ensuring issue is reproducible on original commit 8020ae3c051d1c9ec7b7a872e226f9720547649b
testing commit 8020ae3c051d1c9ec7b7a872e226f9720547649b gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 4191e3d3e9f94ff1fd364fd4063d58bd5463a0c2beb6a1dd239874382cb1ee53
all runs: crashed: KASAN: stack-out-of-bounds Read in profile_pc
testing current HEAD 3299fb36854fdc288bddc2c4d265f8a2e5105944
testing commit 3299fb36854fdc288bddc2c4d265f8a2e5105944 gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b13ec3aa25af6038aad3189ccbb9b2ab8fb22539ea1b141deddffbfebbedbb77
all runs: crashed: KASAN: stack-out-of-bounds Read in profile_pc
revisions tested: 2, total time: 1h7m44.163700813s (build: 1h0m10.029497756s, test: 6m46.487446925s)
the crash still happens on HEAD
commit msg: Linux 5.15.108
crash: KASAN: stack-out-of-bounds Read in profile_pc
==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc90002a6f660 by task sed/3964
CPU: 1 PID: 3964 Comm: sed Not tainted 5.15.108-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x163/0x213 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+0x7e/0xb0 kernel/profile.c:416
tick_sched_handle kernel/time/tick-sched.c:227 [inline]
tick_sched_timer+0x181/0x300 kernel/time/tick-sched.c:1420
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x49a/0xa60 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x367/0x8c0 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
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 92 e6 83 f8 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 87 7e 21 f8 65 8b 05 48 01 d7 76 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc90002a6f660 EFLAGS: 00000206
RAX: eb508d4d63462700 RBX: 1ffff9200054ded0 RCX: ffffffff9014af03
RDX: dffffc0000000000 RSI: ffffffff898aae40 RDI: 0000000000000001
RBP: ffffc90002a6f700 R08: dffffc0000000000 R09: fffffbfff2065b06
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200054decc R14: ffffc90002a6f680 R15: 0000000000000246
__debug_check_no_obj_freed lib/debugobjects.c:1009 [inline]
debug_check_no_obj_freed+0x58d/0x610 lib/debugobjects.c:1030
free_pages_prepare mm/page_alloc.c:1345 [inline]
free_pcp_prepare mm/page_alloc.c:1391 [inline]
free_unref_page_prepare+0x281/0xcf0 mm/page_alloc.c:3317
free_unref_page_list+0x1f7/0x8e0 mm/page_alloc.c:3433
release_pages+0x156f/0x17c0 mm/swap.c:963
tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:240 [inline]
tlb_flush_mmu mm/mmu_gather.c:247 [inline]
tlb_finish_mmu+0x146/0x2b0 mm/mmu_gather.c:338
exit_mmap+0x363/0x5b0 mm/mmap.c:3188
__mmput+0xc8/0x2f0 kernel/fork.c:1118
exit_mm+0x5cf/0x710 kernel/exit.c:548
do_exit+0x54a/0x1f70 kernel/exit.c:859
do_group_exit+0x201/0x2d0 kernel/exit.c:994
__do_sys_exit_group kernel/exit.c:1005 [inline]
__se_sys_exit_group kernel/exit.c:1003 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1003
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f00bdb46a90
Code: Unable to access opcode bytes at RIP 0x7f00bdb46a66.
RSP: 002b:00007fff23b4d208 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f00bdc37860 RCX: 00007f00bdb46a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000000
RBP: 00007f00bdc37860 R08: 00007fff23b4d080 R09: 00007fff23b4d160
R10: 00007fff23b4d0c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f00bdc3b658 R15: 0000000000000001
addr ffffc90002a6f660 is located in stack of task sed/3964 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:
ffffc90002a6f500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90002a6f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90002a6f600: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
^
ffffc90002a6f680: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90002a6f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
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 92 e6 83 f8 callq 0xf883e6a6
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 87 7e 21 f8 callq 0xf8217eb6 <-- trapping instruction
2f: 65 8b 05 48 01 d7 76 mov %gs:0x76d70148(%rip),%eax # 0x76d7017e
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