lkml.org 
[lkml]   [2020]   [Mar]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
Subjectlinux-next test error: BUG: using __this_cpu_read() in preemptible code in __mod_memcg_state
From
Hello,

syzbot found the following crash on:

HEAD commit: b86a6a24 Add linux-next specific files for 20200306
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1766b731e00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9c79dccc623ccc6f
dashboard link: https://syzkaller.appspot.com/bug?extid=826543256ed3b8c37f62
compiler: gcc (GCC) 9.0.0 20181231 (experimental)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+826543256ed3b8c37f62@syzkaller.appspotmail.com

check_preemption_disabled: 3 callbacks suppressed
BUG: using __this_cpu_read() in preemptible [00000000] code: syz-fuzzer/9432
caller is __mod_memcg_state+0x27/0x1a0 mm/memcontrol.c:689
CPU: 1 PID: 9432 Comm: syz-fuzzer Not tainted 5.6.0-rc4-next-20200306-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
check_preemption_disabled lib/smp_processor_id.c:47 [inline]
__this_cpu_preempt_check.cold+0x84/0x90 lib/smp_processor_id.c:64
__mod_memcg_state+0x27/0x1a0 mm/memcontrol.c:689
__split_huge_page mm/huge_memory.c:2575 [inline]
split_huge_page_to_list+0x124b/0x3380 mm/huge_memory.c:2862
split_huge_page include/linux/huge_mm.h:167 [inline]
madvise_free_huge_pmd+0x873/0xb90 mm/huge_memory.c:1766
madvise_free_pte_range+0x6ff/0x2650 mm/madvise.c:584
walk_pmd_range mm/pagewalk.c:89 [inline]
walk_pud_range mm/pagewalk.c:160 [inline]
walk_p4d_range mm/pagewalk.c:193 [inline]
walk_pgd_range mm/pagewalk.c:229 [inline]
__walk_page_range+0xcfb/0x2070 mm/pagewalk.c:331
walk_page_range+0x1bd/0x3a0 mm/pagewalk.c:427
madvise_free_single_vma+0x384/0x550 mm/madvise.c:731
madvise_dontneed_free mm/madvise.c:819 [inline]
madvise_vma mm/madvise.c:958 [inline]
do_madvise mm/madvise.c:1161 [inline]
do_madvise+0x5ba/0x1b80 mm/madvise.c:1084
__do_sys_madvise mm/madvise.c:1189 [inline]
__se_sys_madvise mm/madvise.c:1187 [inline]
__x64_sys_madvise+0xae/0x120 mm/madvise.c:1187
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x460bf7
Code: 8b 24 24 48 8b 6c 24 10 48 83 c4 18 c3 cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 48 c7 c0 1c 00 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14
RSP: 002b:00007ffd6e086670 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000000460bf7
RDX: 0000000000000008 RSI: 000000000000a000 RDI: 000000c00029a000
RBP: 00007ffd6e0866b0 R08: 000000c000200000 R09: 000000c0002a4000
R10: 00007fffffffffff R11: 0000000000000246 R12: 0000000000000007
R13: 00007f30cae546d0 R14: 0000000000000080 R15: 00000000000000fa
BUG: using __this_cpu_add() in preemptible [00000000] code: syz-fuzzer/9432
caller is __mod_memcg_state+0xca/0x1a0 mm/memcontrol.c:697
CPU: 1 PID: 9432 Comm: syz-fuzzer Not tainted 5.6.0-rc4-next-20200306-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
check_preemption_disabled lib/smp_processor_id.c:47 [inline]
__this_cpu_preempt_check.cold+0x84/0x90 lib/smp_processor_id.c:64
__mod_memcg_state+0xca/0x1a0 mm/memcontrol.c:697
__split_huge_page mm/huge_memory.c:2575 [inline]
split_huge_page_to_list+0x124b/0x3380 mm/huge_memory.c:2862
split_huge_page include/linux/huge_mm.h:167 [inline]
madvise_free_huge_pmd+0x873/0xb90 mm/huge_memory.c:1766
madvise_free_pte_range+0x6ff/0x2650 mm/madvise.c:584
walk_pmd_range mm/pagewalk.c:89 [inline]
walk_pud_range mm/pagewalk.c:160 [inline]
walk_p4d_range mm/pagewalk.c:193 [inline]
walk_pgd_range mm/pagewalk.c:229 [inline]
__walk_page_range+0xcfb/0x2070 mm/pagewalk.c:331
walk_page_range+0x1bd/0x3a0 mm/pagewalk.c:427
madvise_free_single_vma+0x384/0x550 mm/madvise.c:731
madvise_dontneed_free mm/madvise.c:819 [inline]
madvise_vma mm/madvise.c:958 [inline]
do_madvise mm/madvise.c:1161 [inline]
do_madvise+0x5ba/0x1b80 mm/madvise.c:1084
__do_sys_madvise mm/madvise.c:1189 [inline]
__se_sys_madvise mm/madvise.c:1187 [inline]
__x64_sys_madvise+0xae/0x120 mm/madvise.c:1187
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x460bf7
Code: 8b 24 24 48 8b 6c 24 10 48 83 c4 18 c3 cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 48 c7 c0 1c 00 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14
RSP: 002b:00007ffd6e086670 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000000460bf7
RDX: 0000000000000008 RSI: 000000000000a000 RDI: 000000c00029a000
RBP: 00007ffd6e0866b0 R08: 000000c000200000 R09: 000000c0002a4000
R10: 00007fffffffffff R11: 0000000000000246 R12: 0000000000000007
R13: 00007f30cae546d0 R14: 0000000000000080 R15: 00000000000000fa
BUG: using __this_cpu_write() in preemptible [00000000] code: syz-fuzzer/9432
caller is __mod_memcg_state+0x87/0x1a0 mm/memcontrol.c:702
CPU: 1 PID: 9432 Comm: syz-fuzzer Not tainted 5.6.0-rc4-next-20200306-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
check_preemption_disabled lib/smp_processor_id.c:47 [inline]
__this_cpu_preempt_check.cold+0x84/0x90 lib/smp_processor_id.c:64
__mod_memcg_state+0x87/0x1a0 mm/memcontrol.c:702
__split_huge_page mm/huge_memory.c:2575 [inline]
split_huge_page_to_list+0x124b/0x3380 mm/huge_memory.c:2862
split_huge_page include/linux/huge_mm.h:167 [inline]
madvise_free_huge_pmd+0x873/0xb90 mm/huge_memory.c:1766
madvise_free_pte_range+0x6ff/0x2650 mm/madvise.c:584
walk_pmd_range mm/pagewalk.c:89 [inline]
walk_pud_range mm/pagewalk.c:160 [inline]
walk_p4d_range mm/pagewalk.c:193 [inline]
walk_pgd_range mm/pagewalk.c:229 [inline]
__walk_page_range+0xcfb/0x2070 mm/pagewalk.c:331
walk_page_range+0x1bd/0x3a0 mm/pagewalk.c:427
madvise_free_single_vma+0x384/0x550 mm/madvise.c:731
madvise_dontneed_free mm/madvise.c:819 [inline]
madvise_vma mm/madvise.c:958 [inline]
do_madvise mm/madvise.c:1161 [inline]
do_madvise+0x5ba/0x1b80 mm/madvise.c:1084
__do_sys_madvise mm/madvise.c:1189 [inline]
__se_sys_madvise mm/madvise.c:1187 [inline]
__x64_sys_madvise+0xae/0x120 mm/madvise.c:1187
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x460bf7
Code: 8b 24 24 48 8b 6c 24 10 48 83 c4 18 c3 cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 48 c7 c0 1c 00 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14
RSP: 002b:00007ffd6e086670 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000000460bf7
RDX: 0000000000000008 RSI: 000000000000a000 RDI: 000000c00029a000
RBP: 00007ffd6e0866b0 R08: 000000c000200000 R09: 000000c0002a4000
R10: 00007fffffffffff R11: 0000000000000246 R12: 0000000000000007
R13: 00007f30cae546d0 R14: 0000000000000080 R15: 00000000000000fa


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

\
 
 \ /
  Last update: 2020-03-07 22:06    [W:0.086 / U:10.240 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site