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KASAN: stack-out-of-bounds Write in __stack_chk_fail

Status: closed as invalid on 2024/09/13 10:29
Subsystems: kernel
[Documentation on labels]
First crash: 182d, last: 181d
Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream BUG: scheduling while atomic in __stack_chk_fail kernel 3 180d 182d 0/28 closed as invalid on 2024/09/13 10:29

Sample crash report:
==================================================================
BUG: KASAN: stack-out-of-bounds in symbol_string+0xb6/0x3b0 lib/vsprintf.c:987
Write of size 666 at addr ffffc90004bcdcc0 by task syz.0.29/5430

CPU: 1 UID: 0 PID: 5430 Comm: syz.0.29 Not tainted 6.11.0-rc4-next-20240820-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memset+0x23/0x50 mm/kasan/shadow.c:84
 symbol_string+0xb6/0x3b0 lib/vsprintf.c:987
 pointer+0x8cb/0x1210 lib/vsprintf.c:2422
 vsnprintf+0xdb0/0x1da0 lib/vsprintf.c:2828
 vscnprintf+0x42/0x90 lib/vsprintf.c:2930
 panic+0x245/0x870 kernel/panic.c:342
 __stack_chk_fail+0x15/0x20 kernel/panic.c:827
 fixup_exception+0x1c89/0x1cc0
 </TASK>

The buggy address belongs to stack of task syz.0.29/5430
 and is located at offset 32 in frame:
 symbol_string+0x0/0x3b0

This frame has 1 object:
 [32, 698) 'sym'

The buggy address belongs to the virtual mapping at
 [ffffc90004bc8000, ffffc90004bd1000) created by:
 copy_process+0x5d1/0x3d50 kernel/fork.c:2206

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802dd51c00 pfn:0x2dd50
memcg:ffff888029f3a582
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: ffff88802dd51c00 0000000000000000 00000001ffffffff ffff888029f3a582
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 2, tgid 2 (kthreadd), ts 82249478251, free_ts 81559784884
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1517
 prep_new_page mm/page_alloc.c:1525 [inline]
 get_page_from_freelist+0x3004/0x30c0 mm/page_alloc.c:3476
 __alloc_pages_noprof+0x29e/0x780 mm/page_alloc.c:4743
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
 vm_area_alloc_pages mm/vmalloc.c:3600 [inline]
 __vmalloc_area_node mm/vmalloc.c:3669 [inline]
 __vmalloc_node_range_noprof+0xa40/0x1400 mm/vmalloc.c:3850
 alloc_thread_stack_node kernel/fork.c:314 [inline]
 dup_task_struct+0x444/0x8c0 kernel/fork.c:1115
 copy_process+0x5d1/0x3d50 kernel/fork.c:2206
 kernel_clone+0x226/0x8f0 kernel/fork.c:2787
 kernel_thread+0x1bc/0x240 kernel/fork.c:2849
 create_kthread kernel/kthread.c:412 [inline]
 kthreadd+0x60d/0x810 kernel/kthread.c:765
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page last free pid 5404 tgid 5404 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1098 [inline]
 free_unref_page+0xc07/0xd90 mm/page_alloc.c:2651
 __slab_free+0x31b/0x3d0 mm/slub.c:4432
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4036 [inline]
 slab_alloc_node mm/slub.c:4085 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4092
 ptlock_alloc+0x20/0x70 mm/memory.c:6596
 ptlock_init include/linux/mm.h:2895 [inline]
 pagetable_pte_ctor include/linux/mm.h:2922 [inline]
 __pte_alloc_one_noprof include/asm-generic/pgalloc.h:73 [inline]
 pte_alloc_one+0xcd/0x5d0 arch/x86/mm/pgtable.c:33
 __pte_alloc+0x79/0x3a0 mm/memory.c:448
 copy_pte_range mm/memory.c:1106 [inline]
 copy_pmd_range+0x7cca/0x8500 mm/memory.c:1252
 copy_pud_range mm/memory.c:1289 [inline]
 copy_p4d_range mm/memory.c:1313 [inline]
 copy_page_range+0x99f/0xe90 mm/memory.c:1411
 dup_mmap kernel/fork.c:750 [inline]
 dup_mm kernel/fork.c:1674 [inline]
 copy_mm+0x1203/0x1f50 kernel/fork.c:1723
 copy_process+0x1845/0x3d50 kernel/fork.c:2375
 kernel_clone+0x226/0x8f0 kernel/fork.c:2787
 __do_sys_clone kernel/fork.c:2930 [inline]
 __se_sys_clone kernel/fork.c:2914 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2914
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83

Memory state around the buggy address:
 ffffc90004bcdc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004bcdc80: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00
>ffffc90004bcdd00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2
                                           ^
 ffffc90004bcdd80: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004bcde00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/08/20 13:04 linux-next bb1b0acdcd66 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: stack-out-of-bounds Write in __stack_chk_fail
2024/08/21 12:39 linux-next eb8c5ca373cb db5852f9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root BUG: unable to handle kernel paging request in __stack_chk_fail
2024/08/20 20:39 linux-next bb1b0acdcd66 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in __stack_chk_fail
* Struck through repros no longer work on HEAD.