syzbot


BUG: Bad page map (7)

Status: fixed on 2023/12/21 03:45
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+55cc72f8cc3a549119df@syzkaller.appspotmail.com
Fix commit: ce60f27bb62d mm: abstract moving to the next PFN
First crash: 172d, last: 146d
Cause bisection: introduced by (bisect log) :
commit 617c28ecab22d98a3809370eb6cb50fa24b7bfe1
Author: Yin Fengwei <fengwei.yin@intel.com>
Date: Wed Aug 2 15:14:05 2023 +0000

  filemap: batch PTE mappings

Crash: BUG: Bad page map (log)
Repro: C syz .config
  
Discussions (4)
Title Replies (including bot) Last reply
[PATCH 2/2] mm: Abstract moving to the next PFN 3 (3) 2023/09/20 16:52
[PATCH 2/2] mm: Abstract moving to the next PFN 3 (3) 2023/09/20 09:19
[syzbot] [mm?] BUG: Bad page map (7) 20 (24) 2023/09/20 01:47
[willy@infradead.org: Re: [syzbot] [mm?] BUG: Bad page map (7)] 1 (1) 2023/09/11 14:57
Similar bugs (14)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 BUG: Bad page map 1 354d 354d 0/2 auto-obsoleted due to no activity on 2023/06/05 15:46
linux-4.19 BUG: Bad page map (3) 1 586d 586d 0/1 auto-obsoleted due to no activity on 2022/11/15 21:40
upstream BUG: Bad page map (5) mm io-uring C 35 407d 665d 22/26 fixed on 2023/02/24 13:50
linux-4.19 BUG: Bad page map (2) 10 773d 953d 0/1 auto-closed as invalid on 2022/05/13 11:22
upstream BUG: Bad page map (2) mm syz 127 1999d 2055d 0/26 closed as invalid on 2018/09/05 12:51
android-5-10 BUG: Bad page map (2) 1 136d 136d 0/2 auto-obsoleted due to no activity on 2024/01/10 02:50
upstream BUG: Bad page map mm 1 2058d 2058d 0/26 closed as invalid on 2018/07/08 13:28
upstream BUG: Bad page map (3) kernel 4 1868d 1994d 0/26 auto-closed as invalid on 2019/07/13 00:02
linux-4.19 BUG: Bad page map 2 1270d 1328d 0/1 auto-closed as invalid on 2021/01/01 08:20
android-54 BUG: Bad page map (2) 7 135d 254d 0/2 auto-obsoleted due to no activity on 2024/01/10 18:32
upstream BUG: Bad page map (4) mm 39 814d 1450d 0/26 auto-closed as invalid on 2022/04/02 04:25
linux-4.14 BUG: Bad page map 1 1315d 1315d 0/1 auto-closed as invalid on 2020/11/16 16:05
upstream BUG: Bad page map (6) mm 1 321d 317d 0/26 auto-obsoleted due to no activity on 2023/07/09 13:20
android-54 BUG: Bad page map 1 549d 549d 0/2 auto-obsoleted due to no activity on 2022/12/23 04:05
Last patch testing requests (22)
Created Duration User Patch Repo Result
2023/09/15 12:28 18m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 OK log
2023/09/15 12:00 14m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 report log
2023/09/14 12:32 37m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 OK log
2023/09/14 12:14 14m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 report log
2023/09/13 04:49 14m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 report log
2023/09/12 11:20 13m hdanton@sina.com patch upstream report log
2023/09/11 13:26 25m willy@infradead.org patch upstream OK log
2023/09/11 09:46 14m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 report log
2023/09/11 07:12 22m fengwei.yin@intel.com patch upstream OK log
2023/09/11 05:38 20m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 error OK
2023/09/10 11:48 47m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/09/10 08:13 23m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 OK log
2023/09/10 07:31 6m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 error OK
2023/09/10 06:07 17m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/09/10 06:03 13m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 report log
2023/09/10 06:01 4m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3bd786f76de2 error OK
2023/09/10 05:36 7m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3bd786f76de2 error OK
2023/09/10 04:30 22m eadavis@sina.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3bd786f76de2 OK log
2023/09/10 04:03 14m eadavis@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 3f86ed6ec0b3 report log
2023/09/10 03:02 14m willy@infradead.org patch upstream report log
2023/09/10 02:37 13m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2023/09/10 01:26 21m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master error OK

Sample crash report:
BUG: Bad page map in process syz-executor284  pte:fffff8d464120 pmd:74843067
page:ffffea0001cae6c0 refcount:9 mapcount:-1 mapping:ffff888076470410 index:0x3 pfn:0x72b9b
head:ffffea0001cae600 order:2 entire_mapcount:0 nr_pages_mapped:8388607 pincount:0
memcg:ffff888015e5a000
aops:xfs_address_space_operations ino:244a dentry name:"bus"
flags: 0xfff0000000816c(referenced|uptodate|lru|active|private|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea0001cae601 dead000000000122 dead000000000400
raw: 0000000000000001 0000000000000000 00000000fffffffe 0000000000000000
head: 00fff0000000816c ffffea0001d1b008 ffff888013245030 ffff888076470410
head: 0000000000000000 ffff88814567a100 00000009ffffffff ffff888015e5a000
page dumped because: bad pte
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Movable, gfp_mask 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5032, tgid 5032 (syz-executor284), ts 65940832270, free_ts 22284310038
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536
 prep_new_page mm/page_alloc.c:1543 [inline]
 get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426
 folio_alloc+0x1e/0x60 mm/mempolicy.c:2308
 filemap_alloc_folio+0xde/0x500 mm/filemap.c:976
 ra_alloc_folio mm/readahead.c:468 [inline]
 page_cache_ra_order+0x423/0xcc0 mm/readahead.c:524
 do_sync_mmap_readahead+0x444/0x850
 filemap_fault+0x7d3/0x1710 mm/filemap.c:3291
 __xfs_filemap_fault+0x286/0x960 fs/xfs/xfs_file.c:1354
 __do_fault+0x133/0x4e0 mm/memory.c:4204
 do_read_fault mm/memory.c:4568 [inline]
 do_fault mm/memory.c:4705 [inline]
 do_pte_missing mm/memory.c:3669 [inline]
 handle_pte_fault mm/memory.c:4978 [inline]
 __handle_mm_fault mm/memory.c:5119 [inline]
 handle_mm_fault+0x48d2/0x6200 mm/memory.c:5284
 faultin_page mm/gup.c:956 [inline]
 __get_user_pages+0x6bd/0x15e0 mm/gup.c:1239
 __get_user_pages_locked mm/gup.c:1504 [inline]
 get_dump_page+0x146/0x2b0 mm/gup.c:2018
 dump_user_range+0x126/0x910 fs/coredump.c:913
 elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142
 do_coredump+0x1b73/0x2ab0 fs/coredump.c:764
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1136 [inline]
 free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405
 free_contig_range+0x9e/0x150 mm/page_alloc.c:6342
 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028
 debug_vm_pgtable+0x4ac/0x540 mm/debug_vm_pgtable.c:1408
 do_one_initcall+0x23d/0x7d0 init/main.c:1232
 do_initcall_level+0x157/0x210 init/main.c:1294
 do_initcalls+0x3f/0x80 init/main.c:1310
 kernel_init_freeable+0x440/0x5d0 init/main.c:1547
 kernel_init+0x1d/0x2a0 init/main.c:1437
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
addr:0000000020006000 vm_flags:080000d0 anon_vma:0000000000000000 mapping:ffff888076470410 index:5
file:bus fault:xfs_filemap_fault mmap:xfs_file_mmap read_folio:xfs_vm_read_folio
CPU: 1 PID: 5032 Comm: syz-executor284 Not tainted 6.6.0-rc1-syzkaller-00033-g3669558bdf35 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_bad_pte+0x581/0x5c0 mm/memory.c:535
 zap_pte_range mm/memory.c:1458 [inline]
 zap_pmd_range mm/memory.c:1573 [inline]
 zap_pud_range mm/memory.c:1602 [inline]
 zap_p4d_range mm/memory.c:1623 [inline]
 unmap_page_range+0x1a76/0x3300 mm/memory.c:1644
 unmap_vmas+0x209/0x3a0 mm/memory.c:1731
 exit_mmap+0x297/0xc50 mm/mmap.c:3210
 __mmput+0x115/0x3c0 kernel/fork.c:1349
 exit_mm+0x21f/0x300 kernel/exit.c:567
 do_exit+0x612/0x2290 kernel/exit.c:861
 do_group_exit+0x206/0x2c0 kernel/exit.c:1024
 get_signal+0x175d/0x1840 kernel/signal.c:2892
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f10ea512eb9
Code: Unable to access opcode bytes at 0x7f10ea512e8f.
RSP: 002b:00007ffe74043128 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffe5 RBX: 0000000000000003 RCX: 00007f10ea512eb9
RDX: 0000000000000002 RSI: 0000000020000300 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 00000000000f4240
R13: 00007ffe740433a8 R14: 0000000000000001 R15: 00007ffe74043170
 </TASK>
BUG: Bad page map in process syz-executor284  pte:fffff8d465120 pmd:74843067
page:ffffea0001cae680 refcount:9 mapcount:-1 mapping:ffff888076470410 index:0x2 pfn:0x72b9a
head:ffffea0001cae600 order:2 entire_mapcount:0 nr_pages_mapped:8388606 pincount:0
memcg:ffff888015e5a000
aops:xfs_address_space_operations ino:244a dentry name:"bus"
flags: 0xfff0000000816c(referenced|uptodate|lru|active|private|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea0001cae601 ffffea0001cae690 ffffea0001cae690
raw: 0000000000000001 0000000000000000 00000000fffffffe 0000000000000000
head: 00fff0000000816c ffffea0001d1b008 ffff888013245030 ffff888076470410
head: 0000000000000000 ffff88814567a100 00000009ffffffff ffff888015e5a000
page dumped because: bad pte
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Movable, gfp_mask 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5032, tgid 5032 (syz-executor284), ts 65940832270, free_ts 22284300404
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536
 prep_new_page mm/page_alloc.c:1543 [inline]
 get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426
 folio_alloc+0x1e/0x60 mm/mempolicy.c:2308
 filemap_alloc_folio+0xde/0x500 mm/filemap.c:976
 ra_alloc_folio mm/readahead.c:468 [inline]
 page_cache_ra_order+0x423/0xcc0 mm/readahead.c:524
 do_sync_mmap_readahead+0x444/0x850
 filemap_fault+0x7d3/0x1710 mm/filemap.c:3291
 __xfs_filemap_fault+0x286/0x960 fs/xfs/xfs_file.c:1354
 __do_fault+0x133/0x4e0 mm/memory.c:4204
 do_read_fault mm/memory.c:4568 [inline]
 do_fault mm/memory.c:4705 [inline]
 do_pte_missing mm/memory.c:3669 [inline]
 handle_pte_fault mm/memory.c:4978 [inline]
 __handle_mm_fault mm/memory.c:5119 [inline]
 handle_mm_fault+0x48d2/0x6200 mm/memory.c:5284
 faultin_page mm/gup.c:956 [inline]
 __get_user_pages+0x6bd/0x15e0 mm/gup.c:1239
 __get_user_pages_locked mm/gup.c:1504 [inline]
 get_dump_page+0x146/0x2b0 mm/gup.c:2018
 dump_user_range+0x126/0x910 fs/coredump.c:913
 elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142
 do_coredump+0x1b73/0x2ab0 fs/coredump.c:764
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1136 [inline]
 free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405
 free_contig_range+0x9e/0x150 mm/page_alloc.c:6342
 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028
 debug_vm_pgtable+0x4ac/0x540 mm/debug_vm_pgtable.c:1408
 do_one_initcall+0x23d/0x7d0 init/main.c:1232
 do_initcall_level+0x157/0x210 init/main.c:1294
 do_initcalls+0x3f/0x80 init/main.c:1310
 kernel_init_freeable+0x440/0x5d0 init/main.c:1547
 kernel_init+0x1d/0x2a0 init/main.c:1437
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
addr:0000000020007000 vm_flags:080000d0 anon_vma:0000000000000000 mapping:ffff888076470410 index:6
file:bus fault:xfs_filemap_fault mmap:xfs_file_mmap read_folio:xfs_vm_read_folio
CPU: 0 PID: 5032 Comm: syz-executor284 Tainted: G    B              6.6.0-rc1-syzkaller-00033-g3669558bdf35 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_bad_pte+0x581/0x5c0 mm/memory.c:535
 zap_pte_range mm/memory.c:1458 [inline]
 zap_pmd_range mm/memory.c:1573 [inline]
 zap_pud_range mm/memory.c:1602 [inline]
 zap_p4d_range mm/memory.c:1623 [inline]
 unmap_page_range+0x1a76/0x3300 mm/memory.c:1644
 unmap_vmas+0x209/0x3a0 mm/memory.c:1731
 exit_mmap+0x297/0xc50 mm/mmap.c:3210
 __mmput+0x115/0x3c0 kernel/fork.c:1349
 exit_mm+0x21f/0x300 kernel/exit.c:567
 do_exit+0x612/0x2290 kernel/exit.c:861
 do_group_exit+0x206/0x2c0 kernel/exit.c:1024
 get_signal+0x175d/0x1840 kernel/signal.c:2892
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f10ea512eb9
Code: Unable to access opcode bytes at 0x7f10ea512e8f.
RSP: 002b:00007ffe74043128 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffe5 RBX: 0000000000000003 RCX: 00007f10ea512eb9
RDX: 0000000000000002 RSI: 0000000020000300 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 00000000000f4240
R13: 00007ffe740433a8 R14: 0000000000000001 R15: 00007ffe74043170
 </TASK>
BUG: Bad page map in process syz-executor284  pte:fffff8d466120 pmd:74843067
page:ffffea0001cae640 refcount:9 mapcount:-1 mapping:ffff888076470410 index:0x1 pfn:0x72b99
head:ffffea0001cae600 order:2 entire_mapcount:0 nr_pages_mapped:8388605 pincount:0
memcg:ffff888015e5a000
aops:xfs_address_space_operations ino:244a dentry name:"bus"
flags: 0xfff0000000816c(referenced|uptodate|lru|active|private|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000202 ffffea0001cae601 dead000000000122 fffffffdffffffff
raw: 0000000400000000 0000000000000000 00000000fffffffe 0000000000000000
head: 00fff0000000816c ffffea0001d1b008 ffff888013245030 ffff888076470410
head: 0000000000000000 ffff88814567a100 00000009ffffffff ffff888015e5a000
page dumped because: bad pte
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Movable, gfp_mask 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5032, tgid 5032 (syz-executor284), ts 65940832270, free_ts 22284290709
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536
 prep_new_page mm/page_alloc.c:1543 [inline]
 get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426
 folio_alloc+0x1e/0x60 mm/mempolicy.c:2308
 filemap_alloc_folio+0xde/0x500 mm/filemap.c:976
 ra_alloc_folio mm/readahead.c:468 [inline]
 page_cache_ra_order+0x423/0xcc0 mm/readahead.c:524
 do_sync_mmap_readahead+0x444/0x850
 filemap_fault+0x7d3/0x1710 mm/filemap.c:3291
 __xfs_filemap_fault+0x286/0x960 fs/xfs/xfs_file.c:1354
 __do_fault+0x133/0x4e0 mm/memory.c:4204
 do_read_fault mm/memory.c:4568 [inline]
 do_fault mm/memory.c:4705 [inline]
 do_pte_missing mm/memory.c:3669 [inline]
 handle_pte_fault mm/memory.c:4978 [inline]
 __handle_mm_fault mm/memory.c:5119 [inline]
 handle_mm_fault+0x48d2/0x6200 mm/memory.c:5284
 faultin_page mm/gup.c:956 [inline]
 __get_user_pages+0x6bd/0x15e0 mm/gup.c:1239
 __get_user_pages_locked mm/gup.c:1504 [inline]
 get_dump_page+0x146/0x2b0 mm/gup.c:2018
 dump_user_range+0x126/0x910 fs/coredump.c:913
 elf_core_dump+0x3b75/0x4490 fs/binfmt_elf.c:2142
 do_coredump+0x1b73/0x2ab0 fs/coredump.c:764
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1136 [inline]
 free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312
 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405
 free_contig_range+0x9e/0x150 mm/page_alloc.c:6342
 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028
 debug_vm_pgtable+0x4ac/0x540 mm/debug_vm_pgtable.c:1408
 do_one_initcall+0x23d/0x7d0 init/main.c:1232
 do_initcall_level+0x157/0x210 init/main.c:1294
 do_initcalls+0x3f/0x80 init/main.c:1310
 kernel_init_freeable+0x440/0x5d0 init/main.c:1547
 kernel_init+0x1d/0x2a0 init/main.c:1437
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
addr:0000000020008000 vm_flags:080000d0 anon_vma:0000000000000000 mapping:ffff888076470410 index:7
file:bus fault:xfs_filemap_fault mmap:xfs_file_mmap read_folio:xfs_vm_read_folio
CPU: 0 PID: 5032 Comm: syz-executor284 Tainted: G    B              6.6.0-rc1-syzkaller-00033-g3669558bdf35 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_bad_pte+0x581/0x5c0 mm/memory.c:535
 zap_pte_range mm/memory.c:1458 [inline]
 zap_pmd_range mm/memory.c:1573 [inline]
 zap_pud_range mm/memory.c:1602 [inline]
 zap_p4d_range mm/memory.c:1623 [inline]
 unmap_page_range+0x1a76/0x3300 mm/memory.c:1644
 unmap_vmas+0x209/0x3a0 mm/memory.c:1731
 exit_mmap+0x297/0xc50 mm/mmap.c:3210
 __mmput+0x115/0x3c0 kernel/fork.c:1349
 exit_mm+0x21f/0x300 kernel/exit.c:567
 do_exit+0x612/0x2290 kernel/exit.c:861
 do_group_exit+0x206/0x2c0 kernel/exit.c:1024
 get_signal+0x175d/0x1840 kernel/signal.c:2892
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f10ea512eb9
Code: Unable to access opcode bytes at 0x7f10ea512e8f.
RSP: 002b:00007ffe74043128 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffe5 RBX: 0000000000000003 RCX: 00007f10ea512eb9
RDX: 0000000000000002 RSI: 0000000020000300 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008800000 R11: 0000000000000246 R12: 00000000000f4240
R13: 00007ffe740433a8 R14: 0000000000000001 R15: 00007ffe74043170
 </TASK>

Crashes (19):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/09/13 10:50 upstream 3669558bdf35 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs BUG: Bad page map
2023/09/05 20:20 upstream 3f86ed6ec0b3 8bc9053e .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root BUG: Bad page map
2023/10/01 16:06 upstream e402b08634b3 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/10/01 12:47 upstream e402b08634b3 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/10/01 04:47 upstream 3b517966c561 8e26a358 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/09/28 21:07 upstream 9ed22ae6be81 d265efd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/09/27 02:53 upstream 50768a425b46 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/09/26 00:57 upstream 6465e260f487 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: Bad page map
2023/09/25 21:37 upstream 6465e260f487 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/09/22 22:00 upstream 27bbf45eae9c 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/09/15 15:10 upstream 9fdfb15a3dbf 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/09/10 02:34 upstream 6b8bb5b8d9b3 6654cf89 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: Bad page map
2023/09/06 10:05 upstream 7733171926cc 8bc9053e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce BUG: Bad page map
2023/09/05 19:55 upstream 3f86ed6ec0b3 8bc9053e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root BUG: Bad page map
2023/09/05 19:45 upstream 3f86ed6ec0b3 8bc9053e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root BUG: Bad page map
2023/09/05 17:00 upstream 3f86ed6ec0b3 0b6286dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs BUG: Bad page map
2023/09/20 08:47 upstream 2cf0f7156238 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 BUG: Bad page map
2023/09/18 08:44 upstream e789286468a9 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 BUG: Bad page map
2023/09/05 19:56 upstream 3f86ed6ec0b3 0b6286dc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream BUG: Bad page map
* Struck through repros no longer work on HEAD.