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KASAN: slab-use-after-free Read in filemap_map_pages

Status: upstream: reported C repro on 2025/01/01 04:06
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+14d047423f40dc1dac89@syzkaller.appspotmail.com
First crash: 299d, last: 22d
Cause bisection: the cause commit could be any of (bisect log):
  568570fdf2b9 Merge tag 'xfs-6.12-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
  6aca91c416f6 cifs: Remove unused functions
  b04ae0f45168 Merge tag 'v6.12-rc3-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
   
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [mm?] [xfs?] KASAN: slab-use-after-free Read in filemap_map_pages 1 (3) 2025/01/01 07:20
▶ ▼ Last patch testing requests (11)
Created Duration User Patch Repo Result
2025/09/15 14:31 19m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report log
2025/09/15 14:31 16m retest repro upstream report log
2025/06/13 11:40 23m retest repro linux-next OK log
2025/06/13 10:02 23m retest repro linux-next OK log
2025/06/13 10:02 39m retest repro linux-next OK log
2025/06/13 10:02 25m retest repro linux-next OK log
2025/06/13 10:02 23m retest repro linux-next OK log
2025/03/22 15:47 9m retest repro linux-next error
2025/03/22 15:47 12m retest repro linux-next error
2025/03/22 15:47 13m retest repro linux-next error
2025/01/01 06:50 29m hdanton@sina.com patch linux-next OK log

Sample crash report:
EXT4-fs error (device loop0): ext4_map_blocks:778: inode #15: block 3: comm syz.0.190: lblock 3 mapped to illegal pblock 3 (length 3)
EXT4-fs error (device loop0): ext4_map_blocks:778: inode #15: block 3: comm syz.0.190: lblock 3 mapped to illegal pblock 3 (length 3)
==================================================================
BUG: KASAN: use-after-free in __ptep_get arch/arm64/include/asm/pgtable.h:414 [inline]
BUG: KASAN: use-after-free in ptep_get arch/arm64/include/asm/pgtable.h:1749 [inline]
BUG: KASAN: use-after-free in filemap_map_folio_range mm/filemap.c:3666 [inline]
BUG: KASAN: use-after-free in filemap_map_pages+0xa94/0x155c mm/filemap.c:3783
Read of size 8 at addr ffff0000e34c6000 by task syz.0.190/7608

CPU: 0 UID: 0 PID: 7608 Comm: syz.0.190 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 print_address_description+0xa8/0x238 mm/kasan/report.c:378
 print_report+0x68/0x84 mm/kasan/report.c:482
 kasan_report+0xb0/0x110 mm/kasan/report.c:595
 __asan_report_load8_noabort+0x20/0x2c mm/kasan/report_generic.c:381
 __ptep_get arch/arm64/include/asm/pgtable.h:414 [inline]
 ptep_get arch/arm64/include/asm/pgtable.h:1749 [inline]
 filemap_map_folio_range mm/filemap.c:3666 [inline]
 filemap_map_pages+0xa94/0x155c mm/filemap.c:3783
 do_fault_around mm/memory.c:5531 [inline]
 do_read_fault mm/memory.c:5564 [inline]
 do_fault mm/memory.c:5707 [inline]
 do_pte_missing mm/memory.c:4234 [inline]
 handle_pte_fault mm/memory.c:6052 [inline]
 __handle_mm_fault mm/memory.c:6195 [inline]
 handle_mm_fault+0x2b64/0x4d34 mm/memory.c:6364
 faultin_page mm/gup.c:1144 [inline]
 __get_user_pages+0x1f40/0x2da0 mm/gup.c:1446
 populate_vma_page_range+0x258/0x348 mm/gup.c:1880
 __mm_populate+0x208/0x330 mm/gup.c:1983
 mm_populate include/linux/mm.h:3367 [inline]
 vm_mmap_pgoff+0x398/0x45c mm/util.c:585
 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:604
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff0000e34c6f50 pfn:0x1234c6
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: f0(buddy)
raw: 05ffc00000000000 fffffdffc38d3308 fffffdffc38bdb08 0000000000000000
raw: ffff0000e34c6f50 0000000000000001 00000000f0000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e34c5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e34c5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e34c6000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000e34c6080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e34c6100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
page: refcount:18 mapcount:1 mapping:000000000289cd7d index:0x8 pfn:0x12b280
head: order:3 mapcount:8 entire_mapcount:0 nr_pages_mapped:8 pincount:0
memcg:ffff0000c19c0c80
aops:ext4_da_aops ino:f dentry name(?):"file1"
flags: 0x5ffc00000005079(locked|uptodate|dirty|lru|arch_1|private|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000005079 fffffdffc3b7f648 fffffdffc3aae508 ffff0000e38c8e48
raw: 0000000000000008 ffff0000eda65910 0000001200000000 ffff0000c19c0c80
head: 05ffc00000005079 fffffdffc3b7f648 fffffdffc3aae508 ffff0000e38c8e48
head: 0000000000000008 ffff0000eda65910 0000001200000000 ffff0000c19c0c80
head: 05ffc00000000203 fffffdffc3aca001 0000000800000007 00000000ffffffff
head: ffffffff00000007 000000000000001e 0000000000000000 0000000000000008
page dumped because: VM_WARN_ON_FOLIO((_Generic((page), const struct page *: (const struct folio *)_compound_head(page), struct page *: (struct folio *)_compound_head(page))) != folio)
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7608 at ./include/linux/rmap.h:426 __folio_rmap_sanity_checks+0x2c0/0x430 include/linux/rmap.h:426
Modules linked in:
CPU: 0 UID: 0 PID: 7608 Comm: syz.0.190 Tainted: G    B               6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __folio_rmap_sanity_checks+0x2c0/0x430 include/linux/rmap.h:426
lr : __folio_rmap_sanity_checks+0x2c0/0x430 include/linux/rmap.h:426
sp : ffff8000a3d272c0
x29: ffff8000a3d272c0 x28: 00000000000001f0 x27: 0000000020010000
x26: 002400012b288bc3 x25: dfff800000000000 x24: 000000000020ac5d
x23: fffffdffc3ae1808 x22: fffffdffc3aca200 x21: 0000000000000000
x20: 00000000000001f0 x19: fffffdffc3aca000 x18: 1fffe0003379be88
x17: 3030303030303020 x16: ffff80008b007230 x15: 0000000000000001
x14: 1ffff000147a4d84 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000ff0100 x9 : 7169884741f77900
x8 : 7169884741f77900 x7 : 0000000000000001 x6 : ffff800080563af4
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807de560
x2 : 0000000000000002 x1 : 0000000100000001 x0 : 00000000000000b8
Call trace:
 __folio_rmap_sanity_checks+0x2c0/0x430 include/linux/rmap.h:426 (P)
 __folio_add_rmap mm/rmap.c:1252 [inline]
 __folio_add_file_rmap mm/rmap.c:1620 [inline]
 folio_add_file_rmap_ptes+0x84/0x8e8 mm/rmap.c:1642
 set_pte_range+0x2e4/0x49c mm/memory.c:5311
 filemap_map_folio_range mm/filemap.c:3673 [inline]
 filemap_map_pages+0xb54/0x155c mm/filemap.c:3783
 do_fault_around mm/memory.c:5531 [inline]
 do_read_fault mm/memory.c:5564 [inline]
 do_fault mm/memory.c:5707 [inline]
 do_pte_missing mm/memory.c:4234 [inline]
 handle_pte_fault mm/memory.c:6052 [inline]
 __handle_mm_fault mm/memory.c:6195 [inline]
 handle_mm_fault+0x2b64/0x4d34 mm/memory.c:6364
 faultin_page mm/gup.c:1144 [inline]
 __get_user_pages+0x1f40/0x2da0 mm/gup.c:1446
 populate_vma_page_range+0x258/0x348 mm/gup.c:1880
 __mm_populate+0x208/0x330 mm/gup.c:1983
 mm_populate include/linux/mm.h:3367 [inline]
 vm_mmap_pgoff+0x398/0x45c mm/util.c:585
 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:604
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 7233
hardirqs last  enabled at (7233): [<ffff80008b00487c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline]
hardirqs last  enabled at (7233): [<ffff80008b00487c>] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96
hardirqs last disabled at (7232): [<ffff80008b001cbc>] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline]
hardirqs last disabled at (7232): [<ffff80008b001cbc>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668
softirqs last  enabled at (5898): [<ffff8000803d88a0>] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last  enabled at (5898): [<ffff8000803d88a0>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607
softirqs last disabled at (5721): [<ffff800080022028>] __do_softirq+0x14/0x20 kernel/softirq.c:613
---[ end trace 0000000000000000 ]---
page: refcount:18 mapcount:1 mapping:000000000289cd7d index:0x8 pfn:0x12b280
head: order:3 mapcount:8 entire_mapcount:0 nr_pages_mapped:8 pincount:0
memcg:ffff0000c19c0c80
aops:ext4_da_aops ino:f dentry name(?):"file1"
flags: 0x5ffc00000005079(locked|uptodate|dirty|lru|arch_1|private|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000005079 fffffdffc3b7f648 fffffdffc3aae508 ffff0000e38c8e48
raw: 0000000000000008 ffff0000eda65910 0000001200000000 ffff0000c19c0c80
head: 05ffc00000005079 fffffdffc3b7f648 fffffdffc3aae508 ffff0000e38c8e48
head: 0000000000000008 ffff0000eda65910 0000001200000000 ffff0000c19c0c80
head: 05ffc00000000203 fffffdffc3aca001 0000000800000007 00000000ffffffff
head: ffffffff00000007 000000000000001e 0000000000000000 0000000000000008
page dumped because: VM_WARN_ON_FOLIO((_Generic((page + nr_pages - 1), const struct page *: (const struct folio *)_compound_head(page + nr_pages - 1), struct page *: (struct folio *)_compound_head(page + nr_pages - 1))) != folio)
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7608 at ./include/linux/rmap.h:427 __folio_rmap_sanity_checks+0x2ec/0x430 include/linux/rmap.h:427
Modules linked in:
CPU: 0 UID: 0 PID: 7608 Comm: syz.0.190 Tainted: G    B   W           6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Tainted: [B]=BAD_PAGE, [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __folio_rmap_sanity_checks+0x2ec/0x430 include/linux/rmap.h:427
lr : __folio_rmap_sanity_checks+0x2ec/0x430 include/linux/rmap.h:427
sp : ffff8000a3d272c0
x29: ffff8000a3d272c0 x28: 00000000000001f0 x27: 0000000020010000
x26: 002400012b288bc3 x25: dfff800000000000 x24: 000000000020ac5d
x23: fffffdffc3ad1e00 x22: dead000000000100 x21: 0000000000000000
x20: 00000000000001f0 x19: fffffdffc3aca000 x18: 1fffe0003379be88
x17: 3030303030303020 x16: ffff80008b007230 x15: 0000000000000001
x14: 1ffff000147a4d84 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000ff0100 x9 : 7169884741f77900
x8 : 7169884741f77900 x7 : 0000000000000001 x6 : ffff800080563af4
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807de560
x2 : 0000000000000002 x1 : 0000000000000001 x0 : 00000000000000e5
Call trace:
 __folio_rmap_sanity_checks+0x2ec/0x430 include/linux/rmap.h:427 (P)
 __folio_add_rmap mm/rmap.c:1252 [inline]
 __folio_add_file_rmap mm/rmap.c:1620 [inline]
 folio_add_file_rmap_ptes+0x84/0x8e8 mm/rmap.c:1642
 set_pte_range+0x2e4/0x49c mm/memory.c:5311
 filemap_map_folio_range mm/filemap.c:3673 [inline]
 filemap_map_pages+0xb54/0x155c mm/filemap.c:3783
 do_fault_around mm/memory.c:5531 [inline]
 do_read_fault mm/memory.c:5564 [inline]
 do_fault mm/memory.c:5707 [inline]
 do_pte_missing mm/memory.c:4234 [inline]
 handle_pte_fault mm/memory.c:6052 [inline]
 __handle_mm_fault mm/memory.c:6195 [inline]
 handle_mm_fault+0x2b64/0x4d34 mm/memory.c:6364
 faultin_page mm/gup.c:1144 [inline]
 __get_user_pages+0x1f40/0x2da0 mm/gup.c:1446
 populate_vma_page_range+0x258/0x348 mm/gup.c:1880
 __mm_populate+0x208/0x330 mm/gup.c:1983
 mm_populate include/linux/mm.h:3367 [inline]
 vm_mmap_pgoff+0x398/0x45c mm/util.c:585
 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:604
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 7233
hardirqs last  enabled at (7233): [<ffff80008b00487c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline]
hardirqs last  enabled at (7233): [<ffff80008b00487c>] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96
hardirqs last disabled at (7232): [<ffff80008b001cbc>] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline]
hardirqs last disabled at (7232): [<ffff80008b001cbc>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668
softirqs last  enabled at (5898): [<ffff8000803d88a0>] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last  enabled at (5898): [<ffff8000803d88a0>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607
softirqs last disabled at (5721): [<ffff800080022028>] __do_softirq+0x14/0x20 kernel/softirq.c:613
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7608 at ./include/linux/rmap.h:214 __folio_large_mapcount_sanity_checks+0x3d4/0x5dc include/linux/rmap.h:214
Modules linked in:
CPU: 0 UID: 0 PID: 7608 Comm: syz.0.190 Tainted: G    B   W           6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Tainted: [B]=BAD_PAGE, [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __folio_large_mapcount_sanity_checks+0x3d4/0x5dc include/linux/rmap.h:214
lr : __folio_large_mapcount_sanity_checks+0x3d4/0x5dc include/linux/rmap.h:214
sp : ffff8000a3d272b0
x29: ffff8000a3d272b0 x28: 00000000000001f0 x27: 1fffffbff875940f
x26: 1fffffbff8759400 x25: 1fffffbff8759401 x24: dfff800000000000
x23: 00000000000001f0 x22: fffffdffc3aca078 x21: 0000000000000008
x20: fffffdffc3aca008 x19: fffffdffc3aca000 x18: 1fffe0003379be88
x17: 3030303030303020 x16: ffff80008b007230 x15: 0000000000000001
x14: 1fffffbff875940d x13: 0000000000000000 x12: 0000000000000000
x11: ffff7fbff875940e x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000cedf1e80 x7 : 0000000000000001 x6 : ffff800080563af4
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080b65b10
x2 : 000000000000001e x1 : 00000000000001f0 x0 : 0000000000000008
Call trace:
 __folio_large_mapcount_sanity_checks+0x3d4/0x5dc include/linux/rmap.h:214 (P)
 folio_add_return_large_mapcount include/linux/rmap.h:250 [inline]
 __folio_add_rmap mm/rmap.c:1279 [inline]
 __folio_add_file_rmap mm/rmap.c:1620 [inline]
 folio_add_file_rmap_ptes+0x344/0x8e8 mm/rmap.c:1642
 set_pte_range+0x2e4/0x49c mm/memory.c:5311
 filemap_map_folio_range mm/filemap.c:3673 [inline]
 filemap_map_pages+0xb54/0x155c mm/filemap.c:3783
 do_fault_around mm/memory.c:5531 [inline]
 do_read_fault mm/memory.c:5564 [inline]
 do_fault mm/memory.c:5707 [inline]
 do_pte_missing mm/memory.c:4234 [inline]
 handle_pte_fault mm/memory.c:6052 [inline]
 __handle_mm_fault mm/memory.c:6195 [inline]
 handle_mm_fault+0x2b64/0x4d34 mm/memory.c:6364
 faultin_page mm/gup.c:1144 [inline]
 __get_user_pages+0x1f40/0x2da0 mm/gup.c:1446
 populate_vma_page_range+0x258/0x348 mm/gup.c:1880
 __mm_populate+0x208/0x330 mm/gup.c:1983
 mm_populate include/linux/mm.h:3367 [inline]
 vm_mmap_pgoff+0x398/0x45c mm/util.c:585
 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:604
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 7233
hardirqs last  enabled at (7233): [<ffff80008b00487c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline]
hardirqs last  enabled at (7233): [<ffff80008b00487c>] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96
hardirqs last disabled at (7232): [<ffff80008b001cbc>] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline]
hardirqs last disabled at (7232): [<ffff80008b001cbc>] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668
softirqs last  enabled at (5898): [<ffff8000803d88a0>] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last  enabled at (5898): [<ffff8000803d88a0>] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607
softirqs last disabled at (5721): [<ffff800080022028>] __do_softirq+0x14/0x20 kernel/softirq.c:613
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
kernel BUG at mm/page_table_check.c:120!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 7608 Comm: syz.0.190 Tainted: G    B   W           6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT 
Tainted: [B]=BAD_PAGE, [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : page_table_check_set+0x56c/0x590 mm/page_table_check.c:120
lr : page_table_check_set+0x56c/0x590 mm/page_table_check.c:120
sp : ffff8000a3d271c0
x29: ffff8000a3d271d0 x28: ffff80008fae0000 x27: 0000000000000001
x26: ffff0000c0799900 x25: 0000000000000009 x24: 0000000000000001
x23: ffff0000c0799900 x22: 000000000012b318 x21: 0000000000000000
x20: 0000000000000010 x19: 1ffff00012eb65b0 x18: 1fffe0003379be88
x17: 3030303030303020 x16: ffff80008b0062e4 x15: 0000000000000001
x14: 1fffe000180f3320 x13: 0000000000000000 x12: 0000000000000000
x11: ffff6000180f3321 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000cedf1e80 x7 : 0000000000000001 x6 : ffff800080d16554
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080d15a98
x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 page_table_check_set+0x56c/0x590 mm/page_table_check.c:120 (P)
 __page_table_check_ptes_set+0x2a8/0x2e0 mm/page_table_check.c:209
 page_table_check_ptes_set include/linux/page_table_check.h:76 [inline]
 __set_ptes_anysz arch/arm64/include/asm/pgtable.h:709 [inline]
 __set_ptes+0x4a0/0x504 arch/arm64/include/asm/pgtable.h:741
 contpte_set_ptes+0x120/0x188 arch/arm64/mm/contpte.c:464
 set_ptes arch/arm64/include/asm/pgtable.h:1794 [inline]
 set_pte_range+0x3ec/0x49c mm/memory.c:5313
 filemap_map_folio_range mm/filemap.c:3673 [inline]
 filemap_map_pages+0xb54/0x155c mm/filemap.c:3783
 do_fault_around mm/memory.c:5531 [inline]
 do_read_fault mm/memory.c:5564 [inline]
 do_fault mm/memory.c:5707 [inline]
 do_pte_missing mm/memory.c:4234 [inline]
 handle_pte_fault mm/memory.c:6052 [inline]
 __handle_mm_fault mm/memory.c:6195 [inline]
 handle_mm_fault+0x2b64/0x4d34 mm/memory.c:6364
 faultin_page mm/gup.c:1144 [inline]
 __get_user_pages+0x1f40/0x2da0 mm/gup.c:1446
 populate_vma_page_range+0x258/0x348 mm/gup.c:1880
 __mm_populate+0x208/0x330 mm/gup.c:1983
 mm_populate include/linux/mm.h:3367 [inline]
 vm_mmap_pgoff+0x398/0x45c mm/util.c:585
 ksys_mmap_pgoff+0x394/0x5b8 mm/mmap.c:604
 __do_sys_mmap arch/arm64/kernel/sys.c:28 [inline]
 __se_sys_mmap arch/arm64/kernel/sys.c:21 [inline]
 __arm64_sys_mmap+0xf8/0x110 arch/arm64/kernel/sys.c:21
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: aa1603e0 97fd6069 17fffee6 97e86601 (d4210000) 
---[ end trace 0000000000000000 ]---

Crashes (17):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/01 13:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 807a3b61 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-gce-arm64 KASAN: use-after-free Read in filemap_map_pages
2025/08/20 07:58 upstream b19a97d57c15 79512909 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci-upstream-kasan-gce-root KASAN: use-after-free Read in filemap_map_pages
2025/10/01 07:20 upstream 50c19e20ed2e 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root KASAN: slab-use-after-free Read in filemap_map_pages
2025/08/29 23:33 upstream fb679c832b64 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-use-after-free Read in filemap_map_pages
2025/05/29 09:08 upstream 90b83efa6701 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root KASAN: slab-use-after-free Read in filemap_map_pages
2025/04/15 05:16 upstream 834a4a689699 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-use-after-free Read in filemap_map_pages
2025/02/03 17:41 upstream 2014c95afece a21a8419 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: slab-use-after-free Read in filemap_map_pages
2024/12/28 10:49 linux-next 8155b4ef3466 d3ccff63 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root KASAN: slab-use-after-free Read in filemap_map_pages
2024/12/28 08:59 linux-next 8155b4ef3466 d3ccff63 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root KASAN: slab-use-after-free Read in filemap_map_pages
2024/12/28 08:03 linux-next 8155b4ef3466 d3ccff63 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root KASAN: slab-use-after-free Read in filemap_map_pages
2024/12/28 07:04 linux-next 8155b4ef3466 d3ccff63 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-linux-next-kasan-gce-root KASAN: slab-use-after-free Read in filemap_map_pages
2024/12/28 03:56 linux-next 8155b4ef3466 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: slab-use-after-free Read in filemap_map_pages
2025/09/01 12:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-use-after-free Read in filemap_map_pages
2025/07/21 08:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci aaef6f251176 7117feec .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: slab-use-after-free Read in filemap_map_pages
2025/10/01 07:06 upstream 50c19e20ed2e 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-root KMSAN: uninit-value in filemap_map_pages
2025/08/23 07:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in filemap_map_pages
2025/08/18 10:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in filemap_map_pages
* Struck through repros no longer work on HEAD.