==================================================================
BUG: KASAN: slab-out-of-bounds in __cpa_addr arch/x86/mm/pat/set_memory.c:309 [inline]
BUG: KASAN: slab-out-of-bounds in __cpa_addr+0x1d3/0x220 arch/x86/mm/pat/set_memory.c:306
Read of size 8 at addr ffff888032890888 by task syz.1.729/9054

CPU: 0 UID: 0 PID: 9054 Comm: syz.1.729 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 __cpa_addr arch/x86/mm/pat/set_memory.c:309 [inline]
 __cpa_addr+0x1d3/0x220 arch/x86/mm/pat/set_memory.c:306
 cpa_flush+0x28b/0x8a0 arch/x86/mm/pat/set_memory.c:449
 change_page_attr_set_clr+0x34e/0x4a0 arch/x86/mm/pat/set_memory.c:2115
 cpa_set_pages_array arch/x86/mm/pat/set_memory.c:2137 [inline]
 _set_pages_array+0x1ab/0x2c0 arch/x86/mm/pat/set_memory.c:2521
 drm_gem_shmem_get_pages_locked+0x384/0x490 drivers/gpu/drm/drm_gem_shmem_helper.c:214
 drm_gem_shmem_mmap drivers/gpu/drm/drm_gem_shmem_helper.c:646 [inline]
 drm_gem_shmem_mmap+0xc9/0x550 drivers/gpu/drm/drm_gem_shmem_helper.c:620
 drm_gem_mmap_obj+0x1b5/0x560 drivers/gpu/drm/drm_gem.c:1167
 drm_gem_mmap+0x40b/0x620 drivers/gpu/drm/drm_gem.c:1245
 vfs_mmap include/linux/fs.h:2405 [inline]
 mmap_file mm/internal.h:167 [inline]
 __mmap_new_file_vma mm/vma.c:2413 [inline]
 __mmap_new_vma mm/vma.c:2476 [inline]
 __mmap_region+0x1309/0x27a0 mm/vma.c:2670
 mmap_region+0x32b/0x3f0 mm/vma.c:2740
 do_mmap+0xa3e/0x1210 mm/mmap.c:558
 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
 ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:604
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9db18eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd9d8f91038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fd9db3e6270 RCX: 00007fd9db18eec9
RDX: 0000000000000004 RSI: 0000000000004000 RDI: 0000200000001000
RBP: 00007fd9db211f91 R08: 0000000000000007 R09: 0000000100000000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd9db3e6308 R14: 00007fd9db3e6270 R15: 00007ffc76af2068
 </TASK>

Allocated by task 9054:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
 kasan_save_track+0x14/0x30 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:400 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417
 kasan_kmalloc include/linux/kasan.h:262 [inline]
 __do_kmalloc_node mm/slub.c:5627 [inline]
 __kvmalloc_node_noprof+0x3a3/0x9c0 mm/slub.c:7081
 kvmalloc_array_node_noprof include/linux/slab.h:1122 [inline]
 drm_gem_get_pages+0x144/0xa10 drivers/gpu/drm/drm_gem.c:647
 drm_gem_shmem_get_pages_locked+0x1e6/0x490 drivers/gpu/drm/drm_gem_shmem_helper.c:200
 drm_gem_shmem_mmap drivers/gpu/drm/drm_gem_shmem_helper.c:646 [inline]
 drm_gem_shmem_mmap+0xc9/0x550 drivers/gpu/drm/drm_gem_shmem_helper.c:620
 drm_gem_mmap_obj+0x1b5/0x560 drivers/gpu/drm/drm_gem.c:1167
 drm_gem_mmap+0x40b/0x620 drivers/gpu/drm/drm_gem.c:1245
 vfs_mmap include/linux/fs.h:2405 [inline]
 mmap_file mm/internal.h:167 [inline]
 __mmap_new_file_vma mm/vma.c:2413 [inline]
 __mmap_new_vma mm/vma.c:2476 [inline]
 __mmap_region+0x1309/0x27a0 mm/vma.c:2670
 mmap_region+0x32b/0x3f0 mm/vma.c:2740
 do_mmap+0xa3e/0x1210 mm/mmap.c:558
 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
 ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:604
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888032890800
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 0 bytes to the right of
 allocated 136-byte region [ffff888032890800, ffff888032890888)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32890
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88813ffa63c0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 9043, tgid 9042 (syz.4.732), ts 326838706017, free_ts 326215894580
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 alloc_slab_page mm/slub.c:3041 [inline]
 allocate_slab mm/slub.c:3212 [inline]
 new_slab+0xa5/0x360 mm/slub.c:3266
 ___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
 __slab_alloc_node mm/slub.c:4831 [inline]
 slab_alloc_node mm/slub.c:5253 [inline]
 __do_kmalloc_node mm/slub.c:5626 [inline]
 __kmalloc_node_noprof+0x4dd/0x8a0 mm/slub.c:5633
 kmalloc_array_node_noprof include/linux/slab.h:1075 [inline]
 alloc_slab_obj_exts+0x3a/0xd0 mm/slub.c:2123
 __memcg_slab_post_alloc_hook+0x251/0x940 mm/memcontrol.c:3173
 memcg_slab_post_alloc_hook mm/slub.c:2322 [inline]
 slab_post_alloc_hook mm/slub.c:4966 [inline]
 slab_alloc_node mm/slub.c:5265 [inline]
 kmem_cache_alloc_noprof+0x550/0x6e0 mm/slub.c:5272
 alloc_buffer_head+0x21/0x160 fs/buffer.c:3025
 folio_alloc_buffers+0x2b5/0x6c0 fs/buffer.c:935
 create_empty_buffers+0x36/0x480 fs/buffer.c:1691
 __nilfs_get_folio_block fs/nilfs2/page.c:37 [inline]
 nilfs_grab_buffer+0x2e3/0x410 fs/nilfs2/page.c:60
 nilfs_mdt_submit_block+0x9f/0x870 fs/nilfs2/mdt.c:123
 nilfs_mdt_read_block+0xa4/0x3c0 fs/nilfs2/mdt.c:178
page last free pid 9038 tgid 9038 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 tlb_batch_list_free mm/mmu_gather.c:159 [inline]
 tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
 exit_mmap+0x3fc/0xb90 mm/mmap.c:1293
 __mmput+0x12a/0x410 kernel/fork.c:1133
 mmput+0x62/0x70 kernel/fork.c:1156
 exit_mm kernel/exit.c:582 [inline]
 do_exit+0x7c7/0x2bf0 kernel/exit.c:954
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
 __do_sys_exit_group kernel/exit.c:1118 [inline]
 __se_sys_exit_group kernel/exit.c:1116 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116
 x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888032890780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888032890800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888032890880: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff888032890900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888032890980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================
==================================================================
BUG: KASAN: slab-out-of-bounds in __cpa_addr arch/x86/mm/pat/set_memory.c:309 [inline]
BUG: KASAN: slab-out-of-bounds in __cpa_addr+0x1d3/0x220 arch/x86/mm/pat/set_memory.c:306
Read of size 8 at addr ffff888032890888 by task syz.1.729/9054

CPU: 1 UID: 0 PID: 9054 Comm: syz.1.729 Tainted: G    B               syzkaller #0 PREEMPT(full) 
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 __cpa_addr arch/x86/mm/pat/set_memory.c:309 [inline]
 __cpa_addr+0x1d3/0x220 arch/x86/mm/pat/set_memory.c:306
 cpa_flush+0x28b/0x8a0 arch/x86/mm/pat/set_memory.c:449
 change_page_attr_set_clr+0x34e/0x4a0 arch/x86/mm/pat/set_memory.c:2115
 _set_pages_array+0x20a/0x2c0 arch/x86/mm/pat/set_memory.c:2524
 drm_gem_shmem_get_pages_locked+0x384/0x490 drivers/gpu/drm/drm_gem_shmem_helper.c:214
 drm_gem_shmem_mmap drivers/gpu/drm/drm_gem_shmem_helper.c:646 [inline]
 drm_gem_shmem_mmap+0xc9/0x550 drivers/gpu/drm/drm_gem_shmem_helper.c:620
 drm_gem_mmap_obj+0x1b5/0x560 drivers/gpu/drm/drm_gem.c:1167
 drm_gem_mmap+0x40b/0x620 drivers/gpu/drm/drm_gem.c:1245
 vfs_mmap include/linux/fs.h:2405 [inline]
 mmap_file mm/internal.h:167 [inline]
 __mmap_new_file_vma mm/vma.c:2413 [inline]
 __mmap_new_vma mm/vma.c:2476 [inline]
 __mmap_region+0x1309/0x27a0 mm/vma.c:2670
 mmap_region+0x32b/0x3f0 mm/vma.c:2740
 do_mmap+0xa3e/0x1210 mm/mmap.c:558
 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
 ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:604
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9db18eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd9d8f91038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fd9db3e6270 RCX: 00007fd9db18eec9
RDX: 0000000000000004 RSI: 0000000000004000 RDI: 0000200000001000
RBP: 00007fd9db211f91 R08: 0000000000000007 R09: 0000000100000000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd9db3e6308 R14: 00007fd9db3e6270 R15: 00007ffc76af2068
 </TASK>

Allocated by task 9054:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
 kasan_save_track+0x14/0x30 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:400 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:417
 kasan_kmalloc include/linux/kasan.h:262 [inline]
 __do_kmalloc_node mm/slub.c:5627 [inline]
 __kvmalloc_node_noprof+0x3a3/0x9c0 mm/slub.c:7081
 kvmalloc_array_node_noprof include/linux/slab.h:1122 [inline]
 drm_gem_get_pages+0x144/0xa10 drivers/gpu/drm/drm_gem.c:647
 drm_gem_shmem_get_pages_locked+0x1e6/0x490 drivers/gpu/drm/drm_gem_shmem_helper.c:200
 drm_gem_shmem_mmap drivers/gpu/drm/drm_gem_shmem_helper.c:646 [inline]
 drm_gem_shmem_mmap+0xc9/0x550 drivers/gpu/drm/drm_gem_shmem_helper.c:620
 drm_gem_mmap_obj+0x1b5/0x560 drivers/gpu/drm/drm_gem.c:1167
 drm_gem_mmap+0x40b/0x620 drivers/gpu/drm/drm_gem.c:1245
 vfs_mmap include/linux/fs.h:2405 [inline]
 mmap_file mm/internal.h:167 [inline]
 __mmap_new_file_vma mm/vma.c:2413 [inline]
 __mmap_new_vma mm/vma.c:2476 [inline]
 __mmap_region+0x1309/0x27a0 mm/vma.c:2670
 mmap_region+0x32b/0x3f0 mm/vma.c:2740
 do_mmap+0xa3e/0x1210 mm/mmap.c:558
 vm_mmap_pgoff+0x29e/0x470 mm/util.c:581
 ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:604
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888032890800
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 0 bytes to the right of
 allocated 136-byte region [ffff888032890800, ffff888032890888)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32890
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88813ffa63c0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 9043, tgid 9042 (syz.4.732), ts 326838706017, free_ts 326215894580
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x10a3/0x3a30 mm/page_alloc.c:3884
 __alloc_frozen_pages_noprof+0x25f/0x2470 mm/page_alloc.c:5183
 alloc_slab_page mm/slub.c:3041 [inline]
 allocate_slab mm/slub.c:3212 [inline]
 new_slab+0xa5/0x360 mm/slub.c:3266
 ___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4636
 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4755
 __slab_alloc_node mm/slub.c:4831 [inline]
 slab_alloc_node mm/slub.c:5253 [inline]
 __do_kmalloc_node mm/slub.c:5626 [inline]
 __kmalloc_node_noprof+0x4dd/0x8a0 mm/slub.c:5633
 kmalloc_array_node_noprof include/linux/slab.h:1075 [inline]
 alloc_slab_obj_exts+0x3a/0xd0 mm/slub.c:2123
 __memcg_slab_post_alloc_hook+0x251/0x940 mm/memcontrol.c:3173
 memcg_slab_post_alloc_hook mm/slub.c:2322 [inline]
 slab_post_alloc_hook mm/slub.c:4966 [inline]
 slab_alloc_node mm/slub.c:5265 [inline]
 kmem_cache_alloc_noprof+0x550/0x6e0 mm/slub.c:5272
 alloc_buffer_head+0x21/0x160 fs/buffer.c:3025
 folio_alloc_buffers+0x2b5/0x6c0 fs/buffer.c:935
 create_empty_buffers+0x36/0x480 fs/buffer.c:1691
 __nilfs_get_folio_block fs/nilfs2/page.c:37 [inline]
 nilfs_grab_buffer+0x2e3/0x410 fs/nilfs2/page.c:60
 nilfs_mdt_submit_block+0x9f/0x870 fs/nilfs2/mdt.c:123
 nilfs_mdt_read_block+0xa4/0x3c0 fs/nilfs2/mdt.c:178
page last free pid 9038 tgid 9038 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0x7df/0x1160 mm/page_alloc.c:2906
 tlb_batch_list_free mm/mmu_gather.c:159 [inline]
 tlb_finish_mmu+0x237/0x7c0 mm/mmu_gather.c:500
 exit_mmap+0x3fc/0xb90 mm/mmap.c:1293
 __mmput+0x12a/0x410 kernel/fork.c:1133
 mmput+0x62/0x70 kernel/fork.c:1156
 exit_mm kernel/exit.c:582 [inline]
 do_exit+0x7c7/0x2bf0 kernel/exit.c:954
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1107
 __do_sys_exit_group kernel/exit.c:1118 [inline]
 __se_sys_exit_group kernel/exit.c:1116 [inline]
 __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1116
 x64_sys_call+0x150b/0x1730 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888032890780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888032890800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888032890880: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff888032890900: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888032890980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
==================================================================