================================================================== 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 ffff888032b00f88 by task syz.3.1574/9969 CPU: 1 UID: 0 PID: 9969 Comm: syz.3.1574 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __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+0xec/0x8a0 arch/x86/mm/pat/set_memory.c:449 change_page_attr_set_clr arch/x86/mm/pat/set_memory.c:2115 [inline] cpa_clear_pages_array arch/x86/mm/pat/set_memory.c:2144 [inline] set_pages_array_wb+0x238/0x280 arch/x86/mm/pat/set_memory.c:2572 drm_gem_shmem_put_pages_locked+0x27e/0x300 drivers/gpu/drm/drm_gem_shmem_helper.c:239 drm_gem_shmem_vm_close+0x63/0xc0 drivers/gpu/drm/drm_gem_shmem_helper.c:596 vma_close mm/internal.h:190 [inline] remove_vma+0x88/0x160 mm/vma.c:464 exit_mmap+0x50a/0xb90 mm/mmap.c:1305 __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 RIP: 0033:0x7ff290f8eec9 Code: Unable to access opcode bytes at 0x7ff290f8ee9f. RSP: 002b:00007ffedd59de48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff290f8eec9 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffedd59deac R08: 00000004dd59df3f R09: 00000000000927c0 R10: 0000000000000001 R11: 0000000000000246 R12: 00000000000001d8 R13: 00000000000927c0 R14: 0000000000028e54 R15: 00007ffedd59df00 Allocated by task 9970: 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 ffff888032b00f00 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 [ffff888032b00f00, ffff888032b00f88) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32b00 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801b4423c0 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 9903, tgid 9902 (syz.3.1543), ts 165888810581, free_ts 162394851736 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 folio_create_buffers+0x109/0x150 fs/buffer.c:1802 __block_write_begin_int+0x320/0x16d0 fs/buffer.c:2126 iomap_write_begin+0x756/0x1890 fs/iomap/buffered-io.c:860 page last free pid 53 tgid 53 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 __folio_put+0x329/0x450 mm/swap.c:112 folio_put_refs include/linux/mm.h:1445 [inline] gup_put_folio+0x194/0x220 mm/gup.c:114 unpin_user_pages_dirty_lock+0xcb/0x220 mm/gup.c:324 xdp_umem_unpin_pages net/xdp/xdp_umem.c:26 [inline] xdp_umem_release+0x11a/0x2b0 net/xdp/xdp_umem.c:61 xdp_put_umem+0x1b3/0x200 net/xdp/xdp_umem.c:89 xp_release_deferred+0x11e/0x1f0 net/xdp/xsk_buff_pool.c:302 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263 process_scheduled_works kernel/workqueue.c:3346 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888032b00e80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888032b00f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888032b00f80: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888032b01000: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc ffff888032b01080: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc ==================================================================