================================================================== 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 ffff88807252c888 by task syz.0.17/6007 CPU: 1 UID: 0 PID: 6007 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 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+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:2404 [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+0x1306/0x27a0 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:580 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/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdbfd38eec9 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:00007fff17fc13d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007fdbfd5e5fa0 RCX: 00007fdbfd38eec9 RDX: 0000000000000004 RSI: 0000000000004000 RDI: 0000200000001000 RBP: 00007fdbfd411f91 R08: 0000000000000003 R09: 0000000100000000 R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdbfd5e5fa0 R14: 00007fdbfd5e5fa0 R15: 0000000000000006 Allocated by task 6007: 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:5603 [inline] __kvmalloc_node_noprof+0x3a3/0x9c0 mm/slub.c:7036 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:2404 [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+0x1306/0x27a0 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:580 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/0x4e0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807252c800 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 [ffff88807252c800, ffff88807252c888) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7252c flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801b0263c0 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 5934, tgid 5934 (syz-executor), ts 75996274955, free_ts 75996254683 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:3032 [inline] allocate_slab mm/slub.c:3203 [inline] new_slab+0xa5/0x360 mm/slub.c:3257 ___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4627 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4746 __slab_alloc_node mm/slub.c:4822 [inline] slab_alloc_node mm/slub.c:5233 [inline] __do_kmalloc_node mm/slub.c:5602 [inline] __kmalloc_node_noprof+0x4dd/0x8a0 mm/slub.c:5609 kmalloc_array_node_noprof include/linux/slab.h:1075 [inline] alloc_slab_obj_exts+0x3a/0xd0 mm/slub.c:2115 account_slab mm/slub.c:3157 [inline] allocate_slab mm/slub.c:3222 [inline] new_slab+0x283/0x360 mm/slub.c:3257 ___slab_alloc+0xdc4/0x1ae0 mm/slub.c:4627 __slab_alloc.constprop.0+0x63/0x110 mm/slub.c:4746 __slab_alloc_node mm/slub.c:4822 [inline] slab_alloc_node mm/slub.c:5233 [inline] kmem_cache_alloc_lru_noprof+0x443/0x6e0 mm/slub.c:5264 __d_alloc+0x32/0xae0 fs/dcache.c:1690 d_alloc_parallel+0x111/0x1480 fs/dcache.c:2549 __lookup_slow+0x193/0x460 fs/namei.c:1801 lookup_noperm+0xe1/0x110 fs/namei.c:3001 page last free pid 5934 tgid 5934 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 selinux_genfs_get_sid security/selinux/hooks.c:1357 [inline] inode_doinit_with_dentry+0xacb/0x12e0 security/selinux/hooks.c:1555 selinux_d_instantiate+0x26/0x30 security/selinux/hooks.c:6523 security_d_instantiate+0x142/0x1a0 security/security.c:4148 d_instantiate+0x5c/0x90 fs/dcache.c:1961 __debugfs_create_file+0x286/0x6b0 fs/debugfs/inode.c:459 debugfs_create_file_short+0x41/0x60 fs/debugfs/inode.c:480 add_common_files net/mac80211/debugfs_netdev.c:832 [inline] add_files net/mac80211/debugfs_netdev.c:945 [inline] ieee80211_debugfs_add_netdev net/mac80211/debugfs_netdev.c:1009 [inline] ieee80211_debugfs_recreate_netdev+0x631/0x17e0 net/mac80211/debugfs_netdev.c:1033 ieee80211_if_change_type+0x2ba/0x800 net/mac80211/iface.c:2008 ieee80211_change_iface+0xa5/0x500 net/mac80211/cfg.c:254 rdev_change_virtual_intf net/wireless/rdev-ops.h:74 [inline] cfg80211_change_iface+0x582/0xdc0 net/wireless/util.c:1238 nl80211_set_interface+0x911/0xcb0 net/wireless/nl80211.c:4633 genl_family_rcv_msg_doit+0x206/0x2f0 net/netlink/genetlink.c:1115 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0x55c/0x800 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x155/0x420 net/netlink/af_netlink.c:2552 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 Memory state around the buggy address: ffff88807252c780: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ffff88807252c800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88807252c880: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88807252c900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88807252c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ==================================================================