================================================================== BUG: KASAN: slab-out-of-bounds in cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline] BUG: KASAN: slab-out-of-bounds in cleancache_invalidate_page include/linux/cleancache.h:110 [inline] BUG: KASAN: slab-out-of-bounds in unaccount_page_cache_page+0x6f2/0x760 mm/filemap.c:167 Read of size 4 at addr ffff88812129b470 by task syz.8.1935/6922 CPU: 1 PID: 6922 Comm: syz.8.1935 Tainted: G W 5.15.185-syzkaller-00339-ge678c93d43cc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x21/0x30 lib/dump_stack.c:88 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0xf1/0x140 mm/kasan/report.c:444 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 cleancache_fs_enabled_mapping include/linux/cleancache.h:56 [inline] cleancache_invalidate_page include/linux/cleancache.h:110 [inline] unaccount_page_cache_page+0x6f2/0x760 mm/filemap.c:167 __delete_from_page_cache+0xbe/0x420 mm/filemap.c:235 __remove_mapping+0x55d/0x680 mm/vmscan.c:1208 shrink_page_list+0x25c8/0x4cc0 mm/vmscan.c:1805 shrink_inactive_list mm/vmscan.c:2312 [inline] shrink_list mm/vmscan.c:2557 [inline] shrink_lruvec+0x10e4/0x3760 mm/vmscan.c:5762 shrink_node_memcgs mm/vmscan.c:5954 [inline] shrink_node+0x11e9/0x2a70 mm/vmscan.c:5984 shrink_zones mm/vmscan.c:6190 [inline] do_try_to_free_pages+0x57e/0x1550 mm/vmscan.c:6248 try_to_free_mem_cgroup_pages+0x233/0x5b0 mm/vmscan.c:6562 try_charge_memcg+0x3da/0x1450 mm/memcontrol.c:2702 try_charge mm/memcontrol.c:2827 [inline] charge_memcg+0x6d/0x1a0 mm/memcontrol.c:6853 __mem_cgroup_charge+0x37/0x130 mm/memcontrol.c:6889 mem_cgroup_charge include/linux/memcontrol.h:715 [inline] shmem_add_to_page_cache+0x62f/0xc30 mm/shmem.c:723 shmem_getpage_gfp+0x1164/0x2310 mm/shmem.c:1946 shmem_getpage mm/shmem.c:156 [inline] shmem_write_begin+0xce/0x1b0 mm/shmem.c:2480 generic_perform_write+0x2ad/0x670 mm/filemap.c:3857 __generic_file_write_iter+0x268/0x480 mm/filemap.c:3985 generic_file_write_iter+0xa9/0x1d0 mm/filemap.c:4017 __kernel_write+0x4e7/0x910 fs/read_write.c:539 __dump_emit+0x240/0x360 fs/coredump.c:880 dump_emit+0x383/0x3f0 fs/coredump.c:917 dump_user_range+0x86/0x1c0 fs/coredump.c:954 elf_core_dump+0x2ae5/0x3020 fs/binfmt_elf.c:2285 do_coredump+0x141b/0x2860 fs/coredump.c:831 get_signal+0x38d/0x1480 kernel/signal.c:2893 arch_do_signal_or_restart+0xc1/0x10f0 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:320 irqentry_exit+0x12/0x40 kernel/entry/common.c:411 exc_page_fault+0x5e/0xb0 arch/x86/mm/fault.c:1568 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:606 RIP: 0033:0x7fe43d97e931 Code: 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 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f RSP: 002b:0000000000000030 EFLAGS: 00010217 RAX: 0000000000000000 RBX: 00007fe43dba6160 RCX: 00007fe43d97e929 RDX: 0000000000000000 RSI: 0000000000000030 RDI: 0000000000000600 RBP: 00007fe43da00b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fe43dba6160 R15: 00007ffeafa36f48 Allocated by task 6605: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] kmem_cache_alloc_trace+0x119/0x270 mm/slub.c:3269 kmalloc include/linux/slab.h:616 [inline] audit_log_d_path+0xc6/0x240 kernel/audit.c:2153 dump_common_audit_data security/lsm_audit.c:261 [inline] common_lsm_audit+0x88a/0x1600 security/lsm_audit.c:466 slow_avc_audit+0x1ac/0x220 security/selinux/avc.c:802 avc_xperms_audit security/selinux/avc.c:433 [inline] avc_has_extended_perms+0x8d3/0xdc0 security/selinux/avc.c:1107 ioctl_has_perm+0x394/0x4d0 security/selinux/hooks.c:3763 selinux_file_ioctl+0x377/0x480 security/selinux/hooks.c:-1 security_file_ioctl+0x74/0xa0 security/security.c:1556 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x53/0x1a0 fs/ioctl.c:860 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 6605: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1749 slab_free mm/slub.c:3521 [inline] kfree+0xc4/0x270 mm/slub.c:4583 audit_log_d_path+0x1f4/0x240 kernel/audit.c:2164 dump_common_audit_data security/lsm_audit.c:261 [inline] common_lsm_audit+0x88a/0x1600 security/lsm_audit.c:466 slow_avc_audit+0x1ac/0x220 security/selinux/avc.c:802 avc_xperms_audit security/selinux/avc.c:433 [inline] avc_has_extended_perms+0x8d3/0xdc0 security/selinux/avc.c:1107 ioctl_has_perm+0x394/0x4d0 security/selinux/hooks.c:3763 selinux_file_ioctl+0x377/0x480 security/selinux/hooks.c:-1 security_file_ioctl+0x74/0xa0 security/security.c:1556 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x53/0x1a0 fs/ioctl.c:860 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888121298000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 5232 bytes to the right of 8192-byte region [ffff888121298000, ffff88812129a000) The buggy address belongs to the page: page:ffffea000484a600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x121298 head:ffffea000484a600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 dead000000000100 dead000000000122 ffff888100043500 raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5533, ts 458632524628, free_ts 457602087664 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605 prep_new_page+0x1c/0x110 mm/page_alloc.c:2611 get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485 __alloc_pages+0x18f/0x440 mm/page_alloc.c:5789 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1932 [inline] new_slab+0xa1/0x4d0 mm/slub.c:1995 ___slab_alloc+0x381/0x810 mm/slub.c:3028 __slab_alloc+0x49/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3250 [inline] __kmalloc+0x16a/0x2c0 mm/slub.c:4427 __kmalloc_node include/linux/slab.h:484 [inline] kmalloc_node include/linux/slab.h:639 [inline] kvmalloc_node+0x242/0x330 mm/util.c:628 kvmalloc include/linux/mm.h:851 [inline] kvmalloc_array include/linux/mm.h:869 [inline] __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:471 [inline] ptr_ring_init include/linux/ptr_ring.h:489 [inline] skb_array_init include/linux/skb_array.h:182 [inline] pfifo_fast_init+0x3af/0x7a0 net/sched/sch_generic.c:806 qdisc_create_dflt+0x142/0x3a0 net/sched/sch_generic.c:957 mq_init+0x2df/0x660 net/sched/sch_mq.c:90 qdisc_create_dflt+0x142/0x3a0 net/sched/sch_generic.c:957 attach_default_qdiscs net/sched/sch_generic.c:1136 [inline] dev_activate+0x124/0x1060 net/sched/sch_generic.c:1190 __dev_open+0x3aa/0x4c0 net/core/dev.c:1554 __dev_change_flags+0x20a/0x6a0 net/core/dev.c:8861 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1472 [inline] free_pcp_prepare mm/page_alloc.c:1544 [inline] free_unref_page_prepare+0x542/0x550 mm/page_alloc.c:3534 free_unref_page+0xa2/0x550 mm/page_alloc.c:3616 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5865 __free_slab+0xe8/0x1e0 mm/slub.c:2020 free_slab mm/slub.c:2035 [inline] discard_slab+0x29/0x40 mm/slub.c:2041 __slab_free+0x211/0x290 mm/slub.c:3426 do_slab_free mm/slub.c:3509 [inline] ___cache_free+0x104/0x120 mm/slub.c:3530 qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157 qlist_free_all+0x5f/0xb0 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xf0 mm/kasan/common.c:443 kasan_slab_alloc include/linux/kasan.h:217 [inline] slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550 slab_alloc_node mm/slub.c:3240 [inline] slab_alloc mm/slub.c:3250 [inline] __kmalloc_track_caller+0x11f/0x2c0 mm/slub.c:4949 kmalloc_reserve net/core/skbuff.c:357 [inline] __alloc_skb+0x21a/0x740 net/core/skbuff.c:428 alloc_skb include/linux/skbuff.h:1183 [inline] nlmsg_new include/net/netlink.h:953 [inline] inet_netconf_notify_devconf+0x169/0x220 net/ipv4/devinet.c:2123 __devinet_sysctl_unregister net/ipv4/devinet.c:2632 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2656 [inline] inetdev_destroy net/ipv4/devinet.c:327 [inline] inetdev_event+0x7c6/0x10a0 net/ipv4/devinet.c:1613 Memory state around the buggy address: ffff88812129b300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88812129b380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88812129b400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88812129b480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88812129b500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== syz.8.1935 (6922) used greatest stack depth: 17216 bytes left