================================================================== BUG: KASAN: slab-out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: slab-out-of-bounds in atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] BUG: KASAN: slab-out-of-bounds in __refcount_add include/linux/refcount.h:184 [inline] BUG: KASAN: slab-out-of-bounds in __refcount_inc include/linux/refcount.h:241 [inline] BUG: KASAN: slab-out-of-bounds in refcount_inc include/linux/refcount.h:258 [inline] BUG: KASAN: slab-out-of-bounds in sock_hold include/net/sock.h:774 [inline] BUG: KASAN: slab-out-of-bounds in sco_sock_timeout+0x67/0x240 net/bluetooth/sco.c:88 Write of size 4 at addr ffff888065771080 by task kworker/0:7/5147 CPU: 0 PID: 5147 Comm: kworker/0:7 Not tainted 6.9.0-rc3-next-20240412-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: events sco_sock_timeout Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] sock_hold include/net/sock.h:774 [inline] sco_sock_timeout+0x67/0x240 net/bluetooth/sco.c:88 process_one_work kernel/workqueue.c:3218 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3299 worker_thread+0x86d/0xd70 kernel/workqueue.c:3380 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 8854: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3897 [inline] slab_alloc_node mm/slub.c:3957 [inline] kmem_cache_alloc_noprof+0x135/0x290 mm/slub.c:3964 getname_flags+0xbd/0x4f0 fs/namei.c:139 do_sys_openat2+0xd2/0x1d0 fs/open.c:1400 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 8854: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2190 [inline] slab_free mm/slub.c:4393 [inline] kmem_cache_free+0x145/0x340 mm/slub.c:4468 do_sys_openat2+0x17a/0x1d0 fs/open.c:1414 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888065770000 which belongs to the cache names_cache of size 4096 The buggy address is located 128 bytes to the right of allocated 4096-byte region [ffff888065770000, ffff888065771000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x65770 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff80000000040(head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffefff(slab) raw: 00fff80000000040 ffff8880162a8780 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000070007 00000001ffffefff 0000000000000000 head: 00fff80000000040 ffff8880162a8780 dead000000000122 0000000000000000 head: 0000000000000000 0000000000070007 00000001ffffefff 0000000000000000 head: 00fff80000000003 ffffea000195dc01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 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 8854, tgid 331890218 (modprobe), ts 8854, free_ts 232185194833 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1474 prep_new_page mm/page_alloc.c:1482 [inline] get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3444 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4702 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline] alloc_pages_node_noprof include/linux/gfp.h:271 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2259 allocate_slab+0x5a/0x2e0 mm/slub.c:2422 new_slab mm/slub.c:2475 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3624 __slab_alloc+0x58/0xa0 mm/slub.c:3714 __slab_alloc_node mm/slub.c:3767 [inline] slab_alloc_node mm/slub.c:3945 [inline] kmem_cache_alloc_noprof+0x1c1/0x290 mm/slub.c:3964 getname_flags+0xbd/0x4f0 fs/namei.c:139 do_sys_openat2+0xd2/0x1d0 fs/open.c:1400 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 8850 tgid 8847 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2607 __slab_free+0x31b/0x3d0 mm/slub.c:4304 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3897 [inline] slab_alloc_node mm/slub.c:3957 [inline] kmem_cache_alloc_noprof+0x135/0x290 mm/slub.c:3964 getname_flags+0xbd/0x4f0 fs/namei.c:139 user_path_at_empty+0x2c/0x60 fs/namei.c:2920 user_path_at include/linux/namei.h:57 [inline] __do_sys_mount_setattr fs/namespace.c:4686 [inline] __se_sys_mount_setattr+0x649/0x1b40 fs/namespace.c:4647 do_syscall_x64 arch/x86/entry/common.c:74 [inline] do_syscall_64+0xfa/0x250 arch/x86/entry/common.c:105 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888065770f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888065771000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888065771080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888065771100: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888065771180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================