ffff88805b335be0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ffff88805b335bf0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ ================================================================== BUG: KASAN: slab-out-of-bounds in hex_dump_to_buffer+0x731/0xba0 lib/hexdump.c:193 Read of size 1 at addr ffff88805b335c00 by task syz-executor.0/11674 CPU: 1 PID: 11674 Comm: syz-executor.0 Not tainted 6.10.0-rc1-syzkaller-00304-g83814698cf48 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 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 hex_dump_to_buffer+0x731/0xba0 lib/hexdump.c:193 print_hex_dump+0x13f/0x250 lib/hexdump.c:276 ea_get+0xce0/0x1290 fs/jfs/xattr.c:561 __jfs_getxattr+0xd5/0x380 fs/jfs/xattr.c:807 __vfs_getxattr+0x433/0x470 fs/xattr.c:423 smk_fetch+0xb1/0x140 security/smack/smack_lsm.c:306 smack_d_instantiate+0x749/0xa50 security/smack/smack_lsm.c:3588 security_d_instantiate+0x9f/0x100 security/security.c:3916 d_splice_alias+0x6f/0x330 fs/dcache.c:2973 jfs_lookup+0x2c0/0x410 fs/jfs/namei.c:1474 __lookup_slow+0x28c/0x3f0 fs/namei.c:1692 lookup_slow+0x53/0x70 fs/namei.c:1709 walk_component+0x2e1/0x410 fs/namei.c:2004 lookup_last fs/namei.c:2469 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2493 filename_lookup+0x256/0x610 fs/namei.c:2522 do_linkat+0x13f/0x6f0 fs/namei.c:4663 __do_sys_link fs/namei.c:4717 [inline] __se_sys_link fs/namei.c:4715 [inline] __x64_sys_link+0x86/0xa0 fs/namei.c:4715 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7f3ba7cee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7f3c8e20c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000056 RAX: ffffffffffffffda RBX: 00007f7f3bbb3fa0 RCX: 00007f7f3ba7cee9 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000020000200 RBP: 00007f7f3bac947f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f7f3bbb3fa0 R15: 00007ffca1eaf848 Allocated by task 11674: 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:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4019 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1ad/0x850 fs/inode.c:1280 jfs_iget+0x22/0x3b0 fs/jfs/inode.c:29 jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469 __lookup_slow+0x28c/0x3f0 fs/namei.c:1692 lookup_slow+0x53/0x70 fs/namei.c:1709 walk_component+0x2e1/0x410 fs/namei.c:2004 lookup_last fs/namei.c:2469 [inline] path_lookupat+0x16f/0x450 fs/namei.c:2493 filename_lookup+0x256/0x610 fs/namei.c:2522 do_linkat+0x13f/0x6f0 fs/namei.c:4663 __do_sys_link fs/namei.c:4717 [inline] __se_sys_link fs/namei.c:4715 [inline] __x64_sys_link+0x86/0xa0 fs/namei.c:4715 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805b335340 which belongs to the cache jfs_ip of size 2240 The buggy address is located 0 bytes to the right of allocated 2240-byte region [ffff88805b335340, ffff88805b335c00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805b3365c0 pfn:0x5b330 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88802cb1d701 anon flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff88801ab42780 0000000000000000 0000000000000001 raw: ffff88805b3365c0 00000000800d0008 00000001ffffefff ffff88802cb1d701 head: 00fff00000000040 ffff88801ab42780 0000000000000000 0000000000000001 head: ffff88805b3365c0 00000000800d0008 00000001ffffefff ffff88802cb1d701 head: 00fff00000000003 ffffea00016ccc01 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 Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 6119, tgid 6117 (syz-executor.4), ts 125726378486, free_ts 118789961483 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2e2d/0x2ee0 mm/page_alloc.c:3402 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2264 allocate_slab+0x5a/0x2e0 mm/slub.c:2427 new_slab mm/slub.c:2480 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666 __slab_alloc+0x58/0xa0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4019 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1ad/0x850 fs/inode.c:1280 jfs_iget+0x22/0x3b0 fs/jfs/inode.c:29 jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469 lookup_open fs/namei.c:3483 [inline] open_last_lookups fs/namei.c:3574 [inline] path_openat+0x1033/0x3280 fs/namei.c:3804 do_filp_open+0x235/0x490 fs/namei.c:3834 do_sys_openat2+0x13e/0x1d0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_creat fs/open.c:1496 [inline] __se_sys_creat fs/open.c:1490 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1490 page last free pid 1568 tgid 1568 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd19/0xea0 mm/page_alloc.c:2565 discard_slab mm/slub.c:2526 [inline] __put_partials+0xeb/0x130 mm/slub.c:2994 put_cpu_partial+0x17c/0x250 mm/slub.c:3069 __slab_free+0x2ea/0x3d0 mm/slub.c:4306 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:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4043 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:656 alloc_skb include/linux/skbuff.h:1308 [inline] nlmsg_new include/net/netlink.h:1015 [inline] inet6_netconf_notify_devconf+0xfc/0x1c0 net/ipv6/addrconf.c:589 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7249 [inline] addrconf_sysctl_unregister net/ipv6/addrconf.c:7273 [inline] addrconf_ifdown+0x187e/0x1bc0 net/ipv6/addrconf.c:4008 addrconf_notify+0x3cb/0x1020 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:93 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers net/core/dev.c:2044 [inline] unregister_netdevice_many_notify+0xd75/0x16b0 net/core/dev.c:11218 unregister_netdevice_many net/core/dev.c:11276 [inline] default_device_exit_batch+0xa0f/0xa90 net/core/dev.c:11759 ops_exit_list net/core/net_namespace.c:178 [inline] cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640 Memory state around the buggy address: ffff88805b335b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805b335b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805b335c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805b335c80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805b335d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================