loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): encrypted files will use data=ordered instead of data journaling mode EXT4-fs (loop6): 1 truncate cleaned up EXT4-fs (loop6): mounted filesystem without journal. Quota mode: writeback. ================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732 Read of size 18446744073709551572 at addr ffff888117363050 by task syz.6.150/748 CPU: 0 PID: 748 Comm: syz.6.150 Not tainted 6.1.128-syzkaller-00002-g44db4837f75e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x909/0x1fa0 fs/ext4/xattr.c:1732 ext4_xattr_block_set+0x99c/0x37f0 fs/ext4/xattr.c:1979 ext4_xattr_move_to_block fs/ext4/xattr.c:2616 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0x10eb/0x1c40 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x31a/0x420 fs/ext4/inode.c:5938 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5981 [inline] __ext4_mark_inode_dirty+0x4bb/0x7d0 fs/ext4/inode.c:6059 ext4_dirty_inode+0xbd/0x100 fs/ext4/inode.c:6091 __mark_inode_dirty+0x200/0xa60 fs/fs-writeback.c:2439 mark_inode_dirty include/linux/fs.h:2555 [inline] ext4_setattr+0x7b9/0x1a50 fs/ext4/inode.c:5615 notify_change+0xd53/0x1010 fs/attr.c:499 vfs_utimes+0x4b1/0x760 fs/utimes.c:65 do_utimes_path fs/utimes.c:98 [inline] do_utimes fs/utimes.c:144 [inline] __do_sys_utime fs/utimes.c:225 [inline] __se_sys_utime+0x1bb/0x2b0 fs/utimes.c:214 __x64_sys_utime+0x5b/0x70 fs/utimes.c:214 x64_sys_call+0x3c4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:133 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f8ee4b8d169 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:00007f8ee5911038 EFLAGS: 00000246 ORIG_RAX: 0000000000000084 RAX: ffffffffffffffda RBX: 00007f8ee4da5fa0 RCX: 00007f8ee4b8d169 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000400000006a80 RBP: 00007f8ee4c0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8ee4da5fa0 R15: 00007ffd81cbd808 Allocated by task 748: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] __do_kmalloc_node mm/slab_common.c:938 [inline] __kmalloc_node_track_caller+0xb3/0x1e0 mm/slab_common.c:958 kmemdup+0x29/0x60 mm/util.c:134 _Z7kmemdupPKvU17pass_object_size0mj include/linux/fortify-string.h:585 [inline] ext4_xattr_block_set+0x80f/0x37f0 fs/ext4/xattr.c:1927 ext4_xattr_move_to_block fs/ext4/xattr.c:2616 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0x10eb/0x1c40 fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x31a/0x420 fs/ext4/inode.c:5938 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5981 [inline] __ext4_mark_inode_dirty+0x4bb/0x7d0 fs/ext4/inode.c:6059 ext4_dirty_inode+0xbd/0x100 fs/ext4/inode.c:6091 __mark_inode_dirty+0x200/0xa60 fs/fs-writeback.c:2439 mark_inode_dirty include/linux/fs.h:2555 [inline] ext4_setattr+0x7b9/0x1a50 fs/ext4/inode.c:5615 notify_change+0xd53/0x1010 fs/attr.c:499 vfs_utimes+0x4b1/0x760 fs/utimes.c:65 do_utimes_path fs/utimes.c:98 [inline] do_utimes fs/utimes.c:144 [inline] __do_sys_utime fs/utimes.c:225 [inline] __se_sys_utime+0x1bb/0x2b0 fs/utimes.c:214 __x64_sys_utime+0x5b/0x70 fs/utimes.c:214 x64_sys_call+0x3c4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:133 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888117363000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff888117363000, ffff888117363400) The buggy address belongs to the physical page: page:ffffea00045cd800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x117360 head:ffffea00045cd800 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head|zone=1) raw: 4000000000010200 ffffea00045fa400 dead000000000002 ffff888100043080 raw: 0000000000000000 0000000080100010 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 0x1d2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 422, tgid 422 (syz-executor), ts 32702094077, free_ts 31650363269 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2637 prep_new_page+0x1b/0x110 mm/page_alloc.c:2644 get_page_from_freelist+0x3a98/0x3b10 mm/page_alloc.c:4539 __alloc_pages+0x234/0x610 mm/page_alloc.c:5837 alloc_slab_page+0x6c/0xf0 allocate_slab mm/slub.c:1962 [inline] new_slab+0x90/0x3e0 mm/slub.c:2015 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203 __slab_alloc+0x5d/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x207/0x2a0 mm/slub.c:3462 __do_kmalloc_node mm/slab_common.c:937 [inline] __kmalloc_node_track_caller+0xa2/0x1e0 mm/slab_common.c:958 kmalloc_reserve net/core/skbuff.c:446 [inline] __alloc_skb+0x125/0x2d0 net/core/skbuff.c:515 alloc_skb include/linux/skbuff.h:1290 [inline] nlmsg_new include/net/netlink.h:991 [inline] inet6_rt_notify+0x308/0x550 net/ipv6/route.c:6169 fib6_add_rt2node net/ipv6/ip6_fib.c:1256 [inline] fib6_add+0x23ac/0x3dd0 net/ipv6/ip6_fib.c:1485 __ip6_ins_rt net/ipv6/route.c:1308 [inline] ip6_route_add+0x8a/0x130 net/ipv6/route.c:3855 addrconf_prefix_route net/ipv6/addrconf.c:2465 [inline] add_v4_addrs+0xa3a/0xfc0 net/ipv6/addrconf.c:3237 addrconf_gre_config net/ipv6/addrconf.c:3511 [inline] addrconf_init_auto_addrs+0x3e1/0x1050 net/ipv6/addrconf.c:3529 page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1545 [inline] free_pcp_prepare mm/page_alloc.c:1619 [inline] free_unref_page_prepare+0x9f1/0xa00 mm/page_alloc.c:3581 free_unref_page+0xb2/0x5c0 mm/page_alloc.c:3677 free_the_page mm/page_alloc.c:830 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5926 __free_slab+0xce/0x1a0 mm/slub.c:2039 free_slab mm/slub.c:2054 [inline] discard_slab mm/slub.c:2060 [inline] __unfreeze_partials+0x165/0x1a0 mm/slub.c:2609 put_cpu_partial+0xa9/0x100 mm/slub.c:2685 __slab_free+0x1c8/0x280 mm/slub.c:3563 do_slab_free mm/slub.c:3640 [inline] ___cache_free+0xc6/0xd0 mm/slub.c:3696 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0xc5/0x140 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:310 kasan_slab_alloc include/linux/kasan.h:202 [inline] slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768 slab_alloc_node mm/slub.c:3421 [inline] __kmem_cache_alloc_node+0x193/0x2a0 mm/slub.c:3462 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1028 kmalloc include/linux/slab.h:563 [inline] kzalloc include/linux/slab.h:699 [inline] usb_create_ep_devs+0x5a/0x250 drivers/usb/core/endpoint.c:156 create_intf_ep_devs drivers/usb/core/message.c:1248 [inline] usb_set_configuration+0x1a2b/0x1e80 drivers/usb/core/message.c:2171 Memory state around the buggy address: ffff888117362f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888117362f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888117363000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888117363080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888117363100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================