================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x11b3/0x3a60 fs/ext4/xattr.c:1731 Read of size 18446744073709551540 at addr ffff888117418070 by task syz.7.273/1403 CPU: 1 PID: 1403 Comm: syz.7.273 Not tainted 5.10.226-syzkaller-00031-gb14940b90491 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:452 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189 memmove+0x2d/0x70 mm/kasan/shadow.c:54 ext4_xattr_set_entry+0x11b3/0x3a60 fs/ext4/xattr.c:1731 ext4_xattr_block_set+0x8f9/0x3400 fs/ext4/xattr.c:1988 ext4_xattr_set_handle+0x11cd/0x14e0 fs/ext4/xattr.c:2394 ext4_xattr_set+0x231/0x3d0 fs/ext4/xattr.c:2504 ext4_xattr_trusted_set+0x3b/0x50 fs/ext4/xattr_trusted.c:37 __vfs_setxattr+0x404/0x450 fs/xattr.c:177 __vfs_setxattr_noperm+0x11d/0x4f0 fs/xattr.c:208 __vfs_setxattr_locked+0x1f9/0x210 fs/xattr.c:266 vfs_setxattr+0x112/0x2c0 fs/xattr.c:283 setxattr+0x1ea/0x3f0 fs/xattr.c:548 path_setxattr+0x169/0x240 fs/xattr.c:567 __do_sys_lsetxattr fs/xattr.c:589 [inline] __se_sys_lsetxattr fs/xattr.c:585 [inline] __x64_sys_lsetxattr+0xc2/0xe0 fs/xattr.c:585 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f5fe944d819 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:00007f5fe7ac6038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f5fe9604fa0 RCX: 00007f5fe944d819 RDX: 0000000020000040 RSI: 00000000200000c0 RDI: 0000000020000100 RBP: 00007f5fe94c075e R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000fe37 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5fe9604fa0 R15: 00007ffedf801c38 Allocated by task 967: 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:430 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:509 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:518 kasan_kmalloc include/linux/kasan.h:254 [inline] kmem_cache_alloc_trace+0x18a/0x2e0 mm/slub.c:2974 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] bpf_prog_alloc_no_stats+0x85/0x2a0 kernel/bpf/core.c:96 bpf_prog_alloc+0x21/0x1e0 kernel/bpf/core.c:120 bpf_prog_load kernel/bpf/syscall.c:2180 [inline] __do_sys_bpf kernel/bpf/syscall.c:4435 [inline] __se_sys_bpf+0x9856/0x11cb0 kernel/bpf/syscall.c:4391 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:4391 do_syscall_64+0x34/0x70 entry_SYSCALL_64_after_hwframe+0x61/0xcb Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 insert_work+0x56/0x310 kernel/workqueue.c:1352 __queue_work+0x970/0xd10 kernel/workqueue.c:1518 queue_work_on+0x105/0x160 kernel/workqueue.c:1545 queue_work include/linux/workqueue.h:515 [inline] schedule_work include/linux/workqueue.h:576 [inline] bpf_prog_free+0x139/0x150 kernel/bpf/core.c:2224 __bpf_prog_put_rcu+0x149/0x170 kernel/bpf/syscall.c:1756 rcu_do_batch+0x597/0xc40 kernel/rcu/tree.c:2494 rcu_core+0x5ad/0xe40 kernel/rcu/tree.c:2735 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2748 __do_softirq+0x268/0x5bb kernel/softirq.c:309 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd3/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:2976 [inline] call_rcu+0x135/0x11f0 kernel/rcu/tree.c:3050 __bpf_prog_put_noref kernel/bpf/syscall.c:1769 [inline] __bpf_prog_put kernel/bpf/syscall.c:1782 [inline] bpf_prog_put+0x2d2/0x3a0 kernel/bpf/syscall.c:1788 bpf_prog_release+0x3b/0x40 kernel/bpf/syscall.c:1796 __fput+0x33d/0x7b0 fs/file_table.c:281 ____fput+0x15/0x20 fs/file_table.c:314 task_work_run+0x129/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline] syscall_exit_to_user_mode+0xa2/0x1a0 kernel/entry/common.c:274 do_syscall_64+0x40/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888117418000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 112 bytes inside of 1024-byte region [ffff888117418000, ffff888117418400) The buggy address belongs to the page: page:ffffea00045d0600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x117418 head:ffffea00045d0600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 0000000000000000 0000000100000001 ffff888100042f00 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 95, ts 32811864860, free_ts 32690436314 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x166/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2d8c/0x2f30 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x435/0xaf0 mm/page_alloc.c:5348 allocate_slab mm/slub.c:1808 [inline] new_slab+0x80/0x400 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x302/0x4b0 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] __kmalloc_track_caller+0x1f8/0x320 mm/slub.c:4536 __kmalloc_reserve net/core/skbuff.c:144 [inline] __alloc_skb+0xbc/0x510 net/core/skbuff.c:212 alloc_skb include/linux/skbuff.h:1126 [inline] alloc_uevent_skb+0x80/0x230 lib/kobject_uevent.c:290 uevent_net_broadcast_untagged lib/kobject_uevent.c:326 [inline] kobject_uevent_net_broadcast+0x311/0x590 lib/kobject_uevent.c:409 kobject_uevent_env+0x525/0x700 lib/kobject_uevent.c:608 kobject_synth_uevent+0x4eb/0xae0 lib/kobject_uevent.c:208 uevent_store+0x25/0x60 drivers/base/core.c:2323 dev_attr_store+0x5c/0x80 drivers/base/core.c:2019 sysfs_kf_write+0x123/0x140 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x2c4/0x410 fs/kernfs/file.c:296 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1349 [inline] free_pcp_prepare mm/page_alloc.c:1421 [inline] free_unref_page_prepare+0x2ae/0x2d0 mm/page_alloc.c:3336 free_unref_page_list+0x122/0xb20 mm/page_alloc.c:3443 release_pages+0xea0/0xef0 mm/swap.c:1103 __pagevec_release+0x84/0x100 mm/swap.c:1123 pagevec_release include/linux/pagevec.h:88 [inline] truncate_inode_pages_range+0xa81/0x1ae0 mm/truncate.c:367 truncate_inode_pages+0x24/0x30 mm/truncate.c:473 kill_bdev fs/block_dev.c:86 [inline] __blkdev_put+0x307/0x740 fs/block_dev.c:1795 blkdev_put+0x2f2/0x3d0 fs/block_dev.c:1863 kill_block_super+0xb3/0xe0 fs/super.c:1470 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4585 deactivate_locked_super+0xad/0x110 fs/super.c:335 deactivate_super+0xbe/0xf0 fs/super.c:366 cleanup_mnt+0x45c/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x129/0x190 kernel/task_work.c:189 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop+0xbf/0xd0 kernel/entry/common.c:172 Memory state around the buggy address: ffff888117417f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ffff888117417f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888117418000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888117418080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888117418100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================