================================================================== BUG: KASAN: out-of-bounds in ext4_xattr_set_entry+0x8e9/0x1e20 fs/ext4/xattr.c:1773 Read of size 18446744073709551572 at addr ffff888052572050 by task syz.0.0/5340 CPU: 0 UID: 0 PID: 5340 Comm: syz.0.0 Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 ext4_xattr_set_entry+0x8e9/0x1e20 fs/ext4/xattr.c:1773 ext4_xattr_block_set+0x872/0x2ac0 fs/ext4/xattr.c:2020 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0x12d5/0x1ea0 fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6306 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6349 [inline] __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6427 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6459 __mark_inode_dirty+0x2d1/0xdf0 fs/fs-writeback.c:2527 mark_inode_dirty include/linux/fs.h:2598 [inline] ext4_setattr+0xabc/0x1bc0 fs/ext4/inode.c:5971 notify_change+0xb33/0xe40 fs/attr.c:552 vfs_utimes+0x3fb/0x570 fs/utimes.c:66 do_utimes_path fs/utimes.c:99 [inline] do_utimes+0x1bd/0x2a0 fs/utimes.c:140 __do_sys_utime fs/utimes.c:221 [inline] __se_sys_utime fs/utimes.c:210 [inline] __x64_sys_utime+0x13e/0x200 fs/utimes.c:210 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6ef3b8e929 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:00007f6ef494c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000084 RAX: ffffffffffffffda RBX: 00007f6ef3db6080 RCX: 00007f6ef3b8e929 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000006a80 RBP: 00007f6ef3c10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6ef3db6080 R15: 00007ffefabfed68 Allocated by task 5340: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_node_track_caller_noprof+0x271/0x4e0 mm/slub.c:4347 kmemdup_noprof+0x2b/0x70 mm/util.c:137 kmemdup_noprof include/linux/fortify-string.h:765 [inline] ext4_xattr_block_set+0x781/0x2ac0 fs/ext4/xattr.c:1968 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0x12d5/0x1ea0 fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x30d/0x400 fs/ext4/inode.c:6306 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6349 [inline] __ext4_mark_inode_dirty+0x46c/0x700 fs/ext4/inode.c:6427 ext4_dirty_inode+0xd0/0x110 fs/ext4/inode.c:6459 __mark_inode_dirty+0x2d1/0xdf0 fs/fs-writeback.c:2527 mark_inode_dirty include/linux/fs.h:2598 [inline] ext4_setattr+0xabc/0x1bc0 fs/ext4/inode.c:5971 notify_change+0xb33/0xe40 fs/attr.c:552 vfs_utimes+0x3fb/0x570 fs/utimes.c:66 do_utimes_path fs/utimes.c:99 [inline] do_utimes+0x1bd/0x2a0 fs/utimes.c:140 __do_sys_utime fs/utimes.c:221 [inline] __se_sys_utime fs/utimes.c:210 [inline] __x64_sys_utime+0x13e/0x200 fs/utimes.c:210 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888052572000 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 80 bytes inside of 1024-byte region [ffff888052572000, ffff888052572400) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x52570 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801a441dc0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff88801a441dc0 dead000000000122 0000000000000000 head: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000 head: 04fff00000000002 ffffea0001495c01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 12, tgid 12 (kworker/u4:0), ts 115151201689, free_ts 114960713633 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] __do_kmalloc_node mm/slub.c:4327 [inline] __kmalloc_noprof+0x305/0x4f0 mm/slub.c:4340 kmalloc_noprof include/linux/slab.h:909 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] ieee802_11_parse_elems_full+0x152/0x2b20 net/mac80211/parse.c:1013 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2414 [inline] ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2421 [inline] ieee80211_inform_bss+0x10c/0x10a0 net/mac80211/scan.c:79 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline] cfg80211_inform_single_bss_data+0xd05/0x1ac0 net/wireless/scan.c:2367 cfg80211_inform_bss_data+0x1fb/0x3b20 net/wireless/scan.c:3222 cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3313 ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226 ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline] ieee80211_ibss_rx_queued_mgmt+0xa36/0x2ae0 net/mac80211/ibss.c:1600 ieee80211_iface_process_skb net/mac80211/iface.c:1668 [inline] ieee80211_iface_work+0x806/0xfe0 net/mac80211/iface.c:1722 cfg80211_wiphy_work+0x2df/0x460 net/wireless/core.c:435 page last free pid 54 tgid 54 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 discard_slab mm/slub.c:2717 [inline] __put_partials+0x161/0x1c0 mm/slub.c:3186 put_cpu_partial+0x17c/0x250 mm/slub.c:3261 __slab_free+0x2f7/0x400 mm/slub.c:4513 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x1be/0x3d0 mm/slub.c:4354 kmalloc_noprof include/linux/slab.h:905 [inline] kzalloc_noprof include/linux/slab.h:1039 [inline] nsim_fib6_rt_create drivers/net/netdevsim/fib.c:547 [inline] nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline] nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline] nsim_fib_event_work+0x1174/0x3180 drivers/net/netdevsim/fib.c:1493 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff888052571f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888052571f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888052572000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888052572080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888052572100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================