================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_trim_fs+0x710/0x9e0 fs/ntfs3/bitmap.c:1434 Read of size 2 at addr ffff88807a688498 by task syz-executor.4/12268 CPU: 1 PID: 12268 Comm: syz-executor.4 Not tainted 6.1.0-rc8-syzkaller-00148-g0d1409e4ff08 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:284 print_report+0x107/0x1f0 mm/kasan/report.c:395 kasan_report+0xcd/0x100 mm/kasan/report.c:495 ntfs_trim_fs+0x710/0x9e0 fs/ntfs3/bitmap.c:1434 ntfs_ioctl_fitrim fs/ntfs3/file.c:40 [inline] ntfs_ioctl+0x2d4/0x3a0 fs/ntfs3/file.c:57 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f828388c0d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f82846bc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f82839abf80 RCX: 00007f828388c0d9 RDX: 00000000200000c0 RSI: 00000000c0185879 RDI: 0000000000000004 RBP: 00007f82838e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffff6dc701f R14: 00007f82846bc300 R15: 0000000000022000 Allocated by task 3661: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:955 [inline] __kmalloc_node+0xaf/0x190 mm/slab_common.c:962 kmalloc_node include/linux/slab.h:579 [inline] __vmalloc_area_node mm/vmalloc.c:3029 [inline] __vmalloc_node_range+0x5f4/0x1400 mm/vmalloc.c:3213 __vmalloc_node mm/vmalloc.c:3278 [inline] vzalloc+0x75/0x80 mm/vmalloc.c:3351 alloc_counters+0xca/0x7d0 net/ipv4/netfilter/ip_tables.c:801 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:839 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline] do_ip6t_get_ctl+0xe86/0x17b0 net/ipv6/netfilter/ip6_tables.c:1672 nf_getsockopt+0x2ab/0x2d0 net/netfilter/nf_sockopt.c:116 ipv6_getsockopt+0x285/0x3d0 net/ipv6/ipv6_sockglue.c:1513 tcp_getsockopt+0x183/0x230 net/ipv4/tcp.c:4401 __sys_getsockopt+0x2db/0x5d0 net/socket.c:2296 __do_sys_getsockopt net/socket.c:2311 [inline] __se_sys_getsockopt net/socket.c:2308 [inline] __x64_sys_getsockopt+0xb1/0xc0 net/socket.c:2308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 3661: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:511 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1750 slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3674 __vunmap+0x91c/0x9e0 mm/vmalloc.c:2718 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:884 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1041 [inline] do_ip6t_get_ctl+0x12a3/0x17b0 net/ipv6/netfilter/ip6_tables.c:1672 nf_getsockopt+0x2ab/0x2d0 net/netfilter/nf_sockopt.c:116 ipv6_getsockopt+0x285/0x3d0 net/ipv6/ipv6_sockglue.c:1513 tcp_getsockopt+0x183/0x230 net/ipv4/tcp.c:4401 __sys_getsockopt+0x2db/0x5d0 net/socket.c:2296 __do_sys_getsockopt net/socket.c:2311 [inline] __se_sys_getsockopt net/socket.c:2308 [inline] __x64_sys_getsockopt+0xb1/0xc0 net/socket.c:2308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807a688488 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 8 bytes to the right of 8-byte region [ffff88807a688488, ffff88807a688490) The buggy address belongs to the physical page: page:ffffea0001e9a200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7a688 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000001 ffff888012841280 raw: 0000000000000000 0000000080660066 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 3734, tgid 3734 (kworker/1:7), ts 207270865578, free_ts 207226372098 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4291 __alloc_pages+0x259/0x560 mm/page_alloc.c:5558 alloc_slab_page+0xbd/0x190 mm/slub.c:1794 allocate_slab+0x5e/0x4b0 mm/slub.c:1939 new_slab mm/slub.c:1992 [inline] ___slab_alloc+0x782/0xe20 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x252/0x310 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc+0x9e/0x1a0 mm/slab_common.c:968 kmalloc_array include/linux/slab.h:605 [inline] kcalloc include/linux/slab.h:636 [inline] nsim_fib6_event_init drivers/net/netdevsim/fib.c:810 [inline] nsim_fib6_prepare_event drivers/net/netdevsim/fib.c:947 [inline] nsim_fib_event_schedule_work drivers/net/netdevsim/fib.c:1003 [inline] nsim_fib_event_nb+0x1e5/0xfd0 drivers/net/netdevsim/fib.c:1043 notifier_call_chain kernel/notifier.c:87 [inline] atomic_notifier_call_chain+0x157/0x260 kernel/notifier.c:225 call_fib_notifiers+0x2d/0x60 net/core/fib_notifier.c:35 call_fib6_entry_notifiers net/ipv6/ip6_fib.c:402 [inline] fib6_add_rt2node net/ipv6/ip6_fib.c:1224 [inline] fib6_add+0x1c3a/0x3c70 net/ipv6/ip6_fib.c:1478 __ip6_ins_rt net/ipv6/route.c:1302 [inline] ip6_ins_rt+0x12a/0x1b0 net/ipv6/route.c:1312 __ipv6_ifa_notify+0x56d/0xe20 net/ipv6/addrconf.c:6157 ipv6_ifa_notify net/ipv6/addrconf.c:6196 [inline] addrconf_dad_completed+0x167/0xc70 net/ipv6/addrconf.c:4209 addrconf_dad_work+0xd61/0x16a0 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare+0x80c/0x8f0 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x7d/0x5f0 mm/page_alloc.c:3483 free_slab mm/slub.c:2031 [inline] discard_slab mm/slub.c:2037 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2586 put_cpu_partial+0x106/0x170 mm/slub.c:2662 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x1f/0x70 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3398 [inline] __kmem_cache_alloc_node+0x1d7/0x310 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc+0x9e/0x1a0 mm/slab_common.c:968 kmalloc_array include/linux/slab.h:605 [inline] genl_family_rcv_msg_attrs_parse+0xa1/0x290 net/netlink/genetlink.c:560 genl_family_rcv_msg_doit net/netlink/genetlink.c:734 [inline] genl_family_rcv_msg net/netlink/genetlink.c:833 [inline] genl_rcv_msg+0x7af/0xf20 net/netlink/genetlink.c:850 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2540 genl_rcv+0x24/0x40 net/netlink/genetlink.c:861 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7e7/0x9c0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x9b3/0xcd0 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] __sys_sendto+0x46e/0x5f0 net/socket.c:2117 Memory state around the buggy address: ffff88807a688380: fc fc fc 02 fc fc fc fc 05 fc fc fc fc 00 fc fc ffff88807a688400: fc fc fa fc fc fc fc 02 fc fc fc fc fa fc fc fc >ffff88807a688480: fc fa fc fc fc fc fb fc fc fc fc fa fc fc fc fc ^ ffff88807a688500: fa fc fc fc fc fb fc fc fc fc fa fc fc fc fc fa ffff88807a688580: fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa fc ==================================================================