================================================================== BUG: KASAN: slab-out-of-bounds in should_fault_in_pages fs/gfs2/file.c:784 [inline] BUG: KASAN: slab-out-of-bounds in gfs2_file_direct_write fs/gfs2/file.c:923 [inline] BUG: KASAN: slab-out-of-bounds in gfs2_file_write_iter+0x872/0xf10 fs/gfs2/file.c:1139 Read of size 8 at addr ffff88808089c700 by task syz-executor.3/11521 CPU: 1 PID: 11521 Comm: syz-executor.3 Not tainted 5.15.131-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x63/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0x16b/0x1c0 mm/kasan/report.c:451 should_fault_in_pages fs/gfs2/file.c:784 [inline] gfs2_file_direct_write fs/gfs2/file.c:923 [inline] gfs2_file_write_iter+0x872/0xf10 fs/gfs2/file.c:1139 do_iter_readv_writev+0x594/0x7a0 do_iter_write+0x1ea/0x760 fs/read_write.c:855 iter_file_splice_write+0x806/0xfa0 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891 do_splice_direct+0x285/0x3d0 fs/splice.c:979 do_sendfile+0x625/0xff0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303 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+0x61/0xcb RIP: 0033:0x7fabce956ae9 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:00007fabcced80c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fabcea75f80 RCX: 00007fabce956ae9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007fabce9a247a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000008800000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fabcea75f80 R15: 00007ffff2905b08 Allocated by task 11521: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] __kmalloc+0x168/0x300 mm/slub.c:4407 kmalloc_array include/linux/slab.h:631 [inline] kcalloc include/linux/slab.h:660 [inline] iter_file_splice_write+0x27b/0xfa0 fs/splice.c:628 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:936 splice_direct_to_actor+0x500/0xc10 fs/splice.c:891 do_splice_direct+0x285/0x3d0 fs/splice.c:979 do_sendfile+0x625/0xff0 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0x178/0x1e0 fs/read_write.c:1303 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+0x61/0xcb Last potentially related work creation: kasan_save_stack+0x36/0x60 mm/kasan/common.c:38 kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348 kvfree_call_rcu+0x118/0x8a0 kernel/rcu/tree.c:3583 drop_sysctl_table+0x317/0x460 fs/proc/proc_sysctl.c:1680 drop_sysctl_table+0x329/0x460 fs/proc/proc_sysctl.c:1683 unregister_sysctl_table+0x88/0x130 fs/proc/proc_sysctl.c:1718 __devinet_sysctl_unregister net/ipv4/devinet.c:2600 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2628 [inline] inetdev_destroy net/ipv4/devinet.c:324 [inline] inetdev_event+0x7ba/0x1490 net/ipv4/devinet.c:1598 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:1998 [inline] call_netdevice_notifiers_extack net/core/dev.c:2010 [inline] call_netdevice_notifiers net/core/dev.c:2024 [inline] unregister_netdevice_many+0xf1b/0x18f0 net/core/dev.c:11067 default_device_exit_batch+0x390/0x3f0 net/core/dev.c:11596 ops_exit_list net/core/net_namespace.c:174 [inline] cleanup_net+0x763/0xb60 net/core/net_namespace.c:596 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff88808089c600 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 0 bytes to the right of 256-byte region [ffff88808089c600, ffff88808089c700) The buggy address belongs to the page: page:ffffea0002022700 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88808089c800 pfn:0x8089c head:ffffea0002022700 order:1 compound_mapcount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea00008b8680 0000000400000004 ffff888011c41b40 raw: ffff88808089c800 000000008010000c 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3539, ts 217404402892, free_ts 0 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159 __alloc_pages+0x272/0x700 mm/page_alloc.c:5421 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xbb/0x4b0 mm/slub.c:1975 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] __kmalloc+0x1c9/0x300 mm/slub.c:4403 kmalloc include/linux/slab.h:596 [inline] kzalloc include/linux/slab.h:721 [inline] new_dir fs/proc/proc_sysctl.c:954 [inline] get_subdir fs/proc/proc_sysctl.c:999 [inline] __register_sysctl_table+0x9f1/0x1220 fs/proc/proc_sysctl.c:1348 __addrconf_sysctl_register+0x28f/0x3e0 net/ipv6/addrconf.c:7063 addrconf_sysctl_register+0x128/0x180 net/ipv6/addrconf.c:7110 ipv6_add_dev+0xc96/0x1180 net/ipv6/addrconf.c:452 addrconf_notify+0x671/0xf30 net/ipv6/addrconf.c:3557 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xd0/0x170 kernel/notifier.c:391 call_netdevice_notifiers_info net/core/dev.c:1998 [inline] call_netdevice_notifiers_extack net/core/dev.c:2010 [inline] call_netdevice_notifiers+0x145/0x1b0 net/core/dev.c:2024 register_netdevice+0x12c2/0x1700 net/core/dev.c:10362 wg_newlink+0x4a1/0x740 drivers/net/wireguard/device.c:355 __rtnl_newlink net/core/rtnetlink.c:3501 [inline] rtnl_newlink+0x14bd/0x2070 net/core/rtnetlink.c:3549 rtnetlink_rcv_msg+0x993/0xee0 net/core/rtnetlink.c:5630 page_owner free stack trace missing Memory state around the buggy address: ffff88808089c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88808089c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88808089c700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88808089c780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88808089c800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================