================================================================== BUG: KASAN: slab-out-of-bounds in ether_addr_equal include/linux/etherdevice.h:329 [inline] BUG: KASAN: slab-out-of-bounds in ipvlan_xmit_mode_l2 drivers/net/ipvlan/ipvlan_core.c:599 [inline] BUG: KASAN: slab-out-of-bounds in ipvlan_queue_xmit+0x158f/0x18a0 drivers/net/ipvlan/ipvlan_core.c:645 Read of size 4 at addr ffff88801bc5b7ff by task syz-executor326/8410 CPU: 0 PID: 8410 Comm: syz-executor326 Not tainted 5.12.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232 __kasan_report mm/kasan/report.c:399 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416 ether_addr_equal include/linux/etherdevice.h:329 [inline] ipvlan_xmit_mode_l2 drivers/net/ipvlan/ipvlan_core.c:599 [inline] ipvlan_queue_xmit+0x158f/0x18a0 drivers/net/ipvlan/ipvlan_core.c:645 ipvlan_start_xmit+0x45/0x190 drivers/net/ipvlan/ipvlan_main.c:222 __netdev_start_xmit include/linux/netdevice.h:4825 [inline] netdev_start_xmit include/linux/netdevice.h:4839 [inline] __dev_direct_xmit+0x527/0x730 net/core/dev.c:4262 dev_direct_xmit include/linux/netdevice.h:2873 [inline] packet_direct_xmit+0x1a5/0x280 net/packet/af_packet.c:244 packet_snd net/packet/af_packet.c:3006 [inline] packet_sendmsg+0x2405/0x52b0 net/packet/af_packet.c:3031 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 __sys_sendto+0x21c/0x320 net/socket.c:1977 __do_sys_sendto net/socket.c:1989 [inline] __se_sys_sendto net/socket.c:1985 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1985 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x44be69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 31 18 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 c4 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc5c50a498 EFLAGS: 00000212 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000000031 RCX: 000000000044be69 RDX: 000000000000000e RSI: 0000000020000080 RDI: 0000000000000005 RBP: 00007ffc5c50a530 R08: 0000000020000040 R09: 0000000000000014 R10: 0000000000000000 R11: 0000000000000212 R12: 0000000000000047 R13: 00007ffc5c50a4fa R14: 00007ffc5c50a510 R15: 00000000004bd4a0 Allocated by task 1: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:427 [inline] ____kasan_kmalloc mm/kasan/common.c:506 [inline] ____kasan_kmalloc mm/kasan/common.c:465 [inline] __kasan_kmalloc+0x99/0xc0 mm/kasan/common.c:515 kmalloc include/linux/slab.h:559 [inline] tomoyo_realpath_from_path+0xc3/0x620 security/tomoyo/realpath.c:254 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822 security_inode_getattr+0xcf/0x140 security/security.c:1288 vfs_getattr fs/stat.c:131 [inline] vfs_statx+0x164/0x390 fs/stat.c:199 vfs_fstatat fs/stat.c:217 [inline] vfs_lstat include/linux/fs.h:3240 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:372 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 1: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357 ____kasan_slab_free mm/kasan/common.c:360 [inline] ____kasan_slab_free mm/kasan/common.c:325 [inline] __kasan_slab_free+0xf5/0x130 mm/kasan/common.c:367 kasan_slab_free include/linux/kasan.h:199 [inline] slab_free_hook mm/slub.c:1562 [inline] slab_free_freelist_hook+0x92/0x210 mm/slub.c:1600 slab_free mm/slub.c:3161 [inline] kfree+0xe5/0x7f0 mm/slub.c:4213 tomoyo_realpath_from_path+0x191/0x620 security/tomoyo/realpath.c:291 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x21b/0x400 security/tomoyo/file.c:822 security_inode_getattr+0xcf/0x140 security/security.c:1288 vfs_getattr fs/stat.c:131 [inline] vfs_statx+0x164/0x390 fs/stat.c:199 vfs_fstatat fs/stat.c:217 [inline] vfs_lstat include/linux/fs.h:3240 [inline] __do_sys_newlstat+0x91/0x110 fs/stat.c:372 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae The buggy address belongs to the object at ffff88801bc5a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2047 bytes to the right of 4096-byte region [ffff88801bc5a000, ffff88801bc5b000) The buggy address belongs to the page: page:ffffea00006f1600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc58 head:ffffea00006f1600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head) raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010442140 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88801bc5b680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801bc5b700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801bc5b780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801bc5b800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801bc5b880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================