netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 ================================================================== BUG: KASAN: slab-out-of-bounds in vxlan_vnifilter_dump_dev+0x9a0/0xb40 drivers/net/vxlan/vxlan_vnifilter.c:349 Read of size 4 at addr ffff88801f1e0e70 by task syz-executor720/3590 CPU: 0 PID: 3590 Comm: syz-executor720 Tainted: G W 5.17.0-syzkaller-13034-gd888c83fcec7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 vxlan_vnifilter_dump_dev+0x9a0/0xb40 drivers/net/vxlan/vxlan_vnifilter.c:349 vxlan_vnifilter_dump+0x3ff/0x650 drivers/net/vxlan/vxlan_vnifilter.c:428 netlink_dump+0x4b5/0xb70 net/netlink/af_netlink.c:2270 __netlink_dump_start+0x647/0x900 net/netlink/af_netlink.c:2375 netlink_dump_start include/linux/netlink.h:245 [inline] rtnetlink_rcv_msg+0x70c/0xb80 net/core/rtnetlink.c:5953 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2496 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x543/0x7f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x904/0xe00 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x6e2/0x800 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2496 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4bbf2e5049 Code: 9d 01 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4bbf471f38 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4bbf2e5049 RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000004 RBP: 00007f4bbf471f70 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4bbf471f70 R13: 00007f4bbf471f50 R14: 0000000000000001 R15: 00007ffde15e068a Allocated by task 1: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:469 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:749 [inline] slab_alloc_node mm/slub.c:3217 [inline] slab_alloc mm/slub.c:3225 [inline] __kmem_cache_alloc_lru mm/slub.c:3232 [inline] kmem_cache_alloc+0x204/0x3b0 mm/slub.c:3242 kmem_cache_zalloc include/linux/slab.h:704 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:585 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:647 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:987 sysfs_add_file_mode_ns+0x20f/0x3f0 fs/sysfs/file.c:294 sysfs_create_file_ns+0x127/0x1c0 fs/sysfs/file.c:355 sysfs_create_file include/linux/sysfs.h:607 [inline] driver_create_file+0x48/0x70 drivers/base/driver.c:107 bus_add_driver+0x309/0x630 drivers/base/bus.c:624 driver_register+0x220/0x3a0 drivers/base/driver.c:171 do_one_initcall+0x103/0x650 init/main.c:1298 do_initcall_level init/main.c:1371 [inline] do_initcalls init/main.c:1387 [inline] do_basic_setup init/main.c:1406 [inline] kernel_init_freeable+0x6b1/0x73a init/main.c:1613 kernel_init+0x1a/0x1d0 init/main.c:1502 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 The buggy address belongs to the object at ffff88801f1e0d98 which belongs to the cache kernfs_node_cache of size 168 The buggy address is located 48 bytes to the right of 168-byte region [ffff88801f1e0d98, ffff88801f1e0e40) The buggy address belongs to the physical page: page:ffffea00007c7800 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f1e0 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888010dccb40 raw: 0000000000000000 0000000000110011 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 8639632616, free_ts 8638600022 prep_new_page mm/page_alloc.c:2438 [inline] get_page_from_freelist+0xba2/0x3df0 mm/page_alloc.c:4179 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5405 alloc_page_interleave+0x1e/0x200 mm/mempolicy.c:2107 alloc_pages+0x2b1/0x310 mm/mempolicy.c:2257 alloc_slab_page mm/slub.c:1799 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1944 new_slab mm/slub.c:2004 [inline] ___slab_alloc+0x8df/0xf20 mm/slub.c:3005 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3092 slab_alloc_node mm/slub.c:3183 [inline] slab_alloc mm/slub.c:3225 [inline] __kmem_cache_alloc_lru mm/slub.c:3232 [inline] kmem_cache_alloc+0x360/0x3b0 mm/slub.c:3242 kmem_cache_zalloc include/linux/slab.h:704 [inline] __kernfs_new_node+0xd4/0x8b0 fs/kernfs/dir.c:585 kernfs_new_node+0x93/0x120 fs/kernfs/dir.c:647 __kernfs_create_file+0x51/0x350 fs/kernfs/file.c:987 sysfs_add_file_mode_ns+0x20f/0x3f0 fs/sysfs/file.c:294 sysfs_create_file_ns+0x127/0x1c0 fs/sysfs/file.c:355 sysfs_create_file include/linux/sysfs.h:607 [inline] driver_create_file+0x48/0x70 drivers/base/driver.c:107 usb_create_newid_files drivers/usb/core/driver.c:192 [inline] usb_register_driver+0x380/0x460 drivers/usb/core/driver.c:1066 do_one_initcall+0x103/0x650 init/main.c:1298 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1353 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1403 free_unref_page_prepare mm/page_alloc.c:3325 [inline] free_unref_page+0x19/0x690 mm/page_alloc.c:3420 mm_free_pgd kernel/fork.c:739 [inline] __mmdrop+0xcb/0x3f0 kernel/fork.c:790 mmdrop include/linux/sched/mm.h:50 [inline] __mmput+0x3f1/0x4b0 kernel/fork.c:1194 mmput+0x56/0x60 kernel/fork.c:1205 free_bprm+0x65/0x2e0 fs/exec.c:1484 kernel_execve+0x3a4/0x490 fs/exec.c:1999 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Memory state around the buggy address: ffff88801f1e0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc ffff88801f1e0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88801f1e0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88801f1e0e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88801f1e0f00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc ==================================================================