================================================================== BUG: KASAN: use-after-free in kill_pending_fw_fallback_reqs+0x66/0x290 drivers/base/firmware_loader/fallback.c:116 Read of size 8 at addr ffff88808583c2c0 by task syz-executor.0/2284 CPU: 0 PID: 2284 Comm: syz-executor.0 Not tainted 5.14.0-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:88 [inline] dump_stack_lvl+0x1ae/0x29f lib/dump_stack.c:105 print_address_description+0x66/0x3b0 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report+0x163/0x210 mm/kasan/report.c:436 kill_pending_fw_fallback_reqs+0x66/0x290 drivers/base/firmware_loader/fallback.c:116 fw_pm_notify+0x5d/0xe0 drivers/base/firmware_loader/main.c:1450 notifier_call_chain kernel/notifier.c:83 [inline] notifier_call_chain_robust kernel/notifier.c:118 [inline] blocking_notifier_call_chain_robust+0x13b/0x380 kernel/notifier.c:302 pm_notifier_call_chain_robust+0x27/0x50 kernel/power/main.c:87 snapshot_open+0x18a/0x260 kernel/power/user.c:75 misc_open+0x346/0x3c0 drivers/char/misc.c:141 chrdev_open+0x53b/0x5f0 fs/char_dev.c:414 do_dentry_open+0x7cb/0x1020 fs/open.c:826 do_open fs/namei.c:3374 [inline] path_openat+0x27e7/0x36b0 fs/namei.c:3507 do_filp_open+0x253/0x4d0 fs/namei.c:3534 do_sys_openat2+0x124/0x460 fs/open.c:1204 do_sys_open fs/open.c:1220 [inline] __do_sys_openat fs/open.c:1236 [inline] __se_sys_openat fs/open.c:1231 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1231 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+0x44/0xae RIP: 0033:0x4665e9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f285a8a7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000000000080 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffdf5c504ef R14: 00007f285a8a7300 R15: 0000000000022000 Allocated by task 1930: 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+0xc4/0xf0 mm/kasan/common.c:513 kasan_kmalloc include/linux/kasan.h:264 [inline] kmem_cache_alloc_trace+0x96/0x340 mm/slub.c:2983 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] smk_fetch security/smack/smack_lsm.c:288 [inline] smack_d_instantiate+0x946/0xd00 security/smack/smack_lsm.c:3445 security_d_instantiate+0xa5/0x100 security/security.c:2038 d_instantiate_new+0x61/0x110 fs/dcache.c:2027 ext4_add_nondir+0x22b/0x290 fs/ext4/namei.c:2706 ext4_symlink+0x9ce/0x1000 fs/ext4/namei.c:3535 vfs_symlink+0x396/0x530 fs/namei.c:4182 do_symlinkat+0x251/0x510 fs/namei.c:4212 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+0x44/0xae Freed by task 1930: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x3d/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0x109/0x150 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1625 [inline] slab_free_freelist_hook+0x1d8/0x290 mm/slub.c:1650 slab_free mm/slub.c:3210 [inline] kfree+0xd0/0x1f0 mm/slub.c:4264 smk_fetch security/smack/smack_lsm.c:300 [inline] smack_d_instantiate+0x9da/0xd00 security/smack/smack_lsm.c:3445 security_d_instantiate+0xa5/0x100 security/security.c:2038 d_instantiate_new+0x61/0x110 fs/dcache.c:2027 ext4_add_nondir+0x22b/0x290 fs/ext4/namei.c:2706 ext4_symlink+0x9ce/0x1000 fs/ext4/namei.c:3535 vfs_symlink+0x396/0x530 fs/namei.c:4182 do_symlinkat+0x251/0x510 fs/namei.c:4212 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+0x44/0xae Last potentially related work creation: kasan_save_stack+0x27/0x50 mm/kasan/common.c:38 kasan_record_aux_stack+0xee/0x120 mm/kasan/generic.c:348 __call_rcu kernel/rcu/tree.c:3029 [inline] call_rcu+0x1a0/0xa20 kernel/rcu/tree.c:3109 free_fib_info net/ipv4/fib_semantics.c:256 [inline] fib_create_info+0x69b6/0x7080 net/ipv4/fib_semantics.c:1549 fib_table_insert+0x24c/0x2460 net/ipv4/fib_trie.c:1224 fib_magic+0x447/0x610 net/ipv4/fib_frontend.c:1087 fib_add_ifaddr+0x140/0x580 net/ipv4/fib_frontend.c:1109 fib_netdev_event+0x718/0x860 net/ipv4/fib_frontend.c:1466 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:410 __dev_notify_flags+0x306/0x5d0 net/core/dev.c:2123 dev_change_flags+0xe3/0x190 net/core/dev.c:8898 do_setlink+0xcbd/0x3f70 net/core/rtnetlink.c:2721 __rtnl_newlink net/core/rtnetlink.c:3393 [inline] rtnl_newlink+0x16e4/0x1cd0 net/core/rtnetlink.c:3508 rtnetlink_rcv_msg+0x91c/0xe50 net/core/rtnetlink.c:5574 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x7de/0x9b0 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x9e7/0xe00 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:703 [inline] sock_sendmsg net/socket.c:723 [inline] __sys_sendto+0x541/0x720 net/socket.c:2019 __do_sys_sendto net/socket.c:2031 [inline] __se_sys_sendto net/socket.c:2027 [inline] __x64_sys_sendto+0xda/0xf0 net/socket.c:2027 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+0x44/0xae The buggy address belongs to the object at ffff88808583c200 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 192 bytes inside of 256-byte region [ffff88808583c200, ffff88808583c300) The buggy address belongs to the page: page:ffffea0002160f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8583c head:ffffea0002160f00 order:1 compound_mapcount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffffea0000853d00 0000000600000006 ffff888011041b40 raw: 0000000000000000 0000000000100010 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 8444, ts 262910076390, free_ts 258853787424 prep_new_page mm/page_alloc.c:2436 [inline] get_page_from_freelist+0x779/0xa30 mm/page_alloc.c:4169 __alloc_pages+0x26c/0x5f0 mm/page_alloc.c:5391 alloc_slab_page mm/slub.c:1688 [inline] allocate_slab+0xf1/0x540 mm/slub.c:1828 new_slab mm/slub.c:1891 [inline] new_slab_objects mm/slub.c:2637 [inline] ___slab_alloc+0x1cf/0x350 mm/slub.c:2800 __slab_alloc mm/slub.c:2840 [inline] slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc_trace+0x29d/0x340 mm/slub.c:2981 kmalloc include/linux/slab.h:591 [inline] kzalloc include/linux/slab.h:721 [inline] ____ip_mc_inc_group+0x2fc/0xb30 net/ipv4/igmp.c:1435 __ip_mc_inc_group net/ipv4/igmp.c:1470 [inline] ip_mc_inc_group net/ipv4/igmp.c:1476 [inline] ip_mc_up+0x119/0x2d0 net/ipv4/igmp.c:1775 inetdev_event+0xf3c/0x14d0 net/ipv4/devinet.c:1573 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0xe7/0x170 kernel/notifier.c:410 __dev_notify_flags+0x306/0x5d0 net/core/dev.c:2123 dev_change_flags+0xe3/0x190 net/core/dev.c:8898 do_setlink+0xcbd/0x3f70 net/core/rtnetlink.c:2721 __rtnl_newlink net/core/rtnetlink.c:3393 [inline] rtnl_newlink+0x16e4/0x1cd0 net/core/rtnetlink.c:3508 rtnetlink_rcv_msg+0x91c/0xe50 net/core/rtnetlink.c:5574 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2504 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x7de/0x9b0 net/netlink/af_netlink.c:1340 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1346 [inline] free_pcp_prepare+0xc29/0xd20 mm/page_alloc.c:1397 free_unref_page_prepare mm/page_alloc.c:3332 [inline] free_unref_page+0x7e/0x550 mm/page_alloc.c:3411 kasan_depopulate_vmalloc_pte+0x66/0x80 mm/kasan/shadow.c:375 apply_to_pte_range mm/memory.c:2532 [inline] apply_to_pmd_range mm/memory.c:2576 [inline] apply_to_pud_range mm/memory.c:2612 [inline] apply_to_p4d_range mm/memory.c:2648 [inline] __apply_to_page_range+0x9e4/0xc40 mm/memory.c:2682 kasan_release_vmalloc+0x96/0xb0 mm/kasan/shadow.c:485 __purge_vmap_area_lazy+0xcba/0x18d0 mm/vmalloc.c:1670 _vm_unmap_aliases+0x474/0x500 mm/vmalloc.c:2073 change_page_attr_set_clr+0x2ae/0x680 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0xa4/0xe0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:866 [inline] bpf_int_jit_compile+0xb515/0xbae0 arch/x86/net/bpf_jit_comp.c:2319 bpf_prog_select_runtime+0x65d/0x970 kernel/bpf/core.c:1909 bpf_migrate_filter net/core/filter.c:1294 [inline] bpf_prepare_filter+0x10f5/0x1390 net/core/filter.c:1342 sk_attach_filter+0x1e/0x130 net/core/filter.c:1526 sock_setsockopt+0x18f2/0x32a0 net/core/sock.c:1163 __sys_setsockopt+0x5af/0x980 net/socket.c:2155 __do_sys_setsockopt net/socket.c:2170 [inline] __se_sys_setsockopt net/socket.c:2167 [inline] __x64_sys_setsockopt+0xb1/0xc0 net/socket.c:2167 Memory state around the buggy address: ffff88808583c180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88808583c200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88808583c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88808583c300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88808583c380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================