platform regulatory.0: Direct firmware load for regulatory.db failed with error -2 platform regulatory.0: Falling back to sysfs fallback for: regulatory.db ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x36/0xc0 lib/list_debug.c:23 Read of size 8 at addr ffff8881e4c81f88 by task syz-executor.4/15291 CPU: 1 PID: 15291 Comm: syz-executor.4 Not tainted 5.4.125-syzkaller-00028-g73e6d86c30ee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d8/0x24e lib/dump_stack.c:118 print_address_description+0x9b/0x650 mm/kasan/report.c:384 __kasan_report+0x182/0x260 mm/kasan/report.c:516 kasan_report+0x30/0x60 mm/kasan/common.c:653 __list_add_valid+0x36/0xc0 lib/list_debug.c:23 __list_add include/linux/list.h:60 [inline] list_add include/linux/list.h:79 [inline] fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:515 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:580 [inline] firmware_fallback_sysfs+0x480/0xb20 drivers/base/firmware_loader/fallback.c:654 _request_firmware+0x1287/0x1770 drivers/base/firmware_loader/main.c:788 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:831 reg_reload_regdb+0xa0/0x220 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xed8/0x13b0 net/netlink/genetlink.c:654 netlink_rcv_skb+0x200/0x480 net/netlink/af_netlink.c:2478 genl_rcv+0x24/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x865/0x9f0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9ab/0xd40 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x583/0x8c0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2c4/0x3b0 net/socket.c:2398 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f8242116a39 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:00007f823fe8d188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8242219f60 RCX: 00007f8242116a39 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007f8242170c5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff5b266d4f R14: 00007f823fe8d300 R15: 0000000000022000 Allocated by task 156: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] __kasan_kmalloc+0x137/0x1e0 mm/kasan/common.c:529 kmem_cache_alloc_trace+0x139/0x2b0 mm/slub.c:2848 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [inline] kernfs_fop_open+0x321/0xad0 fs/kernfs/file.c:647 do_dentry_open+0x949/0x1100 fs/open.c:796 do_last fs/namei.c:3495 [inline] path_openat+0x1127/0x3da0 fs/namei.c:3612 do_filp_open+0x208/0x450 fs/namei.c:3642 do_sys_open+0x383/0x7c0 fs/open.c:1113 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 156: save_stack mm/kasan/common.c:70 [inline] set_track mm/kasan/common.c:78 [inline] kasan_set_free_info mm/kasan/common.c:345 [inline] __kasan_slab_free+0x18a/0x240 mm/kasan/common.c:487 slab_free_hook mm/slub.c:1454 [inline] slab_free_freelist_hook+0x7b/0x150 mm/slub.c:1492 slab_free mm/slub.c:3072 [inline] kfree+0xe0/0x660 mm/slub.c:4061 kernfs_fop_release+0x1d2/0x240 fs/kernfs/file.c:782 __fput+0x27d/0x6c0 fs/file_table.c:281 task_work_run+0x186/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff8881e4c81f00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 136 bytes inside of 192-byte region [ffff8881e4c81f00, ffff8881e4c81fc0) The buggy address belongs to the page: page:ffffea0007932040 refcount:1 mapcount:0 mapping:ffff8881f5c02a00 index:0x0 flags: 0x8000000000000200(slab) raw: 8000000000000200 dead000000000100 dead000000000122 ffff8881f5c02a00 raw: 0000000000000000 0000000000100010 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) set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook mm/page_alloc.c:2165 [inline] prep_new_page+0x19a/0x380 mm/page_alloc.c:2171 get_page_from_freelist+0x550/0x8b0 mm/page_alloc.c:3794 __alloc_pages_nodemask+0x3a2/0x880 mm/page_alloc.c:4855 alloc_slab_page+0x39/0x3e0 mm/slub.c:342 allocate_slab mm/slub.c:1675 [inline] new_slab+0x97/0x460 mm/slub.c:1741 new_slab_objects mm/slub.c:2498 [inline] ___slab_alloc+0x330/0x4c0 mm/slub.c:2659 __slab_alloc mm/slub.c:2699 [inline] slab_alloc_node mm/slub.c:2784 [inline] slab_alloc mm/slub.c:2829 [inline] kmem_cache_alloc_trace+0x199/0x2b0 mm/slub.c:2846 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:690 [inline] kernfs_fop_open+0x321/0xad0 fs/kernfs/file.c:647 do_dentry_open+0x949/0x1100 fs/open.c:796 do_last fs/namei.c:3495 [inline] path_openat+0x1127/0x3da0 fs/namei.c:3612 do_filp_open+0x208/0x450 fs/namei.c:3642 do_sys_open+0x383/0x7c0 fs/open.c:1113 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 page_owner free stack trace missing Memory state around the buggy address: ffff8881e4c81e80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8881e4c81f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8881e4c81f80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ^ ffff8881e4c82000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8881e4c82080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== list_add corruption. next->prev should be prev (ffffffff861080a0), but was 0000000000000000. (next=ffff8881e4c81f80). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:25! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 15291 Comm: syz-executor.4 Tainted: G B 5.4.125-syzkaller-00028-g73e6d86c30ee #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__list_add_valid+0xa0/0xc0 lib/list_debug.c:23 Code: a0 91 03 85 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 42 7a 21 ff 0f 0b 48 c7 c7 60 90 03 85 4c 89 e6 4c 89 f1 31 c0 e8 2c 7a 21 ff <0f> 0b 48 c7 c7 20 91 03 85 4c 89 f6 4c 89 e1 31 c0 e8 16 7a 21 ff RSP: 0018:ffff8881e80c72c8 EFLAGS: 00010246 RAX: 0000000000000075 RBX: ffff8881e4c81f88 RCX: 7bb02b019caf0500 RDX: ffffc90001950000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff8881e4c81f80 R08: ffffffff814e90e7 R09: ffffed103ede9608 R10: ffffed103ede9608 R11: 0000000000000000 R12: ffffffff861080a0 R13: dffffc0000000000 R14: ffff8881e4c81f80 R15: ffff8881ebcc6180 FS: 00007f823fe8d700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa22f549058 CR3: 00000001e8e6a000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_add include/linux/list.h:60 [inline] list_add include/linux/list.h:79 [inline] fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:515 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:580 [inline] firmware_fallback_sysfs+0x480/0xb20 drivers/base/firmware_loader/fallback.c:654 _request_firmware+0x1287/0x1770 drivers/base/firmware_loader/main.c:788 request_firmware+0x33/0x50 drivers/base/firmware_loader/main.c:831 reg_reload_regdb+0xa0/0x220 net/wireless/reg.c:1083 genl_family_rcv_msg net/netlink/genetlink.c:629 [inline] genl_rcv_msg+0xed8/0x13b0 net/netlink/genetlink.c:654 netlink_rcv_skb+0x200/0x480 net/netlink/af_netlink.c:2478 genl_rcv+0x24/0x40 net/netlink/genetlink.c:665 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline] netlink_unicast+0x865/0x9f0 net/netlink/af_netlink.c:1329 netlink_sendmsg+0x9ab/0xd40 net/netlink/af_netlink.c:1918 sock_sendmsg_nosec net/socket.c:638 [inline] sock_sendmsg net/socket.c:658 [inline] ____sys_sendmsg+0x583/0x8c0 net/socket.c:2298 ___sys_sendmsg net/socket.c:2352 [inline] __sys_sendmsg+0x2c4/0x3b0 net/socket.c:2398 do_syscall_64+0xcb/0x1e0 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f8242116a39 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:00007f823fe8d188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8242219f60 RCX: 00007f8242116a39 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007f8242170c5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff5b266d4f R14: 00007f823fe8d300 R15: 0000000000022000 Modules linked in: ---[ end trace a1018380ffe92335 ]--- RIP: 0010:__list_add_valid+0xa0/0xc0 lib/list_debug.c:23 Code: a0 91 03 85 4c 89 fe 4c 89 e2 4c 89 f1 31 c0 e8 42 7a 21 ff 0f 0b 48 c7 c7 60 90 03 85 4c 89 e6 4c 89 f1 31 c0 e8 2c 7a 21 ff <0f> 0b 48 c7 c7 20 91 03 85 4c 89 f6 4c 89 e1 31 c0 e8 16 7a 21 ff RSP: 0018:ffff8881e80c72c8 EFLAGS: 00010246 RAX: 0000000000000075 RBX: ffff8881e4c81f88 RCX: 7bb02b019caf0500 RDX: ffffc90001950000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffff8881e4c81f80 R08: ffffffff814e90e7 R09: ffffed103ede9608 R10: ffffed103ede9608 R11: 0000000000000000 R12: ffffffff861080a0 R13: dffffc0000000000 R14: ffff8881e4c81f80 R15: ffff8881ebcc6180 FS: 00007f823fe8d700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa22f549058 CR3: 00000001e8e6a000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400