Re: [syzbot] KASAN: use-after-free Read in firmware_fallback_sysfs
syzbot has found a reproducer for the following issue on: HEAD commit:a1e6f641 Revert "net: dsa: sja1105: Clear VLAN filtering o.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=1637614ed0 kernel config: https://syzkaller.appspot.com/x/.config?x=c2371621441fef8b dashboard link: https://syzkaller.appspot.com/bug?extid=de271708674e2093097b syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17bc70bed0 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=148b5fe6d0 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+de271708674e20930...@syzkaller.appspotmail.com platform regulatory.0: Falling back to sysfs fallback for: regulatory.db == BUG: KASAN: use-after-free in __list_add_valid+0x81/0xa0 lib/list_debug.c:23 Read of size 8 at addr 888034b802c8 by task syz-executor067/9770 CPU: 0 PID: 9770 Comm: syz-executor067 Not tainted 5.12.0-rc2-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 __list_add_valid+0x81/0xa0 lib/list_debug.c:23 __list_add include/linux/list.h:67 [inline] list_add include/linux/list.h:86 [inline] fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:516 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:581 [inline] firmware_fallback_sysfs+0x455/0xe20 drivers/base/firmware_loader/fallback.c:657 _request_firmware+0xa80/0xe80 drivers/base/firmware_loader/main.c:831 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:875 reg_reload_regdb+0x7a/0x240 net/wireless/reg.c:1095 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4499f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 16 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:7f657d03e318 EFLAGS: 0246 ORIG_RAX: 002e RAX: ffda RBX: 004d5288 RCX: 004499f9 RDX: RSI: 23c0 RDI: 0003 RBP: 004d5280 R08: R09: R10: R11: 0246 R12: 0031313230386c6e R13: 7ffd24e61cff R14: 7f657d03e400 R15: 00022000 Allocated by task 9764: 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:554 [inline] kzalloc include/linux/slab.h:684 [inline] __allocate_fw_priv drivers/base/firmware_loader/main.c:186 [inline] alloc_lookup_fw_priv drivers/base/firmware_loader/main.c:250 [inline] _request_firmware_prepare drivers/base/firmware_loader/main.c:744 [inline] _request_firmware+0x2de/0xe80 drivers/base/firmware_loader/main.c:806 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:875 reg_reload_regdb+0x7a/0x240 net/wireless/reg.c:1095 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 9764:
Re: [syzbot] KASAN: use-after-free Read in firmware_fallback_sysfs
syzbot has found a reproducer for the following issue on: HEAD commit:47142ed6 net: dsa: bcm_sf2: Qualify phydev->dev_flags base.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=11ccd12ad0 kernel config: https://syzkaller.appspot.com/x/.config?x=eec733599e95cd87 dashboard link: https://syzkaller.appspot.com/bug?extid=de271708674e2093097b syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15437d56d0 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+de271708674e20930...@syzkaller.appspotmail.com 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+0x81/0xa0 lib/list_debug.c:23 Read of size 8 at addr 888028830ac8 by task syz-executor.4/9852 CPU: 0 PID: 9852 Comm: syz-executor.4 Not tainted 5.12.0-rc2-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 __list_add_valid+0x81/0xa0 lib/list_debug.c:23 __list_add include/linux/list.h:67 [inline] list_add include/linux/list.h:86 [inline] fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:516 [inline] fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:581 [inline] firmware_fallback_sysfs+0x455/0xe20 drivers/base/firmware_loader/fallback.c:657 _request_firmware+0xa80/0xe80 drivers/base/firmware_loader/main.c:831 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:875 reg_reload_regdb+0x7a/0x240 net/wireless/reg.c:1095 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465f69 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:7f6d26af9188 EFLAGS: 0246 ORIG_RAX: 002e RAX: ffda RBX: 0056bf60 RCX: 00465f69 RDX: RSI: 2240 RDI: 0003 RBP: 004bfa8f R08: R09: R10: R11: 0246 R12: 0056bf60 R13: 7ffdd4adb6bf R14: 7f6d26af9300 R15: 00022000 Allocated by task 9835: 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:554 [inline] kzalloc include/linux/slab.h:684 [inline] __allocate_fw_priv drivers/base/firmware_loader/main.c:186 [inline] alloc_lookup_fw_priv drivers/base/firmware_loader/main.c:250 [inline] _request_firmware_prepare drivers/base/firmware_loader/main.c:744 [inline] _request_firmware+0x2de/0xe80 drivers/base/firmware_loader/main.c:806 request_firmware+0x32/0x50 drivers/base/firmware_loader/main.c:875 reg_reload_regdb+0x7a/0x240 net/wireless/reg.c:1095 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2502 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 sys_sendmsg+0x6e8/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae Freed by task 9835:
