From: syzbot <syzbot+de271708674e2093097b@syzkaller.appspotmail.com>
To: allan.newby@bpchargemaster.com, broonie@kernel.org,
catalin.marinas@arm.com, gregkh@linuxfoundation.org,
hdanton@sina.com, kristina.martsenko@arm.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, mark.rutland@arm.com,
mbenes@suse.cz, mcgrof@kernel.org, netdev@vger.kernel.org,
rafael@kernel.org, sunjunyong@xiaomi.com,
syzkaller-bugs@googlegroups.com, will@kernel.org
Subject: Re: [syzbot] KASAN: use-after-free Read in firmware_fallback_sysfs
Date: Sun, 21 Mar 2021 05:02:16 -0700 [thread overview]
Message-ID: <000000000000666eb305be0ab854@google.com> (raw)
In-Reply-To: <000000000000540c0405ba3e9dff@google.com>
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=1637614ed00000
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=17bc70bed00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=148b5fe6d00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+de271708674e2093097b@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 ffff888034b802c8 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:00007f657d03e318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004d5288 RCX: 00000000004499f9
RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000003
RBP: 00000000004d5280 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0031313230386c6e
R13: 00007ffd24e61cff R14: 00007f657d03e400 R15: 0000000000022000
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:
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
__free_fw_priv drivers/base/firmware_loader/main.c:282 [inline]
kref_put include/linux/kref.h:65 [inline]
free_fw_priv+0x2b1/0x4d0 drivers/base/firmware_loader/main.c:289
firmware_free_data drivers/base/firmware_loader/main.c:584 [inline]
release_firmware.part.0+0xc7/0xf0 drivers/base/firmware_loader/main.c:1053
release_firmware drivers/base/firmware_loader/main.c:840 [inline]
_request_firmware+0x709/0xe80 drivers/base/firmware_loader/main.c:839
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
The buggy address belongs to the object at ffff888034b80200
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 200 bytes inside of
256-byte region [ffff888034b80200, ffff888034b80300)
The buggy address belongs to the page:
page:ffffea0000d2e000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34b80
head:ffffea0000d2e000 order:1 compound_mapcount:0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010841b40
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888034b80180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888034b80200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888034b80280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888034b80300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888034b80380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
_______________________________________________
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WARNING: multiple messages have this Message-ID (diff)
From: syzbot <syzbot+de271708674e2093097b@syzkaller.appspotmail.com>
To: allan.newby@bpchargemaster.com, broonie@kernel.org,
catalin.marinas@arm.com, gregkh@linuxfoundation.org,
hdanton@sina.com, kristina.martsenko@arm.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, mark.rutland@arm.com,
mbenes@suse.cz, mcgrof@kernel.org, netdev@vger.kernel.org,
rafael@kernel.org, sunjunyong@xiaomi.com,
syzkaller-bugs@googlegroups.com, will@kernel.org
Subject: Re: [syzbot] KASAN: use-after-free Read in firmware_fallback_sysfs
Date: Sun, 21 Mar 2021 05:02:16 -0700 [thread overview]
Message-ID: <000000000000666eb305be0ab854@google.com> (raw)
In-Reply-To: <000000000000540c0405ba3e9dff@google.com>
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=1637614ed00000
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=17bc70bed00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=148b5fe6d00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+de271708674e2093097b@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 ffff888034b802c8 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:00007f657d03e318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004d5288 RCX: 00000000004499f9
RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000003
RBP: 00000000004d5280 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0031313230386c6e
R13: 00007ffd24e61cff R14: 00007f657d03e400 R15: 0000000000022000
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:
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
__free_fw_priv drivers/base/firmware_loader/main.c:282 [inline]
kref_put include/linux/kref.h:65 [inline]
free_fw_priv+0x2b1/0x4d0 drivers/base/firmware_loader/main.c:289
firmware_free_data drivers/base/firmware_loader/main.c:584 [inline]
release_firmware.part.0+0xc7/0xf0 drivers/base/firmware_loader/main.c:1053
release_firmware drivers/base/firmware_loader/main.c:840 [inline]
_request_firmware+0x709/0xe80 drivers/base/firmware_loader/main.c:839
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
The buggy address belongs to the object at ffff888034b80200
which belongs to the cache kmalloc-256 of size 256
The buggy address is located 200 bytes inside of
256-byte region [ffff888034b80200, ffff888034b80300)
The buggy address belongs to the page:
page:ffffea0000d2e000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x34b80
head:ffffea0000d2e000 order:1 compound_mapcount:0
flags: 0xfff00000010200(slab|head)
raw: 00fff00000010200 dead000000000100 dead000000000122 ffff888010841b40
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888034b80180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888034b80200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888034b80280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888034b80300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888034b80380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
next prev parent reply other threads:[~2021-03-21 12:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-01 4:16 KASAN: use-after-free Read in firmware_fallback_sysfs syzbot
2021-02-01 4:16 ` syzbot
2021-03-12 6:39 ` [syzbot] " syzbot
2021-03-12 6:39 ` syzbot
2021-03-21 12:02 ` syzbot [this message]
2021-03-21 12:02 ` syzbot
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