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Date: Sun, 6 Nov 2022 22:09:42 +0800
From: Wei Chen <harperchen1110@...il.com>
To: clm@...com, josef@...icpanda.com, dsterba@...e.com,
linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org
Subject: WARNING in btrfs_quota_enable
Dear Linux Developer,
Recently when using our tool to fuzz kernel, the following crash was
triggered. The bug persists in Linux 6.0.
HEAD commit: 4f5365f77018 Linux 5.15.76
git tree: stable
compiler: gcc 7.5.0
console output:
https://drive.google.com/file/d/1jbEJTcn-e-hkrpVGYqA0168AEYHGMFYR/view?usp=share_link
kernel config: https://drive.google.com/file/d/1flhc33savDkmYN6PRU5C2vXDX0LAKMvM/view?usp=share_link
C reproducer: https://drive.google.com/file/d/1VKO-bIWJcfkq1U5R_-YjwAz6uytPCUsw/view?usp=share_link
Syz reproducer:
https://drive.google.com/file/d/1C3DveQax7PoJ4rJ67tHddVYUbWSvTm7m/view?usp=share_link
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: Wei Chen <harperchen1110@...il.com>
[ 196.112397][ T8633] WARNING: CPU: 0 PID: 8633 at
fs/btrfs/qgroup.c:1026 btrfs_quota_enable+0x1bfb/0x2320
[ 196.116525][ T8633] Modules linked in:
[ 196.118128][ T8633] CPU: 0 PID: 8633 Comm: a.out Not tainted 6.0.0 #38
[ 196.118608][ T8633] Hardware name: QEMU Standard PC (i440FX + PIIX,
1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
[ 196.121470][ T8633] RIP: 0010:btrfs_quota_enable+0x1bfb/0x2320
[ 196.121899][ T8633] Code: e7 8a 48 8b 54 24 20 31 c0 e8 06 78 9a 06
4c 8b 7c 24 58 eb 17 e8 e5 5c f8 fd 48 c7 c7 e0 3d e7 8a 89 de 31 c0
e8 65 d7 c1 fd <0f> 0b 48 8b 7c 24 18 48 c7 c6 80 3e e7 8a ba 02 04 00
00 4c 8b 74
[ 196.127785][ T8633] RSP: 0018:ffffc9000b00f620 EFLAGS: 00010246
[ 196.128190][ T8633] RAX: e82232a3d1ff4300 RBX: fffffffffffffff4
RCX: ffff88801bf5a440
[ 196.128710][ T8633] RDX: 0000000000000000 RSI: 0000000080000000
RDI: 0000000000000000
[ 196.132528][ T8633] RBP: ffffc9000b00f830 R08: ffffffff816b75fc
R09: ffffed100c784f14
[ 196.133074][ T8633] R10: ffffed100c784f14 R11: 0000000000000000
R12: ffff88802c5457d8
[ 196.135472][ T8633] R13: ffff88802ca17980 R14: 1ffff11005942f30
R15: 1ffff92001601edc
[ 196.138552][ T8633] FS: 00007fda5da0b700(0000)
GS:ffff888063c00000(0000) knlGS:0000000000000000
[ 196.139137][ T8633] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 196.141095][ T8633] CR2: 00007f84f55d0000 CR3: 000000002b93c000
CR4: 0000000000750ef0
[ 196.141614][ T8633] DR0: 0000000000000000 DR1: 0000000000000000
DR2: 0000000000000000
[ 196.143261][ T8633] DR3: 0000000000000000 DR6: 00000000fffe0ff0
DR7: 0000000000000400
[ 196.143797][ T8633] PKRU: 55555554
[ 196.144035][ T8633] Call Trace:
[ 196.144262][ T8633] <TASK>
[ 196.144751][ T8633] ? read_lock_is_recursive+0x10/0x10
[ 196.145152][ T8633] ? __del_qgroup_rb+0x600/0x600
[ 196.145487][ T8633] ? __might_fault+0xb6/0x110
[ 196.149333][ T8633] ? rcu_read_lock_sched_held+0x87/0x110
[ 196.149729][ T8633] ? __lock_acquire+0x6080/0x6080
[ 196.150066][ T8633] ? rcu_read_lock_any_held+0xb1/0x130
[ 196.151589][ T8633] ? down_write+0x10d/0x170
[ 196.151890][ T8633] ? down_read_killable+0x80/0x80
[ 196.152226][ T8633] ? __might_fault+0xb2/0x110
[ 196.152544][ T8633] ? _copy_from_user+0x106/0x160
[ 196.155487][ T8633] btrfs_ioctl+0x6077/0x9db0
[ 196.155798][ T8633] ? kfree+0xda/0x350
[ 196.156075][ T8633] ? kasan_set_track+0x4f/0x60
[ 196.156399][ T8633] ? kasan_set_track+0x3d/0x60
[ 196.160352][ T8633] ? kasan_set_free_info+0x1f/0x40
[ 196.160740][ T8633] ? ____kasan_slab_free+0xd8/0x120
[ 196.161087][ T8633] ? slab_free_freelist_hook+0x12e/0x1a0
[ 196.162586][ T8633] ? kfree+0xda/0x350
[ 196.162918][ T8633] ? tomoyo_path_number_perm+0x5be/0x790
[ 196.163296][ T8633] ? security_file_ioctl+0x55/0xb0
[ 196.164763][ T8633] ? __se_sys_ioctl+0x48/0x170
[ 196.165093][ T8633] ? do_syscall_64+0x3d/0x90
[ 196.165402][ T8633] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 196.169938][ T8633] ? btrfs_ioctl_get_supported_features+0x40/0x40
[ 196.170398][ T8633] ? lockdep_hardirqs_on_prepare+0x428/0x790
[ 196.170806][ T8633] ? rcu_read_lock_sched_held+0x87/0x110
[ 196.172301][ T8633] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 196.172722][ T8633] ? lockdep_hardirqs_on_prepare+0x428/0x790
[ 196.173125][ T8633] ? do_vfs_ioctl+0xc35/0x29e0
[ 196.174572][ T8633] ? __ia32_compat_sys_ioctl+0xb90/0xb90
[ 196.174965][ T8633] ? __lock_acquire+0x6080/0x6080
[ 196.175301][ T8633] ? slab_free_freelist_hook+0x12e/0x1a0
[ 196.178710][ T8633] ? tomoyo_path_number_perm+0x5be/0x790
[ 196.179122][ T8633] ? kfree+0xda/0x350
[ 196.179392][ T8633] ? tomoyo_path_number_perm+0x627/0x790
[ 196.180886][ T8633] ? tomoyo_check_path_acl+0x1c0/0x1c0
[ 196.181263][ T8633] ? rcu_read_lock_sched_held+0x87/0x110
[ 196.181647][ T8633] ? lockdep_hardirqs_on_prepare+0x428/0x790
[ 196.183052][ T8633] ? print_irqtrace_events+0x220/0x220
[ 196.184574][ T8633] ? vtime_user_exit+0x2b2/0x3e0
[ 196.184916][ T8633] ? __ct_user_exit+0xd9/0x160
[ 196.185239][ T8633] ? bpf_lsm_file_ioctl+0x5/0x10
[ 196.185570][ T8633] ? security_file_ioctl+0x9d/0xb0
[ 196.190343][ T8633] ? btrfs_ioctl_get_supported_features+0x40/0x40
[ 196.190782][ T8633] __se_sys_ioctl+0xfb/0x170
[ 196.191099][ T8633] do_syscall_64+0x3d/0x90
[ 196.192509][ T8633] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 196.192904][ T8633] RIP: 0033:0x7fda5cee4469
[ 196.193209][ T8633] Code: 00 f3 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 8b 0d ff 49 2b 00 f7 d8
64 89 01 48
[ 196.195738][ T8633] RSP: 002b:00007ffd27fd1dc8 EFLAGS: 00000206
ORIG_RAX: 0000000000000010
[ 196.196277][ T8633] RAX: ffffffffffffffda RBX: 0000000000000000
RCX: 00007fda5cee4469
[ 196.198914][ T8633] RDX: 0000000020000180 RSI: 00000000c0109428
RDI: 0000000000000006
[ 196.199425][ T8633] RBP: 00007ffd27fd1de0 R08: 0000000000000002
R09: 00007ffd27fd1de0
[ 196.199985][ T8633] R10: 0000000000000001 R11: 0000000000000206
R12: 0000559da6401170
[ 196.200504][ T8633] R13: 00007ffd27fd1f20 R14: 0000000000000000
R15: 0000000000000000
[ 196.201068][ T8633] </TASK>
[ 196.201291][ T8633] Kernel panic - not syncing: panic_on_warn set ...
[ 196.201722][ T8633] CPU: 0 PID: 8633 Comm: a.out Not tainted 6.0.0 #38
[ 196.202159][ T8633] Hardware name: QEMU Standard PC (i440FX + PIIX,
1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014
[ 196.202813][ T8633] Call Trace:
[ 196.203044][ T8633] <TASK>
[ 196.203240][ T8633] dump_stack_lvl+0x1b1/0x28e
[ 196.203550][ T8633] ? io_alloc_page_table+0xfe/0xfe
[ 196.203882][ T8633] ? panic+0x81b/0x81b
[ 196.204153][ T8633] ? btrfs_quota_enable+0x1bb0/0x2320
[ 196.204501][ T8633] panic+0x2c2/0x81b
[ 196.204762][ T8633] ? __warn+0x131/0x220
[ 196.205036][ T8633] ? asan.module_ctor+0x4/0x4
[ 196.205350][ T8633] ? btrfs_quota_enable+0x1bfb/0x2320
[ 196.205780][ T8633] __warn+0x1fc/0x220
[ 196.206137][ T8633] ? btrfs_quota_enable+0x1bfb/0x2320
[ 196.206610][ T8633] report_bug+0x1b3/0x2d0
[ 196.207013][ T8633] handle_bug+0x3d/0x70
[ 196.207384][ T8633] exc_invalid_op+0x16/0x40
[ 196.207782][ T8633] asm_exc_invalid_op+0x16/0x20
[ 196.208214][ T8633] RIP: 0010:btrfs_quota_enable+0x1bfb/0x2320
[ 196.208727][ T8633] Code: e7 8a 48 8b 54 24 20 31 c0 e8 06 78 9a 06
4c 8b 7c 24 58 eb 17 e8 e5 5c f8 fd 48 c7 c7 e0 3d e7 8a 89 de 31 c0
e8 65 d7 c1 fd <0f> 0b 48 8b 7c 24 18 48 c7 c6 80 3e e7 8a ba 02 04 00
00 4c 8b 74
[ 196.210340][ T8633] RSP: 0018:ffffc9000b00f620 EFLAGS: 00010246
[ 196.210874][ T8633] RAX: e82232a3d1ff4300 RBX: fffffffffffffff4
RCX: ffff88801bf5a440
[ 196.211550][ T8633] RDX: 0000000000000000 RSI: 0000000080000000
RDI: 0000000000000000
[ 196.212225][ T8633] RBP: ffffc9000b00f830 R08: ffffffff816b75fc
R09: ffffed100c784f14
[ 196.212906][ T8633] R10: ffffed100c784f14 R11: 0000000000000000
R12: ffff88802c5457d8
[ 196.213582][ T8633] R13: ffff88802ca17980 R14: 1ffff11005942f30
R15: 1ffff92001601edc
[ 196.214167][ T8633] ? __wake_up_klogd+0xcc/0x100
[ 196.214491][ T8633] ? read_lock_is_recursive+0x10/0x10
[ 196.214843][ T8633] ? __del_qgroup_rb+0x600/0x600
[ 196.215181][ T8633] ? __might_fault+0xb6/0x110
[ 196.215484][ T8633] ? rcu_read_lock_sched_held+0x87/0x110
[ 196.215847][ T8633] ? __lock_acquire+0x6080/0x6080
[ 196.216180][ T8633] ? rcu_read_lock_any_held+0xb1/0x130
[ 196.216533][ T8633] ? down_write+0x10d/0x170
[ 196.216831][ T8633] ? down_read_killable+0x80/0x80
[ 196.217155][ T8633] ? __might_fault+0xb2/0x110
[ 196.217462][ T8633] ? _copy_from_user+0x106/0x160
[ 196.217783][ T8633] btrfs_ioctl+0x6077/0x9db0
[ 196.218117][ T8633] ? kfree+0xda/0x350
[ 196.218489][ T8633] ? kasan_set_track+0x4f/0x60
[ 196.218827][ T8633] ? kasan_set_track+0x3d/0x60
[ 196.219127][ T8633] ? kasan_set_free_info+0x1f/0x40
[ 196.219446][ T8633] ? ____kasan_slab_free+0xd8/0x120
[ 196.219830][ T8633] ? slab_free_freelist_hook+0x12e/0x1a0
[ 196.220258][ T8633] ? kfree+0xda/0x350
[ 196.220585][ T8633] ? tomoyo_path_number_perm+0x5be/0x790
[ 196.220934][ T8633] ? security_file_ioctl+0x55/0xb0
[ 196.221251][ T8633] ? __se_sys_ioctl+0x48/0x170
[ 196.221548][ T8633] ? do_syscall_64+0x3d/0x90
[ 196.221835][ T8633] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 196.222224][ T8633] ? btrfs_ioctl_get_supported_features+0x40/0x40
[ 196.222619][ T8633] ? lockdep_hardirqs_on_prepare+0x428/0x790
[ 196.223004][ T8633] ? rcu_read_lock_sched_held+0x87/0x110
[ 196.223353][ T8633] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 196.223724][ T8633] ? lockdep_hardirqs_on_prepare+0x428/0x790
[ 196.224099][ T8633] ? do_vfs_ioctl+0xc35/0x29e0
[ 196.224395][ T8633] ? __ia32_compat_sys_ioctl+0xb90/0xb90
[ 196.224746][ T8633] ? __lock_acquire+0x6080/0x6080
[ 196.225060][ T8633] ? slab_free_freelist_hook+0x12e/0x1a0
[ 196.225406][ T8633] ? tomoyo_path_number_perm+0x5be/0x790
[ 196.225752][ T8633] ? kfree+0xda/0x350
[ 196.226002][ T8633] ? tomoyo_path_number_perm+0x627/0x790
[ 196.226352][ T8633] ? tomoyo_check_path_acl+0x1c0/0x1c0
[ 196.226690][ T8633] ? rcu_read_lock_sched_held+0x87/0x110
[ 196.227067][ T8633] ? lockdep_hardirqs_on_prepare+0x428/0x790
[ 196.227438][ T8633] ? print_irqtrace_events+0x220/0x220
[ 196.227775][ T8633] ? vtime_user_exit+0x2b2/0x3e0
[ 196.228084][ T8633] ? __ct_user_exit+0xd9/0x160
[ 196.228385][ T8633] ? bpf_lsm_file_ioctl+0x5/0x10
[ 196.228700][ T8633] ? security_file_ioctl+0x9d/0xb0
[ 196.229011][ T8633] ? btrfs_ioctl_get_supported_features+0x40/0x40
[ 196.229395][ T8633] __se_sys_ioctl+0xfb/0x170
[ 196.229693][ T8633] do_syscall_64+0x3d/0x90
[ 196.229970][ T8633] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 196.230326][ T8633] RIP: 0033:0x7fda5cee4469
[ 196.230609][ T8633] Code: 00 f3 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 8b 0d ff 49 2b 00 f7 d8
64 89 01 48
[ 196.231750][ T8633] RSP: 002b:00007ffd27fd1dc8 EFLAGS: 00000206
ORIG_RAX: 0000000000000010
[ 196.232248][ T8633] RAX: ffffffffffffffda RBX: 0000000000000000
RCX: 00007fda5cee4469
[ 196.232721][ T8633] RDX: 0000000020000180 RSI: 00000000c0109428
RDI: 0000000000000006
[ 196.233189][ T8633] RBP: 00007ffd27fd1de0 R08: 0000000000000002
R09: 00007ffd27fd1de0
[ 196.233654][ T8633] R10: 0000000000000001 R11: 0000000000000206
R12: 0000559da6401170
[ 196.234124][ T8633] R13: 00007ffd27fd1f20 R14: 0000000000000000
R15: 0000000000000000
[ 196.234601][ T8633] </TASK>
[ 196.235107][ T8633] Kernel Offset: disabled
[ 196.235468][ T8633] Rebooting in 86400 seconds..
Best,
Wei
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