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* fuzz testing a 32 bit x86 user mode linux guest brought a BUG in
@ 2014-08-14 21:56 Toralf Förster
  2014-08-25  4:12 ` Liu Bo
  0 siblings, 1 reply; 5+ messages in thread
From: Toralf Förster @ 2014-08-14 21:56 UTC (permalink / raw)
  To: linux-btrfs


Hello,

a recent kernel brought up this while using trinity inside a x86 UML (stable Gentoo Linux):


Aug 14 22:07:06 trinity kernel: ------------[ cut here ]------------
Aug 14 22:07:06 trinity kernel: WARNING: CPU: 0 PID: 5860 at fs/btrfs/extent_io.c:430 insert_state+0x69/0x170()
Aug 14 22:07:06 trinity kernel: BTRFS: end < start 4094 18446744073709551615
Aug 14 22:07:06 trinity kernel: CPU: 0 PID: 5860 Comm: trinity-c1 Tainted: G    B          3.16.0-11149-gba36899-dirty #7
Aug 14 22:07:06 trinity kernel: Stack:
Aug 14 22:07:06 trinity kernel: 085bfd28 085bfd28 00000003 086f0547 0d2e0000 0d2e7cec 085da26e 0d2e7ca4
Aug 14 22:07:06 trinity kernel: 08501e1f 00000000 0d2e7c78 0d2e7cdc 0807cb95 085ed604 0d2e7d08 000016e4
Aug 14 22:07:06 trinity kernel: 085da26e 000001ae 082c9109 000001ae 082c9109 00000000 00000000 0d2e7d88
Aug 14 22:07:06 trinity kernel: Call Trace:
Aug 14 22:07:06 trinity kernel: [<08501e1f>] dump_stack+0x26/0x28
Aug 14 22:07:06 trinity kernel: [<0807cb95>] warn_slowpath_common+0x75/0xa0
Aug 14 22:07:06 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
Aug 14 22:07:06 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
Aug 14 22:07:06 trinity kernel: [<0807cc0e>] warn_slowpath_fmt+0x2e/0x30
Aug 14 22:07:06 trinity kernel: [<082c9109>] insert_state+0x69/0x170
Aug 14 22:07:06 trinity kernel: [<082c9527>] __set_extent_bit+0x177/0x730
Aug 14 22:07:06 trinity kernel: [<08078a0c>] ? do_set_thread_area+0x1c/0x50
Aug 14 22:07:06 trinity kernel: [<082cab09>] lock_extent_bits+0x59/0x230
Aug 14 22:07:06 trinity kernel: [<080975ac>] ? finish_task_switch.constprop.53+0x3c/0x90
Aug 14 22:07:06 trinity kernel: [<08504fc2>] ? mutex_lock+0x12/0x30
Aug 14 22:07:06 trinity kernel: [<082bcea5>] btrfs_file_llseek+0x1a5/0x440
Aug 14 22:07:06 trinity kernel: [<08504f9d>] ? __mutex_lock_slowpath+0x28d/0x2a0
Aug 14 22:07:06 trinity kernel: [<0810d1bf>] vfs_llseek+0x3f/0x50
Aug 14 22:07:06 trinity kernel: [<0810d217>] SyS_lseek+0x47/0xb0
Aug 14 22:07:06 trinity kernel: [<080629e0>] handle_syscall+0x60/0x80
Aug 14 22:07:06 trinity kernel: [<084c04cc>] ? ptrace+0x2c/0x70
Aug 14 22:07:06 trinity kernel: [<080794a2>] ? get_fp_registers+0x22/0x40
Aug 14 22:07:06 trinity kernel: [<080745ac>] userspace+0x46c/0x5e0
Aug 14 22:07:06 trinity kernel: [<080799f6>] ? os_set_thread_area+0x26/0x40
Aug 14 22:07:06 trinity kernel: [<08078a0c>] ? do_set_thread_area+0x1c/0x50
Aug 14 22:07:06 trinity kernel: [<08078b88>] ? arch_switch_tls+0xb8/0x100
Aug 14 22:07:06 trinity kernel: [<0805f720>] fork_handler+0x60/0x70
Aug 14 22:07:06 trinity kernel:
Aug 14 22:07:06 trinity kernel: ---[ end trace 77e962ef58783178 ]---
Aug 14 22:07:06 trinity trinity: Detected kernel tainting. Last seed was 1274643378
Aug 14 23:28:04 trinity kernel: 08501e1f 00000000 859afb64 859afbc8 0807cb95 085ed604 859afbf4 000015fd
Aug 14 23:28:04 trinity kernel: 085da26e 000001ae 082c9109 000001ae 082c9109 8640e500 00000000 859afc74
Aug 14 23:28:04 trinity kernel: Call Trace:
Aug 14 23:28:04 trinity kernel: [<08501e1f>] dump_stack+0x26/0x28
Aug 14 23:28:04 trinity kernel: [<0807cb95>] warn_slowpath_common+0x75/0xa0
Aug 14 23:28:04 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
Aug 14 23:28:04 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
Aug 14 23:28:04 trinity kernel: [<0807cc0e>] warn_slowpath_fmt+0x2e/0x30
Aug 14 23:28:04 trinity kernel: [<082c9109>] insert_state+0x69/0x170
Aug 14 23:28:04 trinity kernel: [<082c9527>] __set_extent_bit+0x177/0x730
Aug 14 23:28:04 trinity kernel: [<082cab09>] lock_extent_bits+0x59/0x230
Aug 14 23:28:04 trinity kernel: [<082b593d>] btrfs_evict_inode+0x14d/0x5a0
Aug 14 23:28:04 trinity kernel: [<08125ffd>] evict+0xdd/0x1b0
Aug 14 23:28:04 trinity kernel: [<08506281>] ? _raw_spin_lock+0x11/0x20
Aug 14 23:28:04 trinity kernel: [<08126c7d>] iput+0x16d/0x180
Aug 14 23:28:04 trinity kernel: [<08122888>] __dentry_kill+0x138/0x200
Aug 14 23:28:04 trinity kernel: [<081230a6>] dput+0x156/0x180
Aug 14 23:28:04 trinity kernel: [<0810ed45>] __fput+0x175/0x190
Aug 14 23:28:04 trinity kernel: [<0810eb90>] ? file_free_rcu+0x0/0x40
Aug 14 23:28:04 trinity kernel: [<0810ed9b>] ____fput+0xb/0x10
Aug 14 23:28:04 trinity kernel: [<08092756>] task_work_run+0x76/0x90
Aug 14 23:28:04 trinity kernel: [<0807e8dd>] do_exit+0x32d/0x940
Aug 14 23:28:04 trinity kernel: [<0807efd2>] do_group_exit+0xa2/0xf0
Aug 14 23:28:04 trinity kernel: [<0807f037>] SyS_exit_group+0x17/0x20
Aug 14 23:28:04 trinity kernel: [<080629e0>] handle_syscall+0x60/0x80
Aug 14 23:28:04 trinity kernel: [<080e4290>] ? shmem_setattr+0xc0/0x2d0
Aug 14 23:28:04 trinity kernel: [<084c04cc>] ? ptrace+0x2c/0x70
Aug 14 23:28:04 trinity kernel: [<080794a2>] ? get_fp_registers+0x22/0x40
Aug 14 23:28:04 trinity kernel: [<080745ac>] userspace+0x46c/0x5e0
Aug 14 23:28:04 trinity kernel: [<080799f6>] ? os_set_thread_area+0x26/0x40
Aug 14 23:28:04 trinity kernel: [<08078a0c>] ? do_set_thread_area+0x1c/0x50
Aug 14 23:28:04 trinity kernel: [<08078b88>] ? arch_switch_tls+0xb8/0x100
Aug 14 23:28:04 trinity kernel: [<0805f720>] fork_handler+0x60/0x70
Aug 14 23:28:04 trinity kernel:
Aug 14 23:28:04 trinity kernel: ---[ end trace 77e962ef5942c6fc ]---
Aug 14 23:28:04 trinity kernel: ------------[ cut here ]------------
Aug 14 23:28:04 trinity kernel: WARNING: CPU: 0 PID: 5629 at fs/btrfs/extent_io.c:430 insert_state+0x69/0x170()
Aug 14 23:28:04 trinity kernel: BTRFS: end < start 4094 18446744073709551615
Aug 14 23:28:04 trinity kernel: CPU: 0 PID: 5629 Comm: trinity-main Tainted: G    B   W    L 3.16.0-11149-gba36899-dirty #7
Aug 14 23:28:04 trinity kernel: Stack:
Aug 14 23:28:04 trinity kernel: 085bfd28 085bfd28 00000003 086f0547 859a8000 859afbd8 085da26e 859afb90
Aug 14 23:28:04 trinity kernel: 08501e1f 00000000 859afb64 859afbc8 0807cb95 085ed604 859afbf4 000015fd
Aug 14 23:28:04 trinity kernel: 085da26e 000001ae 082c9109 000001ae 082c9109 8640e500 00000000 859afc74
Aug 14 23:28:04 trinity kernel: Call Trace:
Aug 14 23:28:04 trinity kernel: [<08501e1f>] dump_stack+0x26/0x28
Aug 14 23:28:04 trinity kernel: [<0807cb95>] warn_slowpath_common+0x75/0xa0
Aug 14 23:28:04 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
Aug 14 23:28:04 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
Aug 14 23:28:04 trinity kernel: [<0807cc0e>] warn_slowpath_fmt+0x2e/0x30
Aug 14 23:28:04 trinity kernel: [<082c9109>] insert_state+0x69/0x170
Aug 14 23:28:04 trinity kernel: [<082c9527>] __set_extent_bit+0x177/0x730
Aug 14 23:28:04 trinity kernel: [<082cab09>] lock_extent_bits+0x59/0x230
Aug 14 23:28:04 trinity kernel: [<082b593d>] btrfs_evict_inode+0x14d/0x5a0
Aug 14 23:28:04 trinity kernel: [<08125ffd>] evict+0xdd/0x1b0
Aug 14 23:28:04 trinity kernel: [<08506281>] ? _raw_spin_lock+0x11/0x20
Aug 14 23:28:04 trinity kernel: [<08126c7d>] iput+0x16d/0x180
Aug 14 23:28:04 trinity kernel: [<08122888>] __dentry_kill+0x138/0x200
Aug 14 23:28:04 trinity kernel: [<081230a6>] dput+0x156/0x180
Aug 14 23:28:04 trinity kernel: [<0810ed45>] __fput+0x175/0x190
Aug 14 23:28:04 trinity kernel: [<0810eb90>] ? file_free_rcu+0x0/0x40
Aug 14 23:28:04 trinity kernel: [<0810ed9b>] ____fput+0xb/0x10
Aug 14 23:28:04 trinity kernel: [<08092756>] task_work_run+0x76/0x90
Aug 14 23:28:04 trinity kernel: [<0807e8dd>] do_exit+0x32d/0x940
Aug 14 23:28:04 trinity kernel: [<0807efd2>] do_group_exit+0xa2/0xf0
Aug 14 23:28:04 trinity kernel: [<0807f037>] SyS_exit_group+0x17/0x20
Aug 14 23:28:04 trinity kernel: [<080629e0>] handle_syscall+0x60/0x80
Aug 14 23:28:04 trinity kernel: [<080e4290>] ? shmem_setattr+0xc0/0x2d0
Aug 14 23:28:04 trinity kernel: [<084c04cc>] ? ptrace+0x2c/0x70
Aug 14 23:28:04 trinity kernel: [<080794a2>] ? get_fp_registers+0x22/0x40
Aug 14 23:28:04 trinity kernel: [<080745ac>] userspace+0x46c/0x5e0
Aug 14 23:28:04 trinity kernel: [<080799f6>] ? os_set_thread_area+0x26/0x40
Aug 14 23:28:04 trinity kernel: [<08078a0c>] ? do_set_thread_area+0x1c/0x50
Aug 14 23:28:04 trinity kernel: [<08078b88>] ? arch_switch_tls+0xb8/0x100
Aug 14 23:28:04 trinity kernel: [<0805f720>] fork_handler+0x60/0x70
Aug 14 23:28:04 trinity kernel:
Aug 14 23:28:04 trinity kernel: ---[ end trace 77e962ef5942c6fd ]---



(The "dirty" comes from an UML fix for kernel/resource.c pending to be come into mainline soon)

-- 
Toralf


^ permalink raw reply	[flat|nested] 5+ messages in thread
* Re: fuzz testing a 32 bit x86 user mode linux guest brought a BUG in
  2014-08-14 21:56 fuzz testing a 32 bit x86 user mode linux guest brought a BUG in Toralf Förster
@ 2014-08-25  4:12 ` Liu Bo
  2014-08-25 16:14   ` Toralf Förster
  0 siblings, 1 reply; 5+ messages in thread
From: Liu Bo @ 2014-08-25  4:12 UTC (permalink / raw)
  To: Toralf Förster; +Cc: linux-btrfs

On Thu, Aug 14, 2014 at 11:56:37PM +0200, Toralf Förster wrote:
> 
> Hello,
> 
> a recent kernel brought up this while using trinity inside a x86 UML (stable Gentoo Linux):

Could you please elaborate what options of trinity you're using?

thanks,
-liubo

> 
> 
> Aug 14 22:07:06 trinity kernel: ------------[ cut here ]------------
> Aug 14 22:07:06 trinity kernel: WARNING: CPU: 0 PID: 5860 at fs/btrfs/extent_io.c:430 insert_state+0x69/0x170()
> Aug 14 22:07:06 trinity kernel: BTRFS: end < start 4094 18446744073709551615
> Aug 14 22:07:06 trinity kernel: CPU: 0 PID: 5860 Comm: trinity-c1 Tainted: G    B          3.16.0-11149-gba36899-dirty #7
> Aug 14 22:07:06 trinity kernel: Stack:
> Aug 14 22:07:06 trinity kernel: 085bfd28 085bfd28 00000003 086f0547 0d2e0000 0d2e7cec 085da26e 0d2e7ca4
> Aug 14 22:07:06 trinity kernel: 08501e1f 00000000 0d2e7c78 0d2e7cdc 0807cb95 085ed604 0d2e7d08 000016e4
> Aug 14 22:07:06 trinity kernel: 085da26e 000001ae 082c9109 000001ae 082c9109 00000000 00000000 0d2e7d88
> Aug 14 22:07:06 trinity kernel: Call Trace:
> Aug 14 22:07:06 trinity kernel: [<08501e1f>] dump_stack+0x26/0x28
> Aug 14 22:07:06 trinity kernel: [<0807cb95>] warn_slowpath_common+0x75/0xa0
> Aug 14 22:07:06 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
> Aug 14 22:07:06 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
> Aug 14 22:07:06 trinity kernel: [<0807cc0e>] warn_slowpath_fmt+0x2e/0x30
> Aug 14 22:07:06 trinity kernel: [<082c9109>] insert_state+0x69/0x170
> Aug 14 22:07:06 trinity kernel: [<082c9527>] __set_extent_bit+0x177/0x730
> Aug 14 22:07:06 trinity kernel: [<08078a0c>] ? do_set_thread_area+0x1c/0x50
> Aug 14 22:07:06 trinity kernel: [<082cab09>] lock_extent_bits+0x59/0x230
> Aug 14 22:07:06 trinity kernel: [<080975ac>] ? finish_task_switch.constprop.53+0x3c/0x90
> Aug 14 22:07:06 trinity kernel: [<08504fc2>] ? mutex_lock+0x12/0x30
> Aug 14 22:07:06 trinity kernel: [<082bcea5>] btrfs_file_llseek+0x1a5/0x440
> Aug 14 22:07:06 trinity kernel: [<08504f9d>] ? __mutex_lock_slowpath+0x28d/0x2a0
> Aug 14 22:07:06 trinity kernel: [<0810d1bf>] vfs_llseek+0x3f/0x50
> Aug 14 22:07:06 trinity kernel: [<0810d217>] SyS_lseek+0x47/0xb0
> Aug 14 22:07:06 trinity kernel: [<080629e0>] handle_syscall+0x60/0x80
> Aug 14 22:07:06 trinity kernel: [<084c04cc>] ? ptrace+0x2c/0x70
> Aug 14 22:07:06 trinity kernel: [<080794a2>] ? get_fp_registers+0x22/0x40
> Aug 14 22:07:06 trinity kernel: [<080745ac>] userspace+0x46c/0x5e0
> Aug 14 22:07:06 trinity kernel: [<080799f6>] ? os_set_thread_area+0x26/0x40
> Aug 14 22:07:06 trinity kernel: [<08078a0c>] ? do_set_thread_area+0x1c/0x50
> Aug 14 22:07:06 trinity kernel: [<08078b88>] ? arch_switch_tls+0xb8/0x100
> Aug 14 22:07:06 trinity kernel: [<0805f720>] fork_handler+0x60/0x70
> Aug 14 22:07:06 trinity kernel:
> Aug 14 22:07:06 trinity kernel: ---[ end trace 77e962ef58783178 ]---
> Aug 14 22:07:06 trinity trinity: Detected kernel tainting. Last seed was 1274643378
> Aug 14 23:28:04 trinity kernel: 08501e1f 00000000 859afb64 859afbc8 0807cb95 085ed604 859afbf4 000015fd
> Aug 14 23:28:04 trinity kernel: 085da26e 000001ae 082c9109 000001ae 082c9109 8640e500 00000000 859afc74
> Aug 14 23:28:04 trinity kernel: Call Trace:
> Aug 14 23:28:04 trinity kernel: [<08501e1f>] dump_stack+0x26/0x28
> Aug 14 23:28:04 trinity kernel: [<0807cb95>] warn_slowpath_common+0x75/0xa0
> Aug 14 23:28:04 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
> Aug 14 23:28:04 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
> Aug 14 23:28:04 trinity kernel: [<0807cc0e>] warn_slowpath_fmt+0x2e/0x30
> Aug 14 23:28:04 trinity kernel: [<082c9109>] insert_state+0x69/0x170
> Aug 14 23:28:04 trinity kernel: [<082c9527>] __set_extent_bit+0x177/0x730
> Aug 14 23:28:04 trinity kernel: [<082cab09>] lock_extent_bits+0x59/0x230
> Aug 14 23:28:04 trinity kernel: [<082b593d>] btrfs_evict_inode+0x14d/0x5a0
> Aug 14 23:28:04 trinity kernel: [<08125ffd>] evict+0xdd/0x1b0
> Aug 14 23:28:04 trinity kernel: [<08506281>] ? _raw_spin_lock+0x11/0x20
> Aug 14 23:28:04 trinity kernel: [<08126c7d>] iput+0x16d/0x180
> Aug 14 23:28:04 trinity kernel: [<08122888>] __dentry_kill+0x138/0x200
> Aug 14 23:28:04 trinity kernel: [<081230a6>] dput+0x156/0x180
> Aug 14 23:28:04 trinity kernel: [<0810ed45>] __fput+0x175/0x190
> Aug 14 23:28:04 trinity kernel: [<0810eb90>] ? file_free_rcu+0x0/0x40
> Aug 14 23:28:04 trinity kernel: [<0810ed9b>] ____fput+0xb/0x10
> Aug 14 23:28:04 trinity kernel: [<08092756>] task_work_run+0x76/0x90
> Aug 14 23:28:04 trinity kernel: [<0807e8dd>] do_exit+0x32d/0x940
> Aug 14 23:28:04 trinity kernel: [<0807efd2>] do_group_exit+0xa2/0xf0
> Aug 14 23:28:04 trinity kernel: [<0807f037>] SyS_exit_group+0x17/0x20
> Aug 14 23:28:04 trinity kernel: [<080629e0>] handle_syscall+0x60/0x80
> Aug 14 23:28:04 trinity kernel: [<080e4290>] ? shmem_setattr+0xc0/0x2d0
> Aug 14 23:28:04 trinity kernel: [<084c04cc>] ? ptrace+0x2c/0x70
> Aug 14 23:28:04 trinity kernel: [<080794a2>] ? get_fp_registers+0x22/0x40
> Aug 14 23:28:04 trinity kernel: [<080745ac>] userspace+0x46c/0x5e0
> Aug 14 23:28:04 trinity kernel: [<080799f6>] ? os_set_thread_area+0x26/0x40
> Aug 14 23:28:04 trinity kernel: [<08078a0c>] ? do_set_thread_area+0x1c/0x50
> Aug 14 23:28:04 trinity kernel: [<08078b88>] ? arch_switch_tls+0xb8/0x100
> Aug 14 23:28:04 trinity kernel: [<0805f720>] fork_handler+0x60/0x70
> Aug 14 23:28:04 trinity kernel:
> Aug 14 23:28:04 trinity kernel: ---[ end trace 77e962ef5942c6fc ]---
> Aug 14 23:28:04 trinity kernel: ------------[ cut here ]------------
> Aug 14 23:28:04 trinity kernel: WARNING: CPU: 0 PID: 5629 at fs/btrfs/extent_io.c:430 insert_state+0x69/0x170()
> Aug 14 23:28:04 trinity kernel: BTRFS: end < start 4094 18446744073709551615
> Aug 14 23:28:04 trinity kernel: CPU: 0 PID: 5629 Comm: trinity-main Tainted: G    B   W    L 3.16.0-11149-gba36899-dirty #7
> Aug 14 23:28:04 trinity kernel: Stack:
> Aug 14 23:28:04 trinity kernel: 085bfd28 085bfd28 00000003 086f0547 859a8000 859afbd8 085da26e 859afb90
> Aug 14 23:28:04 trinity kernel: 08501e1f 00000000 859afb64 859afbc8 0807cb95 085ed604 859afbf4 000015fd
> Aug 14 23:28:04 trinity kernel: 085da26e 000001ae 082c9109 000001ae 082c9109 8640e500 00000000 859afc74
> Aug 14 23:28:04 trinity kernel: Call Trace:
> Aug 14 23:28:04 trinity kernel: [<08501e1f>] dump_stack+0x26/0x28
> Aug 14 23:28:04 trinity kernel: [<0807cb95>] warn_slowpath_common+0x75/0xa0
> Aug 14 23:28:04 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
> Aug 14 23:28:04 trinity kernel: [<082c9109>] ? insert_state+0x69/0x170
> Aug 14 23:28:04 trinity kernel: [<0807cc0e>] warn_slowpath_fmt+0x2e/0x30
> Aug 14 23:28:04 trinity kernel: [<082c9109>] insert_state+0x69/0x170
> Aug 14 23:28:04 trinity kernel: [<082c9527>] __set_extent_bit+0x177/0x730
> Aug 14 23:28:04 trinity kernel: [<082cab09>] lock_extent_bits+0x59/0x230
> Aug 14 23:28:04 trinity kernel: [<082b593d>] btrfs_evict_inode+0x14d/0x5a0
> Aug 14 23:28:04 trinity kernel: [<08125ffd>] evict+0xdd/0x1b0
> Aug 14 23:28:04 trinity kernel: [<08506281>] ? _raw_spin_lock+0x11/0x20
> Aug 14 23:28:04 trinity kernel: [<08126c7d>] iput+0x16d/0x180
> Aug 14 23:28:04 trinity kernel: [<08122888>] __dentry_kill+0x138/0x200
> Aug 14 23:28:04 trinity kernel: [<081230a6>] dput+0x156/0x180
> Aug 14 23:28:04 trinity kernel: [<0810ed45>] __fput+0x175/0x190
> Aug 14 23:28:04 trinity kernel: [<0810eb90>] ? file_free_rcu+0x0/0x40
> Aug 14 23:28:04 trinity kernel: [<0810ed9b>] ____fput+0xb/0x10
> Aug 14 23:28:04 trinity kernel: [<08092756>] task_work_run+0x76/0x90
> Aug 14 23:28:04 trinity kernel: [<0807e8dd>] do_exit+0x32d/0x940
> Aug 14 23:28:04 trinity kernel: [<0807efd2>] do_group_exit+0xa2/0xf0
> Aug 14 23:28:04 trinity kernel: [<0807f037>] SyS_exit_group+0x17/0x20
> Aug 14 23:28:04 trinity kernel: [<080629e0>] handle_syscall+0x60/0x80
> Aug 14 23:28:04 trinity kernel: [<080e4290>] ? shmem_setattr+0xc0/0x2d0
> Aug 14 23:28:04 trinity kernel: [<084c04cc>] ? ptrace+0x2c/0x70
> Aug 14 23:28:04 trinity kernel: [<080794a2>] ? get_fp_registers+0x22/0x40
> Aug 14 23:28:04 trinity kernel: [<080745ac>] userspace+0x46c/0x5e0
> Aug 14 23:28:04 trinity kernel: [<080799f6>] ? os_set_thread_area+0x26/0x40
> Aug 14 23:28:04 trinity kernel: [<08078a0c>] ? do_set_thread_area+0x1c/0x50
> Aug 14 23:28:04 trinity kernel: [<08078b88>] ? arch_switch_tls+0xb8/0x100
> Aug 14 23:28:04 trinity kernel: [<0805f720>] fork_handler+0x60/0x70
> Aug 14 23:28:04 trinity kernel:
> Aug 14 23:28:04 trinity kernel: ---[ end trace 77e962ef5942c6fd ]---
> 
> 
> 
> (The "dirty" comes from an UML fix for kernel/resource.c pending to be come into mainline soon)
> 
> -- 
> Toralf
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

^ permalink raw reply	[flat|nested] 5+ messages in thread
* Re: fuzz testing a 32 bit x86 user mode linux guest brought a BUG in
  2014-08-25  4:12 ` Liu Bo
@ 2014-08-25 16:14   ` Toralf Förster
  2014-08-26  8:11     ` Liu Bo
  0 siblings, 1 reply; 5+ messages in thread
From: Toralf Förster @ 2014-08-25 16:14 UTC (permalink / raw)
  To: bo.li.liu; +Cc: linux-btrfs

On 08/25/2014 06:12 AM, Liu Bo wrote:
> Could you please elaborate what options of trinity you're using?
> 
> thanks,
> -liubo

$> nice trinity.sh -t "-C 2 -N 100000 -x mremap -x munmap -x madvise -q" -v /mnt/btrfs

So for UML I excluded in the past those 3 syscalls (nowadays no longer necessary), run 2 clients in parallel, the BTRFS fs was created in this manner :

dd if=/dev/zero of=/mnt/ramdisk/btrfs.fs bs=1M count=97 2>/dev/null; /sbin/mkfs.btrfs /mnt/ramdisk/btrfs.fs 1>/dev/null 2>&1; mount -o loop,compress=lzo /mnt/ramdisk/btrfs.fs /mnt/btrfs; chmod 777 /mnt/btrfs


-- 
Toralf
pgp key: 0076 E94E


^ permalink raw reply	[flat|nested] 5+ messages in thread
* Re: fuzz testing a 32 bit x86 user mode linux guest brought a BUG in
  2014-08-25 16:14   ` Toralf Förster
@ 2014-08-26  8:11     ` Liu Bo
  2014-08-26 11:14       ` Liu Bo
  0 siblings, 1 reply; 5+ messages in thread
From: Liu Bo @ 2014-08-26  8:11 UTC (permalink / raw)
  To: Toralf Förster; +Cc: linux-btrfs

On Mon, Aug 25, 2014 at 06:14:41PM +0200, Toralf Förster wrote:
> On 08/25/2014 06:12 AM, Liu Bo wrote:
> > Could you please elaborate what options of trinity you're using?
> > 
> > thanks,
> > -liubo
> 
> $> nice trinity.sh -t "-C 2 -N 100000 -x mremap -x munmap -x madvise -q" -v /mnt/btrfs
> 
> So for UML I excluded in the past those 3 syscalls (nowadays no longer necessary), run 2 clients in parallel, the BTRFS fs was created in this manner :
> 
> dd if=/dev/zero of=/mnt/ramdisk/btrfs.fs bs=1M count=97 2>/dev/null; /sbin/mkfs.btrfs /mnt/ramdisk/btrfs.fs 1>/dev/null 2>&1; mount -o loop,compress=lzo /mnt/ramdisk/btrfs.fs /mnt/btrfs; chmod 777 /mnt/btrfs
> 

How does this trinity.sh handle with "/mnt/btrfs"?

Is it something like this: 

cd /mnt/btrfs;
trinity "-C 2 -N 100000 -x mremap -x munmap -x madvise -q";

thanks, 
-liubo

^ permalink raw reply	[flat|nested] 5+ messages in thread
* Re: fuzz testing a 32 bit x86 user mode linux guest brought a BUG in
  2014-08-26  8:11     ` Liu Bo
@ 2014-08-26 11:14       ` Liu Bo
  0 siblings, 0 replies; 5+ messages in thread
From: Liu Bo @ 2014-08-26 11:14 UTC (permalink / raw)
  To: Toralf Förster; +Cc: linux-btrfs

On Tue, Aug 26, 2014 at 04:11:53PM +0800, Liu Bo wrote:
> On Mon, Aug 25, 2014 at 06:14:41PM +0200, Toralf Förster wrote:
> > On 08/25/2014 06:12 AM, Liu Bo wrote:
> > > Could you please elaborate what options of trinity you're using?
> > > 
> > > thanks,
> > > -liubo
> > 
> > $> nice trinity.sh -t "-C 2 -N 100000 -x mremap -x munmap -x madvise -q" -v /mnt/btrfs
> > 
> > So for UML I excluded in the past those 3 syscalls (nowadays no longer necessary), run 2 clients in parallel, the BTRFS fs was created in this manner :
> > 
> > dd if=/dev/zero of=/mnt/ramdisk/btrfs.fs bs=1M count=97 2>/dev/null; /sbin/mkfs.btrfs /mnt/ramdisk/btrfs.fs 1>/dev/null 2>&1; mount -o loop,compress=lzo /mnt/ramdisk/btrfs.fs /mnt/btrfs; chmod 777 /mnt/btrfs
> > 
> 
> How does this trinity.sh handle with "/mnt/btrfs"?
> 
> Is it something like this: 
> 
> cd /mnt/btrfs;
> trinity "-C 2 -N 100000 -x mremap -x munmap -x madvise -q";

FYI, I've reproduced this with a "-V /mnt/btrfs".

thanks,
-liubo

^ permalink raw reply	[flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-08-26 11:14 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-08-14 21:56 fuzz testing a 32 bit x86 user mode linux guest brought a BUG in Toralf Förster
2014-08-25  4:12 ` Liu Bo
2014-08-25 16:14   ` Toralf Förster
2014-08-26  8:11     ` Liu Bo
2014-08-26 11:14       ` Liu Bo

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