| Message ID | 20220322055702.95276-1-damien.lemoal@opensource.wdc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [v2] scsi: mpt3sas: fix use after free in _scsih_expander_node_remove() | expand |
On Tue, Mar 22, 2022 at 11:28 AM 'Damien Le Moal' via PDL-MPT-FUSIONLINUX <mpt-fusionlinux.pdl@broadcom.com> wrote: > > The function mpt3sas_transport_port_remove() called in > _scsih_expander_node_remove() frees the port field of the sas_expander > structure, leading to the following use-after-free splat from Kasan when > the ioc_info() call following that function is executed (e.g. when doing > rmmod of the driver module): > > [ 3479.371167] ================================================================== > [ 3479.378496] BUG: KASAN: use-after-free in _scsih_expander_node_remove+0x710/0x750 [mpt3sas] > [ 3479.386936] Read of size 1 at addr ffff8881c037691c by task rmmod/1531 > [ 3479.393524] > [ 3479.395035] CPU: 18 PID: 1531 Comm: rmmod Not tainted 5.17.0-rc8+ #1436 > [ 3479.401712] Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.1 06/02/2021 > [ 3479.409263] Call Trace: > [ 3479.411743] <TASK> > [ 3479.413875] dump_stack_lvl+0x45/0x59 > [ 3479.417582] print_address_description.constprop.0+0x1f/0x120 > [ 3479.423389] ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas] > [ 3479.429469] kasan_report.cold+0x83/0xdf > [ 3479.433438] ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas] > [ 3479.439514] _scsih_expander_node_remove+0x710/0x750 [mpt3sas] > [ 3479.445411] ? _raw_spin_unlock_irqrestore+0x2d/0x40 > [ 3479.452032] scsih_remove+0x525/0xc90 [mpt3sas] > [ 3479.458212] ? mpt3sas_expander_remove+0x1d0/0x1d0 [mpt3sas] > [ 3479.465529] ? down_write+0xde/0x150 > [ 3479.470746] ? up_write+0x14d/0x460 > [ 3479.475840] ? kernfs_find_ns+0x137/0x310 > [ 3479.481438] pci_device_remove+0x65/0x110 > [ 3479.487013] __device_release_driver+0x316/0x680 > [ 3479.493180] driver_detach+0x1ec/0x2d0 > [ 3479.498499] bus_remove_driver+0xe7/0x2d0 > [ 3479.504081] pci_unregister_driver+0x26/0x250 > [ 3479.510033] _mpt3sas_exit+0x2b/0x6cf [mpt3sas] > [ 3479.516144] __x64_sys_delete_module+0x2fd/0x510 > [ 3479.522315] ? free_module+0xaa0/0xaa0 > [ 3479.527593] ? __cond_resched+0x1c/0x90 > [ 3479.532951] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 > [ 3479.539607] ? syscall_enter_from_user_mode+0x21/0x70 > [ 3479.546161] ? trace_hardirqs_on+0x1c/0x110 > [ 3479.551828] do_syscall_64+0x35/0x80 > [ 3479.556884] entry_SYSCALL_64_after_hwframe+0x44/0xae > [ 3479.563402] RIP: 0033:0x7f1fc482483b > ... > [ 3479.943087] ================================================================== > > Fix this by introducing the local variable port_id to store the port ID > value before executing mpt3sas_transport_port_remove(). This local > variable is then used in the call to ioc_info() instead of dereferencing > the freed port structure. > > Fixes: 7d310f241001 ("scsi: mpt3sas: Get device objects using sas_address & portID") > Cc: stable@vger.kernel.org > Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> Thanks for the patch. Ack-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com> > --- > Changes from v1: > * Use local variable to store the port ID instead of reversing the calls > to ioc_info() and mpt3sas_transport_port_remove(). > > drivers/scsi/mpt3sas/mpt3sas_scsih.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c > index 00792767c620..7e476f50935b 100644 > --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c > +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c > @@ -11035,6 +11035,7 @@ _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc, > { > struct _sas_port *mpt3sas_port, *next; > unsigned long flags; > + int port_id; > > /* remove sibling ports attached to this expander */ > list_for_each_entry_safe(mpt3sas_port, next, > @@ -11055,6 +11056,8 @@ _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc, > mpt3sas_port->hba_port); > } > > + port_id = sas_expander->port->port_id; > + > mpt3sas_transport_port_remove(ioc, sas_expander->sas_address, > sas_expander->sas_address_parent, sas_expander->port); > > @@ -11062,7 +11065,7 @@ _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc, > "expander_remove: handle(0x%04x), sas_addr(0x%016llx), port:%d\n", > sas_expander->handle, (unsigned long long) > sas_expander->sas_address, > - sas_expander->port->port_id); > + port_id); > > spin_lock_irqsave(&ioc->sas_node_lock, flags); > list_del(&sas_expander->list); > -- > 2.35.1 >
Damien, > The function mpt3sas_transport_port_remove() called in > _scsih_expander_node_remove() frees the port field of the sas_expander > structure, leading to the following use-after-free splat from Kasan > when the ioc_info() call following that function is executed > (e.g. when doing rmmod of the driver module): Applied to 5.18/scsi-staging, thanks!
On Tue, 22 Mar 2022 14:57:02 +0900, Damien Le Moal wrote: > The function mpt3sas_transport_port_remove() called in > _scsih_expander_node_remove() frees the port field of the sas_expander > structure, leading to the following use-after-free splat from Kasan when > the ioc_info() call following that function is executed (e.g. when doing > rmmod of the driver module): > > [ 3479.371167] ================================================================== > [ 3479.378496] BUG: KASAN: use-after-free in _scsih_expander_node_remove+0x710/0x750 [mpt3sas] > [ 3479.386936] Read of size 1 at addr ffff8881c037691c by task rmmod/1531 > [ 3479.393524] > [ 3479.395035] CPU: 18 PID: 1531 Comm: rmmod Not tainted 5.17.0-rc8+ #1436 > [ 3479.401712] Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.1 06/02/2021 > [ 3479.409263] Call Trace: > [ 3479.411743] <TASK> > [ 3479.413875] dump_stack_lvl+0x45/0x59 > [ 3479.417582] print_address_description.constprop.0+0x1f/0x120 > [ 3479.423389] ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas] > [ 3479.429469] kasan_report.cold+0x83/0xdf > [ 3479.433438] ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas] > [ 3479.439514] _scsih_expander_node_remove+0x710/0x750 [mpt3sas] > [ 3479.445411] ? _raw_spin_unlock_irqrestore+0x2d/0x40 > [ 3479.452032] scsih_remove+0x525/0xc90 [mpt3sas] > [ 3479.458212] ? mpt3sas_expander_remove+0x1d0/0x1d0 [mpt3sas] > [ 3479.465529] ? down_write+0xde/0x150 > [ 3479.470746] ? up_write+0x14d/0x460 > [ 3479.475840] ? kernfs_find_ns+0x137/0x310 > [ 3479.481438] pci_device_remove+0x65/0x110 > [ 3479.487013] __device_release_driver+0x316/0x680 > [ 3479.493180] driver_detach+0x1ec/0x2d0 > [ 3479.498499] bus_remove_driver+0xe7/0x2d0 > [ 3479.504081] pci_unregister_driver+0x26/0x250 > [ 3479.510033] _mpt3sas_exit+0x2b/0x6cf [mpt3sas] > [ 3479.516144] __x64_sys_delete_module+0x2fd/0x510 > [ 3479.522315] ? free_module+0xaa0/0xaa0 > [ 3479.527593] ? __cond_resched+0x1c/0x90 > [ 3479.532951] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 > [ 3479.539607] ? syscall_enter_from_user_mode+0x21/0x70 > [ 3479.546161] ? trace_hardirqs_on+0x1c/0x110 > [ 3479.551828] do_syscall_64+0x35/0x80 > [ 3479.556884] entry_SYSCALL_64_after_hwframe+0x44/0xae > [ 3479.563402] RIP: 0033:0x7f1fc482483b > ... > [ 3479.943087] ================================================================== > > [...] Applied to 5.18/scsi-fixes, thanks! [1/1] scsi: mpt3sas: fix use after free in _scsih_expander_node_remove() https://git.kernel.org/mkp/scsi/c/87d663d40801
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c index 00792767c620..7e476f50935b 100644 --- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c +++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c @@ -11035,6 +11035,7 @@ _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc, { struct _sas_port *mpt3sas_port, *next; unsigned long flags; + int port_id; /* remove sibling ports attached to this expander */ list_for_each_entry_safe(mpt3sas_port, next, @@ -11055,6 +11056,8 @@ _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc, mpt3sas_port->hba_port); } + port_id = sas_expander->port->port_id; + mpt3sas_transport_port_remove(ioc, sas_expander->sas_address, sas_expander->sas_address_parent, sas_expander->port); @@ -11062,7 +11065,7 @@ _scsih_expander_node_remove(struct MPT3SAS_ADAPTER *ioc, "expander_remove: handle(0x%04x), sas_addr(0x%016llx), port:%d\n", sas_expander->handle, (unsigned long long) sas_expander->sas_address, - sas_expander->port->port_id); + port_id); spin_lock_irqsave(&ioc->sas_node_lock, flags); list_del(&sas_expander->list);
The function mpt3sas_transport_port_remove() called in _scsih_expander_node_remove() frees the port field of the sas_expander structure, leading to the following use-after-free splat from Kasan when the ioc_info() call following that function is executed (e.g. when doing rmmod of the driver module): [ 3479.371167] ================================================================== [ 3479.378496] BUG: KASAN: use-after-free in _scsih_expander_node_remove+0x710/0x750 [mpt3sas] [ 3479.386936] Read of size 1 at addr ffff8881c037691c by task rmmod/1531 [ 3479.393524] [ 3479.395035] CPU: 18 PID: 1531 Comm: rmmod Not tainted 5.17.0-rc8+ #1436 [ 3479.401712] Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.1 06/02/2021 [ 3479.409263] Call Trace: [ 3479.411743] <TASK> [ 3479.413875] dump_stack_lvl+0x45/0x59 [ 3479.417582] print_address_description.constprop.0+0x1f/0x120 [ 3479.423389] ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas] [ 3479.429469] kasan_report.cold+0x83/0xdf [ 3479.433438] ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas] [ 3479.439514] _scsih_expander_node_remove+0x710/0x750 [mpt3sas] [ 3479.445411] ? _raw_spin_unlock_irqrestore+0x2d/0x40 [ 3479.452032] scsih_remove+0x525/0xc90 [mpt3sas] [ 3479.458212] ? mpt3sas_expander_remove+0x1d0/0x1d0 [mpt3sas] [ 3479.465529] ? down_write+0xde/0x150 [ 3479.470746] ? up_write+0x14d/0x460 [ 3479.475840] ? kernfs_find_ns+0x137/0x310 [ 3479.481438] pci_device_remove+0x65/0x110 [ 3479.487013] __device_release_driver+0x316/0x680 [ 3479.493180] driver_detach+0x1ec/0x2d0 [ 3479.498499] bus_remove_driver+0xe7/0x2d0 [ 3479.504081] pci_unregister_driver+0x26/0x250 [ 3479.510033] _mpt3sas_exit+0x2b/0x6cf [mpt3sas] [ 3479.516144] __x64_sys_delete_module+0x2fd/0x510 [ 3479.522315] ? free_module+0xaa0/0xaa0 [ 3479.527593] ? __cond_resched+0x1c/0x90 [ 3479.532951] ? lockdep_hardirqs_on_prepare+0x273/0x3e0 [ 3479.539607] ? syscall_enter_from_user_mode+0x21/0x70 [ 3479.546161] ? trace_hardirqs_on+0x1c/0x110 [ 3479.551828] do_syscall_64+0x35/0x80 [ 3479.556884] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 3479.563402] RIP: 0033:0x7f1fc482483b ... [ 3479.943087] ================================================================== Fix this by introducing the local variable port_id to store the port ID value before executing mpt3sas_transport_port_remove(). This local variable is then used in the call to ioc_info() instead of dereferencing the freed port structure. Fixes: 7d310f241001 ("scsi: mpt3sas: Get device objects using sas_address & portID") Cc: stable@vger.kernel.org Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com> --- Changes from v1: * Use local variable to store the port ID instead of reversing the calls to ioc_info() and mpt3sas_transport_port_remove(). drivers/scsi/mpt3sas/mpt3sas_scsih.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)