From f07e16a2a76545a3afd4bf114741789537280f82 Mon Sep 17 00:00:00 2001 From: CentOS Sources Date: Mar 16 2021 10:30:44 +0000 Subject: import kpatch-patch-3_10_0-1160_6_1-1-3.el7 --- diff --git a/SOURCES/target-scsi-Fix-XCOPY-NAA-identifier-lookup.patch b/SOURCES/target-scsi-Fix-XCOPY-NAA-identifier-lookup.patch new file mode 100644 index 0000000..7add89a --- /dev/null +++ b/SOURCES/target-scsi-Fix-XCOPY-NAA-identifier-lookup.patch @@ -0,0 +1,334 @@ +From 575d2ac72342beea5c3d63fc655d5d173b01283a Mon Sep 17 00:00:00 2001 +From: Artem Savkov +Date: Tue, 2 Feb 2021 11:12:30 +0100 +Subject: [RHEL7.9 KPATCH v2] [target] scsi: Fix XCOPY NAA identifier lookup + +Kernels: +3.10.0-1160.el7 +3.10.0-1160.2.1.el7 +3.10.0-1160.2.2.el7 +3.10.0-1160.6.1.el7 +3.10.0-1160.11.1.el7 + +Changes since last build: +[x86_64]: +target_core_xcopy.o: changed function: target_do_xcopy +target_core_xcopy.o: changed function: target_parse_xcopy_cmd +target_core_xcopy.o: changed function: target_xcopy_do_work +target_core_xcopy.o: changed function: target_xcopy_locate_se_dev_e4 +target_core_xcopy.o: changed function: xcopy_pt_undepend_remotedev + +[ppc64le]: +target_core_xcopy.o: changed function: target_do_receive_copy_results +target_core_xcopy.o: changed function: target_do_xcopy +target_core_xcopy.o: changed function: target_parse_xcopy_cmd +target_core_xcopy.o: changed function: target_xcopy_do_work +target_core_xcopy.o: new function: target_xcopy_locate_se_dev_e4 +target_core_xcopy.o: new function: xcopy_pt_undepend_remotedev + +--------------------------- + +Modifications: shadow var instead of structure fixup + +commit 173ce8ce7c0c334c3406b4826dca6732f101dd2e +Author: Maurizio Lombardi +Date: Mon Jan 18 16:24:30 2021 -0500 + + [target] scsi: Fix XCOPY NAA identifier lookup + + Message-id: <20210118162431.74459-1-mlombard@redhat.com> + Patchwork-id: 10208 + Patchwork-instance: patchwork-private + O-Subject: [kernel team] [CVE-2020-28374 RHEL7.9.z e-stor PATCH] scsi: target: Fix XCOPY NAA identifier lookup + Bugzilla: 1900469 + CVE: CVE-2020-28374 + RH-Acked-by: Tomas Henzl + RH-Acked-by: Ewan D. Milne + + From: David Disseldorp + + BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1900469 + Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=34294843 + Upstream: cherry-picked from the mainline tree + + When attempting to match EXTENDED COPY CSCD descriptors with corresponding + se_devices, target_xcopy_locate_se_dev_e4() currently iterates over LIO's + global devices list which includes all configured backstores. + + This change ensures that only initiator-accessible backstores are + considered during CSCD descriptor lookup, according to the session's + se_node_acl LUN list. + + To avoid LUN removal race conditions, device pinning is changed from being + configfs based to instead using the se_node_acl lun_ref. + + Reference: CVE-2020-28374 + Fixes: cbf031f425fd ("target: Add support for EXTENDED_COPY copy offload emulation") + Reviewed-by: Lee Duncan + Signed-off-by: David Disseldorp + Signed-off-by: Mike Christie + Signed-off-by: Martin K. Petersen + (cherry picked from commit 2896c93811e39d63a4d9b63ccf12a8fbc226e5e4) + Signed-off-by: Maurizio Lombardi + Signed-off-by: Augusto Caringi + +Signed-off-by: Artem Savkov +Acked-by: Joe Lawrence +Acked-by: Josh Poimboeuf +--- + drivers/target/target_core_xcopy.c | 143 +++++++++++++++++++---------- + 1 file changed, 95 insertions(+), 48 deletions(-) + +diff --git a/drivers/target/target_core_xcopy.c b/drivers/target/target_core_xcopy.c +index 252de556dbb3..4d023e403845 100644 +--- a/drivers/target/target_core_xcopy.c ++++ b/drivers/target/target_core_xcopy.c +@@ -38,6 +38,8 @@ + #include "target_core_ua.h" + #include "target_core_xcopy.h" + ++#define KLP_SHADOW_REMOTE_LUN_REF 0x2020283740000000 ++ + static struct workqueue_struct *xcopy_wq = NULL; + + static sense_reason_t target_parse_xcopy_cmd(struct xcopy_op *xop); +@@ -55,60 +57,83 @@ static int target_xcopy_gen_naa_ieee(struct se_device *dev, unsigned char *buf) + return 0; + } + +-struct xcopy_dev_search_info { +- const unsigned char *dev_wwn; +- struct se_device *found_dev; +-}; +- ++/** ++ * target_xcopy_locate_se_dev_e4_iter - compare XCOPY NAA device identifiers ++ * ++ * @se_dev: device being considered for match ++ * @dev_wwn: XCOPY requested NAA dev_wwn ++ * @return: 1 on match, 0 on no-match ++ */ + static int target_xcopy_locate_se_dev_e4_iter(struct se_device *se_dev, +- void *data) ++ const unsigned char *dev_wwn) + { +- struct xcopy_dev_search_info *info = data; + unsigned char tmp_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN]; + int rc; + +- if (!se_dev->dev_attrib.emulate_3pc) ++ if (!se_dev->dev_attrib.emulate_3pc) { ++ pr_debug("XCOPY: emulate_3pc disabled on se_dev %p\n", se_dev); + return 0; ++ } + + memset(&tmp_dev_wwn[0], 0, XCOPY_NAA_IEEE_REGEX_LEN); + target_xcopy_gen_naa_ieee(se_dev, &tmp_dev_wwn[0]); + +- rc = memcmp(&tmp_dev_wwn[0], info->dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); +- if (rc != 0) +- return 0; +- +- info->found_dev = se_dev; +- pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev); +- +- rc = target_depend_item(&se_dev->dev_group.cg_item); ++ rc = memcmp(&tmp_dev_wwn[0], dev_wwn, XCOPY_NAA_IEEE_REGEX_LEN); + if (rc != 0) { +- pr_err("configfs_depend_item attempt failed: %d for se_dev: %p\n", +- rc, se_dev); +- return rc; ++ pr_debug("XCOPY: skip non-matching: %*ph\n", ++ XCOPY_NAA_IEEE_REGEX_LEN, tmp_dev_wwn); ++ return 0; + } ++ pr_debug("XCOPY 0xe4: located se_dev: %p\n", se_dev); + +- pr_debug("Called configfs_depend_item for se_dev: %p se_dev->se_dev_group: %p\n", +- se_dev, &se_dev->dev_group); + return 1; + } + +-static int target_xcopy_locate_se_dev_e4(const unsigned char *dev_wwn, +- struct se_device **found_dev) ++static int target_xcopy_locate_se_dev_e4(struct se_session *sess, ++ const unsigned char *dev_wwn, ++ struct se_device **_found_dev, ++ struct percpu_ref **_found_lun_ref) + { +- struct xcopy_dev_search_info info; +- int ret; +- +- memset(&info, 0, sizeof(info)); +- info.dev_wwn = dev_wwn; +- +- ret = target_for_each_device(target_xcopy_locate_se_dev_e4_iter, &info); +- if (ret == 1) { +- *found_dev = info.found_dev; +- return 0; +- } else { +- pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); +- return -EINVAL; ++ struct se_dev_entry *deve; ++ struct se_node_acl *nacl; ++ struct se_lun *this_lun = NULL; ++ struct se_device *found_dev = NULL; ++ ++ /* cmd with NULL sess indicates no associated $FABRIC_MOD */ ++ if (!sess) ++ goto err_out; ++ ++ pr_debug("XCOPY 0xe4: searching for: %*ph\n", ++ XCOPY_NAA_IEEE_REGEX_LEN, dev_wwn); ++ ++ nacl = sess->se_node_acl; ++ rcu_read_lock(); ++ hlist_for_each_entry_rcu(deve, &nacl->lun_entry_hlist, link) { ++ struct se_device *this_dev; ++ int rc; ++ ++ this_lun = rcu_dereference(deve->se_lun); ++ this_dev = rcu_dereference_raw(this_lun->lun_se_dev); ++ ++ rc = target_xcopy_locate_se_dev_e4_iter(this_dev, dev_wwn); ++ if (rc) { ++ if (percpu_ref_tryget_live(&this_lun->lun_ref)) ++ found_dev = this_dev; ++ break; ++ } + } ++ rcu_read_unlock(); ++ if (found_dev == NULL) ++ goto err_out; ++ ++ pr_debug("lun_ref held for se_dev: %p se_dev->se_dev_group: %p\n", ++ found_dev, &found_dev->dev_group); ++ *_found_dev = found_dev; ++ *_found_lun_ref = &this_lun->lun_ref; ++ return 0; ++err_out: ++ pr_debug_ratelimited("Unable to locate 0xe4 descriptor for EXTENDED_COPY\n"); ++ return -EINVAL; + } + + static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op *xop, +@@ -197,6 +222,8 @@ static int target_xcopy_parse_tiddesc_e4(struct se_cmd *se_cmd, struct xcopy_op + return 0; + } + ++#include "kpatch-macros.h" ++ + static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, + struct xcopy_op *xop, unsigned char *p, + unsigned short tdll, sense_reason_t *sense_ret) +@@ -206,6 +233,7 @@ static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, + int offset = tdll % XCOPY_TARGET_DESC_LEN, rc; + unsigned short cscd_index = 0; + unsigned short start = 0; ++ struct percpu_ref **remote_lun_ref; + + *sense_ret = TCM_INVALID_PARAMETER_LIST; + +@@ -253,14 +281,24 @@ static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd, + } + } + ++ remote_lun_ref = klp_shadow_get_or_alloc(xop, KLP_SHADOW_REMOTE_LUN_REF, ++ sizeof(struct percpu_ref*), GFP_KERNEL, NULL, NULL); ++ ++ if (!remote_lun_ref) ++ goto out; ++ + switch (xop->op_origin) { + case XCOL_SOURCE_RECV_OP: +- rc = target_xcopy_locate_se_dev_e4(xop->dst_tid_wwn, +- &xop->dst_dev); ++ rc = target_xcopy_locate_se_dev_e4(se_cmd->se_sess, ++ xop->dst_tid_wwn, ++ &xop->dst_dev, ++ remote_lun_ref); + break; + case XCOL_DEST_RECV_OP: +- rc = target_xcopy_locate_se_dev_e4(xop->src_tid_wwn, +- &xop->src_dev); ++ rc = target_xcopy_locate_se_dev_e4(se_cmd->se_sess, ++ xop->src_tid_wwn, ++ &xop->src_dev, ++ remote_lun_ref); + break; + default: + pr_err("XCOPY CSCD descriptor IDs not found in CSCD list - " +@@ -406,18 +444,16 @@ static int xcopy_pt_get_cmd_state(struct se_cmd *se_cmd) + + static void xcopy_pt_undepend_remotedev(struct xcopy_op *xop) + { +- struct se_device *remote_dev; ++ struct percpu_ref **remote_lun_ref = klp_shadow_get(xop, ++ KLP_SHADOW_REMOTE_LUN_REF); + + if (xop->op_origin == XCOL_SOURCE_RECV_OP) +- remote_dev = xop->dst_dev; ++ pr_debug("putting dst lun_ref for %p\n", xop->dst_dev); + else +- remote_dev = xop->src_dev; ++ pr_debug("putting src lun_ref for %p\n", xop->src_dev); + +- pr_debug("Calling configfs_undepend_item for" +- " remote_dev: %p remote_dev->dev_group: %p\n", +- remote_dev, &remote_dev->dev_group.cg_item); +- +- target_undepend_item(&remote_dev->dev_group.cg_item); ++ if (remote_lun_ref) ++ percpu_ref_put(*remote_lun_ref); + } + + static void xcopy_pt_release_cmd(struct se_cmd *se_cmd) +@@ -857,6 +893,7 @@ static void target_xcopy_do_work(struct work_struct *work) + } + + xcopy_pt_undepend_remotedev(xop); ++ klp_shadow_free(xop, KLP_SHADOW_REMOTE_LUN_REF, NULL); + kfree(xop); + + pr_debug("target_xcopy_do_work: Final src_lba: %llu, dst_lba: %llu\n", +@@ -872,6 +909,7 @@ out: + xcopy_pt_undepend_remotedev(xop); + + err_free: ++ klp_shadow_free(xop, KLP_SHADOW_REMOTE_LUN_REF, NULL); + kfree(xop); + /* + * Don't override an error scsi status if it has already been set +@@ -981,6 +1019,7 @@ sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) + struct se_device *dev = se_cmd->se_dev; + struct xcopy_op *xop; + unsigned int sa; ++ struct percpu_ref **remote_lun_ref; + + if (!dev->dev_attrib.emulate_3pc) { + pr_err("EXTENDED_COPY operation explicitly disabled\n"); +@@ -1006,6 +1045,12 @@ sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) + xop = kzalloc(sizeof(struct xcopy_op), GFP_KERNEL); + if (!xop) + goto err; ++ ++ remote_lun_ref = klp_shadow_alloc(xop, KLP_SHADOW_REMOTE_LUN_REF, ++ sizeof(struct percpu_ref*), GFP_KERNEL, NULL, NULL); ++ if (!remote_lun_ref) ++ goto xop_free; ++ + xop->xop_se_cmd = se_cmd; + INIT_WORK(&xop->xop_work, target_xcopy_do_work); + if (WARN_ON_ONCE(!queue_work(xcopy_wq, &xop->xop_work))) +@@ -1013,6 +1058,8 @@ sense_reason_t target_do_xcopy(struct se_cmd *se_cmd) + return TCM_NO_SENSE; + + free: ++ klp_shadow_free(xop, KLP_SHADOW_REMOTE_LUN_REF, NULL); ++xop_free: + kfree(xop); + + err: +-- +2.26.2 + diff --git a/SOURCES/tty-Fix-pgrp-locking-in-tiocspgrp.patch b/SOURCES/tty-Fix-pgrp-locking-in-tiocspgrp.patch new file mode 100644 index 0000000..0d60ffc --- /dev/null +++ b/SOURCES/tty-Fix-pgrp-locking-in-tiocspgrp.patch @@ -0,0 +1,96 @@ +From 8a9cce994f0c37c1b4dfc313a1b01fb009c55d01 Mon Sep 17 00:00:00 2001 +From: Julien Thierry +Date: Thu, 21 Jan 2021 14:41:40 +0100 +Subject: [PATCH] [tty] Fix ->pgrp locking in tiocspgrp() + +Kernels: +3.10.0-1160.el7 +3.10.0-1160.2.1.el7 +3.10.0-1160.2.2.el7 +3.10.0-1160.6.1.el7 +3.10.0-1160.11.1.el7 +3.10.0-1160.15.1.el7 + +Changes since last build: +arches: x86_64 ppc64le +tty_io.o: changed function: tty_ioctl +--------------------------- + +Modifications: +None + +commit ba0ec80fb32a3ca6e15d51ddcb54c1095f04cf2a +Author: Chris von Recklinghausen +Date: Wed Jan 6 19:26:01 2021 -0500 + + [tty] Fix ->pgrp locking in tiocspgrp() + + Message-id: <20210106192601.11675-1-crecklin@redhat.com> + Patchwork-id: 10200 + Patchwork-instance: patchwork-private + O-Subject: [kernel team] [RHEL 7.9.Z bz1908193 CVE-2020-29661 PATCH] tty: Fix ->pgrp locking in tiocspgrp() + Bugzilla: 1908193 + CVE: CVE-2020-29661 + RH-Acked-by: Oleg Nesterov + RH-Acked-by: Waiman Long + + From: Jann Horn + + Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1908193 + Brew: https://brewweb.engineering.redhat.com/brew/taskinfo?taskID=34103731 + CVE: CVE-2020-29661 + Upstream Status: linux + Tested: CKI https://beaker.engineering.redhat.com/jobs/?jobsearch-0.table=Whiteboard&jobsearch-0.operation=contains&jobsearch-0.value=cki%40gitlab%3A620704 + bug has no reproducer + + Conflicts: tiocspgrp is defined in drivers/tty/tty_io.c in rhel7 so make + change there. + drop changes to drivers/tty/tty_jobctrl.c + + tiocspgrp() takes two tty_struct pointers: One to the tty that userspace + passed to ioctl() (`tty`) and one to the TTY being changed (`real_tty`). + These pointers are different when ioctl() is called with a master fd. + + To properly lock real_tty->pgrp, we must take real_tty->ctrl_lock. + + This bug makes it possible for racing ioctl(TIOCSPGRP, ...) calls on + both sides of a PTY pair to corrupt the refcount of `struct pid`, + leading to use-after-free errors. + + Fixes: 47f86834bbd4 ("redo locking of tty->pgrp") + CC: stable@kernel.org + Signed-off-by: Jann Horn + Reviewed-by: Jiri Slaby + Signed-off-by: Greg Kroah-Hartman + (cherry picked from commit 54ffccbf053b5b6ca4f6e45094b942fab92a25fc) + + Conflicts: + drivers/tty/tty_jobctrl.c + Signed-off-by: Chris von Recklinghausen + Signed-off-by: Augusto Caringi + +Signed-off-by: Julien Thierry +--- + drivers/tty/tty_io.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c +index c6e277aae06..713e1ad5c09 100644 +--- a/drivers/tty/tty_io.c ++++ b/drivers/tty/tty_io.c +@@ -2542,10 +2542,10 @@ static int tiocspgrp(struct tty_struct *tty, struct tty_struct *real_tty, pid_t + if (session_of_pgrp(pgrp) != task_session(current)) + goto out_unlock; + retval = 0; +- spin_lock_irqsave(&tty->ctrl_lock, flags); ++ spin_lock_irqsave(&real_tty->ctrl_lock, flags); + put_pid(real_tty->pgrp); + real_tty->pgrp = get_pid(pgrp); +- spin_unlock_irqrestore(&tty->ctrl_lock, flags); ++ spin_unlock_irqrestore(&real_tty->ctrl_lock, flags); + out_unlock: + rcu_read_unlock(); + return retval; +-- +2.25.4 + diff --git a/SPECS/kpatch-patch.spec b/SPECS/kpatch-patch.spec index de459b2..9264d01 100644 --- a/SPECS/kpatch-patch.spec +++ b/SPECS/kpatch-patch.spec @@ -6,13 +6,19 @@ %define kernel_ver 3.10.0-1160.6.1.el7 %define kpatch_ver 0.9.2 %define rpm_ver 1 -%define rpm_rel 1 +%define rpm_rel 3 %if !%{empty_package} # Patch sources below. DO NOT REMOVE THIS LINE. # # https://bugzilla.redhat.com/1881413 Source100: fs-xfs-fix-boundary-test-in-xfs_attr_shortform_verify.patch +# +# https://bugzilla.redhat.com/1908206 +Source101: tty-Fix-pgrp-locking-in-tiocspgrp.patch +# +# https://bugzilla.redhat.com/1902568 +Source102: target-scsi-Fix-XCOPY-NAA-identifier-lookup.patch # End of patch sources. DO NOT REMOVE THIS LINE. %endif @@ -145,6 +151,12 @@ It is only a method to subscribe to the kpatch stream for kernel-%{kernel_ver}. %endif %changelog +* Tue Feb 02 2021 Artem Savkov [1-3.el7] +- SCSI target (LIO) write to any block on ILO backstore [1902568] {CVE-2020-28374} + +* Thu Jan 21 2021 Julien Thierry [1-2.el7] +- Fix TTY pgrp locking in tiocspgrp [1908206] {CVE-2020-29661} + * Fri Oct 30 2020 Julien Thierry [1-1.el7] - xfs: fix boundary test in xfs_attr_shortform_verify [1881413] {CVE-2020-14385}