From b069256b11fc7070dd6a4e750e268bcfd8aaa114 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Fri, 8 Mar 2019 13:45:28 +0100 Subject: [PATCH] 4.14-stable patches added patches: exec-fix-mem-leak-in-kernel_read_file.patch scsi-core-reset-host-byte-in-did_nexus_failure-case.patch --- ...xec-fix-mem-leak-in-kernel_read_file.patch | 51 +++++++++++++++++++ ...-host-byte-in-did_nexus_failure-case.patch | 42 +++++++++++++++ queue-4.14/series | 2 + 3 files changed, 95 insertions(+) create mode 100644 queue-4.14/exec-fix-mem-leak-in-kernel_read_file.patch create mode 100644 queue-4.14/scsi-core-reset-host-byte-in-did_nexus_failure-case.patch diff --git a/queue-4.14/exec-fix-mem-leak-in-kernel_read_file.patch b/queue-4.14/exec-fix-mem-leak-in-kernel_read_file.patch new file mode 100644 index 00000000000..7c4997343c4 --- /dev/null +++ b/queue-4.14/exec-fix-mem-leak-in-kernel_read_file.patch @@ -0,0 +1,51 @@ +From f612acfae86af7ecad754ae6a46019be9da05b8e Mon Sep 17 00:00:00 2001 +From: YueHaibing +Date: Tue, 19 Feb 2019 10:10:38 +0800 +Subject: exec: Fix mem leak in kernel_read_file + +From: YueHaibing + +commit f612acfae86af7ecad754ae6a46019be9da05b8e upstream. + +syzkaller report this: +BUG: memory leak +unreferenced object 0xffffc9000488d000 (size 9195520): + comm "syz-executor.0", pid 2752, jiffies 4294787496 (age 18.757s) + hex dump (first 32 bytes): + ff ff ff ff ff ff ff ff a8 00 00 00 01 00 00 00 ................ + 02 00 00 00 00 00 00 00 80 a1 7a c1 ff ff ff ff ..........z..... + backtrace: + [<000000000863775c>] __vmalloc_node mm/vmalloc.c:1795 [inline] + [<000000000863775c>] __vmalloc_node_flags mm/vmalloc.c:1809 [inline] + [<000000000863775c>] vmalloc+0x8c/0xb0 mm/vmalloc.c:1831 + [<000000003f668111>] kernel_read_file+0x58f/0x7d0 fs/exec.c:924 + [<000000002385813f>] kernel_read_file_from_fd+0x49/0x80 fs/exec.c:993 + [<0000000011953ff1>] __do_sys_finit_module+0x13b/0x2a0 kernel/module.c:3895 + [<000000006f58491f>] do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290 + [<00000000ee78baf4>] entry_SYSCALL_64_after_hwframe+0x49/0xbe + [<00000000241f889b>] 0xffffffffffffffff + +It should goto 'out_free' lable to free allocated buf while kernel_read +fails. + +Fixes: 39d637af5aa7 ("vfs: forbid write access when reading a file into memory") +Signed-off-by: YueHaibing +Signed-off-by: Al Viro +Cc: Thibaut Sautereau +Signed-off-by: Greg Kroah-Hartman + +--- + fs/exec.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/fs/exec.c ++++ b/fs/exec.c +@@ -925,7 +925,7 @@ int kernel_read_file(struct file *file, + bytes = kernel_read(file, *buf + pos, i_size - pos, &pos); + if (bytes < 0) { + ret = bytes; +- goto out; ++ goto out_free; + } + + if (bytes == 0) diff --git a/queue-4.14/scsi-core-reset-host-byte-in-did_nexus_failure-case.patch b/queue-4.14/scsi-core-reset-host-byte-in-did_nexus_failure-case.patch new file mode 100644 index 00000000000..a5c15bd36fc --- /dev/null +++ b/queue-4.14/scsi-core-reset-host-byte-in-did_nexus_failure-case.patch @@ -0,0 +1,42 @@ +From 4a067cf823d9d8e50d41cfb618011c0d4a969c72 Mon Sep 17 00:00:00 2001 +From: Martin Wilck +Date: Thu, 14 Feb 2019 22:57:41 +0100 +Subject: scsi: core: reset host byte in DID_NEXUS_FAILURE case + +From: Martin Wilck + +commit 4a067cf823d9d8e50d41cfb618011c0d4a969c72 upstream. + +Up to 4.12, __scsi_error_from_host_byte() would reset the host byte to +DID_OK for various cases including DID_NEXUS_FAILURE. Commit +2a842acab109 ("block: introduce new block status code type") replaced this +function with scsi_result_to_blk_status() and removed the host-byte +resetting code for the DID_NEXUS_FAILURE case. As the line +set_host_byte(cmd, DID_OK) was preserved for the other cases, I suppose +this was an editing mistake. + +The fact that the host byte remains set after 4.13 is causing problems with +the sg_persist tool, which now returns success rather then exit status 24 +when a RESERVATION CONFLICT error is encountered. + +Fixes: 2a842acab109 "block: introduce new block status code type" +Signed-off-by: Martin Wilck +Reviewed-by: Hannes Reinecke +Reviewed-by: Christoph Hellwig +Signed-off-by: Martin K. Petersen +Signed-off-by: Greg Kroah-Hartman + +--- + drivers/scsi/scsi_lib.c | 1 + + 1 file changed, 1 insertion(+) + +--- a/drivers/scsi/scsi_lib.c ++++ b/drivers/scsi/scsi_lib.c +@@ -734,6 +734,7 @@ static blk_status_t __scsi_error_from_ho + set_host_byte(cmd, DID_OK); + return BLK_STS_TARGET; + case DID_NEXUS_FAILURE: ++ set_host_byte(cmd, DID_OK); + return BLK_STS_NEXUS; + case DID_ALLOC_FAILURE: + set_host_byte(cmd, DID_OK); diff --git a/queue-4.14/series b/queue-4.14/series index 2cde9781563..e7133391706 100644 --- a/queue-4.14/series +++ b/queue-4.14/series @@ -38,3 +38,5 @@ mips-irq-allocate-accurate-order-pages-for-irq-stack.patch hugetlbfs-fix-races-and-page-leaks-during-migration.patch xtensa-fix-get_wchan.patch bluetooth-fix-locking-in-bt_accept_enqueue-for-bh-context.patch +exec-fix-mem-leak-in-kernel_read_file.patch +scsi-core-reset-host-byte-in-did_nexus_failure-case.patch -- 2.47.2