Blame patches.suse/block-scsi-ioctl-Fix-kernel-infoleak-in-scsi_put_cdr.patch
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From: Peilin Ye <yepeilin.cs@gmail.com>
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Date: Fri, 2 Oct 2020 10:22:23 -0400
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Subject: [PATCH] block/scsi-ioctl: Fix kernel-infoleak in
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scsi_put_cdrom_generic_arg()
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Git-commit: 6d53a9fe5a1983490bc14b3a64d49fabb4ccc651
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Patch-mainline: v5.9-rc1
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References: git-fixes
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scsi_put_cdrom_generic_arg() is copying uninitialized stack memory to
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userspace, since the compiler may leave a 3-byte hole in the middle of
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`cgc32`. Fix it by adding a padding field to `struct
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compat_cdrom_generic_command`.
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Cc: stable@vger.kernel.org
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Fixes: f3ee6e63a9df ("compat_ioctl: move CDROM_SEND_PACKET handling into scsi")
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Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
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Suggested-by: Arnd Bergmann <arnd@arndb.de>
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Reported-by: syzbot+85433a479a646a064ab3@syzkaller.appspotmail.com
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Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
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Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Acked-by: Hannes Reinecke <hare@suse.com>
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---
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block/scsi_ioctl.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
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index ef722f04f88a..72108404718f 100644
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--- a/block/scsi_ioctl.c
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+++ b/block/scsi_ioctl.c
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@@ -651,6 +651,7 @@ struct compat_cdrom_generic_command {
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compat_int_t stat;
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compat_caddr_t sense;
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unsigned char data_direction;
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+ unsigned char pad[3];
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compat_int_t quiet;
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compat_int_t timeout;
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compat_caddr_t reserved[1];
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--
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2.29.2
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