From: Dongxing Zhang <dongxing.zh...@intel.com> If vc->vc_uni_pagedir_loc is not NULL, its refcount needs to be decreased before vc_uni_pagedir_loc is re-assigned.
unreferenced object 0xffff88002cdd13b0 (size 512): comm "setfont", pid 503, jiffies 4294896503 (age 722.828s) hex dump (first 32 bytes): 40 92 61 2b 00 88 ff ff 00 00 00 00 00 00 00 00 @.a+............ 00 00 00 00 00 00 00 00 a0 ad 61 2b 00 88 ff ff ..........a+.... backtrace: [<ffffffff817b755e>] kmemleak_alloc+0x4e/0xb0 [<ffffffff811d4898>] kmem_cache_alloc_trace+0x1c8/0x240 [<ffffffff814ae7d3>] con_do_clear_unimap.isra.2+0x83/0xe0 [<ffffffff814ae9b2>] con_clear_unimap+0x22/0x40 [<ffffffff814a8db8>] vt_ioctl+0xeb8/0x1170 [<ffffffff8149b458>] tty_ioctl+0x208/0xca0 [<ffffffff81207858>] do_vfs_ioctl+0x2f8/0x510 [<ffffffff81207af1>] SyS_ioctl+0x81/0xa0 [<ffffffff817ca2b2>] system_call_fastpath+0x16/0x75 [<ffffffffffffffff>] 0xffffffffffffffff unreferenced object 0xffff88002b619240 (size 256): comm "setfont", pid 503, jiffies 4294896503 (age 722.828s) hex dump (first 32 bytes): 90 bc 84 d5 00 88 ff ff 58 85 84 d5 00 88 ff ff ........X....... 88 ac 84 d5 00 88 ff ff e0 b1 84 d5 00 88 ff ff ................ backtrace: [<ffffffff817b755e>] kmemleak_alloc+0x4e/0xb0 [<ffffffff811d4898>] kmem_cache_alloc_trace+0x1c8/0x240 [<ffffffff814ae286>] con_insert_unipair+0x86/0x170 [<ffffffff814af107>] con_set_unimap+0x1b7/0x280 [<ffffffff814a8d65>] vt_ioctl+0xe65/0x1170 [<ffffffff8149b458>] tty_ioctl+0x208/0xca0 [<ffffffff81207858>] do_vfs_ioctl+0x2f8/0x510 [<ffffffff81207af1>] SyS_ioctl+0x81/0xa0 [<ffffffff817ca2b2>] system_call_fastpath+0x16/0x75 [<ffffffffffffffff>] 0xffffffffffffffff Signed-off-by: Dongxing Zhang <dongxing.zh...@intel.com> Signed-off-by: Xiaoming Wang <xiaoming.w...@intel.com> Reviewed-by: Peter Hurley <pe...@hurleysoftware.com> Tested-by: Konstantin Khlebnikov <khlebni...@yandex-team.ru> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> https://jira.sw.ru/browse/PSBM-76924 (cherry picked from commit 08b33249d89700ba555d4ab5cc88714192b8ee46) Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> --- drivers/tty/vt/vt.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 07c5666c2c30..fbc6290e417a 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -742,6 +742,8 @@ static void visual_init(struct vc_data *vc, int num, int init) __module_get(vc->vc_sw->owner); vc->vc_num = num; vc->vc_display_fg = &master_display_fg; + if (vc->vc_uni_pagedir_loc) + con_free_unimap(vc); vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; vc->vc_uni_pagedir = 0; vc->vc_hi_font_mask = 0; -- 2.13.6 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel