From: Chris Webb <chris@arachsys.com> To: qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: Another VNC crash, qemu-kvm-0.12.3 Date: Mon, 1 Mar 2010 18:14:17 +0000 [thread overview] Message-ID: <20100301181416.GB15908@arachsys.com> (raw) In-Reply-To: <4B82F8ED.6000303@codemonkey.ws> We've just seen another VNC related qemu-kvm crash, this time an arithmetic exception at vnc.c:1424 in the newly release qemu-kvm 0.12.3. [...] 1423 if (vs->absolute) { 1424 kbd_mouse_event(x * 0x7FFF / (ds_get_width(vs->ds) - 1), 1425 y * 0x7FFF / (ds_get_height(vs->ds) - 1), 1426 dz, buttons); 1427 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) { 1428 x -= 0x7FFF; [...] and sure enough: (gdb) p vs->ds->surface->width $1 = 9 (gdb) p vs->ds->surface->height $2 = 1 What a 9x1 display surface is doing on this guest is a mystery to me, but you definitely can't divide by one less than its height! (gdb) p *vs $3 = {csock = 19, ds = 0x1c60fa0, dirty = {{4294967295, 4294967295, 4294967295, 4294967295, 4294967295} <repeats 2048 times>}, vd = 0x26a0110, need_update = 1, force_update = 0, features = 67, absolute = 1, last_x = -1, last_y = -1, vnc_encoding = 5, tight_quality = 9 '\t', tight_compression = 9 '\t', major = 3, minor = 8, challenge = "¹{\177\226\200kÕjéPñÄA¤o)", output = {capacity = 925115, offset = 0, buffer = 0x28ba4b0 ""}, input = {capacity = 5120, offset = 6, buffer = 0x28b90a0 "\005"}, write_pixels = 0x4bb9e0 <vnc_write_pixels_generic>, send_hextile_tile = 0x4bcdf0 <send_hextile_tile_generic_32>, clientds = {flags = 0 '\0', width = 800, height = 600, linesize = 3200, data = 0x7fcd00ab6010 "", pf = { bits_per_pixel = 32 ' ', bytes_per_pixel = 4 '\004', depth = 24 '\030', rmask = 0, gmask = 0, bmask = 0, amask = 0, rshift = 16 '\020', gshift = 8 '\b', bshift = 0 '\0', ashift = 24 '\030', rmax = 255 'ÿ', gmax = 255 'ÿ', bmax = 255 'ÿ', amax = 255 'ÿ', rbits = 8 '\b', gbits = 8 '\b', bbits = 8 '\b', abits = 8 '\b'}}, audio_cap = 0x0, as = {freq = 44100, nchannels = 2, fmt = AUD_FMT_S16, endianness = 0}, read_handler = 0x4beac0 <protocol_client_msg>, read_handler_expect = 6, modifiers_state = '\0' <repeats 255 times>, zlib = {capacity = 0, offset = 0, buffer = 0x0}, zlib_tmp = {capacity = 0, offset = 0, buffer = 0x0}, zlib_stream = {{next_in = 0x0, avail_in = 0, total_in = 0, next_out = 0x0, avail_out = 0, total_out = 0, msg = 0x0, state = 0x0, zalloc = 0, zfree = 0, opaque = 0x0, data_type = 0, adler = 0, reserved = 0}, {next_in = 0x0, avail_in = 0, total_in = 0, next_out = 0x0, avail_out = 0, total_out = 0, msg = 0x0, state = 0x0, zalloc = 0, zfree = 0, opaque = 0x0, data_type = 0, adler = 0, reserved = 0}, {next_in = 0x0, avail_in = 0, total_in = 0, next_out = 0x0, avail_out = 0, total_out = 0, msg = 0x0, state = 0x0, zalloc = 0, zfree = 0, opaque = 0x0, data_type = 0, adler = 0, reserved = 0}, {next_in = 0x0, avail_in = 0, total_in = 0, next_out = 0x0, avail_out = 0, total_out = 0, msg = 0x0, state = 0x0, zalloc = 0, zfree = 0, opaque = 0x0, data_type = 0, adler = 0, reserved = 0}}, next = 0x0} (gdb) p *vs->ds $4 = {surface = 0x1c81f40, opaque = 0x26a0110, gui_timer = 0x0, allocator = 0x8199d0, listeners = 0x1c95fa0, mouse_set = 0, cursor_define = 0, next = 0x0} (gdb) p *vs->ds->surface $5 = {flags = 2 '\002', width = 9, height = 1, linesize = 36, data = 0x7fcd00ab6010 "", pf = { bits_per_pixel = 32 ' ', bytes_per_pixel = 4 '\004', depth = 24 '\030', rmask = 16711680, gmask = 65280, bmask = 255, amask = 0, rshift = 16 '\020', gshift = 8 '\b', bshift = 0 '\0', ashift = 24 '\030', rmax = 255 'ÿ', gmax = 255 'ÿ', bmax = 255 'ÿ', amax = 255 'ÿ', rbits = 8 '\b', gbits = 8 '\b', bbits = 8 '\b', abits = 8 '\b'}} Cheers, Chris.
WARNING: multiple messages have this Message-ID (diff)
From: Chris Webb <chris@arachsys.com> To: qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: [Qemu-devel] Another VNC crash, qemu-kvm-0.12.3 Date: Mon, 1 Mar 2010 18:14:17 +0000 [thread overview] Message-ID: <20100301181416.GB15908@arachsys.com> (raw) In-Reply-To: <4B82F8ED.6000303@codemonkey.ws> We've just seen another VNC related qemu-kvm crash, this time an arithmetic exception at vnc.c:1424 in the newly release qemu-kvm 0.12.3. [...] 1423 if (vs->absolute) { 1424 kbd_mouse_event(x * 0x7FFF / (ds_get_width(vs->ds) - 1), 1425 y * 0x7FFF / (ds_get_height(vs->ds) - 1), 1426 dz, buttons); 1427 } else if (vnc_has_feature(vs, VNC_FEATURE_POINTER_TYPE_CHANGE)) { 1428 x -= 0x7FFF; [...] and sure enough: (gdb) p vs->ds->surface->width $1 = 9 (gdb) p vs->ds->surface->height $2 = 1 What a 9x1 display surface is doing on this guest is a mystery to me, but you definitely can't divide by one less than its height! (gdb) p *vs $3 = {csock = 19, ds = 0x1c60fa0, dirty = {{4294967295, 4294967295, 4294967295, 4294967295, 4294967295} <repeats 2048 times>}, vd = 0x26a0110, need_update = 1, force_update = 0, features = 67, absolute = 1, last_x = -1, last_y = -1, vnc_encoding = 5, tight_quality = 9 '\t', tight_compression = 9 '\t', major = 3, minor = 8, challenge = "¹{\177\226\200kÕjéPñÄA¤o)", output = {capacity = 925115, offset = 0, buffer = 0x28ba4b0 ""}, input = {capacity = 5120, offset = 6, buffer = 0x28b90a0 "\005"}, write_pixels = 0x4bb9e0 <vnc_write_pixels_generic>, send_hextile_tile = 0x4bcdf0 <send_hextile_tile_generic_32>, clientds = {flags = 0 '\0', width = 800, height = 600, linesize = 3200, data = 0x7fcd00ab6010 "", pf = { bits_per_pixel = 32 ' ', bytes_per_pixel = 4 '\004', depth = 24 '\030', rmask = 0, gmask = 0, bmask = 0, amask = 0, rshift = 16 '\020', gshift = 8 '\b', bshift = 0 '\0', ashift = 24 '\030', rmax = 255 'ÿ', gmax = 255 'ÿ', bmax = 255 'ÿ', amax = 255 'ÿ', rbits = 8 '\b', gbits = 8 '\b', bbits = 8 '\b', abits = 8 '\b'}}, audio_cap = 0x0, as = {freq = 44100, nchannels = 2, fmt = AUD_FMT_S16, endianness = 0}, read_handler = 0x4beac0 <protocol_client_msg>, read_handler_expect = 6, modifiers_state = '\0' <repeats 255 times>, zlib = {capacity = 0, offset = 0, buffer = 0x0}, zlib_tmp = {capacity = 0, offset = 0, buffer = 0x0}, zlib_stream = {{next_in = 0x0, avail_in = 0, total_in = 0, next_out = 0x0, avail_out = 0, total_out = 0, msg = 0x0, state = 0x0, zalloc = 0, zfree = 0, opaque = 0x0, data_type = 0, adler = 0, reserved = 0}, {next_in = 0x0, avail_in = 0, total_in = 0, next_out = 0x0, avail_out = 0, total_out = 0, msg = 0x0, state = 0x0, zalloc = 0, zfree = 0, opaque = 0x0, data_type = 0, adler = 0, reserved = 0}, {next_in = 0x0, avail_in = 0, total_in = 0, next_out = 0x0, avail_out = 0, total_out = 0, msg = 0x0, state = 0x0, zalloc = 0, zfree = 0, opaque = 0x0, data_type = 0, adler = 0, reserved = 0}, {next_in = 0x0, avail_in = 0, total_in = 0, next_out = 0x0, avail_out = 0, total_out = 0, msg = 0x0, state = 0x0, zalloc = 0, zfree = 0, opaque = 0x0, data_type = 0, adler = 0, reserved = 0}}, next = 0x0} (gdb) p *vs->ds $4 = {surface = 0x1c81f40, opaque = 0x26a0110, gui_timer = 0x0, allocator = 0x8199d0, listeners = 0x1c95fa0, mouse_set = 0, cursor_define = 0, next = 0x0} (gdb) p *vs->ds->surface $5 = {flags = 2 '\002', width = 9, height = 1, linesize = 36, data = 0x7fcd00ab6010 "", pf = { bits_per_pixel = 32 ' ', bytes_per_pixel = 4 '\004', depth = 24 '\030', rmask = 16711680, gmask = 65280, bmask = 255, amask = 0, rshift = 16 '\020', gshift = 8 '\b', bshift = 0 '\0', ashift = 24 '\030', rmax = 255 'ÿ', gmax = 255 'ÿ', bmax = 255 'ÿ', amax = 255 'ÿ', rbits = 8 '\b', gbits = 8 '\b', bbits = 8 '\b', abits = 8 '\b'}} Cheers, Chris.
next prev parent reply other threads:[~2010-03-01 18:14 UTC|newest] Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-02-21 17:23 [Qemu-devel] qemu-kvm 0.12.2 VNC segfault Chris Webb 2010-02-22 8:54 ` Avi Kivity 2010-02-22 8:54 ` [Qemu-devel] " Avi Kivity 2010-02-22 19:06 ` Chris Webb 2010-02-22 21:36 ` Anthony Liguori 2010-02-22 21:36 ` [Qemu-devel] " Anthony Liguori 2010-03-01 18:14 ` Chris Webb [this message] 2010-03-01 18:14 ` [Qemu-devel] Another VNC crash, qemu-kvm-0.12.3 Chris Webb 2010-03-03 14:23 ` Anthony Liguori 2010-03-03 14:23 ` [Qemu-devel] " Anthony Liguori 2010-03-05 16:52 ` Chris Webb 2010-03-05 16:52 ` [Qemu-devel] " Chris Webb 2010-03-05 19:57 ` Alexander Graf 2010-03-05 19:57 ` Alexander Graf 2010-03-06 8:53 ` Chris Webb 2010-03-06 8:53 ` Chris Webb 2010-03-08 14:34 ` [PATCH] Fix SIGFPE for vnc display of width/height = 1 Chris Webb 2010-03-08 14:34 ` [Qemu-devel] " Chris Webb 2010-03-08 18:15 ` Chris Webb 2010-03-17 15:59 ` Anthony Liguori 2010-03-17 16:55 ` Alexander Graf
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