{ "containers": { "cna": { "providerMetadata": { "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/fbdev-dma: Only cleanup deferred I/O if necessary\n\nCommit 5a498d4d06d6 (\"drm/fbdev-dma: Only install deferred I/O if\nnecessary\") initializes deferred I/O only if it is used.\ndrm_fbdev_dma_fb_destroy() however calls fb_deferred_io_cleanup()\nunconditionally with struct fb_info.fbdefio == NULL. KASAN with the\nout-of-tree Apple silicon display driver posts following warning from\n__flush_work() of a random struct work_struct instead of the expected\nNULL pointer derefs.\n\n[ 22.053799] ------------[ cut here ]------------\n[ 22.054832] WARNING: CPU: 2 PID: 1 at kernel/workqueue.c:4177 __flush_work+0x4d8/0x580\n[ 22.056597] Modules linked in: uhid bnep uinput nls_ascii ip6_tables ip_tables i2c_dev loop fuse dm_multipath nfnetlink zram hid_magicmouse btrfs xor xor_neon brcmfmac_wcc raid6_pq hci_bcm4377 bluetooth brcmfmac hid_apple brcmutil nvmem_spmi_mfd simple_mfd_spmi dockchannel_hid cfg80211 joydev regmap_spmi nvme_apple ecdh_generic ecc macsmc_hid rfkill dwc3 appledrm snd_soc_macaudio macsmc_power nvme_core apple_isp phy_apple_atc apple_sart apple_rtkit_helper apple_dockchannel tps6598x macsmc_hwmon snd_soc_cs42l84 videobuf2_v4l2 spmi_apple_controller nvmem_apple_efuses videobuf2_dma_sg apple_z2 videobuf2_memops spi_nor panel_summit videobuf2_common asahi videodev pwm_apple apple_dcp snd_soc_apple_mca apple_admac spi_apple clk_apple_nco i2c_pasemi_platform snd_pcm_dmaengine mc i2c_pasemi_core mux_core ofpart adpdrm drm_dma_helper apple_dart apple_soc_cpufreq leds_pwm phram\n[ 22.073768] CPU: 2 UID: 0 PID: 1 Comm: systemd-shutdow Not tainted 6.11.2-asahi+ #asahi-dev\n[ 22.075612] Hardware name: Apple MacBook Pro (13-inch, M2, 2022) (DT)\n[ 22.077032] pstate: 01400005 (nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\n[ 22.078567] pc : __flush_work+0x4d8/0x580\n[ 22.079471] lr : __flush_work+0x54/0x580\n[ 22.080345] sp : ffffc000836ef820\n[ 22.081089] x29: ffffc000836ef880 x28: 0000000000000000 x27: ffff80002ddb7128\n[ 22.082678] x26: dfffc00000000000 x25: 1ffff000096f0c57 x24: ffffc00082d3e358\n[ 22.084263] x23: ffff80004b7862b8 x22: dfffc00000000000 x21: ffff80005aa1d470\n[ 22.085855] x20: ffff80004b786000 x19: ffff80004b7862a0 x18: 0000000000000000\n[ 22.087439] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000005\n[ 22.089030] x14: 1ffff800106ddf0a x13: 0000000000000000 x12: 0000000000000000\n[ 22.090618] x11: ffffb800106ddf0f x10: dfffc00000000000 x9 : 1ffff800106ddf0e\n[ 22.092206] x8 : 0000000000000000 x7 : aaaaaaaaaaaaaaaa x6 : 0000000000000001\n[ 22.093790] x5 : ffffc000836ef728 x4 : 0000000000000000 x3 : 0000000000000020\n[ 22.095368] x2 : 0000000000000008 x1 : 00000000000000aa x0 : 0000000000000000\n[ 22.096955] Call trace:\n[ 22.097505] __flush_work+0x4d8/0x580\n[ 22.098330] flush_delayed_work+0x80/0xb8\n[ 22.099231] fb_deferred_io_cleanup+0x3c/0x130\n[ 22.100217] drm_fbdev_dma_fb_destroy+0x6c/0xe0 [drm_dma_helper]\n[ 22.101559] unregister_framebuffer+0x210/0x2f0\n[ 22.102575] drm_fb_helper_unregister_info+0x48/0x60\n[ 22.103683] drm_fbdev_dma_client_unregister+0x4c/0x80 [drm_dma_helper]\n[ 22.105147] drm_client_dev_unregister+0x1cc/0x230\n[ 22.106217] drm_dev_unregister+0x58/0x570\n[ 22.107125] apple_drm_unbind+0x50/0x98 [appledrm]\n[ 22.108199] component_del+0x1f8/0x3a8\n[ 22.109042] dcp_platform_shutdown+0x24/0x38 [apple_dcp]\n[ 22.110357] platform_shutdown+0x70/0x90\n[ 22.111219] device_shutdown+0x368/0x4d8\n[ 22.112095] kernel_restart+0x6c/0x1d0\n[ 22.112946] __arm64_sys_reboot+0x1c8/0x328\n[ 22.113868] invoke_syscall+0x78/0x1a8\n[ 22.114703] do_el0_svc+0x124/0x1a0\n[ 22.115498] el0_svc+0x3c/0xe0\n[ 22.116181] el0t_64_sync_handler+0x70/0xc0\n[ 22.117110] el0t_64_sync+0x190/0x198\n[ 22.117931] ---[ end trace 0000000000000000 ]---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/drm_fbdev_dma.c" ], "versions": [ { "version": "5a498d4d06d6", "lessThan": "5a4a8ea14c54", "status": "affected", "versionType": "git" }, { "version": "5a498d4d06d6", "lessThan": "fcddc71ec7ec", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/gpu/drm/drm_fbdev_dma.c" ], "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "custom" }, { "version": "6.11.4", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.12-rc3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5a4a8ea14c54c651ec532a480bd560d0c6e52f3d" }, { "url": "https://git.kernel.org/stable/c/fcddc71ec7ecf15b4df3c41288c9cf0b8e886111" } ], "title": "drm/fbdev-dma: Only cleanup deferred I/O if necessary", "x_generator": { "engine": "bippy-c9c4e1df01b2" } } }, "cveMetadata": { "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", "cveID": "CVE-2024-50037", "requesterUserId": "gregkh@kernel.org", "serial": "1", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.0" }