{"id":"DEBIAN-CVE-2024-39301","details":"In the Linux kernel, the following vulnerability has been resolved:  net/9p: fix uninit-value in p9_client_rpc()  Syzbot with the help of KMSAN reported the following error:  BUG: KMSAN: uninit-value in trace_9p_client_res include/trace/events/9p.h:146 [inline] BUG: KMSAN: uninit-value in p9_client_rpc+0x1314/0x1340 net/9p/client.c:754  trace_9p_client_res include/trace/events/9p.h:146 [inline]  p9_client_rpc+0x1314/0x1340 net/9p/client.c:754  p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031  v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410  v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122  legacy_get_tree+0x114/0x290 fs/fs_context.c:662  vfs_get_tree+0xa7/0x570 fs/super.c:1797  do_new_mount+0x71f/0x15e0 fs/namespace.c:3352  path_mount+0x742/0x1f20 fs/namespace.c:3679  do_mount fs/namespace.c:3692 [inline]  __do_sys_mount fs/namespace.c:3898 [inline]  __se_sys_mount+0x725/0x810 fs/namespace.c:3875  __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875  do_syscall_64+0xd5/0x1f0  entry_SYSCALL_64_after_hwframe+0x6d/0x75  Uninit was created at:  __alloc_pages+0x9d6/0xe70 mm/page_alloc.c:4598  __alloc_pages_node include/linux/gfp.h:238 [inline]  alloc_pages_node include/linux/gfp.h:261 [inline]  alloc_slab_page mm/slub.c:2175 [inline]  allocate_slab mm/slub.c:2338 [inline]  new_slab+0x2de/0x1400 mm/slub.c:2391  ___slab_alloc+0x1184/0x33d0 mm/slub.c:3525  __slab_alloc mm/slub.c:3610 [inline]  __slab_alloc_node mm/slub.c:3663 [inline]  slab_alloc_node mm/slub.c:3835 [inline]  kmem_cache_alloc+0x6d3/0xbe0 mm/slub.c:3852  p9_tag_alloc net/9p/client.c:278 [inline]  p9_client_prepare_req+0x20a/0x1770 net/9p/client.c:641  p9_client_rpc+0x27e/0x1340 net/9p/client.c:688  p9_client_create+0x1551/0x1ff0 net/9p/client.c:1031  v9fs_session_init+0x1b9/0x28e0 fs/9p/v9fs.c:410  v9fs_mount+0xe2/0x12b0 fs/9p/vfs_super.c:122  legacy_get_tree+0x114/0x290 fs/fs_context.c:662  vfs_get_tree+0xa7/0x570 fs/super.c:1797  do_new_mount+0x71f/0x15e0 fs/namespace.c:3352  path_mount+0x742/0x1f20 fs/namespace.c:3679  do_mount fs/namespace.c:3692 [inline]  __do_sys_mount fs/namespace.c:3898 [inline]  __se_sys_mount+0x725/0x810 fs/namespace.c:3875  __x64_sys_mount+0xe4/0x150 fs/namespace.c:3875  do_syscall_64+0xd5/0x1f0  entry_SYSCALL_64_after_hwframe+0x6d/0x75  If p9_check_errors() fails early in p9_client_rpc(), req-\u003erc.tag will not be properly initialized. However, trace_9p_client_res() ends up trying to print it out anyway before p9_client_rpc() finishes.  Fix this issue by assigning default values to p9_fcall fields such as 'tag' and (just in case KMSAN unearths something new) 'id' during the tag allocation stage.","modified":"2026-09-15T09:02:43.511241627Z","published":"2024-06-25T15:15:14.240Z","upstream":["CVE-2024-39301"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-39301"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.94-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-39301.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-39301.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.9.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-39301.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}