{"id":"CVE-2024-43862","summary":"net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex\n\nThe carrier_lock spinlock protects the carrier detection. While it is\nheld, framer_get_status() is called which in turn takes a mutex.\nThis is not correct and can lead to a deadlock.\n\nA run with PROVE_LOCKING enabled detected the issue:\n  [ BUG: Invalid wait context ]\n  ...\n  c204ddbc (&framer-\u003emutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78\n  other info that might help us debug this:\n  context-{4:4}\n  2 locks held by ifconfig/146:\n  #0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664\n  #1: c2006a40 (&qmc_hdlc-\u003ecarrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98\n\nAvoid the spinlock usage and convert carrier_lock to a mutex.","modified":"2026-08-12T03:51:19.691484600Z","published":"2024-08-20T23:45:26.643Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43862.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/c4d6a347ba7babdf9d90a0eb24048c266cae0532"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43862.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-43862"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"54762918ca856028d33d1d56d017a4d7706c6196"},{"fixed":"f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9"},{"fixed":"c4d6a347ba7babdf9d90a0eb24048c266cae0532"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43862.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.10.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43862.json"}}],"schema_version":"1.9.0"}