cve-2024-38588
Vulnerability from cvelistv5
Published
2024-06-19 13:37
Modified
2024-11-17 15:02
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
ftrace: Fix possible use-after-free issue in ftrace_location()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1880a324af1c95940a7c954b6b937e86844a33bd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/31310e373f4c8c74e029d4326b283e757edabc0bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/66df065b3106964e667b37bf8f7e55ec69d0c1f6Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7b4881da5b19f65709f5c18c1a4d8caa2e496461Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8ea8ef5e42173560ac510e92a1cc797ffeea8831Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dbff5f0bfb2416b8b55c105ddbcd4f885e98fadaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e60b613df8b6253def41215402f72986fee3fc8dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eea46baf145150910ba134f75a67106ba2222c1b
Impacted products
Vendor Product Version
Linux Linux Version: 3.7
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix possible use-after-free issue in ftrace_location()\n\nKASAN reports a bug:\n\n  BUG: KASAN: use-after-free in ftrace_location+0x90/0x120\n  Read of size 8 at addr ffff888141d40010 by task insmod/424\n  CPU: 8 PID: 424 Comm: insmod Tainted: G        W          6.9.0-rc2+\n  [...]\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x68/0xa0\n   print_report+0xcf/0x610\n   kasan_report+0xb5/0xe0\n   ftrace_location+0x90/0x120\n   register_kprobe+0x14b/0xa40\n   kprobe_init+0x2d/0xff0 [kprobe_example]\n   do_one_initcall+0x8f/0x2d0\n   do_init_module+0x13a/0x3c0\n   load_module+0x3082/0x33d0\n   init_module_from_file+0xd2/0x130\n   __x64_sys_finit_module+0x306/0x440\n   do_syscall_64+0x68/0x140\n   entry_SYSCALL_64_after_hwframe+0x71/0x79\n\nThe root cause is that, in lookup_rec(), ftrace record of some address\nis being searched in ftrace pages of some module, but those ftrace pages\nat the same time is being freed in ftrace_release_mod() as the\ncorresponding module is being deleted:\n\n           CPU1                       |      CPU2\n  register_kprobes() {                | delete_module() {\n    check_kprobe_address_safe() {     |\n      arch_check_ftrace_location() {  |\n        ftrace_location() {           |\n          lookup_rec() // USE!        |   ftrace_release_mod() // Free!\n\nTo fix this issue:\n  1. Hold rcu lock as accessing ftrace pages in ftrace_location_range();\n  2. Use ftrace_location_range() instead of lookup_rec() in\n     ftrace_location();\n  3. Call synchronize_rcu() before freeing any ftrace pages both in\n     ftrace_process_locs()/ftrace_release_mod()/ftrace_free_mem()."
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    "dateReserved": "2024-06-18T19:36:34.929Z",
    "dateUpdated": "2024-11-17T15:02:40.383Z",
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Hold rcu lock as accessing ftrace pages in ftrace_location_range();\\n  2. Use ftrace_location_range() instead of lookup_rec() in\\n     ftrace_location();\\n  3. Call synchronize_rcu() before freeing any ftrace pages both in\\n     ftrace_process_locs()/ftrace_release_mod()/ftrace_free_mem().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ftrace: Solucionar posible problema de use-after-free en ftrace_location() KASAN informa un error: ERROR: KASAN: use-after-free en ftrace_location+0x90/0x120 Lectura de tama\u00f1o 8 en addr ffff888141d40010 por tarea insmod/424 CPU: 8 PID: 424 Comm: insmod Tainted: GW 6.9.0-rc2+ [...] Rastreo de llamadas:  dump_stack_lvl+0x68/0xa0 print_report+0xcf/0x610 kasan_report+0xb5/ 0xe0 ftrace_location+0x90/0x120 Register_kprobe+0x14b/0xa40 kprobe_init+0x2d/0xff0 [kprobe_example] do_one_initcall+0x8f/0x2d0 do_init_module+0x13a/0x3c0 load_module+0x3082/0x33d0 init_module_from _file+0xd2/0x130 __x64_sys_finit_module+0x306/0x440 do_syscall_64+0x68/0x140 entrada_SYSCALL_64_after_hwframe +0x71/0x79 La causa principal es que, en lookup_rec(), el registro ftrace de alguna direcci\u00f3n se busca en las p\u00e1ginas ftrace de alg\u00fan m\u00f3dulo, pero esas p\u00e1ginas ftrace al mismo tiempo se liberan en ftrace_release_mod() como lo est\u00e1 el m\u00f3dulo correspondiente. siendo eliminado: CPU1 | CPU2 registro_kprobes() { | eliminar_m\u00f3dulo() { check_kprobe_address_safe() { | arch_check_ftrace_location() { | ftrace_ubicaci\u00f3n() { | lookup_rec() // \u00a1UTILIZAR! | ftrace_release_mod() // \u00a1Gratis! Para solucionar este problema: 1. Mantenga presionado rcu lock mientras accede a las p\u00e1ginas de ftrace en ftrace_location_range(); 2. Utilice ftrace_location_range() en lugar de lookup_rec() en ftrace_location(); 3. 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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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