"value":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: uncache inode which has failed entering the group\n\nSyzbot has reported the following BUG:\n\nkernel BUG at fs/ocfs2/uptodate.c:509!\n...\nCall Trace:\n <TASK>\n ? __die_body+0x5f/0xb0\n ? die+0x9e/0xc0\n ? do_trap+0x15a/0x3a0\n ? ocfs2_set_new_buffer_uptodate+0x145/0x160\n ? do_error_trap+0x1dc/0x2c0\n ? ocfs2_set_new_buffer_uptodate+0x145/0x160\n ? __pfx_do_error_trap+0x10/0x10\n ? handle_invalid_op+0x34/0x40\n ? ocfs2_set_new_buffer_uptodate+0x145/0x160\n ? exc_invalid_op+0x38/0x50\n ? asm_exc_invalid_op+0x1a/0x20\n ? ocfs2_set_new_buffer_uptodate+0x2e/0x160\n ? ocfs2_set_new_buffer_uptodate+0x144/0x160\n ? ocfs2_set_new_buffer_uptodate+0x145/0x160\n ocfs2_group_add+0x39f/0x15a0\n ? __pfx_ocfs2_group_add+0x10/0x10\n ? __pfx_lock_acquire+0x10/0x10\n ? mnt_get_write_access+0x68/0x2b0\n ? __pfx_lock_release+0x10/0x10\n ? rcu_read_lock_any_held+0xb7/0x160\n ? __pfx_rcu_read_lock_any_held+0x10/0x10\n ? smack_log+0x123/0x540\n ? mnt_get_write_access+0x68/0x2b0\n ? mnt_get_write_access+0x68/0x2b0\n ? mnt_get_write_access+0x226/0x2b0\n ocfs2_ioctl+0x65e/0x7d0\n ? __pfx_ocfs2_ioctl+0x10/0x10\n ? smack_file_ioctl+0x29e/0x3a0\n ? __pfx_smack_file_ioctl+0x10/0x10\n ? lockdep_hardirqs_on_prepare+0x43d/0x780\n ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10\n ? __pfx_ocfs2_ioctl+0x10/0x10\n __se_sys_ioctl+0xfb/0x170\n do_syscall_64+0xf3/0x230\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n...\n </TASK>\n\nWhen 'ioctl(OCFS2_IOC_GROUP_ADD, ...)' has failed for the particular\ninode in 'ocfs2_verify_group_and_input()', corresponding buffer head\nremains cached and subsequent call to the same 'ioctl()' for the same\ninode issues the BUG() in 'ocfs2_set_new_buffer_uptodate()' (trying\nto cache the same buffer head of that inode). Fix this by uncaching\nthe buffer head with 'ocfs2_remove_from_cache()' on error path in\n'ocfs2_group_add()'."
"value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ocfs2: anular la cach\u00e9 de un nodo que no ha podido entrar en el grupo Syzbot ha informado del siguiente ERROR: ERROR del kernel en fs/ocfs2/uptodate.c:509! ... Seguimiento de llamadas: ? __die_body+0x5f/0xb0 ? die+0x9e/0xc0 ? do_trap+0x15a/0x3a0 ? ocfs2_set_new_buffer_uptodate+0x145/0x160 ? do_error_trap+0x1dc/0x2c0 ? ocfs2_set_new_buffer_uptodate+0x145/0x160 ? __pfx_do_error_trap+0x10/0x10 ? handle_invalid_op+0x34/0x40 ? ocfs2_set_new_buffer_uptodate+0x145/0x160 ? exc_invalid_op+0x38/0x50 ? asm_exc_invalid_op+0x1a/0x20 ? ocfs2_set_new_buffer_uptodate+0x2e/0x160 ? ocfs2_set_new_buffer_uptodate+0x144/0x160 ? ocfs2_set_new_buffer_uptodate+0x145/0x160 ocfs2_group_add+0x39f/0x15a0 ? __pfx_ocfs2_group_add+0x10/0x10 ? __pfx_lock_acquire+0x10/0x10 ? __pfx_ocfs2_ioctl+0x65e/0x7d0 ? __pfx_smack_file_ioctl+0x29e/0x3a0 ? __pfx_smack_file_ioctl+0x10/0x10 ? bloqueo_dep_hardirqs_en_preparar+0x43d/0x780 ? lockdep_hardirqs_on_prepare+0x10/0x10 ? __pfx_ocfs2_ioctl+0x10/0x10 __se_sys_ioctl+0xfb/0x170 do_syscall_64+0xf3/0x230 entry_SYSCALL_64_after_hwframe+0x77/0x7f ... Cuando 'ioctl(OCFS2_IOC_GROUP_ADD, ...)' ha fallado para el inodo particular en 'ocfs2_verify_group_and_input()', el cabezal de b\u00fafer correspondiente permanece en cach\u00e9 y la llamada posterior al mismo 'ioctl()' para el mismo inodo emite el BUG() en 'ocfs2_set_new_buffer_uptodate()' (intentando almacenar en cach\u00e9 el mismo cabezal de b\u00fafer de ese inodo). Solucione este problema quitando el cach\u00e9 del encabezado del b\u00fafer con 'ocfs2_remove_from_cache()' en la ruta de error en 'ocfs2_group_add()'."