| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-52808: scsi: hisi_sas: Set debugfs_dir pointer to NULL after removing debugfs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: hisi_sas: Set debugfs_dir pointer to NULL after removing debugfs |
| |
| If init debugfs failed during device registration due to memory allocation |
| failure, debugfs_remove_recursive() is called, after which debugfs_dir is |
| not set to NULL. debugfs_remove_recursive() will be called again during |
| device removal. As a result, illegal pointer is accessed. |
| |
| [ 1665.467244] hisi_sas_v3_hw 0000:b4:02.0: failed to init debugfs! |
| ... |
| [ 1669.836708] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000a0 |
| [ 1669.872669] pc : down_write+0x24/0x70 |
| [ 1669.876315] lr : down_write+0x1c/0x70 |
| [ 1669.879961] sp : ffff000036f53a30 |
| [ 1669.883260] x29: ffff000036f53a30 x28: ffffa027c31549f8 |
| [ 1669.888547] x27: ffffa027c3140000 x26: 0000000000000000 |
| [ 1669.893834] x25: ffffa027bf37c270 x24: ffffa027bf37c270 |
| [ 1669.899122] x23: ffff0000095406b8 x22: ffff0000095406a8 |
| [ 1669.904408] x21: 0000000000000000 x20: ffffa027bf37c310 |
| [ 1669.909695] x19: 00000000000000a0 x18: ffff8027dcd86f10 |
| [ 1669.914982] x17: 0000000000000000 x16: 0000000000000000 |
| [ 1669.920268] x15: 0000000000000000 x14: ffffa0274014f870 |
| [ 1669.925555] x13: 0000000000000040 x12: 0000000000000228 |
| [ 1669.930842] x11: 0000000000000020 x10: 0000000000000bb0 |
| [ 1669.936129] x9 : ffff000036f537f0 x8 : ffff80273088ca10 |
| [ 1669.941416] x7 : 000000000000001d x6 : 00000000ffffffff |
| [ 1669.946702] x5 : ffff000008a36310 x4 : ffff80273088be00 |
| [ 1669.951989] x3 : ffff000009513e90 x2 : 0000000000000000 |
| [ 1669.957276] x1 : 00000000000000a0 x0 : ffffffff00000001 |
| [ 1669.962563] Call trace: |
| [ 1669.965000] down_write+0x24/0x70 |
| [ 1669.968301] debugfs_remove_recursive+0x5c/0x1b0 |
| [ 1669.972905] hisi_sas_debugfs_exit+0x24/0x30 [hisi_sas_main] |
| [ 1669.978541] hisi_sas_v3_remove+0x130/0x150 [hisi_sas_v3_hw] |
| [ 1669.984175] pci_device_remove+0x48/0xd8 |
| [ 1669.988082] device_release_driver_internal+0x1b4/0x250 |
| [ 1669.993282] device_release_driver+0x28/0x38 |
| [ 1669.997534] pci_stop_bus_device+0x84/0xb8 |
| [ 1670.001611] pci_stop_and_remove_bus_device_locked+0x24/0x40 |
| [ 1670.007244] remove_store+0xfc/0x140 |
| [ 1670.010802] dev_attr_store+0x44/0x60 |
| [ 1670.014448] sysfs_kf_write+0x58/0x80 |
| [ 1670.018095] kernfs_fop_write+0xe8/0x1f0 |
| [ 1670.022000] __vfs_write+0x60/0x190 |
| [ 1670.025472] vfs_write+0xac/0x1c0 |
| [ 1670.028771] ksys_write+0x6c/0xd8 |
| [ 1670.032071] __arm64_sys_write+0x24/0x30 |
| [ 1670.035977] el0_svc_common+0x78/0x130 |
| [ 1670.039710] el0_svc_handler+0x38/0x78 |
| [ 1670.043442] el0_svc+0x8/0xc |
| |
| To fix this, set debugfs_dir to NULL after debugfs_remove_recursive(). |
| |
| The Linux kernel CVE team has assigned CVE-2023-52808 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.5 with commit 47caad1577cd7a39e2048c5e4edbce4b863dc12b and fixed in 5.15.140 with commit f0bfc8a5561fb0b2c48183dcbfe00bdd6d973bd3 |
| Issue introduced in 4.5 with commit 47caad1577cd7a39e2048c5e4edbce4b863dc12b and fixed in 6.1.64 with commit 33331b265aac9441ac0c1a5442e3f05d038240ec |
| Issue introduced in 4.5 with commit 47caad1577cd7a39e2048c5e4edbce4b863dc12b and fixed in 6.5.13 with commit 75a2656260fe8c7eeabda6ff4600b29e183f48db |
| Issue introduced in 4.5 with commit 47caad1577cd7a39e2048c5e4edbce4b863dc12b and fixed in 6.6.3 with commit b4465009e7d60c6111946db4c8f1e50d401ed7be |
| Issue introduced in 4.5 with commit 47caad1577cd7a39e2048c5e4edbce4b863dc12b and fixed in 6.7 with commit 6de426f9276c448e2db7238911c97fb157cb23be |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2023-52808 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/scsi/hisi_sas/hisi_sas_v3_hw.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/f0bfc8a5561fb0b2c48183dcbfe00bdd6d973bd3 |
| https://git.kernel.org/stable/c/33331b265aac9441ac0c1a5442e3f05d038240ec |
| https://git.kernel.org/stable/c/75a2656260fe8c7eeabda6ff4600b29e183f48db |
| https://git.kernel.org/stable/c/b4465009e7d60c6111946db4c8f1e50d401ed7be |
| https://git.kernel.org/stable/c/6de426f9276c448e2db7238911c97fb157cb23be |
