CVE-2024-35911

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ice: fix memory corruption bug with suspend and rebuild<br /> <br /> The ice driver would previously panic after suspend. This is caused<br /> from the driver *only* calling the ice_vsi_free_q_vectors() function by<br /> itself, when it is suspending. Since commit b3e7b3a6ee92 ("ice: prevent<br /> NULL pointer deref during reload") the driver has zeroed out<br /> num_q_vectors, and only restored it in ice_vsi_cfg_def().<br /> <br /> This further causes the ice_rebuild() function to allocate a zero length<br /> buffer, after which num_q_vectors is updated, and then the new value of<br /> num_q_vectors is used to index into the zero length buffer, which<br /> corrupts memory.<br /> <br /> The fix entails making sure all the code referencing num_q_vectors only<br /> does so after it has been reset via ice_vsi_cfg_def().<br /> <br /> I didn&amp;#39;t perform a full bisect, but I was able to test against 6.1.77<br /> kernel and that ice driver works fine for suspend/resume with no panic,<br /> so sometime since then, this problem was introduced.<br /> <br /> Also clean up an un-needed init of a local variable in the function<br /> being modified.<br /> <br /> PANIC from 6.8.0-rc1:<br /> <br /> [1026674.915596] PM: suspend exit<br /> [1026675.664697] ice 0000:17:00.1: PTP reset successful<br /> [1026675.664707] ice 0000:17:00.1: 2755 msecs passed between update to cached PHC time<br /> [1026675.667660] ice 0000:b1:00.0: PTP reset successful<br /> [1026675.675944] ice 0000:b1:00.0: 2832 msecs passed between update to cached PHC time<br /> [1026677.137733] ixgbe 0000:31:00.0 ens787: NIC Link is Up 1 Gbps, Flow Control: None<br /> [1026677.190201] BUG: kernel NULL pointer dereference, address: 0000000000000010<br /> [1026677.192753] ice 0000:17:00.0: PTP reset successful<br /> [1026677.192764] ice 0000:17:00.0: 4548 msecs passed between update to cached PHC time<br /> [1026677.197928] #PF: supervisor read access in kernel mode<br /> [1026677.197933] #PF: error_code(0x0000) - not-present page<br /> [1026677.197937] PGD 1557a7067 P4D 0<br /> [1026677.212133] ice 0000:b1:00.1: PTP reset successful<br /> [1026677.212143] ice 0000:b1:00.1: 4344 msecs passed between update to cached PHC time<br /> [1026677.212575]<br /> [1026677.243142] Oops: 0000 [#1] PREEMPT SMP NOPTI<br /> [1026677.247918] CPU: 23 PID: 42790 Comm: kworker/23:0 Kdump: loaded Tainted: G W 6.8.0-rc1+ #1<br /> [1026677.257989] Hardware name: Intel Corporation M50CYP2SBSTD/M50CYP2SBSTD, BIOS SE5C620.86B.01.01.0005.2202160810 02/16/2022<br /> [1026677.269367] Workqueue: ice ice_service_task [ice]<br /> [1026677.274592] RIP: 0010:ice_vsi_rebuild_set_coalesce+0x130/0x1e0 [ice]<br /> [1026677.281421] Code: 0f 84 3a ff ff ff 41 0f b7 74 ec 02 66 89 b0 22 02 00 00 81 e6 ff 1f 00 00 e8 ec fd ff ff e9 35 ff ff ff 48 8b 43 30 49 63 ed 0f b7 34 24 41 83 c5 01 48 8b 3c e8 66 89 b7 aa 02 00 00 81 e6<br /> [1026677.300877] RSP: 0018:ff3be62a6399bcc0 EFLAGS: 00010202<br /> [1026677.306556] RAX: ff28691e28980828 RBX: ff28691e41099828 RCX: 0000000000188000<br /> [1026677.314148] RDX: 0000000000000000 RSI: 0000000000000010 RDI: ff28691e41099828<br /> [1026677.321730] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000<br /> [1026677.329311] R10: 0000000000000007 R11: ffffffffffffffc0 R12: 0000000000000010<br /> [1026677.336896] R13: 0000000000000000 R14: 0000000000000000 R15: ff28691e0eaa81a0<br /> [1026677.344472] FS: 0000000000000000(0000) GS:ff28693cbffc0000(0000) knlGS:0000000000000000<br /> [1026677.353000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> [1026677.359195] CR2: 0000000000000010 CR3: 0000000128df4001 CR4: 0000000000771ef0<br /> [1026677.366779] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000<br /> [1026677.374369] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400<br /> [1026677.381952] PKRU: 55555554<br /> [1026677.385116] Call Trace:<br /> [1026677.388023] <br /> [1026677.390589] ? __die+0x20/0x70<br /> [1026677.394105] ? page_fault_oops+0x82/0x160<br /> [1026677.398576] ? do_user_addr_fault+0x65/0x6a0<br /> [1026677.403307] ? exc_page_fault+0x6a/0x150<br /> [1026677.407694] ? asm_exc_page_fault+0x22/0x30<br /> [1026677.412349] ? ice_vsi_rebuild_set_coalesce+0x130/0x1e0 [ice]<br /> [1026677.4186<br /> ---truncated---