CVE-2024-40978

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> scsi: qedi: Fix crash while reading debugfs attribute<br /> <br /> The qedi_dbg_do_not_recover_cmd_read() function invokes sprintf() directly<br /> on a __user pointer, which results into the crash.<br /> <br /> To fix this issue, use a small local stack buffer for sprintf() and then<br /> call simple_read_from_buffer(), which in turns make the copy_to_user()<br /> call.<br /> <br /> BUG: unable to handle page fault for address: 00007f4801111000<br /> PGD 8000000864df6067 P4D 8000000864df6067 PUD 864df7067 PMD 846028067 PTE 0<br /> Oops: 0002 [#1] PREEMPT SMP PTI<br /> Hardware name: HPE ProLiant DL380 Gen10/ProLiant DL380 Gen10, BIOS U30 06/15/2023<br /> RIP: 0010:memcpy_orig+0xcd/0x130<br /> RSP: 0018:ffffb7a18c3ffc40 EFLAGS: 00010202<br /> RAX: 00007f4801111000 RBX: 00007f4801111000 RCX: 000000000000000f<br /> RDX: 000000000000000f RSI: ffffffffc0bfd7a0 RDI: 00007f4801111000<br /> RBP: ffffffffc0bfd7a0 R08: 725f746f6e5f6f64 R09: 3d7265766f636572<br /> R10: ffffb7a18c3ffd08 R11: 0000000000000000 R12: 00007f4881110fff<br /> R13: 000000007fffffff R14: ffffb7a18c3ffca0 R15: ffffffffc0bfd7af<br /> FS: 00007f480118a740(0000) GS:ffff98e38af00000(0000) knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: 00007f4801111000 CR3: 0000000864b8e001 CR4: 00000000007706e0<br /> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000<br /> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400<br /> PKRU: 55555554<br /> Call Trace:<br /> <br /> ? __die_body+0x1a/0x60<br /> ? page_fault_oops+0x183/0x510<br /> ? exc_page_fault+0x69/0x150<br /> ? asm_exc_page_fault+0x22/0x30<br /> ? memcpy_orig+0xcd/0x130<br /> vsnprintf+0x102/0x4c0<br /> sprintf+0x51/0x80<br /> qedi_dbg_do_not_recover_cmd_read+0x2f/0x50 [qedi 6bcfdeeecdea037da47069eca2ba717c84a77324]<br /> full_proxy_read+0x50/0x80<br /> vfs_read+0xa5/0x2e0<br /> ? folio_add_new_anon_rmap+0x44/0xa0<br /> ? set_pte_at+0x15/0x30<br /> ? do_pte_missing+0x426/0x7f0<br /> ksys_read+0xa5/0xe0<br /> do_syscall_64+0x58/0x80<br /> ? __count_memcg_events+0x46/0x90<br /> ? count_memcg_event_mm+0x3d/0x60<br /> ? handle_mm_fault+0x196/0x2f0<br /> ? do_user_addr_fault+0x267/0x890<br /> ? exc_page_fault+0x69/0x150<br /> entry_SYSCALL_64_after_hwframe+0x72/0xdc<br /> RIP: 0033:0x7f4800f20b4d