CVE-2024-40978

In the Linux kernel, the following vulnerability has been resolved:

scsi: qedi: Fix crash while reading debugfs attribute

The qedi_dbg_do_not_recover_cmd_read() function invokes sprintf() directly

on a __user pointer, which results into the crash.

To fix this issue, use a small local stack buffer for sprintf() and then

call simple_read_from_buffer(), which in turns make the copy_to_user()

call.

BUG: unable to handle page fault for address: 00007f4801111000

PGD 8000000864df6067 P4D 8000000864df6067 PUD 864df7067 PMD 846028067 PTE 0

Oops: 0002 [#1] PREEMPT SMP PTI

Hardware name: HPE ProLiant DL380 Gen10/ProLiant DL380 Gen10, BIOS U30 06/15/2023

RIP: 0010:memcpy_orig+0xcd/0x130

RSP: 0018:ffffb7a18c3ffc40 EFLAGS: 00010202

RAX: 00007f4801111000 RBX: 00007f4801111000 RCX: 000000000000000f

RDX: 000000000000000f RSI: ffffffffc0bfd7a0 RDI: 00007f4801111000

RBP: ffffffffc0bfd7a0 R08: 725f746f6e5f6f64 R09: 3d7265766f636572

R10: ffffb7a18c3ffd08 R11: 0000000000000000 R12: 00007f4881110fff

R13: 000000007fffffff R14: ffffb7a18c3ffca0 R15: ffffffffc0bfd7af

FS: 00007f480118a740(0000) GS:ffff98e38af00000(0000) knlGS:0000000000000000

CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

CR2: 00007f4801111000 CR3: 0000000864b8e001 CR4: 00000000007706e0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

PKRU: 55555554

Call Trace:

<TASK>

? __die_body+0x1a/0x60

? page_fault_oops+0x183/0x510

? exc_page_fault+0x69/0x150

? asm_exc_page_fault+0x22/0x30

? memcpy_orig+0xcd/0x130

vsnprintf+0x102/0x4c0

sprintf+0x51/0x80

qedi_dbg_do_not_recover_cmd_read+0x2f/0x50 [qedi 6bcfdeeecdea037da47069eca2ba717c84a77324]

full_proxy_read+0x50/0x80

vfs_read+0xa5/0x2e0

? folio_add_new_anon_rmap+0x44/0xa0

? set_pte_at+0x15/0x30

? do_pte_missing+0x426/0x7f0

ksys_read+0xa5/0xe0

do_syscall_64+0x58/0x80

? __count_memcg_events+0x46/0x90

? count_memcg_event_mm+0x3d/0x60

? handle_mm_fault+0x196/0x2f0

? do_user_addr_fault+0x267/0x890

? exc_page_fault+0x69/0x150

entry_SYSCALL_64_after_hwframe+0x72/0xdc

RIP: 0033:0x7f4800f20b4d