Vulnerability CVE-2024-40978

Vulnerability CVE-2024-40978

Published: 2024-07-12

Description:

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

References:

https://git.kernel.org/stable/c/56bec63a7fc87ad50b3373a87517dc9770eef9e0

https://git.kernel.org/stable/c/21c963de2e86e88f6a8ca556bcebb8e62ab8e901

https://git.kernel.org/stable/c/144d76a676b630e321556965011b00e2de0b40a7

https://git.kernel.org/stable/c/397a8990c377ee4b61d6df768e61dff9e316d46b

https://git.kernel.org/stable/c/eaddb86637669f6bad89245ee63f8fb2bfb50241

https://git.kernel.org/stable/c/fa85b016a56b9775a3fe41e5d26e666945963b46

https://git.kernel.org/stable/c/e2f433ea7d0ff77998766a088a287337fb43ad75

https://git.kernel.org/stable/c/28027ec8e32ecbadcd67623edb290dad61e735b5

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