> -----Original Message-----
> From: Intel-wired-lan <[email protected]> On Behalf Of 
> Koichiro Den
> Sent: 02 September 2025 06:10
> To: [email protected]
> Cc: Nguyen, Anthony L <[email protected]>; Kitszel, Przemyslaw 
> <[email protected]>; [email protected]; Jagielski, Jedrzej 
> <[email protected]>; [email protected]; 
> [email protected]; [email protected]
> Subject: [Intel-wired-lan] [PATCH v2] ixgbe: fix too early devlink_free() in 
> ixgbe_remove()
>
> Since ixgbe_adapter is embedded in devlink, calling devlink_free() 
> prematurely in the ixgbe_remove() path can lead to UAF. Move devlink_free() 
> to the end.
>
> KASAN report:
>
> BUG: KASAN: use-after-free in ixgbe_reset_interrupt_capability+0x140/0x180 
> [ixgbe]  Read of size 8 at addr ffff0000adf813e0 by task bash/2095
> CPU: 1 UID: 0 PID: 2095 Comm: bash Tainted: G S  6.17.0-rc2-tnguy.net-queue+ 
> #1 PREEMPT(full)  [...]  Call trace:
>  show_stack+0x30/0x90 (C)
>  dump_stack_lvl+0x9c/0xd0
>  print_address_description.constprop.0+0x90/0x310
>  print_report+0x104/0x1f0
>  kasan_report+0x88/0x180
>  __asan_report_load8_noabort+0x20/0x30
>  ixgbe_reset_interrupt_capability+0x140/0x180 [ixgbe]
>  ixgbe_clear_interrupt_scheme+0xf8/0x130 [ixgbe]
>  ixgbe_remove+0x2d0/0x8c0 [ixgbe]
>  pci_device_remove+0xa0/0x220
>  device_remove+0xb8/0x170
> device_release_driver_internal+0x318/0x490
> device_driver_detach+0x40/0x68
>  unbind_store+0xec/0x118
>  drv_attr_store+0x64/0xb8
>  sysfs_kf_write+0xcc/0x138
>  kernfs_fop_write_iter+0x294/0x440
> new_sync_write+0x1fc/0x588
>  vfs_write+0x480/0x6a0
>  ksys_write+0xf0/0x1e0
>  __arm64_sys_write+0x70/0xc0
>  invoke_syscall.constprop.0+0xcc/0x280
>  el0_svc_common.constprop.0+0xa8/0x248
>  do_el0_svc+0x44/0x68
>  el0_svc+0x54/0x160
>  el0t_64_sync_handler+0xa0/0xe8
>  el0t_64_sync+0x1b0/0x1b8
>
> Fixes: a0285236ab93 ("ixgbe: add initial devlink support")
> Signed-off-by: Koichiro Den <[email protected]>
> ---
> Changes in v2:
> - Move only devlink_free()
> ---
> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>

Tested-by: Rinitha S <[email protected]> (A Contingent worker at Intel)

Reply via email to