> -----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)
