> -----Original Message----- > From: Intel-wired-lan <[email protected]> On Behalf Of > Michal Schmidt > Sent: 02 February 2026 15:48 > To: Nguyen, Anthony L <[email protected]>; Kitszel, Przemyslaw > <[email protected]>; Andrew Lunn <[email protected]>; David S. > Miller <[email protected]>; Eric Dumazet <[email protected]>; Jakub > Kicinski <[email protected]>; Paolo Abeni <[email protected]>; Lobakin, > Aleksander <[email protected]>; Keller, Jacob E > <[email protected]>; Michal Kubiak <[email protected]> > Cc: [email protected]; [email protected]; > [email protected] > Subject: [Intel-wired-lan] [PATCH net] ice: fix crash in ethtool offline > loopback test > > Since the conversion of ice to page pool, the ethtool loopback test > crashes: > > BUG: kernel NULL pointer dereference, address: 000000000000000c > #PF: supervisor write access in kernel mode > #PF: error_code(0x0002) - not-present page PGD 1100f1067 P4D 0 > Oops: Oops: 0002 [#1] SMP NOPTI > CPU: 23 UID: 0 PID: 5904 Comm: ethtool Kdump: loaded Not tainted > 6.19.0-0.rc7.260128g1f97d9dcf5364.49.eln154.x86_64 #1 PREEMPT(lazy) Hardware > name: [...] > RIP: 0010:ice_alloc_rx_bufs+0x1cd/0x310 [ice] > Code: 83 6c 24 30 01 66 41 89 47 08 0f 84 c0 00 00 00 41 0f b7 dc 48 8b 44 24 > 18 48 c1 e3 04 41 bb 00 10 00 00 48 8d 2c 18 8b 04 24 <89> 45 0c 41 8b 4d 00 > 49 d3 e3 44 3b 5c 24 24 0f 83 ac fe ff ff 44 > RSP: 0018:ff7894738aa1f768 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: 0000000000000700 RDI: 0000000000000000 > RBP: 0000000000000000 R08: ff16dcae79880200 R09: 0000000000000019 > R10: 0000000000000001 R11: 0000000000001000 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: ff16dcae6c670000 > FS: 00007fcf428850c0(0000) GS:ff16dcb149710000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 000000000000000c CR3: 0000000121227005 CR4: 0000000000773ef0 > PKRU: 55555554 > Call Trace: > <TASK> > ice_vsi_cfg_rxq+0xca/0x460 [ice] > ice_vsi_cfg_rxqs+0x54/0x70 [ice] > ice_loopback_test+0xa9/0x520 [ice] > ice_self_test+0x1b9/0x280 [ice] > ethtool_self_test+0xe5/0x200 > __dev_ethtool+0x1106/0x1a90 > dev_ethtool+0xbe/0x1a0 > dev_ioctl+0x258/0x4c0 > sock_do_ioctl+0xe3/0x130 > __x64_sys_ioctl+0xb9/0x100 > do_syscall_64+0x7c/0x700 > entry_SYSCALL_64_after_hwframe+0x76/0x7e > [...] > > It crashes because we have not initialized libeth for the rx ring. > > Fix it by treating ICE_VSI_LB VSIs slightly more like normal PF VSIs and > letting them have a q_vector. It's just a dummy, because the loopback test > does not use interrupts, but it contains a napi struct that can be passed to > libeth_rx_fq_create() called from ice_vsi_cfg_rxq() -> ice_rxq_pp_create(). > > Fixes: 93f53db9f9dc ("ice: switch to Page Pool") > Signed-off-by: Michal Schmidt <[email protected]> > --- > drivers/net/ethernet/intel/ice/ice_base.c | 5 ++++- > drivers/net/ethernet/intel/ice/ice_ethtool.c | 4 ++++ > drivers/net/ethernet/intel/ice/ice_lib.c | 15 ++++++++++----- > 3 files changed, 18 insertions(+), 6 deletions(-) >
Tested-by: Rinitha S <[email protected]> (A Contingent worker at Intel)
