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BUG: KMSAN: uninit-value in can_is_canxl_skb include/linux/can/skb.h:128 [inline]
BUG: KMSAN: uninit-value in can_send+0x269/0x1100 net/can/af_can.c:205
 can_is_canxl_skb include/linux/can/skb.h:128 [inline]
 can_send+0x269/0x1100 net/can/af_can.c:205
 j1939_send_one+0x40f/0x4d0 net/can/j1939/main.c:352
 j1939_xtp_do_tx_ctl+0x69f/0x9e0 net/can/j1939/transport.c:664
 j1939_tp_tx_ctl net/can/j1939/transport.c:672 [inline]
 j1939_session_tx_rts net/can/j1939/transport.c:740 [inline]
 j1939_xtp_txnext_transmiter net/can/j1939/transport.c:880 [inline]
 j1939_tp_txtimer+0x35bb/0x4520 net/can/j1939/transport.c:1158
 __run_hrtimer+0x298/0x910 kernel/time/hrtimer.c:1685
 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline]
 hrtimer_run_softirq+0x4b0/0x870 kernel/time/hrtimer.c:1766
 __do_softirq+0x1c5/0x7b9 kernel/softirq.c:571
 run_ksoftirqd+0x2c/0x50 kernel/softirq.c:934
 smpboot_thread_fn+0x554/0x9f0 kernel/smpboot.c:164
 kthread+0x31b/0x430 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:742 [inline]
 slab_alloc_node mm/slub.c:3398 [inline]
 __kmem_cache_alloc_node+0x6ee/0xc90 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc_node_track_caller+0x117/0x3d0 mm/slab_common.c:975
 kmalloc_reserve net/core/skbuff.c:437 [inline]
 __alloc_skb+0x34a/0xca0 net/core/skbuff.c:509
 alloc_skb include/linux/skbuff.h:1267 [inline]
 j1939_tp_tx_dat_new net/can/j1939/transport.c:593 [inline]
 j1939_xtp_do_tx_ctl+0xa3/0x9e0 net/can/j1939/transport.c:654
 j1939_tp_tx_ctl net/can/j1939/transport.c:672 [inline]
 j1939_session_tx_rts net/can/j1939/transport.c:740 [inline]
 j1939_xtp_txnext_transmiter net/can/j1939/transport.c:880 [inline]
 j1939_tp_txtimer+0x35bb/0x4520 net/can/j1939/transport.c:1158
 __run_hrtimer+0x298/0x910 kernel/time/hrtimer.c:1685
 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline]
 hrtimer_run_softirq+0x4b0/0x870 kernel/time/hrtimer.c:1766
 __do_softirq+0x1c5/0x7b9 kernel/softirq.c:571

CPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 6.1.0-rc2-syzkaller-61955-g4a3e741a3d6a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
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