R13: 0000000000000000 R14: 00007fd2ad5b5fa0 R15: 00007fff137fcde8 F2FS-fs (loop2): Stopped filesystem due to reason: 3 ===================================================== BUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_iovec include/linux/iov_iter.h:52 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:302 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:328 [inline] BUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x4f3/0x32f0 lib/iov_iter.c:185 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_iovec include/linux/iov_iter.h:52 [inline] iterate_and_advance2 include/linux/iov_iter.h:302 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] _copy_to_iter+0x4f3/0x32f0 lib/iov_iter.c:185 copy_to_iter include/linux/uio.h:220 [inline] simple_copy_to_iter net/core/datagram.c:524 [inline] __skb_datagram_iter+0x18f/0x1250 net/core/datagram.c:401 skb_copy_datagram_iter+0x5b/0x1e0 net/core/datagram.c:538 skb_copy_datagram_msg include/linux/skbuff.h:4128 [inline] raw_recvmsg+0x2c8/0xab0 net/ipv4/raw.c:766 inet_recvmsg+0x340/0x690 net/ipv4/af_inet.c:883 sock_recvmsg_nosec+0x19d/0x2f0 net/socket.c:1017 ____sys_recvmsg+0x4e5/0x610 net/socket.c:2784 ___sys_recvmsg+0x20b/0x850 net/socket.c:2828 do_recvmmsg+0x40e/0xdf0 net/socket.c:2923 __sys_recvmmsg net/socket.c:2999 [inline] __do_sys_recvmmsg net/socket.c:3020 [inline] __se_sys_recvmmsg net/socket.c:3013 [inline] __x64_sys_recvmmsg+0x206/0x500 net/socket.c:3013 x64_sys_call+0x220d/0x3db0 arch/x86/include/generated/asm/syscalls_64.h:300 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd9/0x1b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_free_hook mm/slub.c:2324 [inline] slab_free mm/slub.c:4656 [inline] kmem_cache_free+0x286/0xf00 mm/slub.c:4758 skb_kfree_head net/core/skbuff.c:1056 [inline] skb_free_head net/core/skbuff.c:1070 [inline] skb_release_data+0xe56/0x1110 net/core/skbuff.c:1097 skb_release_all net/core/skbuff.c:1162 [inline] __kfree_skb+0x6b/0x260 net/core/skbuff.c:1176 consume_skb+0x83/0x230 net/core/skbuff.c:1408 mac80211_hwsim_tx_frame+0x2d0/0x390 drivers/net/wireless/virtual/mac80211_hwsim.c:2218 __mac80211_hwsim_beacon_tx+0x4fa/0x5e0 drivers/net/wireless/virtual/mac80211_hwsim.c:2267 mac80211_hwsim_beacon_tx+0x5b4/0xc30 drivers/net/wireless/virtual/mac80211_hwsim.c:2317 __iterate_interfaces+0x499/0x750 net/mac80211/util.c:761 ieee80211_iterate_active_interfaces_atomic+0x3f/0x60 net/mac80211/util.c:797 mac80211_hwsim_beacon+0xe0/0x2e0 drivers/net/wireless/virtual/mac80211_hwsim.c:2347 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x556/0xd80 kernel/time/hrtimer.c:1825 hrtimer_run_softirq+0x18e/0x760 kernel/time/hrtimer.c:1842 handle_softirqs+0x166/0x6e0 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0x66/0x180 kernel/softirq.c:680 irq_exit_rcu+0x12/0x20 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x84/0x90 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702 Bytes 22-27 of 28 are uninitialized Memory access of size 28 starts at ffff88811b22f9c0 Data copied to user address 0000200000000700 CPU: 0 UID: 0 PID: 7770 Comm: syz.2.406 Not tainted 6.15.0-rc3-syzkaller-00094-g02ddfb981de8 #0 PREEMPT(undef) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 =====================================================