program: r0 = openat(0xffffffffffffff9c, 0x0, 0x0, 0x0) socket$inet_smc(0x2b, 0x1, 0x0) syz_mount_image$vfat(&(0x7f0000000240), &(0x7f0000000280)='./file1\x00', 0x0, &(0x7f0000000000)={[{@uni_xlateno}, {@iocharset={'iocharset', 0x3d, 'cp865'}}]}, 0x1, 0x230, &(0x7f00000008c0)="$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") syz_init_net_socket$802154_raw(0x24, 0x3, 0x0) openat$cuse(0xffffff9c, 0x0, 0x2, 0x0) syz_open_dev$tty20(0xc, 0x4, 0x1) r1 = socket$pppoe(0x18, 0x1, 0x0) connect$pppoe(r1, &(0x7f0000000400)={0x18, 0x0, {0x2, @dev={'\xaa\xaa\xaa\xaa\xaa', 0xa}, 'lo\x00'}}, 0x1e) r2 = openat$ptmx(0xffffffffffffff9c, &(0x7f0000000140), 0x0, 0x0) ioctl$TIOCSETD(r2, 0x5423, &(0x7f0000000080)=0x3) bpf$PROG_LOAD(0x5, &(0x7f0000000180)={0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x90) r3 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000040), 0x0, 0x0) ioctl$EVIOCGPROP(r3, 0x40047438, &(0x7f0000000180)=""/246) r4 = dup(r3) ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) ioctl$PPPIOCCONNECT(r4, 0x40047435, &(0x7f00000002c0)=0x2) ioctl$PPPIOCGCHAN(r1, 0x80047437, &(0x7f0000001f00)) sendmmsg(r1, &(0x7f0000009140)=[{{0x0, 0x0, &(0x7f0000001480)=[{&(0x7f0000000000)="b3c7612122a38f78ed803d60c0f0a6c7bdd030c4de", 0x15}, {&(0x7f0000000300)="faa1960eb20987610663550cc69cb8838b2b34196fc7847ba4692117277283adfb568d05a8ccf2c596188395a2c0531da21d27a36b92f648762fa84738049b9b8fd4c00b9903b3af69149fefb48c2e7394b67c112fc36ec72199", 0x5a}, {&(0x7f0000000280)="d6dcb41bd4a5b728a4", 0x9}, {&(0x7f0000000380)="a447bb30c8fd79df941bf099ca52243dd226a84db7a1c75b509624bdca29ac83f9bf48dfff6361e143a48e7522653d02ec1345865273fca3ce1c973f8f2a82fec827b471a0357eeeb8caf12a36207c601f", 0x51}, {&(0x7f0000000440)="f9d4488fba252a17e5156282709e35e5c66ad63fcc4b53cef927ccad", 0x1c}, {&(0x7f0000000480)="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0x1000}, 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0xfdc}], 0x7}}, {{0x0, 0x0, &(0x7f0000001cc0)=[{&(0x7f0000001b40)="9ef5f516b5b8", 0x6}, {&(0x7f0000001b80)="6c3e3aa2ed785b67f34aa27c37c864a84c3683b7493feeccab436e6925fe33e9a76d6efe5961c56cf936d7136a3653d28c117c816b48e7d9f8ebe6c734bc317d229d5dc02b2c1b3f631c775ce9007b0e881f962e6aa37e5193986228c59f4f1695409c8490a7a42c571157e4d3b4871e10aff422552b5dec841435ce946a13277161c2e3b57e0bed43b367143dbb447d6baf85d0b5e4a07381057e3ffb3a2e4c9ae4c7f1a05b638e81fdeebfb13706683e3ad4b9182733e24dca9cf8cfdd28ddb096834233a722d10ce231e8099ecb8c3d54a5b890ef201b6d5294baf26d4374f5129101968c64", 0xe7}, {&(0x7f0000001c80)="12dc3e9c22bb373f8208715d9af59209a1c81c7bc144e626e4677eff84255b7041449388da3e220a7147d14e01e7", 0x2e}], 0x3}}, {{0x0, 0x0, 0x0}}, {{0x0, 0x0, 0x0}}], 0x4, 0x0) [ 80.305665][ T5091] Bluetooth: hci0: command tx timeout [ 81.513143][ T5106] loop0: detected capacity change from 0 to 128 [ 81.691241][ C0] [ 81.691951][ C0] ================================ [ 81.693442][ C0] WARNING: inconsistent lock state [ 81.695346][ C0] 6.11.0-syzkaller-12113-ge7ed34365879 #0 Not tainted [ 81.697896][ C0] -------------------------------- [ 81.699918][ C0] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. [ 81.702099][ C0] ksoftirqd/0/16 [HC0[0]:SC1[1]:HE1:SE0] takes: [ 81.704154][ C0] ffff888011d7f9e0 (&pch->downl){+.?.}-{2:2}, at: ppp_input+0x18b/0xa10 [ 81.707089][ C0] {SOFTIRQ-ON-W} state was registered at: [ 81.709032][ C0] lock_acquire+0x1ed/0x550 [ 81.710684][ C0] _raw_spin_lock+0x2e/0x40 [ 81.712447][ C0] ppp_input+0x18b/0xa10 [ 81.714014][ C0] pppoe_rcv_core+0x117/0x310 [ 81.715595][ C0] __release_sock+0x243/0x350 [ 81.717390][ C0] release_sock+0x61/0x1f0 [ 81.719018][ C0] pppoe_sendmsg+0xd5/0x750 [ 81.720737][ C0] __sock_sendmsg+0x221/0x270 [ 81.722403][ C0] ____sys_sendmsg+0x52a/0x7e0 [ 81.724263][ C0] __sys_sendmmsg+0x3ab/0x730 [ 81.726071][ C0] __x64_sys_sendmmsg+0xa0/0xb0 [ 81.727601][ C0] do_syscall_64+0xf3/0x230 [ 81.729145][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 81.731208][ C0] irq event stamp: 1990280 [ 81.732708][ C0] hardirqs last enabled at (1990280): [] __local_bh_enable_ip+0x168/0x200 [ 81.736186][ C0] hardirqs last disabled at (1990279): [] __local_bh_enable_ip+0x106/0x200 [ 81.739557][ C0] softirqs last enabled at (1990268): [] run_ksoftirqd+0xca/0x130 [ 81.743308][ C0] softirqs last disabled at (1990273): [] run_ksoftirqd+0xca/0x130 [ 81.746863][ C0] [ 81.746863][ C0] other info that might help us debug this: [ 81.749607][ C0] Possible unsafe locking scenario: [ 81.749607][ C0] [ 81.752104][ C0] CPU0 [ 81.753277][ C0] ---- [ 81.754412][ C0] lock(&pch->downl); [ 81.755854][ C0] [ 81.756928][ C0] lock(&pch->downl); [ 81.758431][ C0] [ 81.758431][ C0] *** DEADLOCK *** [ 81.758431][ C0] [ 81.761340][ C0] 1 lock held by ksoftirqd/0/16: [ 81.763230][ C0] #0: ffffffff8e937de0 (rcu_read_lock){....}-{1:2}, at: ppp_input+0x55/0xa10 [ 81.766528][ C0] [ 81.766528][ C0] stack backtrace: [ 81.768831][ C0] CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.0-syzkaller-12113-ge7ed34365879 #0 [ 81.772668][ C0] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 81.776825][ C0] Call Trace: [ 81.778042][ C0] [ 81.779098][ C0] dump_stack_lvl+0x241/0x360 [ 81.780905][ C0] ? __pfx_dump_stack_lvl+0x10/0x10 [ 81.782835][ C0] ? __pfx__printk+0x10/0x10 [ 81.784582][ C0] print_usage_bug+0x62e/0x8b0 [ 81.786475][ C0] valid_state+0x13a/0x1c0 [ 81.788164][ C0] mark_lock_irq+0xbb/0xc20 [ 81.789921][ C0] ? arch_stack_walk+0x11c/0x150 [ 81.791772][ C0] ? __pfx_mark_lock_irq+0x10/0x10 [ 81.793804][ C0] ? stack_trace_save+0x118/0x1d0 [ 81.795660][ C0] ? __pfx_stack_trace_save+0x10/0x10 [ 81.797660][ C0] ? lockdep_unlock+0x16a/0x300 [ 81.799557][ C0] ? lockdep_lock+0x123/0x2b0 [ 81.801440][ C0] ? save_trace+0x5a/0xb50 [ 81.803209][ C0] ? lockdep_unlock+0x16a/0x300 [ 81.805075][ C0] mark_lock+0x223/0x360 [ 81.806751][ C0] __lock_acquire+0xbf9/0x2050 [ 81.808554][ C0] lock_acquire+0x1ed/0x550 [ 81.810411][ C0] ? ppp_input+0x18b/0xa10 [ 81.812291][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 81.814333][ C0] ? __pfx_lock_acquire+0x10/0x10 [ 81.816338][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 81.818749][ C0] ? __local_bh_enable_ip+0x168/0x200 [ 81.820883][ C0] ? lockdep_hardirqs_on+0x99/0x150 [ 81.822951][ C0] _raw_spin_lock+0x2e/0x40 [ 81.824603][ C0] ? ppp_input+0x18b/0xa10 [ 81.826381][ C0] ppp_input+0x18b/0xa10 [ 81.828047][ C0] ? ppp_input+0x55/0xa10 [ 81.829811][ C0] ppp_async_process+0x7f/0x150 [ 81.831637][ C0] tasklet_action_common+0x321/0x4d0 [ 81.833662][ C0] ? __pfx_tasklet_action_common+0x10/0x10 [ 81.835815][ C0] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 81.838221][ C0] ? __schedule+0x189d/0x4b30 [ 81.839896][ C0] ? workqueue_softirq_action+0xce/0x140 [ 81.841917][ C0] handle_softirqs+0x2c5/0x980 [ 81.843754][ C0] ? run_ksoftirqd+0xca/0x130 [ 81.845584][ C0] ? __pfx_handle_softirqs+0x10/0x10 [ 81.847505][ C0] run_ksoftirqd+0xca/0x130 [ 81.849188][ C0] ? __pfx_run_ksoftirqd+0x10/0x10 [ 81.851163][ C0] ? __pfx_run_ksoftirqd+0x10/0x10 [ 81.853019][ C0] smpboot_thread_fn+0x544/0xa30 [ 81.854958][ C0] ? smpboot_thread_fn+0x4e/0xa30 [ 81.856786][ C0] ? __pfx_smpboot_thread_fn+0x10/0x10 [ 81.858853][ C0] kthread+0x2f0/0x390 [ 81.860430][ C0] ? __pfx_smpboot_thread_fn+0x10/0x10 [ 81.862483][ C0] ? __pfx_kthread+0x10/0x10 [ 81.864177][ C0] ret_from_fork+0x4b/0x80 [ 81.865956][ C0] ? __pfx_kthread+0x10/0x10 [ 81.867704][ C0] ret_from_fork_asm+0x1a/0x30 [ 81.869305][ C0]