program: r0 = syz_open_dev$tty20(0xc, 0x4, 0x1) ioctl$TIOCSTI(r0, 0x5412, &(0x7f00000000c0)=0xb) ioctl$TIOCSTI(r0, 0x5412, &(0x7f0000000100)=0xff) ioctl$TCSETSW2(r0, 0x402c542c, &(0x7f0000000040)={0xfffffff8, 0x401, 0xfffffffd, 0xc4cf, 0x7, "0441920887e87fcb367800000000080100", 0x4, 0x200}) ioctl$TIOCSTI(r0, 0x5412, &(0x7f0000000140)=0x8) ioctl$TIOCSTI(r0, 0x5412, &(0x7f0000000180)=0x1) io_setup(0x4fb, &(0x7f00000009c0)=0x0) r2 = syz_open_dev$tty20(0xc, 0x4, 0x1) io_submit(r1, 0x1, &(0x7f00000001c0)=[&(0x7f0000000180)={0x0, 0x0, 0x0, 0x1, 0xfffb, r2, 0x0, 0x0, 0xc}]) creat(&(0x7f0000000240)='./file0\x00', 0x0) pipe2$9p(&(0x7f0000001900)={0xffffffffffffffff, 0xffffffffffffffff}, 0x0) write$P9_RVERSION(r4, &(0x7f0000000500)=ANY=[@ANYBLOB="1500000065ffff048000000800395032303030"], 0x15) r5 = dup(r4) write$FUSE_BMAP(r5, &(0x7f0000000100)={0x18}, 0x18) write$FUSE_NOTIFY_RETRIEVE(r5, &(0x7f00000000c0)={0x14c}, 0x137) dup(r3) mount$9p_fd(0x0, &(0x7f0000000000)='./file0\x00', &(0x7f0000000040), 0x0, &(0x7f0000000180)={'trans=fd,', {'rfdno', 0x3d, r3}, 0x2c, {'wfdno', 0x3d, r5}, 0x2c, {[], [], 0x6b}}) chmod(&(0x7f0000000140)='./file0\x00', 0x0) r6 = open$dir(&(0x7f0000000140)='./file0\x00', 0x1, 0x0) r7 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000280)='blkio.throttle.io_serviced\x00', 0x275a, 0x0) mknod(&(0x7f0000000080)='./file0\x00', 0x8000, 0x40) ftruncate(r7, 0x5) sendfile(r6, r7, 0x0, 0x7ffff000) [ 74.348659][ T4705] Bluetooth: hci0: command tx timeout [ 74.522064][ T5355] Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI [ 74.527160][ T5355] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 74.530842][ T5355] CPU: 0 UID: 0 PID: 5355 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-11241-g186f3edfdd41 #0 PREEMPT(full) [ 74.535592][ T5355] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 74.540169][ T5355] RIP: 0010:iter_file_splice_write+0xa9b/0x1000 [ 74.543261][ T5355] Code: 00 74 08 4c 89 f7 e8 f4 31 e0 ff 49 8b 1e 49 c7 06 00 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 44 8b 64 24 04 74 08 48 89 df e8 c1 31 e0 ff 4c 8b [ 74.551653][ T5355] RSP: 0018:ffffc9000d487820 EFLAGS: 00010202 [ 74.554310][ T5355] RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88800048a440 [ 74.557608][ T5355] RDX: 0000000000000002 RSI: 0000000000000000 RDI: 7ffffffffffffffa [ 74.560991][ T5355] RBP: ffffc9000d487a30 R08: ffff8880433d80df R09: 1ffff1100867b01b [ 74.564759][ T5355] R10: dffffc0000000000 R11: ffffffff8202b430 R12: dffffc0000000000 [ 74.568294][ T5355] R13: 7ffffffffffffffa R14: dffffc0000000000 R15: ffff888011685028 [ 74.571650][ T5355] FS: 00007f1ba945c6c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000 [ 74.575359][ T5355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.578279][ T5355] CR2: 0000200000001900 CR3: 0000000043422000 CR4: 0000000000352ef0 [ 74.581736][ T5355] Call Trace: [ 74.583195][ T5355] [ 74.584547][ T5355] ? __pfx_iter_file_splice_write+0x10/0x10 [ 74.587137][ T5355] ? rcu_read_lock_any_held+0xb3/0x120 [ 74.589448][ T5355] ? __pfx_iter_file_splice_write+0x10/0x10 [ 74.591869][ T5355] direct_splice_actor+0x101/0x160 [ 74.594121][ T5355] splice_direct_to_actor+0x5a5/0xcc0 [ 74.596431][ T5355] ? __pfx_direct_splice_actor+0x10/0x10 [ 74.598799][ T5355] ? __pfx_splice_direct_to_actor+0x10/0x10 [ 74.601330][ T5355] ? __pfx_aa_file_perm+0x10/0x10 [ 74.603525][ T5355] do_splice_direct+0x181/0x270 [ 74.605693][ T5355] ? __pfx_do_splice_direct+0x10/0x10 [ 74.608154][ T5355] ? __pfx_direct_file_splice_eof+0x10/0x10 [ 74.610838][ T5355] ? rw_verify_area+0x255/0x4d0 [ 74.612997][ T5355] do_sendfile+0x4da/0x7e0 [ 74.614966][ T5355] ? __pfx_do_sendfile+0x10/0x10 [ 74.616899][ T5355] ? rcu_is_watching+0x15/0xb0 [ 74.619061][ T5355] ? __rseq_handle_notify_resume+0x37e/0x11f0 [ 74.621680][ T5355] __se_sys_sendfile64+0x13e/0x190 [ 74.623831][ T5355] ? __pfx___se_sys_sendfile64+0x10/0x10 [ 74.626124][ T5355] ? rcu_is_watching+0x15/0xb0 [ 74.628092][ T5355] ? do_syscall_64+0xbe/0x3b0 [ 74.630075][ T5355] do_syscall_64+0xfa/0x3b0 [ 74.632004][ T5355] ? lockdep_hardirqs_on+0x9c/0x150 [ 74.634380][ T5355] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.637183][ T5355] ? clear_bhb_loop+0x60/0xb0 [ 74.639334][ T5355] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.641902][ T5355] RIP: 0033:0x7f1ba858eb69 [ 74.643840][ T5355] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 [ 74.651872][ T5355] RSP: 002b:00007f1ba945c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 74.655424][ T5355] RAX: ffffffffffffffda RBX: 00007f1ba87b5fa0 RCX: 00007f1ba858eb69 [ 74.658867][ T5355] RDX: 0000000000000000 RSI: 000000000000000b RDI: 000000000000000a [ 74.662365][ T5355] RBP: 00007f1ba8611df1 R08: 0000000000000000 R09: 0000000000000000 [ 74.665903][ T5355] R10: 000000007ffff000 R11: 0000000000000246 R12: 0000000000000000 [ 74.669266][ T5355] R13: 0000000000000000 R14: 00007f1ba87b5fa0 R15: 00007fffc9290928 [ 74.672717][ T5355] [ 74.674112][ T5355] Modules linked in: [ 74.676313][ T5355] ---[ end trace 0000000000000000 ]--- [ 74.684425][ T5355] RIP: 0010:iter_file_splice_write+0xa9b/0x1000 [ 74.687690][ T5355] Code: 00 74 08 4c 89 f7 e8 f4 31 e0 ff 49 8b 1e 49 c7 06 00 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df <42> 80 3c 30 00 44 8b 64 24 04 74 08 48 89 df e8 c1 31 e0 ff 4c 8b [ 74.695552][ T5355] RSP: 0018:ffffc9000d487820 EFLAGS: 00010202 [ 74.698677][ T5355] RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88800048a440 [ 74.701973][ T5355] RDX: 0000000000000002 RSI: 0000000000000000 RDI: 7ffffffffffffffa [ 74.705550][ T5355] RBP: ffffc9000d487a30 R08: ffff8880433d80df R09: 1ffff1100867b01b [ 74.709296][ T5355] R10: dffffc0000000000 R11: ffffffff8202b430 R12: dffffc0000000000 [ 74.712662][ T5355] R13: 7ffffffffffffffa R14: dffffc0000000000 R15: ffff888011685028 [ 74.716756][ T5355] FS: 00007f1ba945c6c0(0000) GS:ffff88808d21f000(0000) knlGS:0000000000000000 [ 74.720563][ T5355] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.723361][ T5355] CR2: 0000200000001900 CR3: 0000000043422000 CR4: 0000000000352ef0 [ 74.727609][ T5355] Kernel panic - not syncing: Fatal exception [ 74.731249][ T5355] Kernel Offset: disabled [ 74.733538][ T5355] Rebooting in 86400 seconds..