Starting sshd: OK syzkaller syzkaller login: [ 14.517620][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 14.517626][ T22] audit: type=1400 audit(1647830996.920:71): avc: denied { transition } for pid=265 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.523133][ T22] audit: type=1400 audit(1647830996.920:72): avc: denied { write } for pid=265 comm="sh" path="pipe:[9873]" dev="pipefs" ino=9873 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 15.334115][ T266] sshd (266) used greatest stack depth: 25944 bytes left [ 66.875677][ T12] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.1.50' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 208.879943][ T22] audit: type=1400 audit(1647831191.280:73): avc: denied { execmem } for pid=299 comm="syz-executor261" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 208.987560][ T22] audit: type=1400 audit(1647831191.390:74): avc: denied { create } for pid=307 comm="syz-executor261" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=xdp_socket permissive=1 [ 209.009343][ T22] audit: type=1400 audit(1647831191.390:75): avc: denied { setopt } for pid=308 comm="syz-executor261" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=xdp_socket permissive=1 executing program executing program executing program executing program executing program executing program [ 209.024768][ T318] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 209.040606][ T318] File: /root/memory.events PID: 318 Comm: syz-executor261 [ 209.069322][ T321] syz-executor261 (321) used greatest stack depth: 25640 bytes left [ 209.179089][ T336] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 209.194459][ T336] File: /root/memory.events PID: 336 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 209.663237][ T387] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 209.675245][ T387] File: /root/memory.events PID: 387 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program [ 209.793195][ T392] syz-executor261 (392) used greatest stack depth: 25520 bytes left [ 209.928211][ T404] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 209.940009][ T404] File: /root/memory.events PID: 404 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program [ 210.170408][ T432] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 210.182282][ T432] File: /root/memory.events PID: 432 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program [ 210.418648][ T466] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 210.433452][ T466] File: /root/memory.events PID: 466 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program [ 210.656706][ T484] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 210.671818][ T484] File: /root/memory.events PID: 484 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program [ 210.783571][ T486] syz-executor261 (486) used greatest stack depth: 25512 bytes left [ 210.914308][ T499] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 210.928246][ T499] File: /root/memory.events PID: 499 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program [ 211.158582][ T541] ------------[ cut here ]------------ [ 211.164058][ T541] WARNING: CPU: 0 PID: 541 at fs/ext4/inode.c:3995 ext4_set_page_dirty+0x17a/0x1a0 [ 211.173305][ T541] Modules linked in: [ 211.177180][ T541] CPU: 0 PID: 541 Comm: syz-executor261 Not tainted 5.4.161-syzkaller-00052-g49216514f3a3 #0 [ 211.187297][ T541] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 211.197343][ T541] RIP: 0010:ext4_set_page_dirty+0x17a/0x1a0 [ 211.203209][ T541] Code: dd 74 22 e8 e8 b4 a3 ff 4c 89 ff 5b 41 5c 41 5d 41 5e 41 5f 5d e9 96 f2 e1 ff 49 ff cd 4d 89 ec e9 e1 fe ff ff e8 c6 b4 a3 ff <0f> 0b eb da 48 ff cd 49 89 ee e9 41 ff ff ff e8 b2 b4 a3 ff 0f 0b [ 211.222785][ T541] RSP: 0018:ffff8881dd13fca8 EFLAGS: 00010293 [ 211.228824][ T541] RAX: ffffffff81bcf70a RBX: 8000000000020015 RCX: ffff8881dd131f80 [ 211.236785][ T541] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 211.244738][ T541] RBP: 0000000000000000 R08: ffffffff81bcf6de R09: fffff94000ef16c9 [ 211.252682][ T541] R10: fffff94000ef16c9 R11: 0000000000000000 R12: ffffea000778b640 [ 211.260624][ T541] R13: dffffc0000000000 R14: ffffea000778b648 R15: ffffea000778b640 [ 211.268567][ T541] FS: 00007f554c8bd700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 211.277466][ T541] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 211.284021][ T541] CR2: 0000000020000040 CR3: 00000001dd9d2000 CR4: 00000000003406f0 [ 211.291964][ T541] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 211.299910][ T541] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 211.307848][ T541] Call Trace: [ 211.311117][ T541] set_page_dirty_lock+0x8e/0xb0 [ 211.316026][ T541] put_user_pages_dirty_lock+0x141/0x320 [ 211.321627][ T541] xdp_umem_create+0x9a4/0xf50 [ 211.326364][ T541] xsk_setsockopt+0x6f2/0x880 [ 211.331012][ T541] ? xsk_poll+0x450/0x450 [ 211.335312][ T541] __sys_setsockopt+0x471/0x700 [ 211.340134][ T541] __x64_sys_setsockopt+0xb1/0xc0 [ 211.345140][ T541] do_syscall_64+0xcb/0x1e0 [ 211.349616][ T541] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 211.355482][ T541] RIP: 0033:0x7f554c94ddb9 [ 211.359872][ T541] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 [ 211.379446][ T541] RSP: 002b:00007f554c8bd2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 211.387836][ T541] RAX: ffffffffffffffda RBX: 00007f554c9d6508 RCX: 00007f554c94ddb9 [ 211.395790][ T541] RDX: 0000000000000004 RSI: 000000000000011b RDI: 0000000000000006 [ 211.403733][ T541] RBP: 00007f554c9d6500 R08: 0000000000000020 R09: 0000000000000000 [ 211.411674][ T541] R10: 0000000020000040 R11: 0000000000000246 R12: 00007f554c9d650c [ 211.419616][ T541] R13: 00007f554c9a307c R14: 652e79726f6d656d R15: 0000000000022000 [ 211.427562][ T541] ---[ end trace 39988e71fbae501f ]--- executing program executing program executing program executing program executing program executing program [ 211.673153][ T556] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 211.685165][ T556] File: /root/memory.events PID: 556 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program [ 211.912475][ T578] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 211.924937][ T578] File: /root/memory.events PID: 578 Comm: syz-executor261 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 213.589203][ T755] ------------[ cut here ]------------ [ 213.594672][ T755] kernel BUG at fs/ext4/inode.c:2732! [ 213.600138][ T755] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 213.606189][ T755] CPU: 1 PID: 755 Comm: syz-executor261 Tainted: G W 5.4.161-syzkaller-00052-g49216514f3a3 #0 [ 213.617698][ T755] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 213.627741][ T755] RIP: 0010:mpage_prepare_extent_to_map+0xa8f/0xaa0 [ 213.634325][ T755] Code: 4c 89 f7 e8 d3 06 d1 ff e9 4e f7 ff ff 0f 8f e7 fe ff ff 48 8d bc 24 98 00 00 00 e8 bb 06 d1 ff e9 d5 fe ff ff e8 11 ec a3 ff <0f> 0b e8 0a ec a3 ff 0f 0b e8 d3 8b 7d ff 0f 1f 00 55 41 57 41 56 [ 213.653911][ T755] RSP: 0018:ffff8881f2dc73d8 EFLAGS: 00010293 [ 213.659951][ T755] RAX: ffffffff81bcbfbf RBX: 00000000000000a8 RCX: ffff8881e14e9f80 [ 213.667894][ T755] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 213.675853][ T755] RBP: 0000000000000000 R08: ffffffff81bcbcac R09: fffff94000ee6281 [ 213.683796][ T755] R10: fffff94000ee6281 R11: 0000000000000000 R12: ffffea0007731400 [ 213.691748][ T755] R13: dffffc0000000000 R14: ffff8881f2dc76b8 R15: ffff8881f2dc76c8 [ 213.699690][ T755] FS: 00007f554c8de700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 213.708588][ T755] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 213.715151][ T755] CR2: 0000000020000040 CR3: 00000001dcb1c000 CR4: 00000000003406e0 [ 213.723098][ T755] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 213.731039][ T755] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 213.738991][ T755] Call Trace: [ 213.742263][ T755] ext4_writepages+0xd5e/0x3cd0 [ 213.747096][ T755] ? xas_load+0x4a6/0x4f0 [ 213.751404][ T755] ? check_preempt_wakeup+0x1a3/0x6f0 [ 213.756757][ T755] ? ext4_readpage+0x2b0/0x2b0 [ 213.761492][ T755] do_writepages+0xda/0x1f0 [ 213.765969][ T755] file_write_and_wait_range+0x2f8/0x3c0 [ 213.771572][ T755] ext4_sync_file+0x1ba/0xc70 [ 213.776221][ T755] ext4_file_write_iter+0x96f/0x1050 [ 213.781478][ T755] do_iter_readv_writev+0x4c2/0x6a0 [ 213.786740][ T755] do_iter_write+0x16f/0x570 [ 213.791318][ T755] iter_file_splice_write+0x70b/0xe50 [ 213.796670][ T755] splice_direct_to_actor+0x435/0xaa0 [ 213.802011][ T755] ? do_splice_direct+0x350/0x350 [ 213.807017][ T755] do_splice_direct+0x228/0x350 [ 213.811839][ T755] do_sendfile+0x878/0x10a0 [ 213.816314][ T755] __x64_sys_sendfile64+0x167/0x1a0 [ 213.821490][ T755] do_syscall_64+0xcb/0x1e0 [ 213.825963][ T755] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 213.831859][ T755] RIP: 0033:0x7f554c94ddb9 [ 213.836246][ T755] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 [ 213.855822][ T755] RSP: 002b:00007f554c8de2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 213.864213][ T755] RAX: ffffffffffffffda RBX: 00007f554c9d64f8 RCX: 00007f554c94ddb9 [ 213.872166][ T755] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 [ 213.880133][ T755] RBP: 00007f554c9d64f0 R08: 00007f554c8de700 R09: 0000000000000000 [ 213.888084][ T755] R10: 00000000f03b0000 R11: 0000000000000246 R12: 00007f554c9d64fc [ 213.896037][ T755] R13: 00007f554c9a307c R14: 652e79726f6d656d R15: 0000000000022000 [ 213.903993][ T755] Modules linked in: [ 213.911703][ T755] ---[ end trace 39988e71fbae5020 ]--- [ 213.917310][ T755] RIP: 0010:mpage_prepare_extent_to_map+0xa8f/0xaa0 [ 213.924065][ T755] Code: 4c 89 f7 e8 d3 06 d1 ff e9 4e f7 ff ff 0f 8f e7 fe ff ff 48 8d bc 24 98 00 00 00 e8 bb 06 d1 ff e9 d5 fe ff ff e8 11 ec a3 ff <0f> 0b e8 0a ec a3 ff 0f 0b e8 d3 8b 7d ff 0f 1f 00 55 41 57 41 56 [ 213.943948][ T755] RSP: 0018:ffff8881f2dc73d8 EFLAGS: 00010293 [ 213.950191][ T755] RAX: ffffffff81bcbfbf RBX: 00000000000000a8 RCX: ffff8881e14e9f80 [ 213.958346][ T755] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 213.966481][ T755] RBP: 0000000000000000 R08: ffffffff81bcbcac R09: fffff94000ee6281 [ 213.974644][ T755] R10: fffff94000ee6281 R11: 0000000000000000 R12: ffffea0007731400 [ 213.982786][ T755] R13: dffffc0000000000 R14: ffff8881f2dc76b8 R15: ffff8881f2dc76c8 [ 213.990966][ T755] FS: 00007f554c8de700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 214.000041][ T755] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 214.006774][ T755] CR2: 0000000020000040 CR3: 00000001dcb1c000 CR4: 00000000003406e0 [ 214.014931][ T755] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 214.023015][ T755] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 214.031143][ T755] Kernel panic - not syncing: Fatal exception [ 214.037355][ T755] Kernel Offset: disabled [ 214.041658][ T755] Rebooting in 86400 seconds..