forked to background, child pid 193 Starting sshd: OK syzkaller syzkaller login: [ 15.165513][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 15.165518][ T22] audit: type=1400 audit(1639266139.360:71): avc: denied { transition } for pid=266 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 [ 15.171999][ T22] audit: type=1400 audit(1639266139.370:72): avc: denied { write } for pid=266 comm="sh" path="pipe:[1955]" dev="pipefs" ino=1955 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 66.931954][ T12] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 86.267425][ T22] audit: type=1400 audit(1639266210.460:73): avc: denied { execmem } for pid=300 comm="syz-executor749" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 86.374802][ T22] audit: type=1400 audit(1639266210.570:74): avc: denied { create } for pid=308 comm="syz-executor749" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=xdp_socket permissive=1 [ 86.399646][ T22] audit: type=1400 audit(1639266210.570:75): avc: denied { setopt } for pid=309 comm="syz-executor749" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=xdp_socket permissive=1 [ 86.411101][ T321] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 86.431871][ T329] ------------[ cut here ]------------ [ 86.432256][ T321] File: /root/memory.events PID: 321 Comm: syz-executor749 [ 86.437332][ T329] WARNING: CPU: 1 PID: 329 at fs/ext4/inode.c:3987 ext4_set_page_dirty+0x17a/0x1a0 [ 86.437334][ T329] Modules linked in: [ 86.437345][ T329] CPU: 1 PID: 329 Comm: syz-executor749 Not tainted 5.4.147-syzkaller-00006-g4fd09f7a7972 #0 [ 86.437354][ T329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 86.478213][ T329] RIP: 0010:ext4_set_page_dirty+0x17a/0x1a0 [ 86.484083][ T329] Code: dd 74 22 e8 f8 b9 a3 ff 4c 89 ff 5b 41 5c 41 5d 41 5e 41 5f 5d e9 66 f9 e1 ff 49 ff cd 4d 89 ec e9 e1 fe ff ff e8 d6 b9 a3 ff <0f> 0b eb da 48 ff cd 49 89 ee e9 41 ff ff ff e8 c2 b9 a3 ff 0f 0b [ 86.503655][ T329] RSP: 0018:ffff8881de4e7ca8 EFLAGS: 00010293 [ 86.509690][ T329] RAX: ffffffff81bd158a RBX: 8000000000020015 RCX: ffff8881de4d5e80 [ 86.517634][ T329] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 86.525577][ T329] RBP: 0000000000000000 R08: ffffffff81bd155e R09: fffff94000ef9bc1 [ 86.533525][ T329] R10: fffff94000ef9bc1 R11: 0000000000000000 R12: ffffea00077cde00 [ 86.541467][ T329] R13: dffffc0000000000 R14: ffffea00077cde08 R15: ffffea00077cde00 [ 86.549414][ T329] FS: 00007f332478f700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 86.558310][ T329] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 86.564861][ T329] CR2: 0000000020000040 CR3: 00000001deb64000 CR4: 00000000003406e0 [ 86.572808][ T329] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 86.580750][ T329] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 86.588692][ T329] Call Trace: [ 86.591961][ T329] set_page_dirty_lock+0x8e/0xb0 [ 86.596872][ T329] put_user_pages_dirty_lock+0x141/0x320 [ 86.602476][ T329] xdp_umem_create+0x9a4/0xf50 [ 86.607215][ T329] xsk_setsockopt+0x6f2/0x880 [ 86.611864][ T329] ? xsk_poll+0x450/0x450 [ 86.616168][ T329] __sys_setsockopt+0x471/0x700 [ 86.620997][ T329] __x64_sys_setsockopt+0xb1/0xc0 [ 86.625998][ T329] do_syscall_64+0xcb/0x1e0 [ 86.630473][ T329] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 86.636335][ T329] RIP: 0033:0x7f332481fdb9 [ 86.640720][ T329] 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 [ 86.660416][ T329] RSP: 002b:00007f332478f2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 86.668805][ T329] RAX: ffffffffffffffda RBX: 00007f33248a8508 RCX: 00007f332481fdb9 [ 86.676745][ T329] RDX: 0000000000000004 RSI: 000000000000011b RDI: 0000000000000006 [ 86.684696][ T329] RBP: 00007f33248a8500 R08: 0000000000200d6f R09: 0000000000000000 [ 86.692643][ T329] R10: 0000000020000040 R11: 0000000000000246 R12: 00007f33248a850c [ 86.700587][ T329] R13: 00007f332487507c R14: 652e79726f6d656d R15: 0000000000022000 [ 86.708626][ T329] ---[ end trace 7a4a6f0dc813371e ]--- executing program executing program executing program executing program executing program executing program [ 86.792932][ T320] syz-executor749 (320) used greatest stack depth: 25976 bytes left [ 86.816304][ T319] syz-executor749 (319) used greatest stack depth: 24696 bytes left [ 86.938502][ T334] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 86.950704][ T334] File: /root/memory.events PID: 334 Comm: syz-executor749 executing program executing program executing program executing program executing program executing program [ 87.184975][ T368] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 87.198441][ T368] File: /root/memory.events PID: 368 Comm: syz-executor749 executing program executing program executing program executing program executing program executing program [ 87.426906][ T391] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 87.438861][ T391] File: /root/memory.events PID: 391 Comm: syz-executor749 executing program executing program executing program executing program executing program executing program [ 87.667555][ T418] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 87.679986][ T418] File: /root/memory.events PID: 418 Comm: syz-executor749 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 88.174336][ T467] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 88.186354][ T467] File: /root/memory.events PID: 467 Comm: syz-executor749 executing program executing program executing program executing program executing program executing program [ 88.415668][ T490] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 88.429127][ T490] File: /root/memory.events PID: 490 Comm: syz-executor749 executing program executing program executing program executing program executing program executing program [ 88.653523][ T515] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 88.665725][ T515] File: /root/memory.events PID: 515 Comm: syz-executor749 [ 88.675234][ T514] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 88.687042][ T514] File: /root/memory.events PID: 514 Comm: syz-executor749 executing program executing program executing program executing program executing program executing program [ 88.951360][ T535] Page cache invalidation failure on direct I/O. Possible data corruption due to collision with buffered I/O! [ 88.963688][ T535] File: /root/memory.events PID: 535 Comm: syz-executor749 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 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 92.743240][ T922] ------------[ cut here ]------------ [ 92.748699][ T922] kernel BUG at fs/ext4/inode.c:2724! [ 92.754107][ T922] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 92.760158][ T922] CPU: 1 PID: 922 Comm: syz-executor749 Tainted: G W 5.4.147-syzkaller-00006-g4fd09f7a7972 #0 [ 92.771670][ T922] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.781880][ T922] RIP: 0010:mpage_prepare_extent_to_map+0xa8f/0xaa0 [ 92.788450][ T922] Code: 4c 89 f7 e8 83 0d d1 ff e9 4e f7 ff ff 0f 8f e7 fe ff ff 48 8d bc 24 98 00 00 00 e8 6b 0d d1 ff e9 d5 fe ff ff e8 21 f1 a3 ff <0f> 0b e8 1a f1 a3 ff 0f 0b e8 a3 78 7d ff 0f 1f 00 55 41 57 41 56 [ 92.808325][ T922] RSP: 0018:ffff8881ef6bf318 EFLAGS: 00010293 [ 92.814370][ T922] RAX: ffffffff81bcde3f RBX: 0000000000000099 RCX: ffff8881f04a3f00 [ 92.822441][ T922] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 92.830387][ T922] RBP: 0000000000000000 R08: ffffffff81bcdb2c R09: fffff94000ee4dc9 [ 92.838458][ T922] R10: fffff94000ee4dc9 R11: 0000000000000000 R12: ffffea0007726e40 [ 92.846421][ T922] R13: dffffc0000000000 R14: ffff8881ef6bf5f8 R15: ffff8881ef6bf608 [ 92.854385][ T922] FS: 00007f33247b0700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 92.863378][ T922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.869953][ T922] CR2: 0000000020000040 CR3: 00000001f0a30000 CR4: 00000000003406e0 [ 92.877907][ T922] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.885860][ T922] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.893805][ T922] Call Trace: [ 92.897077][ T922] ext4_writepages+0xd5e/0x3cd0 [ 92.901905][ T922] ? jbd2_journal_stop+0xae3/0x10a0 [ 92.907074][ T922] ? jbd2_journal_stop+0xae3/0x10a0 [ 92.912243][ T922] ? ext4_readpage+0x2b0/0x2b0 [ 92.916976][ T922] do_writepages+0xda/0x1f0 [ 92.921466][ T922] filemap_write_and_wait_range+0x2e3/0x3a0 [ 92.927342][ T922] generic_file_direct_write+0x142/0x660 [ 92.932947][ T922] ? file_update_time+0x331/0x380 [ 92.937940][ T922] __generic_file_write_iter+0x298/0x480 [ 92.943631][ T922] ext4_file_write_iter+0x875/0x1050 [ 92.948895][ T922] do_iter_readv_writev+0x4c2/0x6a0 [ 92.954071][ T922] do_iter_write+0x16f/0x570 [ 92.958634][ T922] iter_file_splice_write+0x70b/0xe50 [ 92.963979][ T922] splice_direct_to_actor+0x435/0xaa0 [ 92.969341][ T922] ? do_splice_direct+0x350/0x350 [ 92.974332][ T922] do_splice_direct+0x228/0x350 [ 92.979156][ T922] do_sendfile+0x878/0x10a0 [ 92.983638][ T922] __x64_sys_sendfile64+0x167/0x1a0 [ 92.988805][ T922] do_syscall_64+0xcb/0x1e0 [ 92.993279][ T922] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 92.999223][ T922] RIP: 0033:0x7f332481fdb9 [ 93.003607][ T922] 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 [ 93.023387][ T922] RSP: 002b:00007f33247b02f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 [ 93.031772][ T922] RAX: ffffffffffffffda RBX: 00007f33248a84f8 RCX: 00007f332481fdb9 [ 93.039715][ T922] RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 [ 93.047670][ T922] RBP: 00007f33248a84f0 R08: 00007f33247b0700 R09: 0000000000000000 [ 93.055618][ T922] R10: 00000000f03b0000 R11: 0000000000000246 R12: 00007f33248a84fc [ 93.063566][ T922] R13: 00007f332487507c R14: 652e79726f6d656d R15: 0000000000022000 [ 93.071588][ T922] Modules linked in: [ 93.075566][ T922] ---[ end trace 7a4a6f0dc813371f ]--- [ 93.081045][ T922] RIP: 0010:mpage_prepare_extent_to_map+0xa8f/0xaa0 [ 93.087656][ T922] Code: 4c 89 f7 e8 83 0d d1 ff e9 4e f7 ff ff 0f 8f e7 fe ff ff 48 8d bc 24 98 00 00 00 e8 6b 0d d1 ff e9 d5 fe ff ff e8 21 f1 a3 ff <0f> 0b e8 1a f1 a3 ff 0f 0b e8 a3 78 7d ff 0f 1f 00 55 41 57 41 56 [ 93.107469][ T922] RSP: 0018:ffff8881ef6bf318 EFLAGS: 00010293 [ 93.113658][ T922] RAX: ffffffff81bcde3f RBX: 0000000000000099 RCX: ffff8881f04a3f00 [ 93.121718][ T922] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 93.129732][ T922] RBP: 0000000000000000 R08: ffffffff81bcdb2c R09: fffff94000ee4dc9 [ 93.138199][ T922] R10: fffff94000ee4dc9 R11: 0000000000000000 R12: ffffea0007726e40 [ 93.146283][ T922] R13: dffffc0000000000 R14: ffff8881ef6bf5f8 R15: ffff8881ef6bf608 [ 93.154282][ T922] FS: 00007f33247b0700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 93.163229][ T922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 93.169888][ T922] CR2: 00007f3324874f98 CR3: 00000001f0a30000 CR4: 00000000003406f0 [ 93.177977][ T922] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 93.185981][ T922] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 93.194093][ T922] Kernel panic - not syncing: Fatal exception [ 93.200204][ T922] Kernel Offset: disabled [ 93.204513][ T922] Rebooting in 86400 seconds..