[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.142' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 91.513148][ T35] audit: type=1400 audit(1608814878.060:8): avc: denied { execmem } for pid=8504 comm="syz-executor281" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 91.519467][ T8505] loop0: detected capacity change from 512 to 0 [ 91.571122][ T8505] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 91.580679][ T8505] ext4 filesystem being mounted at /root/file0 supports timestamps until 2038 (0x7fffffff) [ 91.608776][ T8505] ------------[ cut here ]------------ [ 91.614598][ T8505] WARNING: CPU: 0 PID: 8505 at fs/ext4/xattr.c:1640 ext4_xattr_set_entry+0x29aa/0x3780 [ 91.637912][ T8505] Modules linked in: [ 91.641957][ T8505] CPU: 0 PID: 8505 Comm: syz-executor281 Not tainted 5.10.0-syzkaller #0 [ 91.651981][ T8505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 91.663320][ T8505] RIP: 0010:ext4_xattr_set_entry+0x29aa/0x3780 [ 91.670694][ T8505] Code: 00 e9 18 db ff ff e8 65 33 5a ff 48 8b 7c 24 10 45 31 f6 e8 58 98 cc ff 4c 8b ac 24 18 01 00 00 e9 f9 da ff ff e8 46 33 5a ff <0f> 0b e9 30 e1 ff ff e8 3a 33 5a ff 48 8b 54 24 48 31 f6 4c 89 e7 [ 91.693000][ T8505] RSP: 0018:ffffc900010273a8 EFLAGS: 00010293 [ 91.700280][ T8505] RAX: 0000000000000000 RBX: ffff88801a7d0020 RCX: 0000000000000000 [ 91.709667][ T8505] RDX: ffff8880369662c0 RSI: ffffffff821917aa RDI: 0000000000000003 [ 91.719146][ T8505] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 91.727264][ T8505] R10: ffffffff8218f8d8 R11: 0000000000000000 R12: 00000000000003dc [ 91.736854][ T8505] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc900010276f0 [ 91.745951][ T8505] FS: 00007effa7d61700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 91.755838][ T8505] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.762921][ T8505] CR2: 00007f4a28a75220 CR3: 000000001dbda000 CR4: 00000000001506f0 [ 91.771016][ T8505] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.779113][ T8505] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.787104][ T8505] Call Trace: [ 91.790535][ T8505] ? find_held_lock+0x2d/0x110 [ 91.795325][ T8505] ? ext4_xattr_inode_dec_ref_all+0xa30/0xa30 [ 91.801501][ T8505] ? ext4_xattr_block_set+0x70c/0x2f60 [ 91.806974][ T8505] ? rcu_read_lock_sched_held+0x3a/0x70 [ 91.812720][ T8505] ? trace_kmalloc+0xcd/0x100 [ 91.817421][ T8505] ? __kmalloc+0x1a2/0x340 [ 91.822978][ T8505] ? lockdep_hardirqs_on+0x79/0x100 [ 91.828285][ T8505] ext4_xattr_block_set+0x837/0x2f60 [ 91.833598][ T8505] ? ext4_da_get_block_prep+0x11e0/0x11e0 [ 91.839429][ T8505] ? ext4_xattr_block_find+0x690/0x690 [ 91.844911][ T8505] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 91.850699][ T8505] ? errseq_check+0x4b/0x80 [ 91.855227][ T8505] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 91.861579][ T8505] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 91.867955][ T8505] ? ext4_xattr_block_find+0x5c/0x690 [ 91.873358][ T8505] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 91.879741][ T8505] ext4_xattr_set_handle+0xcb6/0x1260 [ 91.885149][ T8505] ? ext4_xattr_ibody_inline_set+0x2b0/0x2b0 [ 91.891267][ T8505] ? avc_has_extended_perms+0xf50/0xf50 [ 91.896859][ T8505] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 91.903249][ T8505] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 91.909609][ T8505] ? ext4_journal_check_start+0x1ae/0x290 [ 91.915362][ T8505] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 91.921730][ T8505] ext4_xattr_set+0x13a/0x340 [ 91.926443][ T8505] ? ext4_xattr_set_credits+0x200/0x200 [ 91.932183][ T8505] ? __sanitizer_cov_trace_cmp1+0x22/0x80 [ 91.938125][ T8505] ? xattr_resolve_name+0x26e/0x3d0 [ 91.943363][ T8505] ? ext4_xattr_hurd_get+0xf0/0xf0 [ 91.950364][ T8505] __vfs_setxattr+0x10e/0x170 [ 91.955096][ T8505] ? xattr_resolve_name+0x3d0/0x3d0 [ 91.960481][ T8505] ? evm_protect_xattr.constprop.0+0x95/0x3c0 [ 91.966592][ T8505] __vfs_setxattr_noperm+0x11a/0x4c0 [ 91.972082][ T8505] __vfs_setxattr_locked+0x1bf/0x250 [ 91.977426][ T8505] ? __might_fault+0xd3/0x180 [ 91.982279][ T8505] vfs_setxattr+0x135/0x320 [ 91.986827][ T8505] ? __vfs_setxattr_locked+0x250/0x250 [ 91.993113][ T8505] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 92.000385][ T8505] ? strncpy_from_user+0x2a0/0x3e0 [ 92.005553][ T8505] setxattr+0x1ff/0x290 [ 92.010590][ T8505] ? vfs_setxattr+0x320/0x320 [ 92.015292][ T8505] ? lock_release+0x710/0x710 [ 92.021216][ T8505] ? preempt_count_add+0x74/0x140 [ 92.026274][ T8505] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 92.032990][ T8505] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 92.039371][ T8505] ? __mnt_want_write+0x1bc/0x2a0 [ 92.044416][ T8505] path_setxattr+0x170/0x190 [ 92.049186][ T8505] ? setxattr+0x290/0x290 [ 92.053542][ T8505] __x64_sys_lsetxattr+0xbd/0x150 [ 92.058660][ T8505] ? syscall_enter_from_user_mode+0x1d/0x50 [ 92.064587][ T8505] do_syscall_64+0x2d/0x70 [ 92.069062][ T8505] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 92.074974][ T8505] RIP: 0033:0x449bb9 [ 92.078956][ T8505] Code: fd d5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb d5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 92.099138][ T8505] RSP: 002b:00007effa7d60d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd [ 92.107550][ T8505] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000449bb9 [ 92.115601][ T8505] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000020000140 [ 92.123696][ T8505] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 92.131842][ T8505] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 92.139954][ T8505] R13: 000000010000000f R14: 000000ce0000000c R15: 0000010000000020 [ 92.148024][ T8505] Kernel panic - not syncing: panic_on_warn set ... [ 92.154612][ T8505] CPU: 1 PID: 8505 Comm: syz-executor281 Not tainted 5.10.0-syzkaller #0 [ 92.163164][ T8505] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.173216][ T8505] Call Trace: [ 92.176491][ T8505] dump_stack+0x107/0x163 [ 92.180819][ T8505] panic+0x343/0x77f [ 92.184720][ T8505] ? __warn_printk+0xf3/0xf3 [ 92.189318][ T8505] ? __warn.cold+0x1a/0x44 [ 92.193724][ T8505] ? ext4_xattr_set_entry+0x29aa/0x3780 [ 92.199279][ T8505] __warn.cold+0x35/0x44 [ 92.203525][ T8505] ? ext4_xattr_set_entry+0x29aa/0x3780 [ 92.209075][ T8505] report_bug+0x1bd/0x210 [ 92.213401][ T8505] handle_bug+0x3c/0x60 [ 92.217544][ T8505] exc_invalid_op+0x14/0x40 [ 92.222038][ T8505] asm_exc_invalid_op+0x12/0x20 [ 92.226879][ T8505] RIP: 0010:ext4_xattr_set_entry+0x29aa/0x3780 [ 92.233038][ T8505] Code: 00 e9 18 db ff ff e8 65 33 5a ff 48 8b 7c 24 10 45 31 f6 e8 58 98 cc ff 4c 8b ac 24 18 01 00 00 e9 f9 da ff ff e8 46 33 5a ff <0f> 0b e9 30 e1 ff ff e8 3a 33 5a ff 48 8b 54 24 48 31 f6 4c 89 e7 [ 92.252658][ T8505] RSP: 0018:ffffc900010273a8 EFLAGS: 00010293 [ 92.258737][ T8505] RAX: 0000000000000000 RBX: ffff88801a7d0020 RCX: 0000000000000000 [ 92.266699][ T8505] RDX: ffff8880369662c0 RSI: ffffffff821917aa RDI: 0000000000000003 [ 92.274674][ T8505] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 92.282644][ T8505] R10: ffffffff8218f8d8 R11: 0000000000000000 R12: 00000000000003dc [ 92.290612][ T8505] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc900010276f0 [ 92.298597][ T8505] ? ext4_xattr_set_entry+0xad8/0x3780 [ 92.304067][ T8505] ? ext4_xattr_set_entry+0x29aa/0x3780 [ 92.309619][ T8505] ? ext4_xattr_set_entry+0x29aa/0x3780 [ 92.315163][ T8505] ? find_held_lock+0x2d/0x110 [ 92.319921][ T8505] ? ext4_xattr_inode_dec_ref_all+0xa30/0xa30 [ 92.325983][ T8505] ? ext4_xattr_block_set+0x70c/0x2f60 [ 92.331426][ T8505] ? rcu_read_lock_sched_held+0x3a/0x70 [ 92.336960][ T8505] ? trace_kmalloc+0xcd/0x100 [ 92.341636][ T8505] ? __kmalloc+0x1a2/0x340 [ 92.346043][ T8505] ? lockdep_hardirqs_on+0x79/0x100 [ 92.351256][ T8505] ext4_xattr_block_set+0x837/0x2f60 [ 92.356560][ T8505] ? ext4_da_get_block_prep+0x11e0/0x11e0 [ 92.362278][ T8505] ? ext4_xattr_block_find+0x690/0x690 [ 92.367740][ T8505] ? __sanitizer_cov_trace_cmp4+0x1c/0x70 [ 92.373461][ T8505] ? errseq_check+0x4b/0x80 [ 92.377957][ T8505] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 92.384284][ T8505] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 92.390574][ T8505] ? ext4_xattr_block_find+0x5c/0x690 [ 92.395944][ T8505] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 92.402186][ T8505] ext4_xattr_set_handle+0xcb6/0x1260 [ 92.407578][ T8505] ? ext4_xattr_ibody_inline_set+0x2b0/0x2b0 [ 92.413566][ T8505] ? avc_has_extended_perms+0xf50/0xf50 [ 92.419113][ T8505] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 92.425345][ T8505] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 92.431572][ T8505] ? ext4_journal_check_start+0x1ae/0x290 [ 92.437279][ T8505] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 92.443524][ T8505] ext4_xattr_set+0x13a/0x340 [ 92.448208][ T8505] ? ext4_xattr_set_credits+0x200/0x200 [ 92.453780][ T8505] ? __sanitizer_cov_trace_cmp1+0x22/0x80 [ 92.459491][ T8505] ? xattr_resolve_name+0x26e/0x3d0 [ 92.464681][ T8505] ? ext4_xattr_hurd_get+0xf0/0xf0 [ 92.470821][ T8505] __vfs_setxattr+0x10e/0x170 [ 92.475493][ T8505] ? xattr_resolve_name+0x3d0/0x3d0 [ 92.480707][ T8505] ? evm_protect_xattr.constprop.0+0x95/0x3c0 [ 92.486781][ T8505] __vfs_setxattr_noperm+0x11a/0x4c0 [ 92.492077][ T8505] __vfs_setxattr_locked+0x1bf/0x250 [ 92.497362][ T8505] ? __might_fault+0xd3/0x180 [ 92.502055][ T8505] vfs_setxattr+0x135/0x320 [ 92.506581][ T8505] ? __vfs_setxattr_locked+0x250/0x250 [ 92.512037][ T8505] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 92.518279][ T8505] ? strncpy_from_user+0x2a0/0x3e0 [ 92.523402][ T8505] setxattr+0x1ff/0x290 [ 92.527565][ T8505] ? vfs_setxattr+0x320/0x320 [ 92.532270][ T8505] ? lock_release+0x710/0x710 [ 92.536982][ T8505] ? preempt_count_add+0x74/0x140 [ 92.542015][ T8505] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 92.548252][ T8505] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 92.554670][ T8505] ? __mnt_want_write+0x1bc/0x2a0 [ 92.559757][ T8505] path_setxattr+0x170/0x190 [ 92.564354][ T8505] ? setxattr+0x290/0x290 [ 92.568685][ T8505] __x64_sys_lsetxattr+0xbd/0x150 [ 92.573712][ T8505] ? syscall_enter_from_user_mode+0x1d/0x50 [ 92.579620][ T8505] do_syscall_64+0x2d/0x70 [ 92.584027][ T8505] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 92.589911][ T8505] RIP: 0033:0x449bb9 [ 92.593793][ T8505] Code: fd d5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb d5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 92.613390][ T8505] RSP: 002b:00007effa7d60d98 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd [ 92.621804][ T8505] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000449bb9 [ 92.629781][ T8505] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000020000140 [ 92.637744][ T8505] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 92.645716][ T8505] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 92.653687][ T8505] R13: 000000010000000f R14: 000000ce0000000c R15: 0000010000000020 [ 92.662508][ T8505] Kernel Offset: disabled [ 92.666952][ T8505] Rebooting in 86400 seconds..