[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.0.209' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.058225][ T8511] loop0: detected capacity change from 128 to 0 [ 73.070648][ T8511] ================================================================================ [ 73.081036][ T8511] UBSAN: shift-out-of-bounds in fs/jfs/jfs_mount.c:373:25 [ 73.088609][ T8511] shift exponent -9716 is negative [ 73.093888][ T8511] CPU: 0 PID: 8511 Comm: syz-executor446 Not tainted 5.10.0-rc7-next-20201210-syzkaller #0 [ 73.103882][ T8511] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.113954][ T8511] Call Trace: [ 73.117245][ T8511] dump_stack+0x107/0x163 [ 73.121784][ T8511] ubsan_epilogue+0xb/0x5a [ 73.126199][ T8511] __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 [ 73.132972][ T8511] ? __bread_gfp+0x8e/0x3b0 [ 73.137572][ T8511] ? readSuper+0xf2/0x290 [ 73.141927][ T8511] chkSuper.cold+0x1e/0x8b [ 73.146487][ T8511] ? readSuper+0x290/0x290 [ 73.151057][ T8511] ? inode_init_always+0xafd/0xdb0 [ 73.156256][ T8511] jfs_mount+0x47/0x3d0 [ 73.160410][ T8511] jfs_fill_super+0x5b1/0xbc0 [ 73.165087][ T8511] ? jfs_remount+0x640/0x640 [ 73.169669][ T8511] ? set_blocksize+0x1bb/0x400 [ 73.174426][ T8511] mount_bdev+0x34d/0x410 [ 73.178748][ T8511] ? jfs_remount+0x640/0x640 [ 73.183324][ T8511] ? jfs_get_dquots+0x10/0x10 [ 73.187985][ T8511] legacy_get_tree+0x105/0x220 [ 73.192747][ T8511] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.198982][ T8511] ? ns_capable_common+0x117/0x140 [ 73.204083][ T8511] vfs_get_tree+0x89/0x2f0 [ 73.208487][ T8511] path_mount+0x12ae/0x1e70 [ 73.212980][ T8511] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.219467][ T8511] ? strncpy_from_user+0x2a0/0x3e0 [ 73.224569][ T8511] ? finish_automount+0xb20/0xb20 [ 73.229581][ T8511] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.235807][ T8511] ? getname_flags.part.0+0x1dd/0x4f0 [ 73.241283][ T8511] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.248356][ T8511] __x64_sys_mount+0x27f/0x300 [ 73.253124][ T8511] ? copy_mnt_ns+0xae0/0xae0 [ 73.257710][ T8511] ? syscall_enter_from_user_mode+0x1d/0x50 [ 73.263607][ T8511] do_syscall_64+0x2d/0x70 [ 73.268017][ T8511] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.273914][ T8511] RIP: 0033:0x446d5a [ 73.277795][ T8511] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 73.297391][ T8511] RSP: 002b:00007fff49981e98 EFLAGS: 00000283 ORIG_RAX: 00000000000000a5 [ 73.305803][ T8511] RAX: ffffffffffffffda RBX: 00007fff49981ee0 RCX: 0000000000446d5a [ 73.314035][ T8511] RDX: 0000000020000000 RSI: 0000000020000080 RDI: 00007fff49981ea0 [ 73.321998][ T8511] RBP: 00007fff49981ea0 R08: 00007fff49981ee0 R09: 6f6f6c2f7665642f [ 73.330010][ T8511] R10: 0000000000000001 R11: 0000000000000283 R12: 0000000000000004 [ 73.337998][ T8511] R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000001 [ 73.349772][ T8511] ================================================================================ [ 73.359234][ T8511] Kernel panic - not syncing: panic_on_warn set ... [ 73.365826][ T8511] CPU: 0 PID: 8511 Comm: syz-executor446 Not tainted 5.10.0-rc7-next-20201210-syzkaller #0 [ 73.375822][ T8511] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.385890][ T8511] Call Trace: [ 73.389176][ T8511] dump_stack+0x107/0x163 [ 73.393532][ T8511] panic+0x343/0x77f [ 73.397448][ T8511] ? __warn_printk+0xf3/0xf3 [ 73.402066][ T8511] ? ubsan_epilogue+0x3e/0x5a [ 73.406763][ T8511] ubsan_epilogue+0x54/0x5a [ 73.411283][ T8511] __ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 [ 73.418076][ T8511] ? __bread_gfp+0x8e/0x3b0 [ 73.422601][ T8511] ? readSuper+0xf2/0x290 [ 73.426954][ T8511] chkSuper.cold+0x1e/0x8b [ 73.431400][ T8511] ? readSuper+0x290/0x290 [ 73.435829][ T8511] ? inode_init_always+0xafd/0xdb0 [ 73.440938][ T8511] jfs_mount+0x47/0x3d0 [ 73.445101][ T8511] jfs_fill_super+0x5b1/0xbc0 [ 73.450371][ T8511] ? jfs_remount+0x640/0x640 [ 73.454948][ T8511] ? set_blocksize+0x1bb/0x400 [ 73.459704][ T8511] mount_bdev+0x34d/0x410 [ 73.464033][ T8511] ? jfs_remount+0x640/0x640 [ 73.468611][ T8511] ? jfs_get_dquots+0x10/0x10 [ 73.473272][ T8511] legacy_get_tree+0x105/0x220 [ 73.478029][ T8511] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.484788][ T8511] ? ns_capable_common+0x117/0x140 [ 73.489892][ T8511] vfs_get_tree+0x89/0x2f0 [ 73.494904][ T8511] path_mount+0x12ae/0x1e70 [ 73.499399][ T8511] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.505640][ T8511] ? strncpy_from_user+0x2a0/0x3e0 [ 73.510772][ T8511] ? finish_automount+0xb20/0xb20 [ 73.515810][ T8511] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.522038][ T8511] ? getname_flags.part.0+0x1dd/0x4f0 [ 73.527399][ T8511] ? __sanitizer_cov_trace_const_cmp8+0x1d/0x70 [ 73.533645][ T8511] __x64_sys_mount+0x27f/0x300 [ 73.538398][ T8511] ? copy_mnt_ns+0xae0/0xae0 [ 73.542975][ T8511] ? syscall_enter_from_user_mode+0x1d/0x50 [ 73.548966][ T8511] do_syscall_64+0x2d/0x70 [ 73.553374][ T8511] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.559258][ T8511] RIP: 0033:0x446d5a [ 73.563136][ T8511] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 73.582727][ T8511] RSP: 002b:00007fff49981e98 EFLAGS: 00000283 ORIG_RAX: 00000000000000a5 [ 73.591125][ T8511] RAX: ffffffffffffffda RBX: 00007fff49981ee0 RCX: 0000000000446d5a [ 73.599083][ T8511] RDX: 0000000020000000 RSI: 0000000020000080 RDI: 00007fff49981ea0 [ 73.607052][ T8511] RBP: 00007fff49981ea0 R08: 00007fff49981ee0 R09: 6f6f6c2f7665642f [ 73.615020][ T8511] R10: 0000000000000001 R11: 0000000000000283 R12: 0000000000000004 [ 73.622986][ T8511] R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000001 [ 73.631944][ T8511] Kernel Offset: disabled [ 73.636358][ T8511] Rebooting in 86400 seconds..