[ OK ] Reached target Basic System. [ OK ] Started Regular background program processing daemon. Starting OpenBSD Secure Shell server... Starting getty on tty2-tty6 if dbus and logind are not available... Starting Permit User Sessions... Starting System Logging Service... [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.11' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 72.982184][ T28] audit: type=1400 audit(1602410832.463:8): avc: denied { execmem } for pid=6868 comm="syz-executor699" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 73.004706][ T6869] REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal [ 73.014701][ T6869] REISERFS (device loop0): using ordered data mode [ 73.021514][ T6869] reiserfs: using flush barriers [ 73.027928][ T6869] REISERFS (device loop0): journal params: device loop0, size 15748, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 [ 73.048957][ T6869] REISERFS (device loop0): checking transaction log (loop0) [ 75.105269][ T6869] REISERFS (device loop0): Using tea hash to sort names [ 75.112618][ T6869] REISERFS (device loop0): using 3.5.x disk format [ 75.120926][ T6869] ================================================================== [ 75.129067][ T6869] BUG: KASAN: use-after-free in search_by_entry_key+0x81f/0x960 [ 75.136675][ T6869] Read of size 4 at addr ffff88807b12f7bd by task syz-executor699/6869 [ 75.144906][ T6869] [ 75.147228][ T6869] CPU: 0 PID: 6869 Comm: syz-executor699 Not tainted 5.9.0-rc8-syzkaller #0 [ 75.155897][ T6869] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.165956][ T6869] Call Trace: [ 75.169232][ T6869] dump_stack+0x198/0x1fd [ 75.173551][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.178817][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.184097][ T6869] print_address_description.constprop.0.cold+0xae/0x497 [ 75.191115][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.196443][ T6869] ? lockdep_hardirqs_off+0x96/0xd0 [ 75.202162][ T6869] ? vprintk_func+0x95/0x1d4 [ 75.206801][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.212081][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.217345][ T6869] kasan_report.cold+0x1f/0x37 [ 75.222092][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.227359][ T6869] search_by_entry_key+0x81f/0x960 [ 75.232456][ T6869] reiserfs_find_entry.part.0+0x139/0xdf0 [ 75.238156][ T6869] ? find_held_lock+0x2d/0x110 [ 75.242909][ T6869] ? lock_is_held_type+0xbb/0xf0 [ 75.247828][ T6869] ? search_by_entry_key+0x960/0x960 [ 75.253104][ T6869] ? __d_lookup_rcu+0x283/0x6a0 [ 75.258087][ T6869] ? check_preemption_disabled+0x50/0x130 [ 75.263805][ T6869] reiserfs_lookup+0x24a/0x490 [ 75.268552][ T6869] ? reiserfs_unlink+0x760/0x760 [ 75.273480][ T6869] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 75.279463][ T6869] ? lockdep_init_map_waits+0x26a/0x8a0 [ 75.285005][ T6869] ? __raw_spin_lock_init+0x34/0x100 [ 75.290275][ T6869] __lookup_slow+0x24c/0x480 [ 75.294846][ T6869] ? page_put_link+0x210/0x210 [ 75.299625][ T6869] ? __d_lookup+0x3ff/0x6f0 [ 75.304130][ T6869] ? d_lookup+0x54/0x60 [ 75.308285][ T6869] lookup_one_len+0x163/0x190 [ 75.312975][ T6869] ? try_lookup_one_len+0x180/0x180 [ 75.318163][ T6869] ? down_write_killable+0x170/0x170 [ 75.323467][ T6869] reiserfs_lookup_privroot+0x92/0x280 [ 75.328907][ T6869] reiserfs_fill_super+0x211b/0x2df3 [ 75.334235][ T6869] ? reiserfs_remount+0x1580/0x1580 [ 75.339455][ T6869] ? lock_downgrade+0x830/0x830 [ 75.344304][ T6869] ? snprintf+0xbb/0xf0 [ 75.349175][ T6869] ? wait_for_completion+0x260/0x260 [ 75.354439][ T6869] ? set_blocksize+0x1c1/0x400 [ 75.359196][ T6869] mount_bdev+0x32e/0x3f0 [ 75.363508][ T6869] ? reiserfs_remount+0x1580/0x1580 [ 75.368694][ T6869] ? reiserfs_kill_sb+0x1e0/0x1e0 [ 75.373698][ T6869] legacy_get_tree+0x105/0x220 [ 75.378444][ T6869] vfs_get_tree+0x89/0x2f0 [ 75.382843][ T6869] path_mount+0x1387/0x20a0 [ 75.387343][ T6869] ? strncpy_from_user+0x2bf/0x3e0 [ 75.392448][ T6869] ? copy_mount_string+0x40/0x40 [ 75.397381][ T6869] ? getname_flags.part.0+0x1dd/0x4f0 [ 75.402739][ T6869] __x64_sys_mount+0x27f/0x300 [ 75.407529][ T6869] ? copy_mnt_ns+0xa60/0xa60 [ 75.412102][ T6869] ? check_preemption_disabled+0x50/0x130 [ 75.417816][ T6869] ? syscall_enter_from_user_mode+0x1d/0x60 [ 75.423708][ T6869] do_syscall_64+0x2d/0x70 [ 75.428123][ T6869] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 75.434009][ T6869] RIP: 0033:0x447d9a [ 75.437895][ T6869] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d a3 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 5a a3 fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 75.457492][ T6869] RSP: 002b:00007ffc05310ef8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 75.465900][ T6869] RAX: ffffffffffffffda RBX: 00007ffc05310f50 RCX: 0000000000447d9a [ 75.473851][ T6869] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc05310f10 [ 75.481821][ T6869] RBP: 00007ffc05310f10 R08: 00007ffc05310f50 R09: 0000000000000000 [ 75.489899][ T6869] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000006 [ 75.497874][ T6869] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 75.505847][ T6869] [ 75.508154][ T6869] The buggy address belongs to the page: [ 75.513769][ T6869] page:0000000031cbcf07 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x7b12f [ 75.523889][ T6869] flags: 0xfffe0000000000() [ 75.528390][ T6869] raw: 00fffe0000000000 ffffea0001ec4c08 ffff8880ae439608 0000000000000000 [ 75.536975][ T6869] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 [ 75.545560][ T6869] page dumped because: kasan: bad access detected [ 75.551945][ T6869] [ 75.554279][ T6869] Memory state around the buggy address: [ 75.559905][ T6869] ffff88807b12f680: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 75.567945][ T6869] ffff88807b12f700: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 75.575986][ T6869] >ffff88807b12f780: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 75.584042][ T6869] ^ [ 75.589914][ T6869] ffff88807b12f800: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 75.598759][ T6869] ffff88807b12f880: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 75.606792][ T6869] ================================================================== [ 75.614845][ T6869] Disabling lock debugging due to kernel taint [ 75.628432][ T6869] Kernel panic - not syncing: panic_on_warn set ... [ 75.635018][ T6869] CPU: 0 PID: 6869 Comm: syz-executor699 Tainted: G B 5.9.0-rc8-syzkaller #0 [ 75.645054][ T6869] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.655105][ T6869] Call Trace: [ 75.658394][ T6869] dump_stack+0x198/0x1fd [ 75.662719][ T6869] ? search_by_entry_key+0x750/0x960 [ 75.667988][ T6869] panic+0x382/0x7fb [ 75.671882][ T6869] ? __warn_printk+0xf3/0xf3 [ 75.676472][ T6869] ? preempt_schedule_common+0x59/0xc0 [ 75.681929][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.687214][ T6869] ? preempt_schedule_thunk+0x16/0x18 [ 75.692580][ T6869] ? trace_hardirqs_on+0x55/0x220 [ 75.697603][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.704218][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.709497][ T6869] end_report+0x4d/0x53 [ 75.713647][ T6869] kasan_report.cold+0xd/0x37 [ 75.718320][ T6869] ? search_by_entry_key+0x81f/0x960 [ 75.723627][ T6869] search_by_entry_key+0x81f/0x960 [ 75.728739][ T6869] reiserfs_find_entry.part.0+0x139/0xdf0 [ 75.734460][ T6869] ? find_held_lock+0x2d/0x110 [ 75.739212][ T6869] ? lock_is_held_type+0xbb/0xf0 [ 75.744150][ T6869] ? search_by_entry_key+0x960/0x960 [ 75.749434][ T6869] ? __d_lookup_rcu+0x283/0x6a0 [ 75.754284][ T6869] ? check_preemption_disabled+0x50/0x130 [ 75.760018][ T6869] reiserfs_lookup+0x24a/0x490 [ 75.764776][ T6869] ? reiserfs_unlink+0x760/0x760 [ 75.769719][ T6869] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 75.775722][ T6869] ? lockdep_init_map_waits+0x26a/0x8a0 [ 75.781243][ T6869] ? __raw_spin_lock_init+0x34/0x100 [ 75.786504][ T6869] __lookup_slow+0x24c/0x480 [ 75.791091][ T6869] ? page_put_link+0x210/0x210 [ 75.795851][ T6869] ? __d_lookup+0x3ff/0x6f0 [ 75.800330][ T6869] ? d_lookup+0x54/0x60 [ 75.804475][ T6869] lookup_one_len+0x163/0x190 [ 75.809126][ T6869] ? try_lookup_one_len+0x180/0x180 [ 75.814328][ T6869] ? down_write_killable+0x170/0x170 [ 75.819606][ T6869] reiserfs_lookup_privroot+0x92/0x280 [ 75.825039][ T6869] reiserfs_fill_super+0x211b/0x2df3 [ 75.830298][ T6869] ? reiserfs_remount+0x1580/0x1580 [ 75.835514][ T6869] ? lock_downgrade+0x830/0x830 [ 75.840341][ T6869] ? snprintf+0xbb/0xf0 [ 75.844475][ T6869] ? wait_for_completion+0x260/0x260 [ 75.849742][ T6869] ? set_blocksize+0x1c1/0x400 [ 75.854478][ T6869] mount_bdev+0x32e/0x3f0 [ 75.858780][ T6869] ? reiserfs_remount+0x1580/0x1580 [ 75.863958][ T6869] ? reiserfs_kill_sb+0x1e0/0x1e0 [ 75.868957][ T6869] legacy_get_tree+0x105/0x220 [ 75.873697][ T6869] vfs_get_tree+0x89/0x2f0 [ 75.878088][ T6869] path_mount+0x1387/0x20a0 [ 75.882599][ T6869] ? strncpy_from_user+0x2bf/0x3e0 [ 75.887693][ T6869] ? copy_mount_string+0x40/0x40 [ 75.892607][ T6869] ? getname_flags.part.0+0x1dd/0x4f0 [ 75.898684][ T6869] __x64_sys_mount+0x27f/0x300 [ 75.903422][ T6869] ? copy_mnt_ns+0xa60/0xa60 [ 75.907992][ T6869] ? check_preemption_disabled+0x50/0x130 [ 75.913689][ T6869] ? syscall_enter_from_user_mode+0x1d/0x60 [ 75.919559][ T6869] do_syscall_64+0x2d/0x70 [ 75.923989][ T6869] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 75.929855][ T6869] RIP: 0033:0x447d9a [ 75.933732][ T6869] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d a3 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 5a a3 fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 75.953310][ T6869] RSP: 002b:00007ffc05310ef8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 75.961693][ T6869] RAX: ffffffffffffffda RBX: 00007ffc05310f50 RCX: 0000000000447d9a [ 75.969653][ T6869] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc05310f10 [ 75.977599][ T6869] RBP: 00007ffc05310f10 R08: 00007ffc05310f50 R09: 0000000000000000 [ 75.985597][ T6869] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000006 [ 75.993560][ T6869] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 76.002701][ T6869] Kernel Offset: disabled [ 76.007046][ T6869] Rebooting in 86400 seconds..