Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 19.809617] ================================================================== [ 19.810686] BUG: KASAN: slab-out-of-bounds in sg_remove_request+0x103/0x120 [ 19.811621] Read of size 8 at addr ffff8801cab6d140 by task syzkaller899755/3739 [ 19.812606] [ 19.812843] CPU: 1 PID: 3739 Comm: syzkaller899755 Not tainted 4.9.85-ge0b05e6 #49 [ 19.813852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 19.815072] ffff8801c3b07a60 ffffffff81d95739 ffffea00072adb40 ffff8801cab6d140 [ 19.816253] 0000000000000000 ffff8801cab6d140 ffff8801d84a4438 ffff8801c3b07a98 [ 19.817405] ffffffff8153e0d3 ffff8801cab6d140 0000000000000008 0000000000000000 [ 19.818557] Call Trace: [ 19.818917] [] dump_stack+0xc1/0x128 [ 19.819635] [] print_address_description+0x73/0x280 [ 19.820515] [] kasan_report+0x275/0x360 [ 19.821261] [] ? sg_remove_request+0x103/0x120 [ 19.822083] [] __asan_report_load8_noabort+0x14/0x20 [ 19.822998] [] sg_remove_request+0x103/0x120 [ 19.823824] [] sg_finish_rem_req+0x295/0x340 [ 19.824627] [] sg_read+0xa16/0x1440 [ 19.825332] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 19.826219] [] ? fasync_insert_entry+0x147/0x2e0 [ 19.827063] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 19.827941] [] __vfs_read+0x103/0x670 [ 19.828665] [] ? default_llseek+0x290/0x290 [ 19.829453] [] ? fsnotify+0x86/0xf30 [ 19.833135] [] ? fsnotify+0xf30/0xf30 [ 19.838556] [] ? avc_policy_seqno+0x9/0x20 [ 19.844407] [] ? selinux_file_permission+0x82/0x460 [ 19.851041] [] ? security_file_permission+0x89/0x1e0 [ 19.857766] [] ? rw_verify_area+0xe5/0x2b0 [ 19.863616] [] vfs_read+0x11e/0x380 [ 19.868859] [] SyS_read+0xd9/0x1b0 [ 19.874015] [] ? vfs_copy_file_range+0x740/0x740 [ 19.880388] [] ? do_syscall_64+0x48/0x490 [ 19.886153] [] ? vfs_copy_file_range+0x740/0x740 [ 19.892527] [] do_syscall_64+0x1a4/0x490 [ 19.898208] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 19.905101] [ 19.906698] Allocated by task 0: [ 19.910038] (stack is not available) [ 19.913714] [ 19.915313] Freed by task 0: [ 19.918304] (stack is not available) [ 19.921983] [ 19.923583] The buggy address belongs to the object at ffff8801cab6d100 [ 19.923583] which belongs to the cache fasync_cache of size 96 [ 19.936218] The buggy address is located 64 bytes inside of [ 19.936218] 96-byte region [ffff8801cab6d100, ffff8801cab6d160) [ 19.947902] The buggy address belongs to the page: [ 19.952798] page:ffffea00072adb40 count:1 mapcount:0 mapping: (null) index:0x0 [ 19.961026] flags: 0x8000000000000080(slab) [ 19.965313] page dumped because: kasan: bad access detected [ 19.970997] [ 19.972595] Memory state around the buggy address: [ 19.977492] ffff8801cab6d000: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 19.984819] ffff8801cab6d080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.992148] >ffff8801cab6d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.999474] ^ [ 20.004891] ffff8801cab6d180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.012215] ffff8801cab6d200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.019539] ================================================================== [ 20.026865] Disabling lock debugging due to kernel taint [ 20.032431] Kernel panic - not syncing: panic_on_warn set ... [ 20.032431] [ 20.039779] CPU: 1 PID: 3739 Comm: syzkaller899755 Tainted: G B 4.9.85-ge0b05e6 #49 [ 20.048668] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.057993] ffff8801c3b079b8 ffffffff81d95739 ffffffff8419777f ffff8801c3b07a90 [ 20.065957] 0000000000000000 ffff8801cab6d140 ffff8801d84a4438 ffff8801c3b07a80 [ 20.073914] ffffffff8142f581 0000000041b58ab3 ffffffff8418b1f0 ffffffff8142f3c5 [ 20.081881] Call Trace: [ 20.084439] [] dump_stack+0xc1/0x128 [ 20.089773] [] panic+0x1bc/0x3a8 [ 20.094760] [] ? percpu_up_read_preempt_enable.constprop.53+0xd7/0xd7 [ 20.102959] [] ? preempt_schedule+0x25/0x30 [ 20.108904] [] ? ___preempt_schedule+0x16/0x18 [ 20.115105] [] kasan_end_report+0x50/0x50 [ 20.120873] [] kasan_report+0x167/0x360 [ 20.126467] [] ? sg_remove_request+0x103/0x120 [ 20.132667] [] __asan_report_load8_noabort+0x14/0x20 [ 20.139388] [] sg_remove_request+0x103/0x120 [ 20.145414] [] sg_finish_rem_req+0x295/0x340 [ 20.151440] [] sg_read+0xa16/0x1440 [ 20.156685] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 20.163318] [] ? fasync_insert_entry+0x147/0x2e0 [ 20.169689] [] ? sg_proc_seq_show_debug+0xd90/0xd90 [ 20.176323] [] __vfs_read+0x103/0x670 [ 20.181739] [] ? default_llseek+0x290/0x290 [ 20.187678] [] ? fsnotify+0x86/0xf30 [ 20.193007] [] ? fsnotify+0xf30/0xf30 [ 20.198426] [] ? avc_policy_seqno+0x9/0x20 [ 20.204277] [] ? selinux_file_permission+0x82/0x460 [ 20.210913] [] ? security_file_permission+0x89/0x1e0 [ 20.217637] [] ? rw_verify_area+0xe5/0x2b0 [ 20.223490] [] vfs_read+0x11e/0x380 [ 20.228735] [] SyS_read+0xd9/0x1b0 [ 20.233891] [] ? vfs_copy_file_range+0x740/0x740 [ 20.240265] [] ? do_syscall_64+0x48/0x490 [ 20.246029] [] ? vfs_copy_file_range+0x740/0x740 [ 20.252404] [] do_syscall_64+0x1a4/0x490 [ 20.258085] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 20.265403] Dumping ftrace buffer: [ 20.268914] (ftrace buffer empty) [ 20.272594] Kernel Offset: disabled [ 20.276192] Rebooting in 86400 seconds..