syzbot


INFO: task hung in vm_unmap_aliases

Status: auto-closed as invalid on 2020/08/18 18:15
Reported-by: syzbot+e156960b6c708348b482@syzkaller.appspotmail.com
First crash: 800d, last: 800d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in vm_unmap_aliases (2) 1 318d 318d 0/1 auto-closed as invalid on 2021/12/13 19:07
linux-4.19 INFO: task hung in vm_unmap_aliases 1 680d 680d 0/1 auto-closed as invalid on 2020/12/16 01:07

Sample crash report:
INFO: task syz-executor.0:19561 blocked for more than 140 seconds.
      Not tainted 4.14.176-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.0  D29168 19561   6338 0x80000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893
 vm_unmap_aliases mm/vmalloc.c:1123 [inline]
 vm_unmap_aliases+0x314/0x3f0 mm/vmalloc.c:1088
 change_page_attr_set_clr+0x543/0xa40 arch/x86/mm/pageattr.c:1472
 change_page_attr_clear arch/x86/mm/pageattr.c:1532 [inline]
 set_memory_ro+0x68/0x80 arch/x86/mm/pageattr.c:1761
 bpf_jit_binary_lock_ro include/linux/filter.h:628 [inline]
 bpf_int_jit_compile+0x441/0x5fe arch/x86/net/bpf_jit_comp.c:1192
 bpf_prog_select_runtime+0xde/0x4f0 kernel/bpf/core.c:1455
 bpf_prog_load+0x609/0xe00 kernel/bpf/syscall.c:1062
 SYSC_bpf kernel/bpf/syscall.c:1512 [inline]
 SyS_bpf+0xf89/0x2cd3 kernel/bpf/syscall.c:1477
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45c829
RSP: 002b:00007feeae741c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00000000004da540 RCX: 000000000045c829
RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000006a R14: 00000000004c30b4 R15: 00007feeae7426d4
INFO: task syz-executor.5:19575 blocked for more than 140 seconds.
      Not tainted 4.14.176-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D29168 19575   6339 0x80000004
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3428
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3486
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x73c/0x1470 kernel/locking/mutex.c:893
 vm_unmap_aliases mm/vmalloc.c:1123 [inline]
 vm_unmap_aliases+0x314/0x3f0 mm/vmalloc.c:1088
 change_page_attr_set_clr+0x543/0xa40 arch/x86/mm/pageattr.c:1472

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/04/20 18:15 linux-4.14.y c10b57a567e4 347a5dc3 .config log report