syzbot


BUG: soft lockup in sys_madvise

Status: auto-obsoleted due to no activity on 2024/06/23 02:57
Reported-by: syzbot+7aea0cd49c884450a8cc@syzkaller.appspotmail.com
First crash: 116d, last: 116d
Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 BUG: soft lockup in sys_madvise 1 805d 805d 0/1 auto-obsoleted due to no activity on 2022/09/03 05:10
linux-4.19 BUG: soft lockup in sys_madvise (2) 1 671d 671d 0/1 auto-obsoleted due to no activity on 2023/01/14 20:18
upstream INFO: rcu detected stall in sys_madvise scsi 1 346d 346d 0/27 auto-obsoleted due to no activity on 2023/11/05 19:10
linux-6.1 INFO: rcu detected stall in sys_madvise 1 17d 17d 0/3 upstream: reported on 2024/07/02 08:27

Sample crash report:
RBP: 000000c012145e48 R08: 0000000000002000 R09: 0000000000000fff
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000003ffff00
R13: 0000000000003680 R14: 000000c01904c4e0 R15: 0000000000000003
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 266s! [syz-fuzzer:4872]
Modules linked in:
CPU: 1 PID: 4872 Comm: syz-fuzzer Tainted: G        W         5.15.148-syzkaller-00718-g993bed180178 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:sync_mm_rss+0x63/0x2e0 mm/memory.c:172
Code: 08 e8 03 87 48 c1 e8 03 48 89 45 c0 4c 89 75 b0 4c 89 e0 4c 89 65 c8 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 04 <84> c0 0f 85 ad 00 00 00 43 8b 9c be 5c 05 00 00 31 ff 89 de e8 94
RSP: 0018:ffffc9000425f588 EFLAGS: 00000a03
RAX: 0000000000000000 RBX: ffff88811da0b480 RCX: ffff888119c5bb40
RDX: 0000000000000000 RSI: ffffc9000425f7c0 RDI: ffff88811da0b480
RBP: ffffc9000425f5d8 R08: ffffffff81a6b81a R09: ffffed102338b769
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1102338b813
R13: ffff88811da0b778 R14: ffff888119c5bb40 R15: 0000000000000000
FS:  000000c018f2fc90(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff9fe80000 CR3: 000000011dff0000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 add_mm_rss_vec+0x65/0x240 mm/memory.c:558
 zap_pte_range mm/memory.c:1488 [inline]
 zap_pmd_range mm/memory.c:1553 [inline]
 zap_pud_range mm/memory.c:1582 [inline]
 zap_p4d_range mm/memory.c:1603 [inline]
 unmap_page_range+0x16c0/0x1ca0 mm/memory.c:1624
 unmap_single_vma mm/memory.c:1669 [inline]
 zap_page_range+0x576/0x770 mm/memory.c:1726
 madvise_dontneed_single_vma mm/madvise.c:795 [inline]
 madvise_dontneed_free mm/madvise.c:850 [inline]
 madvise_vma_behavior mm/madvise.c:988 [inline]
 madvise_walk_vmas mm/madvise.c:1209 [inline]
 do_madvise+0x17e5/0x2bd0 mm/madvise.c:1387
 __do_sys_madvise mm/madvise.c:1400 [inline]
 __se_sys_madvise mm/madvise.c:1398 [inline]
 __x64_sys_madvise+0xa8/0xc0 mm/madvise.c:1398
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x472437
Code: 10 5d c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 48 8b 7c 24 08 48 8b 74 24 10 8b 54 24 18 48 c7 c0 1c 00 00 00 0f 05 <89> 44 24 20 c3 cc cc cc cc 48 8b 7c 24 08 8b 74 24 10 8b 54 24 14
RSP: 002b:000000c012145e20 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 0000000000002000 RCX: 0000000000472437
RDX: 0000000000000004 RSI: 0000000000002000 RDI: 000000c01b790000
RBP: 000000c012145e48 R08: 0000000000002000 R09: 0000000000000fff
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000003ffff00
R13: 0000000000003680 R14: 000000c01904c4e0 R15: 0000000000000003
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 45 Comm: kworker/u4:2 Tainted: G        W         5.15.148-syzkaller-00718-g993bed180178 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x843/0x9b0 kernel/smp.c:969
Code: 45 8b 7d 00 44 89 fe 83 e6 01 31 ff e8 36 a8 0a 00 41 83 e7 01 49 bf 00 00 00 00 00 fc ff df 75 07 e8 71 a4 0a 00 eb 38 f3 90 <42> 0f b6 04 3b 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 55 a4
RSP: 0018:ffffc900002ef880 EFLAGS: 00000293
RAX: ffffffff81657d2b RBX: 1ffff1103ee276cd RCX: ffff8881057fbb40
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900002ef998 R08: ffffffff81657cfa R09: ffffed103ee07053
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000001
R13: ffff8881f713b668 R14: ffff8881f7038280 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff9fe80000 CR3: 000000000680f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 on_each_cpu_cond_mask+0x40/0x80 kernel/smp.c:1135
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1196 [inline]
 text_poke_bp_batch+0x1c4/0x5d0 arch/x86/kernel/alternative.c:1387
 text_poke_flush arch/x86/kernel/alternative.c:1555 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1562
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
 __jump_label_update+0x36a/0x380 kernel/jump_label.c:459
 jump_label_update+0x3af/0x450 kernel/jump_label.c:830
 static_key_enable_cpuslocked+0x12f/0x250 kernel/jump_label.c:177
 static_key_enable+0x1a/0x30 kernel/jump_label.c:190
 toggle_allocation_gate+0xbf/0x460 mm/kfence/core.c:729
 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
 kthread+0x421/0x510 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/25 02:47 android13-5.15-lts 993bed180178 0ea90952 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15-perf BUG: soft lockup in sys_madvise
* Struck through repros no longer work on HEAD.