syzbot


kernel panic: corrupted stack end in tun_chr_ioctl

Status: internal: reported on 2022/06/22 09:26
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: b81d591386c3 riscv: Increase stack size under KASAN
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 228d, last: 228d

Sample crash report:
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 0 PID: 3300 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8000a228>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:113
[<ffffffff831668cc>] show_stack+0x34/0x40 arch/riscv/kernel/stacktrace.c:119
[<ffffffff831756ba>] __dump_stack lib/dump_stack.c:88 [inline]
[<ffffffff831756ba>] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:106
[<ffffffff83175742>] dump_stack+0x1c/0x24 lib/dump_stack.c:113
[<ffffffff83166fa8>] panic+0x24a/0x634 kernel/panic.c:233
[<ffffffff831a688a>] schedule_debug kernel/sched/core.c:5541 [inline]
[<ffffffff831a688a>] schedule+0x0/0x14c kernel/sched/core.c:6187
[<ffffffff831a6b00>] preempt_schedule_common+0x4e/0xde kernel/sched/core.c:6462
[<ffffffff831a6bc4>] preempt_schedule+0x34/0x36 kernel/sched/core.c:6487
[<ffffffff831afd78>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
[<ffffffff831afd78>] _raw_spin_unlock_irqrestore+0x8c/0x98 kernel/locking/spinlock.c:194
[<ffffffff80b09fdc>] __debug_check_no_obj_freed lib/debugobjects.c:1002 [inline]
[<ffffffff80b09fdc>] debug_check_no_obj_freed+0x14c/0x24a lib/debugobjects.c:1023
[<ffffffff80410994>] free_pages_prepare mm/page_alloc.c:1358 [inline]
[<ffffffff80410994>] free_pcp_prepare+0x24e/0x45e mm/page_alloc.c:1404
[<ffffffff804142fe>] free_unref_page_prepare mm/page_alloc.c:3325 [inline]
[<ffffffff804142fe>] free_unref_page+0x6a/0x31e mm/page_alloc.c:3404
[<ffffffff8041471e>] free_the_page mm/page_alloc.c:706 [inline]
[<ffffffff8041471e>] __free_pages+0xe2/0x112 mm/page_alloc.c:5474
[<ffffffff8046d728>] __free_slab+0x122/0x27c mm/slub.c:2028
[<ffffffff8046d8ce>] free_slab mm/slub.c:2043 [inline]
[<ffffffff8046d8ce>] discard_slab+0x4c/0x7a mm/slub.c:2049
[<ffffffff8046deec>] __unfreeze_partials+0x16a/0x18e mm/slub.c:2536
[<ffffffff8046e006>] put_cpu_partial+0xf6/0x162 mm/slub.c:2612
[<ffffffff8046d0ec>] __slab_free+0x166/0x29c mm/slub.c:3378
[<ffffffff8047258c>] do_slab_free mm/slub.c:3497 [inline]
[<ffffffff8047258c>] ___cache_free+0x17c/0x354 mm/slub.c:3516
[<ffffffff8047692e>] qlink_free mm/kasan/quarantine.c:157 [inline]
[<ffffffff8047692e>] qlist_free_all+0x7c/0x132 mm/kasan/quarantine.c:176
[<ffffffff80476ed4>] kasan_quarantine_reduce+0x14c/0x1c8 mm/kasan/quarantine.c:283
[<ffffffff804742b2>] __kasan_slab_alloc+0x5c/0x98 mm/kasan/common.c:446
[<ffffffff804709fc>] kasan_slab_alloc include/linux/kasan.h:260 [inline]
[<ffffffff804709fc>] slab_post_alloc_hook mm/slab.h:732 [inline]
[<ffffffff804709fc>] slab_alloc_node mm/slub.c:3230 [inline]
[<ffffffff804709fc>] slab_alloc mm/slub.c:3238 [inline]
[<ffffffff804709fc>] kmem_cache_alloc+0x338/0x3de mm/slub.c:3243
[<ffffffff80667162>] kmem_cache_zalloc include/linux/slab.h:705 [inline]
[<ffffffff80667162>] __kernfs_new_node+0xfc/0x5f2 fs/kernfs/dir.c:585
[<ffffffff8066a298>] kernfs_new_node+0x66/0xbe fs/kernfs/dir.c:647
[<ffffffff8066e3fc>] __kernfs_create_file+0x4e/0x1e8 fs/kernfs/file.c:987
[<ffffffff806700ba>] sysfs_add_file_mode_ns+0x138/0x254 fs/sysfs/file.c:294
[<ffffffff8067244e>] sysfs_merge_group+0x13e/0x234 fs/sysfs/group.c:342
[<ffffffff81405e50>] dpm_sysfs_add+0x1c6/0x1dc drivers/base/power/sysfs.c:707
[<ffffffff813e6f3a>] device_add+0x846/0x129e drivers/base/core.c:3362
[<ffffffff827bdb6e>] netdev_register_kobject+0xcc/0x208 net/core/net-sysfs.c:2008
[<ffffffff82746298>] register_netdevice+0x8ee/0xc6a net/core/dev.c:9667
[<ffffffff817c65f4>] tun_set_iff drivers/net/tun.c:2770 [inline]
[<ffffffff817c65f4>] __tun_chr_ioctl drivers/net/tun.c:3029 [inline]
[<ffffffff817c65f4>] tun_chr_ioctl+0x219a/0x2b04 drivers/net/tun.c:3314
[<ffffffff804f6ff8>] vfs_ioctl fs/ioctl.c:51 [inline]
[<ffffffff804f6ff8>] __do_sys_ioctl fs/ioctl.c:874 [inline]
[<ffffffff804f6ff8>] sys_ioctl+0x75c/0x139e fs/ioctl.c:860
[<ffffffff80005716>] ret_from_syscall+0x0/0x2
SMP: stopping secondary CPUs
Rebooting in 86400 seconds..

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Title
ci-qemu2-riscv64 2022/06/22 09:25 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 0fc5c330 .config console log report info kernel panic: corrupted stack end in tun_chr_ioctl
* Struck through repros no longer work on HEAD.