syzbot


kernel panic: corrupted stack end in vfs_fallocate

Status: moderation: reported on 2022/10/25 07:06
Reported-by: syzbot+af4a753312709c45911b@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: 100d, last: 100d

Sample crash report:
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 0 PID: 3829 Comm: syz-executor.1 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
[<ffffffff831afc2c>] __raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
[<ffffffff831afc2c>] _raw_spin_unlock+0x60/0x6a kernel/locking/spinlock.c:186
[<ffffffff807272de>] spin_unlock include/linux/spinlock.h:389 [inline]
[<ffffffff807272de>] ext4_do_update_inode fs/ext4/inode.c:5084 [inline]
[<ffffffff807272de>] ext4_mark_iloc_dirty+0x2da/0x1144 fs/ext4/inode.c:5677
[<ffffffff8072882c>] __ext4_mark_inode_dirty+0x1d8/0x6bc fs/ext4/inode.c:5873
[<ffffffff806de6e4>] __ext4_ext_dirty+0x134/0x156 fs/ext4/extents.c:183
[<ffffffff806e3696>] ext4_ext_insert_extent+0xf44/0x27b2 fs/ext4/extents.c:2170
[<ffffffff806ea018>] ext4_ext_map_blocks+0x1004/0x3e86 fs/ext4/extents.c:4303
[<ffffffff8071fc44>] ext4_map_blocks+0x4fe/0xe64 fs/ext4/inode.c:638
[<ffffffff806de9d2>] ext4_alloc_file_blocks+0x2cc/0x756 fs/ext4/extents.c:4467
[<ffffffff806ed3f2>] ext4_fallocate+0x356/0x2cf4 fs/ext4/extents.c:4744
[<ffffffff804bfc8c>] vfs_fallocate+0x344/0x7a4 fs/open.c:308
[<ffffffff804f6114>] ioctl_preallocate+0x16a/0x1a8 fs/ioctl.c:294
[<ffffffff804f7662>] file_ioctl fs/ioctl.c:334 [inline]
[<ffffffff804f7662>] do_vfs_ioctl fs/ioctl.c:853 [inline]
[<ffffffff804f7662>] __do_sys_ioctl fs/ioctl.c:872 [inline]
[<ffffffff804f7662>] sys_ioctl+0xdc6/0x139e 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 2022/10/21 07:02 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 3a03e294 .config console log report info kernel panic: corrupted stack end in vfs_fallocate
* Struck through repros no longer work on HEAD.