syzbot


kernel panic: corrupted stack end in ext4_file_mmap

Status: fixed on 2023/02/24 13:50
Subsystems: ext4
[Documentation on labels]
Fix commit: b81d591386c3 riscv: Increase stack size under KASAN
First crash: 577d, last: 432d

Sample crash report:
Kernel panic - not syncing: corrupted stack end detected inside scheduler
CPU: 0 PID: 2045 Comm: rm 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
[<ffffffff800f78dc>] spin_unlock_irqrestore include/linux/spinlock.h:404 [inline]
[<ffffffff800f78dc>] __wake_up_common_lock+0xe4/0x136 kernel/sched/wait.c:140
[<ffffffff800f793e>] __wake_up+0x10/0x18 kernel/sched/wait.c:157
[<ffffffff807d89b4>] stop_this_handle+0x2ae/0x2d0 fs/jbd2/transaction.c:759
[<ffffffff807db4d0>] jbd2_journal_stop+0x790/0x99c fs/jbd2/transaction.c:1929
[<ffffffff806db4c0>] __ext4_journal_stop+0x90/0x154 fs/ext4/ext4_jbd2.c:127
[<ffffffff80733194>] ext4_dirty_inode+0xa2/0xba fs/ext4/inode.c:5903
[<ffffffff8053ebec>] __mark_inode_dirty+0x40a/0xf04 fs/fs-writeback.c:2409
[<ffffffff8050f47c>] generic_update_time fs/inode.c:1856 [inline]
[<ffffffff8050f47c>] inode_update_time fs/inode.c:1869 [inline]
[<ffffffff8050f47c>] touch_atime+0x656/0x67a fs/inode.c:1941
[<ffffffff806fb95c>] file_accessed include/linux/fs.h:2421 [inline]
[<ffffffff806fb95c>] ext4_file_mmap+0x236/0x23c fs/ext4/file.c:778
[<ffffffff803eff16>] call_mmap include/linux/fs.h:2079 [inline]
[<ffffffff803eff16>] mmap_region+0x7a0/0xa88 mm/mmap.c:1793
[<ffffffff803f0982>] do_mmap+0x784/0x8d2 mm/mmap.c:1582
[<ffffffff80395578>] vm_mmap_pgoff+0x1a2/0x24e mm/util.c:519
[<ffffffff803956a6>] vm_mmap+0x82/0xaa mm/util.c:538
[<ffffffff805ffe1a>] elf_map+0x140/0x1da fs/binfmt_elf.c:388
[<ffffffff80600aae>] load_elf_binary+0x86c/0x2716 fs/binfmt_elf.c:1154
[<ffffffff804d6cd0>] search_binary_handler fs/exec.c:1727 [inline]
[<ffffffff804d6cd0>] exec_binprm fs/exec.c:1768 [inline]
[<ffffffff804d6cd0>] bprm_execve fs/exec.c:1837 [inline]
[<ffffffff804d6cd0>] bprm_execve+0x5bc/0x1140 fs/exec.c:1799
[<ffffffff804d8b3a>] do_execveat_common+0x298/0x312 fs/exec.c:1926
[<ffffffff804da664>] do_execve fs/exec.c:1994 [inline]
[<ffffffff804da664>] __do_sys_execve fs/exec.c:2070 [inline]
[<ffffffff804da664>] sys_execve+0x32/0x40 fs/exec.c:2065
[<ffffffff80005716>] ret_from_syscall+0x0/0x2
SMP: stopping secondary CPUs
Rebooting in 86400 seconds..

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/02/19 15:35 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d bcdf85f8 .config console log report info ci-qemu2-riscv64 kernel panic: corrupted stack end in ext4_file_mmap
2022/09/27 20:46 git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes 0966d385830d 87840e00 .config console log report info ci-qemu2-riscv64 kernel panic: corrupted stack end in ext4_file_mmap
* Struck through repros no longer work on HEAD.