Hello, syzbot found the following issue on: HEAD commit: a5541c0811a0 Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=1560b830480000 kernel config: https://syzkaller.appspot.com/x/.config?x=cbd4e584773e9397 dashboard link: https://syzkaller.appspot.com/bug?extid=9743a41f74f00e50fc77 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15e320b3880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=147c0577880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4b7702208fb9/disk-a5541c08.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9ec0153ec051/vmlinux-a5541c08.xz kernel image: https://storage.googleapis.com/syzbot-assets/6f8725ad290a/Image-a5541c08.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/93008694e408/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+9743a41f74f00e50fc77@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 0 PID: 0 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline] WARNING: CPU: 0 PID: 0 at fs/buffer.c:1145 brelse include/linux/buffer_head.h:326 [inline] WARNING: CPU: 0 PID: 0 at fs/buffer.c:1145 __invalidate_bh_lrus fs/buffer.c:1380 [inline] WARNING: CPU: 0 PID: 0 at fs/buffer.c:1145 invalidate_bh_lru+0xa0/0x134 fs/buffer.c:1393 Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __brelse fs/buffer.c:1145 [inline] pc : brelse include/linux/buffer_head.h:326 [inline] pc : __invalidate_bh_lrus fs/buffer.c:1380 [inline] pc : invalidate_bh_lru+0xa0/0x134 fs/buffer.c:1393 lr : __brelse fs/buffer.c:1145 [inline] lr : brelse include/linux/buffer_head.h:326 [inline] lr : __invalidate_bh_lrus fs/buffer.c:1380 [inline] lr : invalidate_bh_lru+0xa0/0x134 fs/buffer.c:1393 sp : ffff800008003e50 x29: ffff800008003e50 x28: ffff80000d2d42f0 x27: ffff80000d2d42e8 x26: ffff800008648d54 x25: ffff0000c054e2a0 x24: 00000000ffffffff x23: ffff0001fefcc830 x22: 0000000000000000 x21: 0000000000000001 x20: 0000000000000000 x19: ffff80000cbe89d6 x18: 000000000000035e x17: ffff8001f1cee000 x16: ffff80000dbe6158 x15: ffff80000d39bc80 x14: 0000000000000000 x13: 00000000ffffffff x12: ffff80000d39bc80 x11: ff808000081c4d64 x10: 0000000000010002 x9 : ad49151c1e37eb00 x8 : ad49151c1e37eb00 x7 : ffff80000c091ebc x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100010002 x0 : 0000000000000027 Call trace: __brelse fs/buffer.c:1145 [inline] brelse include/linux/buffer_head.h:326 [inline] __invalidate_bh_lrus fs/buffer.c:1380 [inline] invalidate_bh_lru+0xa0/0x134 fs/buffer.c:1393 __flush_smp_call_function_queue+0x26c/0x8d8 kernel/smp.c:630 generic_smp_call_function_single_interrupt+0x28/0xfc kernel/smp.c:546 do_handle_IPI arch/arm64/kernel/smp.c:876 [inline] ipi_handler+0x108/0x1a8 arch/arm64/kernel/smp.c:922 handle_percpu_devid_irq+0xb0/0x1cc kernel/irq/chip.c:930 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline] handle_irq_desc kernel/irq/irqdesc.c:648 [inline] generic_handle_domain_irq+0x4c/0x6c kernel/irq/irqdesc.c:704 __gic_handle_irq drivers/irqchip/irq-gic-v3.c:695 [inline] __gic_handle_irq_from_irqson drivers/irqchip/irq-gic-v3.c:746 [inline] gic_handle_irq+0x78/0x1b4 drivers/irqchip/irq-gic-v3.c:790 call_on_irq_stack+0x2c/0x54 arch/arm64/kernel/entry.S:892 do_interrupt_handler+0x7c/0xc0 arch/arm64/kernel/entry-common.c:274 __el1_irq arch/arm64/kernel/entry-common.c:471 [inline] el1_interrupt+0x34/0x68 arch/arm64/kernel/entry-common.c:486 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:491 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:580 arch_local_irq_enable+0xc/0x18 arch/arm64/include/asm/irqflags.h:35 default_idle_call+0x48/0xb8 kernel/sched/idle.c:109 cpuidle_idle_call kernel/sched/idle.c:191 [inline] do_idle+0x110/0x2d4 kernel/sched/idle.c:303 cpu_startup_entry+0x24/0x28 kernel/sched/idle.c:400 kernel_init+0x0/0x290 init/main.c:729 start_kernel+0x0/0x620 init/main.c:890 start_kernel+0x450/0x620 init/main.c:1145 __primary_switched+0xb4/0xbc arch/arm64/kernel/head.S:471 irq event stamp: 114628 hardirqs last enabled at (114627): [<ffff80000c096a3c>] default_idle_call+0x34/0xb8 kernel/sched/idle.c:106 hardirqs last disabled at (114628): [<ffff80000c084174>] __el1_irq arch/arm64/kernel/entry-common.c:468 [inline] hardirqs last disabled at (114628): [<ffff80000c084174>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:486 softirqs last enabled at (114616): [<ffff8000080102e4>] _stext+0x2e4/0x37c softirqs last disabled at (114581): [<ffff800008017c88>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
