On Fri, Jan 10, 2025 at 6:31 PM Kun Hu <huk23@xxxxxxxxxxxxxx> wrote: > > > > > 2025年1月6日 16:45，Kun Hu <huk23@xxxxxxxxxxxxxx> 写道： > > > > Hello, > > > > When using our customized fuzzer tool to fuzz the latest Linux kernel, the following crash > > was triggered. > > > > HEAD commit: fc033cf25e612e840e545f8d5ad2edd6ba613ed5 > > git tree: upstream > > Console output: https://drive.google.com/file/d/1aWtDTAUFlAzvMI7YM_TLWbfbyqKFB71i/view?usp=drive_link > > Kernel config: https://drive.google.com/file/d/1n2sLNg-YcIgZqhhQqyMPTDWM_N1Pqz73/view?usp=sharing > > C reproducer: https://drive.google.com/file/d/1oXFZgdxZDCrcZTmyatmI6TeYoHCaIxEA/view?usp=drive_link > > Syzlang reproducer: https://drive.google.com/file/d/1KX9cnANDRzXZ1FjKl3uv6rSFC-5kLsko/view?usp=sharing > > > > > > If you fix this issue, please add the following tag to the commit: > > Reported-by: Kun Hu <huk23@xxxxxxxxxxxxxx>, Jiaji Qin <jjtan24@xxxxxxxxxxxxxx> > > > > watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [syz-executor140:420] > > Modules linked in: > > irq event stamp: 163590 > > hardirqs last enabled at (163589): [<ffffffff9c4d07eb>] irqentry_exit+0x3b/0x90 kernel/entry/common.c:357 > > hardirqs last disabled at (163590): [<ffffffff9c4cedbf>] sysvec_apic_timer_interrupt+0xf/0xb0 arch/x86/kernel/apic/apic.c:1049 > > softirqs last enabled at (163576): [<ffffffff9450f554>] softirq_handle_end kernel/softirq.c:407 [inline] > > softirqs last enabled at (163576): [<ffffffff9450f554>] handle_softirqs+0x544/0x870 kernel/softirq.c:589 > > softirqs last disabled at (163555): [<ffffffff9451120e>] __do_softirq kernel/softirq.c:595 [inline] > > softirqs last disabled at (163555): [<ffffffff9451120e>] invoke_softirq kernel/softirq.c:435 [inline] > > softirqs last disabled at (163555): [<ffffffff9451120e>] __irq_exit_rcu kernel/softirq.c:662 [inline] > > softirqs last disabled at (163555): [<ffffffff9451120e>] irq_exit_rcu+0xee/0x140 kernel/softirq.c:678 > > CPU: 1 UID: 0 PID: 420 Comm: syz-executor140 Not tainted 6.13.0-rc5 #1 > > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 > > RIP: 0010:exfat_clear_bitmap+0x3f1/0x580 fs/exfat/balloc.c:174 > > Code: 24 60 01 00 00 b9 40 0c 00 00 4c 89 fa e8 57 10 ff 01 bf a1 ff ff ff 89 c3 89 c6 e8 49 52 5f ff 83 fb a1 74 13 48 83 c4 18 5b <5d> 41 5c 41 5d 41 5e 41 5f e9 01 50 5f ff e8 fc 4f 5f ff 49 8d b4 > > RSP: 0018:ffa00000035f7a90 EFLAGS: 00000286 > > RAX: 0000000000000000 RBX: 0000000000006ccc RCX: ffffffff952a4d03 > > RDX: 0000000000000011 RSI: ff110000118ba340 RDI: 0000000000000003 > > RBP: ff110000131cc000 R08: 0000000000000000 R09: fffffbfff4d5f0ed > > R10: fffffbfff4d5f0ec R11: 0000000000000001 R12: ff110000131ce000 > > R13: 0000000000000011 R14: 0000000000000000 R15: 0000000006cccf6b > > FS: 000055556ed2d880(0000) GS:ff11000053a80000(0000) knlGS:0000000000000000 > > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > CR2: 00007ffe1b6fdd18 CR3: 000000000db32002 CR4: 0000000000771ef0 > > PKRU: 55555554 > > Call Trace: > > <IRQ> > > </IRQ> > > <TASK> > > __exfat_free_cluster+0x775/0x980 fs/exfat/fatent.c:192 > > exfat_free_cluster+0x7a/0x100 fs/exfat/fatent.c:232 > > __exfat_truncate+0x6bf/0x900 fs/exfat/file.c:235 > > exfat_evict_inode+0x10d/0x1a0 fs/exfat/inode.c:683 > > evict+0x403/0x880 fs/inode.c:796 > > iput_final fs/inode.c:1946 [inline] > > iput fs/inode.c:1972 [inline] > > iput+0x51c/0x830 fs/inode.c:1958 > > do_unlinkat+0x5c7/0x750 fs/namei.c:4594 > > __do_sys_unlink fs/namei.c:4635 [inline] > > __se_sys_unlink fs/namei.c:4633 [inline] > > __x64_sys_unlink+0x40/0x50 fs/namei.c:4633 > > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > > do_syscall_64+0xc3/0x1d0 arch/x86/entry/common.c:83 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > RIP: 0033:0x7ff5d82fb1db > > Code: 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 > > RSP: 002b:00007ffe1b6ff558 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 > > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff5d82fb1db > > RDX: 00007ffe1b6ff580 RSI: 00007ffe1b6ff580 RDI: 00007ffe1b6ff610 > > RBP: 00007ffe1b6ff610 R08: 0000000000000001 R09: 00007ffe1b6ff3e0 > > R10: 00000000fffffff7 R11: 0000000000000206 R12: 00007ffe1b700710 > > R13: 000055556ed36bb0 R14: 00007ffe1b6ff578 R15: 0000000000000001 > > </TASK> > > > > > > --------------- > > thanks, > > Kun Hu > > > Hi, > > I’m not sure if this is sufficient to help locate the bug? If you need additional information, please let me know. Please try to reproduce it with linux-next or the latest Linus tree. > > Thanks, > Kun Hu >
