loop0: detected capacity change from 0 to 264192
FAT-fs (loop0): bogus logical sector size 43640
FAT-fs (loop0): Can't find a valid FAT filesystem
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
(detected by 0, t=105006 jiffies, g=569881, q=2568 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 105006 (4297798096-4297693090), jiffies_till_next_fqs=3, root ->qsmask 0x0
rcu: rcu_preempt kthread timer wakeup didn't happen for 105003 jiffies! g569881 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200
rcu: Possible timer handling issue on cpu=1 timer-softirq=93490
rcu: rcu_preempt kthread starved for 105006 jiffies! g569881 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x200 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R stack:29696 pid:14 ppid:2 flags:0x00004000
Call Trace:
__schedule+0x893/0x24a0
schedule+0xda/0x1b0
schedule_timeout+0x18f/0x480
rcu_gp_fqs_loop+0x1c4/0xc50
rcu_gp_kthread+0x3c4/0x5a0
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 16489 Comm: syz-executor Tainted: G B 6.0.0-rc4-next-20220906 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:kasan_report+0x15/0x1c0
Code: 61 ff ff ff 48 83 c4 60 5b 5d 41 5c e9 34 cd e7 02 0f 1f 40 00 41 57 41 56 41 55 41 54 55 53 48 83 ec 68 9c 8f 04 24 0f 01 ca <65> 4c 8b 3c 25 c0 6e 02 00 41 8b 87 f8 13 00 00 85 c0 0f 85 34 01
RSP: 0018:ffff88803a3b7938 EFLAGS: 00000092
RAX: 0000000000000003 RBX: ffffed1001bdda1d RCX: ffffffff84253137
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88800deed0e0
RBP: ffffed1001bdda1c R08: 0000000000000000 R09: ffff88800deed0e3
R10: ffffed1001bdda1c R11: 0000000000000001 R12: 0000000000000003
R13: ffffed1001bdda1c R14: 0000000000000001 R15: 1ffff11007476f40
FS: 0000555556879400(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562f9581f298 CR3: 0000000044c04000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
kasan_check_range+0x35/0x1c0
queued_spin_lock_slowpath+0xa7/0xc80
do_raw_spin_lock+0x1dc/0x260
kmemleak_scan+0x21d/0x16f0
kmemleak_write+0x570/0x680
full_proxy_write+0x11d/0x190
vfs_write+0x2cb/0xd90
ksys_write+0x127/0x250
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fcf989e65c3
Code: 16 00 00 00 eb ae 90 b8 6e 00 00 00 eb a6 e8 44 ef 04 00 0f 1f 40 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18
RSP: 002b:00007fffc1fdfbe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fffc1fe0228 RCX: 00007fcf989e65c3
RDX: 0000000000000004 RSI: 00007fcf98a9ced9 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000bd1 R09: 00007fffc1ff6080
R10: 00007fffc1ff6090 R11: 0000000000000246 R12: 00000000fffffff6
R13: 00007fffc1fe0ef1 R14: 0000000000000000 R15: 00000000002e2c29
----------------
Code disassembly (best guess), 4 bytes skipped:
0: 48 83 c4 60 add $0x60,%rsp
4: 5b pop %rbx
5: 5d pop %rbp
6: 41 5c pop %r12
8: e9 34 cd e7 02 jmpq 0x2e7cd41
d: 0f 1f 40 00 nopl 0x0(%rax)
11: 41 57 push %r15
13: 41 56 push %r14
15: 41 55 push %r13
17: 41 54 push %r12
19: 55 push %rbp
1a: 53 push %rbx
1b: 48 83 ec 68 sub $0x68,%rsp
1f: 9c pushfq
20: 8f 04 24 popq (%rsp)
23: 0f 01 ca clac
* 26: 65 4c 8b 3c 25 c0 6e mov %gs:0x26ec0,%r15 <-- trapping instruction
2d: 02 00
2f: 41 8b 87 f8 13 00 00 mov 0x13f8(%r15),%eax
36: 85 c0 test %eax,%eax
38: 0f .byte 0xf
39: 85 34 01 test %esi,(%rcx,%rax,1)