syzbot

BTRFS info (device loop9): max_inline set to 0
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BUG: KMSAN: uninit-value in vsnprintf+0x15be/0x1b00 lib/vsprintf.c:2911
 vsnprintf+0x15be/0x1b00 lib/vsprintf.c:2911
 vprintk_store+0x350/0x1550 kernel/printk/printk.c:2255
 vprintk_emit+0x2c8/0xba0 kernel/printk/printk.c:2402
 vprintk_default+0x3f/0x50 kernel/printk/printk.c:2441
 vprintk+0x36/0x50 kernel/printk/printk_safe.c:82
 __warn_printf lib/bug.c:190 [inline]
 __report_bug+0xa10/0xe00 lib/bug.c:244
 report_bug_entry+0x17c/0x220 lib/bug.c:269
 handle_bug+0xe1/0x230 arch/x86/kernel/traps.c:430
 exc_invalid_op+0x1f/0x50 arch/x86/kernel/traps.c:489
 asm_exc_invalid_op+0x1f/0x30 arch/x86/include/asm/idtentry.h:616
 reg_bounds_sanity_check+0x571/0x14e0 kernel/bpf/verifier.c:2742
 reg_set_min_max+0x3be/0x450 kernel/bpf/verifier.c:16577
 check_cond_jmp_op+0x3a6b/0x5360 kernel/bpf/verifier.c:17021
 do_check_insn kernel/bpf/verifier.c:20446 [inline]
 do_check+0xa487/0x19a20 kernel/bpf/verifier.c:20586
 do_check_common+0x2706/0x4250 kernel/bpf/verifier.c:23870
 do_check_main kernel/bpf/verifier.c:23953 [inline]
 bpf_check+0x1e5a4/0x27320 kernel/bpf/verifier.c:25260
 bpf_prog_load+0x2b41/0x3140 kernel/bpf/syscall.c:3088
 __sys_bpf+0x7df/0xeb0 kernel/bpf/syscall.c:6164
 __do_sys_bpf kernel/bpf/syscall.c:6274 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6272 [inline]
 __x64_sys_bpf+0xa4/0xf0 kernel/bpf/syscall.c:6272
 x64_sys_call+0x31c3/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 vsnprintf+0x15b7/0x1b00 lib/vsprintf.c:-1
 vprintk_store+0x350/0x1550 kernel/printk/printk.c:2255
 vprintk_emit+0x2c8/0xba0 kernel/printk/printk.c:2402
 vprintk_default+0x3f/0x50 kernel/printk/printk.c:2441
 vprintk+0x36/0x50 kernel/printk/printk_safe.c:82
 __warn_printf lib/bug.c:190 [inline]
 __report_bug+0xa10/0xe00 lib/bug.c:244
 report_bug_entry+0x17c/0x220 lib/bug.c:269
 handle_bug+0xe1/0x230 arch/x86/kernel/traps.c:430
 exc_invalid_op+0x1f/0x50 arch/x86/kernel/traps.c:489
 asm_exc_invalid_op+0x1f/0x30 arch/x86/include/asm/idtentry.h:616

Local variable pc created at:
 ___slab_alloc+0x65/0x38b0 mm/slub.c:4468
 __slab_alloc+0xa3/0x180 mm/slub.c:4779

CPU: 1 UID: 0 PID: 15129 Comm: syz.9.2549 Tainted: G             L      syzkaller #0 PREEMPT(voluntary) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
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