------------[ cut here ]------------ field width 1965830205 out of range WARNING: lib/vsprintf.c:2654 at set_field_width lib/vsprintf.c:2654 [inline], CPU#1: syz.6.528/7845 WARNING: lib/vsprintf.c:2654 at vsnprintf+0xb9c/0xd10 lib/vsprintf.c:2918, CPU#1: syz.6.528/7845 Modules linked in: CPU: 1 UID: 0 PID: 7845 Comm: syz.6.528 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : set_field_width lib/vsprintf.c:2654 [inline] pc : vsnprintf+0xb9c/0xd10 lib/vsprintf.c:2918 lr : set_field_width lib/vsprintf.c:2654 [inline] lr : vsnprintf+0xb9c/0xd10 lib/vsprintf.c:2918 sp : ffff800094bf6b10 x29: ffff800094bf6b60 x28: 00000000007fffff x27: ffff8000875163e2 x26: 00000000752c303d x25: ffff800094bf6bd8 x24: 0000000000000402 x23: ffff800094bf6f18 x22: ffff800087bfd080 x21: ffff800094bf6bf0 x20: ffff800094bf6ecb x19: dfff800000000000 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000020000340 x14: 000000000065bc18 x13: 0000000000000001 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000080000 x9 : c5ff3e32ef0be400 x8 : c5ff3e32ef0be400 x7 : ffff800080490900 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000802fa1bc x2 : 0000000100000000 x1 : ffff000118c68000 x0 : 0000000000000001 Call trace: set_field_width lib/vsprintf.c:2654 [inline] (P) vsnprintf+0xb9c/0xd10 lib/vsprintf.c:2918 (P) va_format lib/vsprintf.c:1725 [inline] pointer+0x5e8/0x6b4 lib/vsprintf.c:2577 vsnprintf+0x618/0xd10 lib/vsprintf.c:2953 vprintk_store+0x344/0xb94 kernel/printk/printk.c:2307 vprintk_emit+0x1bc/0x514 kernel/printk/printk.c:2455 dev_vprintk_emit+0x2ec/0x3b4 drivers/base/core.c:5000 dev_printk_emit+0xe0/0x130 drivers/base/core.c:5011 __dynamic_dev_dbg+0x1b4/0x254 lib/dynamic_debug.c:904 dtv_property_process_get+0x26bc/0x2838 drivers/media/dvb-core/dvb_frontend.c:1595 dvb_get_property drivers/media/dvb-core/dvb_frontend.c:2397 [inline] dvb_frontend_handle_ioctl+0x1644/0x2424 drivers/media/dvb-core/dvb_frontend.c:2478 dvb_frontend_do_ioctl+0x124/0x278 drivers/media/dvb-core/dvb_frontend.c:2101 dvb_usercopy+0x2a4/0x4d4 drivers/media/dvb-core/dvbdev.c:996 dvb_frontend_ioctl+0x68/0x8c drivers/media/dvb-core/dvb_frontend.c:2115 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 irq event stamp: 1744 hardirqs last enabled at (1743): [] vprintk_store+0x924/0xb94 kernel/printk/printk.c:2385 hardirqs last disabled at (1744): [] vprintk_store+0x13c/0xb94 kernel/printk/printk.c:2287 softirqs last enabled at (1706): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (1706): [] put_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:251 [inline] softirqs last enabled at (1706): [] fpsimd_restore_current_state+0x39c/0x9c8 arch/arm64/kernel/fpsimd.c:1780 softirqs last disabled at (1704): [] local_bh_disable include/linux/bottom_half.h:20 [inline] softirqs last disabled at (1704): [] get_cpu_fpsimd_context arch/arm64/kernel/fpsimd.c:234 [inline] softirqs last disabled at (1704): [] fpsimd_restore_current_state+0x44/0x9c8 arch/arm64/kernel/fpsimd.c:1773 ---[ end trace 0000000000000000 ]--- ================================================================== BUG: KASAN: slab-out-of-bounds in hex_string+0x274/0x364 lib/vsprintf.c:1209 Read of size 1 at addr ffff0000d876a130 by task syz.6.528/7845 CPU: 1 UID: 0 PID: 7845 Comm: syz.6.528 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xb0/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0x8c/0xc4 mm/kasan/report.c:595 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378 hex_string+0x274/0x364 lib/vsprintf.c:1209 pointer+0x1a8/0x6b4 lib/vsprintf.c:2548 vsnprintf+0x618/0xd10 lib/vsprintf.c:2953 va_format lib/vsprintf.c:1725 [inline] pointer+0x5e8/0x6b4 lib/vsprintf.c:2577 vsnprintf+0x618/0xd10 lib/vsprintf.c:2953 vscnprintf+0x6c/0xd4 lib/vsprintf.c:3018 printk_sprint+0xc0/0x774 kernel/printk/printk.c:2222 vprintk_store+0x714/0xb94 kernel/printk/printk.c:2364 vprintk_emit+0x1bc/0x514 kernel/printk/printk.c:2455 dev_vprintk_emit+0x2ec/0x3b4 drivers/base/core.c:5000 dev_printk_emit+0xe0/0x130 drivers/base/core.c:5011 __dynamic_dev_dbg+0x1b4/0x254 lib/dynamic_debug.c:904 dtv_property_process_get+0x26bc/0x2838 drivers/media/dvb-core/dvb_frontend.c:1595 dvb_get_property drivers/media/dvb-core/dvb_frontend.c:2397 [inline] dvb_frontend_handle_ioctl+0x1644/0x2424 drivers/media/dvb-core/dvb_frontend.c:2478 dvb_frontend_do_ioctl+0x124/0x278 drivers/media/dvb-core/dvb_frontend.c:2101 dvb_usercopy+0x2a4/0x4d4 drivers/media/dvb-core/dvbdev.c:996 dvb_frontend_ioctl+0x68/0x8c drivers/media/dvb-core/dvb_frontend.c:2115 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Allocated by task 7845: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:78 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:570 poison_kmalloc_redzone mm/kasan/common.c:398 [inline] __kasan_kmalloc+0x9c/0xb4 mm/kasan/common.c:415 kasan_kmalloc include/linux/kasan.h:263 [inline] __do_kmalloc_node mm/slub.c:5414 [inline] __kmalloc_node_track_caller_noprof+0x440/0x6e0 mm/slub.c:5545 memdup_user+0x44/0xec mm/util.c:221 memdup_array_user include/linux/string.h:39 [inline] dvb_get_property drivers/media/dvb-core/dvb_frontend.c:2380 [inline] dvb_frontend_handle_ioctl+0xb8c/0x2424 drivers/media/dvb-core/dvb_frontend.c:2478 dvb_frontend_do_ioctl+0x124/0x278 drivers/media/dvb-core/dvb_frontend.c:2101 dvb_usercopy+0x2a4/0x4d4 drivers/media/dvb-core/dvbdev.c:996 dvb_frontend_ioctl+0x68/0x8c drivers/media/dvb-core/dvb_frontend.c:2115 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __arm64_sys_ioctl+0x154/0x1cc fs/ioctl.c:583 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 The buggy address belongs to the object at ffff0000d876a000 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 0 bytes to the right of allocated 304-byte region [ffff0000d876a000, ffff0000d876a130) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118768 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0001c80 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0001c80 dead000000000100 dead000000000122 head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 05ffc00000000002 fffffdffc361da01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d876a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000d876a080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000d876a100: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc ^ ffff0000d876a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d876a200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================