loop0: p23 size 108986237 extends beyond EOD, truncated loop0: p24 size 108986237 extends beyond EOD, ================================================================== BUG: KCSAN: data-race in data_push_tail / string write to 0xffffffff88bfda4a of 1 bytes by task 6638 on cpu 0: string_nocheck lib/vsprintf.c:636 [inline] string+0x17f/0x210 lib/vsprintf.c:714 vsnprintf+0x537/0x890 lib/vsprintf.c:2843 vscnprintf+0x42/0x90 lib/vsprintf.c:2908 printk_sprint+0x30/0x2d0 kernel/printk/printk.c:2216 vprintk_store+0x589/0x870 kernel/printk/printk.c:2336 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2408 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x7a/0xa0 kernel/printk/printk.c:2457 blk_add_partition block/partitions/core.c:549 [inline] blk_add_partitions block/partitions/core.c:633 [inline] bdev_disk_changed+0x87f/0xb90 block/partitions/core.c:693 loop_reread_partitions drivers/block/loop.c:537 [inline] loop_set_status+0x4a9/0x540 drivers/block/loop.c:1304 lo_ioctl+0x807/0x1400 blkdev_ioctl+0x359/0x450 block/ioctl.c:693 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xc9/0x140 fs/ioctl.c:892 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:892 x64_sys_call+0x1690/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffffffff88bfda48 of 8 bytes by task 6640 on cpu 1: data_make_reusable kernel/printk/printk_ringbuffer.c:594 [inline] data_push_tail+0x102/0x430 kernel/printk/printk_ringbuffer.c:679 data_alloc+0xbe/0x2c0 kernel/printk/printk_ringbuffer.c:1054 prb_reserve+0x85e/0xb60 kernel/printk/printk_ringbuffer.c:1669 vprintk_store+0x558/0x870 kernel/printk/printk.c:2326 vprintk_emit+0x15e/0x680 kernel/printk/printk.c:2408 vprintk_default+0x26/0x30 kernel/printk/printk.c:2447 vprintk+0x1d/0x30 kernel/printk/printk_safe.c:82 _printk+0x7a/0xa0 kernel/printk/printk.c:2457 blk_add_partition block/partitions/core.c:549 [inline] blk_add_partitions block/partitions/core.c:633 [inline] bdev_disk_changed+0x87f/0xb90 block/partitions/core.c:693 loop_reread_partitions drivers/block/loop.c:537 [inline] loop_set_status+0x4a9/0x540 drivers/block/loop.c:1304 lo_ioctl+0x807/0x1400 blkdev_ioctl+0x359/0x450 block/ioctl.c:693 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xc9/0x140 fs/ioctl.c:892 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:892 x64_sys_call+0x1690/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000000fffffb77 -> 0x70203a34706f6f6c Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 6640 Comm: syz.0.1222 Not tainted 6.13.0-syzkaller-07259-g0f8e26b38d7a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 ================================================================== truncated loop0: p25 size 108986237 extends beyond EOD, truncated loop0: p26 size 108986237 extends beyond EOD, truncated loop0: p27 size 108986237 extends beyond EOD, truncated loop0: p28 size 108986237 extends beyond EOD, truncated loop0: p29 size 108986237 extends beyond EOD, truncated loop0: p30 size 108986237 extends beyond EOD, truncated loop0: p31 size 108986237 extends beyond EOD, truncated loop0: p32 size 108986237 extends beyond EOD, truncated loop0: p33 size 108986237 extends beyond EOD, truncated loop0: p34 size 108986237 extends beyond EOD, truncated loop0: p35 size 108986237 extends beyond EOD, truncated loop0: p36 size 108986237 extends beyond EOD, truncated loop0: p37 size 108986237 extends beyond EOD, truncated loop0: p38 size 108986237 extends beyond EOD, truncated loop0: p39 size 108986237 extends beyond EOD, truncated loop0: p40 size 108986237 extends beyond EOD, truncated loop0: p41 size 108986237 extends beyond EOD, truncated loop0: p42 size 108986237 extends beyond EOD, truncated loop0: p43 size 108986237 extends beyond EOD, truncated loop0: p44 size 108986237 extends beyond EOD, truncated loop0: p45 size 108986237 extends beyond EOD, truncated loop0: p46 size 108986237 extends beyond EOD, truncated loop0: p47 size 108986237 extends beyond EOD, truncated loop0: p48 size 108986237 extends beyond EOD, truncated loop0: p49 size 108986237 extends beyond EOD, truncated loop0: p50 size 108986237 extends beyond EOD, truncated loop0: p51 size 108986237 extends beyond EOD, truncated loop0: p52 size 108986237 extends beyond EOD, truncated loop0: p53 size 108986237 extends beyond EOD, truncated loop0: p54 size 108986237 extends beyond EOD, truncated loop0: p55 size 108986237 extends beyond EOD, truncated loop0: p56 size 108986237 extends beyond EOD, truncated loop0: p57 size 108986237 extends beyond EOD, truncated loop0: p58 size 108986237 extends beyond EOD, truncated loop0: p59 size 108986237 extends beyond EOD, truncated loop0: p60 size 108986237 extends beyond EOD, truncated loop0: p61 size 108986237 extends beyond EOD, truncated loop0: p62 size 108986237 extends beyond EOD, truncated loop0: p63 size 108986237 extends beyond EOD, truncated loop0: p64 size 108986237 extends beyond EOD, truncated loop0: p65 size 108986237 extends beyond EOD, truncated loop0: p66 size 108986237 extends beyond EOD, truncated loop0: p67 size 108986237 extends beyond EOD, truncated loop0: p68 size 108986237 extends beyond EOD, truncated loop0: p69 size 108986237 extends beyond EOD, truncated loop0: p70 size 108986237 extends beyond EOD, truncated loop0: p71 size 108986237 extends beyond EOD, truncated loop0: p72 size 108986237 extends beyond EOD, truncated loop0: p73 size 108986237 extends beyond EOD, truncated loop0: p74 size 108986237 extends beyond EOD, truncated loop0: p75 size 108986237 extends beyond EOD, truncated loop0: p76 size 108986237 extends beyond EOD, truncated loop0: p77 size 108986237 extends beyond EOD, truncated loop0: p78 size 108986237 extends beyond EOD, truncated loop0: p79 size 108986237 extends beyond EOD, truncated loop0: p80 size 108986237 extends beyond EOD, truncated loop0: p81 size 108986237 extends beyond EOD, truncated loop0: p82 size 108986237 extends beyond EOD, truncated loop0: p83 size 108986237 extends beyond EOD, truncated loop0: p84 size 108986237 extends beyond EOD, truncated loop0: p85 size 108986237 extends beyond EOD, truncated loop0: p86 size 108986237 extends beyond EOD, truncated loop0: p87 size 108986237 extends beyond EOD, truncated loop0: p88 size 108986237 extends beyond EOD, truncated loop0: p89 size 108986237 extends beyond EOD, truncated loop0: p90 size 108986237 extends beyond EOD, truncated loop0: p91 size 108986237 extends beyond EOD, truncated loop0: p92 size 108986237 extends beyond EOD, truncated loop0: p93 size 108986237 extends beyond EOD, truncated loop0: p94 size 108986237 extends beyond EOD, truncated loop0: p95 size 108986237 extends beyond EOD, truncated loop0: p96 size 108986237 extends beyond EOD, truncated loop0: p97 size 108986237 extends beyond EOD, truncated loop0: p98 size 108986237 extends beyond EOD, truncated loop0: p99 size 108986237 extends beyond EOD, truncated loop0: p100 size 108986237 extends beyond EOD, truncated loop0: p101 size 108986237 extends beyond EOD, truncated loop0: p102 size 108986237 extends beyond EOD, truncated loop0: p103 size 108986237 extends beyond EOD, truncated loop0: p104 size 108986237 extends beyond EOD, truncated loop0: p105 size 108986237 extends beyond EOD, truncated loop0: p106 size 108986237 extends beyond EOD, truncated loop0: p107 size 108986237 extends beyond EOD, truncated loop0: p108 size 108986237 extends beyond EOD, truncated loop0: p109 size 108986237 extends beyond EOD, truncated loop0: p110 size 108986237 extends beyond EOD, truncated loop0: 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