================================================================== BUG: KASAN: user-memory-access in instrument_atomic_read include/linux/instrumented.h:71 [inline] BUG: KASAN: user-memory-access in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] BUG: KASAN: user-memory-access in set_buffer_dirty include/linux/buffer_head.h:121 [inline] BUG: KASAN: user-memory-access in block_dirty_folio+0x9c/0x1d0 fs/buffer.c:627 Read of size 8 at addr 0000000000150000 by task syz-executor.2/7218 CPU: 1 PID: 7218 Comm: syz-executor.2 Not tainted 5.18.0-rc4-syzkaller-00192-g38d741cb70b3 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_report mm/kasan/report.c:432 [inline] kasan_report.cold+0x61/0x1c6 mm/kasan/report.c:491 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] set_buffer_dirty include/linux/buffer_head.h:121 [inline] block_dirty_folio+0x9c/0x1d0 fs/buffer.c:627 folio_mark_dirty+0xc1/0x140 mm/page-writeback.c:2630 filemap_page_mkwrite+0x50b/0x750 mm/filemap.c:3431 do_page_mkwrite+0x1a7/0x920 mm/memory.c:2885 wp_page_shared mm/memory.c:3208 [inline] do_wp_page+0x100a/0x2030 mm/memory.c:3325 handle_pte_fault mm/memory.c:4645 [inline] __handle_mm_fault+0x1dc8/0x4150 mm/memory.c:4763 handle_mm_fault+0x1c8/0x790 mm/memory.c:4861 faultin_page mm/gup.c:878 [inline] __get_user_pages+0x4f7/0xf10 mm/gup.c:1099 __get_user_pages_locked mm/gup.c:1289 [inline] __get_user_pages_remote+0x18f/0x840 mm/gup.c:1934 pin_user_pages_remote+0x63/0x90 mm/gup.c:2948 process_vm_rw_single_vec mm/process_vm_access.c:105 [inline] process_vm_rw_core.constprop.0+0x445/0x990 mm/process_vm_access.c:215 process_vm_rw+0x29c/0x300 mm/process_vm_access.c:283 __do_sys_process_vm_writev mm/process_vm_access.c:303 [inline] __se_sys_process_vm_writev mm/process_vm_access.c:298 [inline] __ia32_sys_process_vm_writev+0xdc/0x1b0 mm/process_vm_access.c:298 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f36549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f105cc EFLAGS: 00000296 ORIG_RAX: 000000000000015c RAX: ffffffffffffffda RBX: 0000000000000342 RCX: 0000000020c22000 RDX: 0000000000000001 RSI: 0000000020c22fa0 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ================================================================== ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi