BUG: unable to handle page fault for address: fffffbfffbc00000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffe4067 P4D 23ffe4067 PUD 23ffe3067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 5355 Comm: syz.2.13 Not tainted 6.12.0-rc2-next-20241008-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0000:ffffc900045573d8 EFLAGS: 00010286 RAX: 0000000000000001 RBX: 1ffffffffbc00000 RCX: ffffffff81cf65ff RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffde000000 RBP: ffffffffffffffff R08: ffffffffde000003 R09: 1ffffffffbc00000 R10: dffffc0000000000 R11: fffffbfffbc00000 R12: ffffffffde000000 R13: 0000000000000004 R14: dffffc0000000001 R15: fffffbfffbc00001 FS: 00005555678d4500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfffbc00000 CR3: 0000000021f4a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_read include/linux/instrumented.h:26 [inline] copy_from_kernel_nofault+0x6f/0x2f0 mm/maccess.c:35 bpf_probe_read_kernel_common include/linux/bpf.h:2960 [inline] ____bpf_probe_read_compat kernel/trace/bpf_trace.c:294 [inline] bpf_probe_read_compat+0x10f/0x180 kernel/trace/bpf_trace.c:287 bpf_prog_577616742b6817b3+0x46/0x48 bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2318 [inline] bpf_trace_run3+0x33a/0x5a0 kernel/trace/bpf_trace.c:2360 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x355/0x420 mm/slub.c:4706 jbd2_free_handle include/linux/jbd2.h:1608 [inline] jbd2_journal_stop+0x902/0xd80 fs/jbd2/transaction.c:1958 __ext4_journal_stop+0xfd/0x1a0 fs/ext4/ext4_jbd2.c:134 __mark_inode_dirty+0x2ee/0xe90 fs/fs-writeback.c:2493 generic_update_time fs/inode.c:2125 [inline] inode_update_time fs/inode.c:2138 [inline] __file_update_time fs/inode.c:2380 [inline] file_update_time+0x3d2/0x450 fs/inode.c:2410 ext4_page_mkwrite+0x206/0xdf0 fs/ext4/inode.c:6102 do_page_mkwrite+0x198/0x480 mm/memory.c:3170 do_shared_fault mm/memory.c:5375 [inline] do_fault mm/memory.c:5437 [inline] do_pte_missing mm/memory.c:3973 [inline] handle_pte_fault+0x1235/0x6830 mm/memory.c:5778 __handle_mm_fault mm/memory.c:5921 [inline] handle_mm_fault+0x1106/0x1bb0 mm/memory.c:6089 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7f7680a5cb46 Code: 4d 89 f5 41 83 e5 03 0f 85 f7 01 00 00 48 89 df be 04 00 00 00 e8 ca b5 fe ff 48 8b 43 38 83 43 28 04 48 8d 50 fc 48 89 53 38 <89> 68 fc 8b 43 28 48 83 c4 38 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f RSP: 002b:00007fff7baa4f40 EFLAGS: 00010202 RAX: 0000001b32a20000 RBX: 00007f7681865720 RCX: 0000001b32620210 RDX: 0000001b32a1fffc RSI: 00000000003ffdf0 RDI: 00007f7681865700 RBP: 0000000000000000 R08: 00007f7680d20000 R09: 00007f7680d22000 R10: 00007f7681865700 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000000033c4 Modules linked in: CR2: fffffbfffbc00000 ---[ end trace 0000000000000000 ]--- RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0000:ffffc900045573d8 EFLAGS: 00010286 RAX: 0000000000000001 RBX: 1ffffffffbc00000 RCX: ffffffff81cf65ff RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffde000000 RBP: ffffffffffffffff R08: ffffffffde000003 R09: 1ffffffffbc00000 R10: dffffc0000000000 R11: fffffbfffbc00000 R12: ffffffffde000000 R13: 0000000000000004 R14: dffffc0000000001 R15: fffffbfffbc00001 FS: 00005555678d4500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfffbc00000 CR3: 0000000021f4a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 4f 8d fisttps -0x73(%rdi) 3: 3c 31 cmp $0x31,%al 5: 4c 89 fd mov %r15,%rbp 8: 4c 29 dd sub %r11,%rbp b: 48 83 fd 10 cmp $0x10,%rbp f: 7f 29 jg 0x3a 11: 48 85 ed test %rbp,%rbp 14: 0f 84 3e 01 00 00 je 0x158 1a: 4c 89 cd mov %r9,%rbp 1d: 48 f7 d5 not %rbp 20: 48 01 dd add %rbx,%rbp * 23: 41 80 3b 00 cmpb $0x0,(%r11) <-- trapping instruction 27: 0f 85 c9 01 00 00 jne 0x1f6 2d: 49 ff c3 inc %r11 30: 48 ff c5 inc %rbp 33: 75 ee jne 0x23 35: e9 .byte 0xe9 36: 1e (bad) 37: 01 00 add %eax,(%rax)