BUG: unable to handle page fault for address: fffffbfff3f85b08 #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: 1 UID: 0 PID: 6100 Comm: syz.1.28 Not tainted 6.14.0-rc2-syzkaller-00034-gfebbc555cf0f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 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:ffffc90004e2f460 EFLAGS: 00010086 RAX: 000000000172ce01 RBX: 1ffffffff3f85b08 RCX: ffffffff819abc04 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9fc2d840 RBP: ffffffffffffffff R08: ffffffff9fc2d847 R09: 1ffffffff3f85b08 R10: dffffc0000000000 R11: fffffbfff3f85b08 R12: ffff888031b128d4 R13: ffff888031b11e00 R14: dffffc0000000001 R15: fffffbfff3f85b09 FS: 00007fae13fa06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff3f85b08 CR3: 000000002422c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] __lock_acquire+0xc94/0x2100 kernel/locking/lockdep.c:5198 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 local_lock_acquire+0x20/0x80 include/linux/local_lock_internal.h:29 ___slab_alloc+0x119d/0x14a0 mm/slub.c:3875 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4171 ext4_mb_add_groupinfo+0x6bf/0xe70 fs/ext4/mballoc.c:3356 ext4_mb_init_backend fs/ext4/mballoc.c:3435 [inline] ext4_mb_init+0x17f4/0x2870 fs/ext4/mballoc.c:3733 __ext4_fill_super fs/ext4/super.c:5551 [inline] ext4_fill_super+0x57f5/0x66f0 fs/ext4/super.c:5722 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3560 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fae1318e58a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fae13f9fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fae13f9fef0 RCX: 00007fae1318e58a RDX: 0000400000000040 RSI: 0000400000000080 RDI: 00007fae13f9feb0 RBP: 0000400000000040 R08: 00007fae13f9fef0 R09: 000000000020081e R10: 000000000020081e R11: 0000000000000246 R12: 0000400000000080 R13: 00007fae13f9feb0 R14: 00000000000004ef R15: 00004000000020c0 Modules linked in: CR2: fffffbfff3f85b08 ---[ 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:ffffc90004e2f460 EFLAGS: 00010086 RAX: 000000000172ce01 RBX: 1ffffffff3f85b08 RCX: ffffffff819abc04 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9fc2d840 RBP: ffffffffffffffff R08: ffffffff9fc2d847 R09: 1ffffffff3f85b08 R10: dffffc0000000000 R11: fffffbfff3f85b08 R12: ffff888031b128d4 R13: ffff888031b11e00 R14: dffffc0000000001 R15: fffffbfff3f85b09 FS: 00007fae13fa06c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff3f85b08 CR3: 000000002422c000 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)