[ 28.962504] BUG: Bad rss-counter state mm:00000000731f9ef8 type:MM_FILEPAGES val:33 [ 28.962645] BUG: Bad rss-counter state mm:00000000731f9ef8 type:MM_ANONPAGES val:22 [ 29.262775] ================================================================== [ 29.263676] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.264602] Read of size 8 at addr ffff88801bc25df0 by task sshd/220 [ 29.265360] [ 29.265578] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.266550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.267520] Call Trace: [ 29.267841] [ 29.268144] dump_stack_lvl+0x91/0xf0 [ 29.268636] print_report+0xcc/0x620 [ 29.269123] ? __virt_addr_valid+0x102/0x340 [ 29.269681] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.270320] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.270932] kasan_report+0xbe/0xf0 [ 29.271407] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.272028] vma_interval_tree_remove+0xc75/0xec0 [ 29.272626] vma_prepare+0xc54/0x11a0 [ 29.273098] __split_vma+0x5af/0x950 [ 29.273566] ? __pfx___split_vma+0x10/0x10 [ 29.274094] ? find_held_lock+0x2c/0x110 [ 29.274625] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.275192] ? lock_is_held_type+0x9f/0x120 [ 29.275730] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.276340] ? mtree_range_walk+0x632/0x900 [ 29.276889] ? mas_walk+0x5c7/0x7c0 [ 29.277358] do_vmi_munmap+0x1f1/0x2b0 [ 29.277850] mmap_region+0x1f9/0x2660 [ 29.278351] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.278860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.279576] ? __pfx_lock_acquire+0x10/0x10 [ 29.280114] ? __pfx_mmap_region+0x10/0x10 [ 29.280639] ? security_mmap_addr+0x7d/0xa0 [ 29.281170] ? get_unmapped_area+0x1f5/0x3f0 [ 29.281723] do_mmap+0x854/0xf00 [ 29.282160] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.282660] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.283222] ksys_mmap_pgoff+0x3af/0x500 [ 29.283727] do_syscall_64+0x3f/0x90 [ 29.284205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.284859] RIP: 0033:0x7f1106a2fd82 [ 29.285316] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 29.287450] RSP: 002b:00007ffcae13ad18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.288349] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1106a2fd82 [ 29.289202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1105e69000 [ 29.290047] RBP: 00007f1105e69000 R08: 0000000000000009 R09: 0000000000001000 [ 29.290898] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1b2039ec0 [ 29.291757] R13: 00007ffcae13ad30 R14: 00007ffcae13ad60 R15: 00007ffcae13b0c0 [ 29.292621] [ 29.292910] [ 29.293128] Allocated by task 207: [ 29.293552] kasan_save_stack+0x22/0x50 [ 29.294049] kasan_set_track+0x25/0x30 [ 29.294549] __kasan_slab_alloc+0x59/0x70 [ 29.295074] kmem_cache_alloc+0x16b/0x370 [ 29.295588] vm_area_dup+0x20/0x160 [ 29.296036] __split_vma+0x170/0x950 [ 29.296499] split_vma+0xc6/0x110 [ 29.296945] mprotect_fixup+0x8d2/0xb30 [ 29.297445] do_mprotect_pkey+0x87e/0xd40 [ 29.297973] __x64_sys_mprotect+0x78/0xc0 [ 29.298524] do_syscall_64+0x3f/0x90 [ 29.299026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.299696] [ 29.299921] Freed by task 204: [ 29.300339] kasan_save_stack+0x22/0x50 [ 29.300876] kasan_set_track+0x25/0x30 [ 29.301398] kasan_save_free_info+0x2b/0x50 [ 29.301954] __kasan_slab_free+0x10a/0x190 [ 29.302527] kmem_cache_free+0x10d/0x4d0 [ 29.303056] rcu_core+0x8c8/0x2860 [ 29.303525] __do_softirq+0x1b7/0x7d4 [ 29.304024] [ 29.304244] Last potentially related work creation: [ 29.304850] kasan_save_stack+0x22/0x50 [ 29.305369] __kasan_record_aux_stack+0x8e/0xa0 [ 29.305971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.306673] remove_vma+0x139/0x170 [ 29.307141] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.307713] do_vmi_munmap+0x1f1/0x2b0 [ 29.308224] __vm_munmap+0x138/0x3a0 [ 29.308708] __x64_sys_munmap+0x59/0x80 [ 29.309234] do_syscall_64+0x3f/0x90 [ 29.309731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.310403] [ 29.310631] The buggy address belongs to the object at ffff88801bc25d98 [ 29.310631] which belongs to the cache vm_area_struct of size 168 [ 29.312180] The buggy address is located 88 bytes inside of [ 29.312180] freed 168-byte region [ffff88801bc25d98, ffff88801bc25e40) [ 29.313655] [ 29.313870] The buggy address belongs to the physical page: [ 29.314570] page:00000000df05c556 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc25 [ 29.315704] memcg:ffff88801a3b9a01 [ 29.316145] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.316814] page_type: 0xffffffff() [ 29.317278] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.318234] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3b9a01 [ 29.319175] page dumped because: kasan: bad access detected [ 29.319855] [ 29.320074] Memory state around the buggy address: [ 29.320669] ffff88801bc25c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.321562] ffff88801bc25d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.322456] >ffff88801bc25d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.323336] ^ [ 29.324175] ffff88801bc25e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.325056] ffff88801bc25e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.325932] ================================================================== [ 29.326984] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.257260] BUG: Bad rss-counter state mm:000000004a15b80e type:MM_FILEPAGES val:33 [ 31.258626] BUG: Bad rss-counter state mm:000000004a15b80e type:MM_ANONPAGES val:22 [ 31.720777] BUG: Bad rss-counter state mm:00000000b1325757 type:MM_FILEPAGES val:33 [ 31.721771] BUG: Bad rss-counter state mm:00000000b1325757 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11505' (ECDSA) to the list of known hosts. 2023/06/19 12:10:07 fuzzer started 2023/06/19 12:10:08 dialing manager at localhost:44161 2023/06/19 12:10:08 checking machine... 2023/06/19 12:10:08 checking revisions... [ 32.469000] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:10:08 testing simple program... [ 32.527906] cgroup: Unknown subsys name 'net' [ 32.577869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:10:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=1ffff1100d9c135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=0000000000000005 R15=ffff88806ce09a98 RIP=ffffffff81130b54 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f81b275a900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f81b2d11618 CR3=000000001770a000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff7fffffffffff RBX=0000000000000001 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff8880087ff598 R8 =0000000000000000 R9 =ffffed1001f80730 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800fc03a10 R13=ffff88800fc039c0 R14=ffffffff81f59e7d R15=0000000000000000 RIP=ffffffff8180eef9 RFL=00000016 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f325ec06900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=000055e92cce47e0 CR3=000000000d43a000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000ff000000ff00 XMM02=00000000000000510000000065636976 XMM03=79732f6563696c732e6d65747379732f XMM04=2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e2e XMM05=000055e92cd07bc0000055e92cd82f40 XMM06=00000000000000210000000000000000 XMM07=00000000000000000000000000000000 XMM08=65784500657250747261745363657845 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000