syzkaller login: [ 43.485340] BUG: Bad rss-counter state mm:000000003894b890 type:MM_FILEPAGES val:33 [ 43.486635] BUG: Bad rss-counter state mm:000000003894b890 type:MM_ANONPAGES val:22 [ 43.645740] ================================================================== [ 43.646842] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.647962] Read of size 8 at addr ffff88801979b310 by task sshd/218 [ 43.649024] [ 43.649281] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.650326] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.651536] Call Trace: [ 43.651919] [ 43.652259] dump_stack_lvl+0x91/0xf0 [ 43.652849] print_report+0xcc/0x620 [ 43.653428] ? __virt_addr_valid+0x102/0x340 [ 43.654093] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.654831] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.655573] kasan_report+0xbe/0xf0 [ 43.656142] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.656901] vma_interval_tree_remove+0xc75/0xec0 [ 43.657634] vma_prepare+0xc54/0x11a0 [ 43.658210] __split_vma+0x5af/0x950 [ 43.658787] ? __pfx___split_vma+0x10/0x10 [ 43.659433] ? find_held_lock+0x2c/0x110 [ 43.660059] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.660756] ? lock_is_held_type+0x9f/0x120 [ 43.661419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.662160] ? mtree_range_walk+0x632/0x900 [ 43.662823] ? mas_walk+0x5c7/0x7c0 [ 43.663392] do_vmi_munmap+0x1f1/0x2b0 [ 43.663975] mmap_region+0x1f9/0x2660 [ 43.664554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.665183] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.666050] ? __pfx_lock_acquire+0x10/0x10 [ 43.666695] ? __pfx_mmap_region+0x10/0x10 [ 43.667328] ? security_mmap_addr+0x7d/0xa0 [ 43.667961] ? get_unmapped_area+0x1f5/0x3f0 [ 43.668627] do_mmap+0x854/0xf00 [ 43.669186] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.669785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.670464] ksys_mmap_pgoff+0x3af/0x500 [ 43.671075] do_syscall_64+0x3f/0x90 [ 43.671642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.672433] RIP: 0033:0x7f4933123d82 [ 43.672940] 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 [ 43.674941] RSP: 002b:00007ffdc8ed3028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.675795] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4933123d82 [ 43.676613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f493255d000 [ 43.677421] RBP: 00007f493255d000 R08: 0000000000000009 R09: 0000000000001000 [ 43.678222] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559694d46ec0 [ 43.679073] R13: 00007ffdc8ed3040 R14: 00007ffdc8ed3070 R15: 00007ffdc8ed33d0 [ 43.679920] [ 43.680209] [ 43.680434] Allocated by task 211: [ 43.680883] kasan_save_stack+0x22/0x50 [ 43.681392] kasan_set_track+0x25/0x30 [ 43.681886] __kasan_slab_alloc+0x59/0x70 [ 43.682425] kmem_cache_alloc+0x16b/0x370 [ 43.682942] vm_area_dup+0x20/0x160 [ 43.683395] __split_vma+0x170/0x950 [ 43.683867] split_vma+0xc6/0x110 [ 43.684310] mprotect_fixup+0x8d2/0xb30 [ 43.684826] do_mprotect_pkey+0x87e/0xd40 [ 43.685358] __x64_sys_mprotect+0x78/0xc0 [ 43.685889] do_syscall_64+0x3f/0x90 [ 43.686375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.687017] [ 43.687228] Freed by task 211: [ 43.687616] kasan_save_stack+0x22/0x50 [ 43.688115] kasan_set_track+0x25/0x30 [ 43.688602] kasan_save_free_info+0x2b/0x50 [ 43.689145] __kasan_slab_free+0x10a/0x190 [ 43.689673] kmem_cache_free+0x10d/0x4d0 [ 43.690177] rcu_core+0x8c8/0x2860 [ 43.690619] __do_softirq+0x1b7/0x7d4 [ 43.691088] [ 43.691303] Last potentially related work creation: [ 43.691882] kasan_save_stack+0x22/0x50 [ 43.692383] __kasan_record_aux_stack+0x8e/0xa0 [ 43.692975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.693616] remove_vma+0x139/0x170 [ 43.694059] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.694608] do_vmi_munmap+0x1f1/0x2b0 [ 43.695090] __vm_munmap+0x138/0x3a0 [ 43.695555] __x64_sys_munmap+0x59/0x80 [ 43.696047] do_syscall_64+0x3f/0x90 [ 43.696518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.697177] [ 43.697391] Second to last potentially related work creation: [ 43.698071] kasan_save_stack+0x22/0x50 [ 43.698574] __kasan_record_aux_stack+0x8e/0xa0 [ 43.699140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.699772] remove_vma+0x139/0x170 [ 43.700223] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.700799] do_vmi_munmap+0x1f1/0x2b0 [ 43.701278] mmap_region+0x1f9/0x2660 [ 43.701753] do_mmap+0x854/0xf00 [ 43.702180] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.702663] ksys_mmap_pgoff+0x3af/0x500 [ 43.703164] do_syscall_64+0x3f/0x90 [ 43.703630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.704270] [ 43.704481] The buggy address belongs to the object at ffff88801979b2b8 [ 43.704481] which belongs to the cache vm_area_struct of size 168 [ 43.705971] The buggy address is located 88 bytes inside of [ 43.705971] freed 168-byte region [ffff88801979b2b8, ffff88801979b360) [ 43.707390] [ 43.707605] The buggy address belongs to the physical page: [ 43.708274] page:000000006feb8695 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1979b [ 43.709395] memcg:ffff88800c691601 [ 43.709825] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.710469] page_type: 0xffffffff() [ 43.710916] raw: 0100000000000200 ffff88800879fc80 ffffea000039db00 dead000000000002 [ 43.711835] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c691601 [ 43.712755] page dumped because: kasan: bad access detected [ 43.713407] [ 43.713619] Memory state around the buggy address: [ 43.714206] ffff88801979b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.715052] ffff88801979b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.715909] >ffff88801979b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.716779] ^ [ 43.717247] ffff88801979b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.718091] ffff88801979b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 43.718939] ================================================================== [ 43.719914] Disabling lock debugging due to kernel taint [ 45.604312] BUG: Bad rss-counter state mm:00000000d7da30c0 type:MM_FILEPAGES val:33 [ 45.605257] BUG: Bad rss-counter state mm:00000000d7da30c0 type:MM_ANONPAGES val:22 [ 46.076115] BUG: Bad rss-counter state mm:0000000008d02ced type:MM_FILEPAGES val:33 [ 46.077217] BUG: Bad rss-counter state mm:0000000008d02ced type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22614' (ECDSA) to the list of known hosts. 2023/06/19 17:50:55 fuzzer started 2023/06/19 17:50:55 dialing manager at localhost:44161 2023/06/19 17:50:55 checking machine... 2023/06/19 17:50:55 checking revisions... [ 46.687923] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:50:55 testing simple program... [ 46.719560] cgroup: Unknown subsys name 'net' [ 46.756059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:50:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007fff57051db8 CR3=0000000005482000 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=00007f7cc45d9510000055bffaed5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff856529e0 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=00007f5a918f42fd RSP=ffff88800da37170 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f5a918f42fd R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e2a 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 00007f5a9102a900 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=00007faf1e0b8650 CR3=000000000cb46000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=bc22a9917a1b07f500000000000ae988 XMM05=b53258e36524182c0000000000135d10 XMM06=751b9502027dc0b90000000000134838 XMM07=fb795ef6d65770560000000000123cc8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000