syzkaller login: [ 32.399707] BUG: Bad rss-counter state mm:0000000061522a38 type:MM_FILEPAGES val:33 [ 32.401393] BUG: Bad rss-counter state mm:0000000061522a38 type:MM_ANONPAGES val:22 [ 32.575488] ================================================================== [ 32.576354] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.577251] Read of size 8 at addr ffff88800e493c20 by task sshd/225 [ 32.578388] [ 32.578696] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.579941] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.581381] Call Trace: [ 32.581852] [ 32.582273] dump_stack_lvl+0x91/0xf0 [ 32.582929] print_report+0xcc/0x620 [ 32.583357] ? __virt_addr_valid+0x102/0x340 [ 32.583856] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.584423] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.584980] kasan_report+0xbe/0xf0 [ 32.585400] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.585962] vma_interval_tree_remove+0xc75/0xec0 [ 32.586517] vma_prepare+0xc54/0x11a0 [ 32.586951] __split_vma+0x5af/0x950 [ 32.587382] ? __pfx___split_vma+0x10/0x10 [ 32.587859] ? find_held_lock+0x2c/0x110 [ 32.588338] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.588846] ? lock_is_held_type+0x9f/0x120 [ 32.589333] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.589885] ? mtree_range_walk+0x632/0x900 [ 32.590367] ? mas_walk+0x5c7/0x7c0 [ 32.590719] do_vmi_munmap+0x1f1/0x2b0 [ 32.591043] mmap_region+0x1f9/0x2660 [ 32.591286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.591548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.591916] ? __pfx_lock_acquire+0x10/0x10 [ 32.592185] ? __pfx_mmap_region+0x10/0x10 [ 32.592451] ? security_mmap_addr+0x7d/0xa0 [ 32.592726] ? get_unmapped_area+0x1f5/0x3f0 [ 32.593003] do_mmap+0x854/0xf00 [ 32.593224] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.593474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.593775] ksys_mmap_pgoff+0x3af/0x500 [ 32.594033] do_syscall_64+0x3f/0x90 [ 32.594287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.594623] RIP: 0033:0x7faa3db38d82 [ 32.594859] 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 [ 32.595928] RSP: 002b:00007ffcd01038e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.596380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa3db38d82 [ 32.596814] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa3cf72000 [ 32.597237] RBP: 00007faa3cf72000 R08: 0000000000000009 R09: 0000000000001000 [ 32.597675] R10: 0000000000000812 R11: 0000000000000206 R12: 000055beb9491ec0 [ 32.598099] R13: 00007ffcd0103900 R14: 00007ffcd0103930 R15: 00007ffcd0103c90 [ 32.598544] [ 32.598701] [ 32.598811] Allocated by task 218: [ 32.599030] kasan_save_stack+0x22/0x50 [ 32.599288] kasan_set_track+0x25/0x30 [ 32.599542] __kasan_slab_alloc+0x59/0x70 [ 32.599821] kmem_cache_alloc+0x16b/0x370 [ 32.600086] vm_area_dup+0x20/0x160 [ 32.600320] __split_vma+0x170/0x950 [ 32.600565] split_vma+0xc6/0x110 [ 32.600791] mprotect_fixup+0x8d2/0xb30 [ 32.601051] do_mprotect_pkey+0x87e/0xd40 [ 32.601318] __x64_sys_mprotect+0x78/0xc0 [ 32.601599] do_syscall_64+0x3f/0x90 [ 32.601846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.602182] [ 32.602293] Freed by task 19: [ 32.602492] kasan_save_stack+0x22/0x50 [ 32.602757] kasan_set_track+0x25/0x30 [ 32.603009] kasan_save_free_info+0x2b/0x50 [ 32.603281] __kasan_slab_free+0x10a/0x190 [ 32.603556] kmem_cache_free+0x10d/0x4d0 [ 32.603822] rcu_core+0x8c8/0x2860 [ 32.604050] __do_softirq+0x1b7/0x7d4 [ 32.604293] [ 32.604406] Last potentially related work creation: [ 32.604712] kasan_save_stack+0x22/0x50 [ 32.604970] __kasan_record_aux_stack+0x8e/0xa0 [ 32.605261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.605605] remove_vma+0x139/0x170 [ 32.605836] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.606122] do_vmi_munmap+0x1f1/0x2b0 [ 32.606378] __vm_munmap+0x138/0x3a0 [ 32.606622] __x64_sys_munmap+0x59/0x80 [ 32.606876] do_syscall_64+0x3f/0x90 [ 32.607119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.607449] [ 32.607564] Second to last potentially related work creation: [ 32.607918] kasan_save_stack+0x22/0x50 [ 32.608176] __kasan_record_aux_stack+0x8e/0xa0 [ 32.608468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.608805] remove_vma+0x139/0x170 [ 32.609038] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.609328] do_vmi_munmap+0x1f1/0x2b0 [ 32.609589] __vm_munmap+0x138/0x3a0 [ 32.609836] elf_map+0x26f/0x310 [ 32.610065] load_elf_binary+0x3417/0x5030 [ 32.610354] bprm_execve+0x803/0x1940 [ 32.610602] do_execveat_common+0x734/0x8e0 [ 32.610883] __x64_sys_execve+0x93/0xc0 [ 32.611155] do_syscall_64+0x3f/0x90 [ 32.611397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.611736] [ 32.611847] The buggy address belongs to the object at ffff88800e493bc8 [ 32.611847] which belongs to the cache vm_area_struct of size 168 [ 32.612606] The buggy address is located 88 bytes inside of [ 32.612606] freed 168-byte region [ffff88800e493bc8, ffff88800e493c70) [ 32.613324] [ 32.613434] The buggy address belongs to the physical page: [ 32.613784] page:00000000b1536eac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe493 [ 32.614344] memcg:ffff88800e649c01 [ 32.614571] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.614935] page_type: 0xffffffff() [ 32.615167] raw: 0100000000000200 ffff8880087a0c80 ffffea00002669c0 dead000000000005 [ 32.615650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e649c01 [ 32.616109] page dumped because: kasan: bad access detected [ 32.616445] [ 32.616563] Memory state around the buggy address: [ 32.616862] ffff88800e493b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.617293] ffff88800e493b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.617741] >ffff88800e493c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.618192] ^ [ 32.618463] ffff88800e493c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.618950] ffff88800e493d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.619390] ================================================================== [ 32.619874] Disabling lock debugging due to kernel taint [ 33.904084] BUG: Bad rss-counter state mm:0000000025721a64 type:MM_FILEPAGES val:33 [ 33.905111] BUG: Bad rss-counter state mm:0000000025721a64 type:MM_ANONPAGES val:22 [ 34.269578] BUG: Bad rss-counter state mm:00000000a32fd8d6 type:MM_FILEPAGES val:33 [ 34.270605] BUG: Bad rss-counter state mm:00000000a32fd8d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34103' (ECDSA) to the list of known hosts. 2023/06/20 17:56:00 fuzzer started 2023/06/20 17:56:00 dialing manager at localhost:36067 2023/06/20 17:56:00 checking machine... 2023/06/20 17:56:00 checking revisions... [ 35.019995] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:56:00 testing simple program... [ 35.066398] cgroup: Unknown subsys name 'net' [ 35.122713] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:55:59 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888016096600 RCX=0000000000000000 RDX=ffff8880146b1b40 RSI=ffffffff844b7b09 RDI=ffff888016096600 RBP=dffffc0000000000 RSP=ffff888015c57d68 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000100 R11=0000000000000000 R12=0000000000000100 R13=ffff888015c57e70 R14=ffffffffffffffff R15=1ffff11002b8afaf RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff837b5a900 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=00007ff836f759a0 CR3=000000000d97a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5675968ae764462500000000000ae988 XMM05=de183bf2509e35270000000000133ac8 XMM06=ae9b264101391a5b00000000001327f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002ba6fa6 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015e49b40 RSI=ffffffff817170b1 RDI=ffffffff8560b640 RBP=1ffff11002ba6fa6 RSP=ffff888015d37d20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff8560b640 R13=ffffffff817170b1 R14=0000000000000001 R15=ffff8880097592e8 RIP=ffffffff812d86a9 RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f63f7ab8900 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=00007ffca3e5ba1c CR3=000000000ca88000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=ab84114ab36aae49d6e38859c0a40ace XMM05=00000000000000000000000000000000 XMM06=7373114a636a733d7365722068730a3d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000