syzkaller login: [ 30.557593] BUG: Bad rss-counter state mm:00000000dff47f4e type:MM_FILEPAGES val:33 [ 30.558956] BUG: Bad rss-counter state mm:00000000dff47f4e type:MM_ANONPAGES val:22 [ 30.740310] ================================================================== [ 30.741215] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.742148] Read of size 8 at addr ffff88800fdc8df0 by task sshd/220 [ 30.742911] [ 30.743127] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.744073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.745054] Call Trace: [ 30.745367] [ 30.745666] dump_stack_lvl+0x91/0xf0 [ 30.746154] print_report+0xcc/0x620 [ 30.746635] ? __virt_addr_valid+0x102/0x340 [ 30.747174] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747782] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748407] kasan_report+0xbe/0xf0 [ 30.748874] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.749488] vma_interval_tree_remove+0xc75/0xec0 [ 30.750095] vma_prepare+0xc54/0x11a0 [ 30.750571] __split_vma+0x5af/0x950 [ 30.751033] ? __pfx___split_vma+0x10/0x10 [ 30.751557] ? find_held_lock+0x2c/0x110 [ 30.752075] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.752649] ? lock_is_held_type+0x9f/0x120 [ 30.753184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.753785] ? mtree_range_walk+0x632/0x900 [ 30.754329] ? mas_walk+0x5c7/0x7c0 [ 30.754796] do_vmi_munmap+0x1f1/0x2b0 [ 30.755285] mmap_region+0x1f9/0x2660 [ 30.755769] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.756296] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.756998] ? __pfx_lock_acquire+0x10/0x10 [ 30.757533] ? __pfx_mmap_region+0x10/0x10 [ 30.758064] ? security_mmap_addr+0x7d/0xa0 [ 30.758591] ? get_unmapped_area+0x1f5/0x3f0 [ 30.759144] do_mmap+0x854/0xf00 [ 30.759574] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.760071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.760639] ksys_mmap_pgoff+0x3af/0x500 [ 30.761150] do_syscall_64+0x3f/0x90 [ 30.761627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762264] RIP: 0033:0x7fab56e92d82 [ 30.762712] 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 [ 30.764829] RSP: 002b:00007fff59776b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.765719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab56e92d82 [ 30.766550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab562cc000 [ 30.767393] RBP: 00007fab562cc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.768248] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c077f8d90 [ 30.769127] R13: 00007fff59776b20 R14: 00007fff59776b50 R15: 00007fff59776eb0 [ 30.769977] [ 30.770266] [ 30.770480] Allocated by task 213: [ 30.770902] kasan_save_stack+0x22/0x50 [ 30.771404] kasan_set_track+0x25/0x30 [ 30.771907] __kasan_slab_alloc+0x59/0x70 [ 30.772452] kmem_cache_alloc+0x16b/0x370 [ 30.772974] vm_area_dup+0x20/0x160 [ 30.773420] __split_vma+0x170/0x950 [ 30.773880] split_vma+0xc6/0x110 [ 30.774314] mprotect_fixup+0x8d2/0xb30 [ 30.774811] do_mprotect_pkey+0x87e/0xd40 [ 30.775333] __x64_sys_mprotect+0x78/0xc0 [ 30.775859] do_syscall_64+0x3f/0x90 [ 30.776339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776977] [ 30.777192] Freed by task 213: [ 30.777590] kasan_save_stack+0x22/0x50 [ 30.778091] kasan_set_track+0x25/0x30 [ 30.778577] kasan_save_free_info+0x2b/0x50 [ 30.779106] __kasan_slab_free+0x10a/0x190 [ 30.779632] kmem_cache_free+0x10d/0x4d0 [ 30.780137] rcu_core+0x8c8/0x2860 [ 30.780588] __do_softirq+0x1b7/0x7d4 [ 30.781071] [ 30.781283] Last potentially related work creation: [ 30.781866] kasan_save_stack+0x22/0x50 [ 30.782364] __kasan_record_aux_stack+0x8e/0xa0 [ 30.782927] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.783570] remove_vma+0x139/0x170 [ 30.784019] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.784592] do_vmi_munmap+0x1f1/0x2b0 [ 30.785074] __vm_munmap+0x138/0x3a0 [ 30.785537] __x64_sys_munmap+0x59/0x80 [ 30.786030] do_syscall_64+0x3f/0x90 [ 30.786511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787150] [ 30.787363] Second to last potentially related work creation: [ 30.788037] kasan_save_stack+0x22/0x50 [ 30.788550] __kasan_record_aux_stack+0x8e/0xa0 [ 30.789117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.789755] remove_vma+0x139/0x170 [ 30.790201] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.790750] do_vmi_munmap+0x1f1/0x2b0 [ 30.791230] __vm_munmap+0x138/0x3a0 [ 30.791698] elf_map+0x26f/0x310 [ 30.792153] load_elf_binary+0x3417/0x5030 [ 30.792700] bprm_execve+0x803/0x1940 [ 30.793166] do_execveat_common+0x734/0x8e0 [ 30.793684] __x64_sys_execve+0x93/0xc0 [ 30.794171] do_syscall_64+0x3f/0x90 [ 30.794650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795289] [ 30.795505] The buggy address belongs to the object at ffff88800fdc8d98 [ 30.795505] which belongs to the cache vm_area_struct of size 168 [ 30.796993] The buggy address is located 88 bytes inside of [ 30.796993] freed 168-byte region [ffff88800fdc8d98, ffff88800fdc8e40) [ 30.798380] [ 30.798594] The buggy address belongs to the physical page: [ 30.799253] page:000000001625d034 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdc8 [ 30.800334] memcg:ffff88800f0b9801 [ 30.800757] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.801402] page_type: 0xffffffff() [ 30.801848] raw: 0100000000000200 ffff8880087a0c80 ffffea0000370540 dead000000000008 [ 30.802760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0b9801 [ 30.803704] page dumped because: kasan: bad access detected [ 30.804400] [ 30.804625] Memory state around the buggy address: [ 30.805225] ffff88800fdc8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.806115] ffff88800fdc8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.806991] >ffff88800fdc8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.807869] ^ [ 30.808727] ffff88800fdc8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.809615] ffff88800fdc8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.810489] ================================================================== [ 30.811586] Disabling lock debugging due to kernel taint [ 33.209991] BUG: Bad rss-counter state mm:0000000075ae6700 type:MM_FILEPAGES val:33 [ 33.211344] BUG: Bad rss-counter state mm:0000000075ae6700 type:MM_ANONPAGES val:22 [ 33.611709] BUG: Bad rss-counter state mm:000000007cb6c725 type:MM_FILEPAGES val:33 [ 33.612719] BUG: Bad rss-counter state mm:000000007cb6c725 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43546' (ECDSA) to the list of known hosts. 2023/06/20 23:28:53 fuzzer started 2023/06/20 23:28:53 dialing manager at localhost:36067 2023/06/20 23:28:53 checking machine... 2023/06/20 23:28:53 checking revisions... [ 34.353318] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:28:53 testing simple program... [ 34.409888] cgroup: Unknown subsys name 'net' [ 34.453856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:53 Registers: info registers vcpu 0 RAX=00007f8969da3920 RBX=00007ffeb9666940 RCX=000000000000acf8 RDX=0000000000000000 RSI=00007ffeb9666940 RDI=00007f8969e936b0 RBP=00005625cf5dd2d0 RSP=fffffe0000002fd0 R8 =0000000000134670 R9 =0000000000134670 R10=0000000000000002 R11=000000000000e782 R12=000000000000002b R13=0000000000043330 R14=0000000000000000 R15=00007ffeb9666420 RIP=ffffffff84601264 RFL=00000046 [---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 00007f896a974900 00000000 00000000 GS =0000 0000000000000000 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=00007f8969da3920 CR3=000000000f740000 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=6c0ab1617a31c9bd00000000000ae988 XMM05=4846bc882f50dec600000000001342f0 XMM06=19e9129bd510f2350000000000133188 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002c74e13 RSI=ffff8880163a7a80 RDI=ffff8880163a70a0 RBP=ffff8880163a7e70 RSP=ffff8880163a6fe0 R8 =0000000000000001 R9 =ffff8880163a7090 R10=0000000000038001 R11=00000000000b3f57 R12=ffff8880163a70b0 R13=ffff8880163a7098 R14=ffff8880163a7a80 R15=ffff8880163a7050 RIP=ffffffff81131c60 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 00007f0045a00900 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=00007f00459df020 CR3=000000000ec90000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000