syzkaller login: [ 32.622494] BUG: Bad rss-counter state mm:00000000c6233a23 type:MM_FILEPAGES val:33 [ 32.624964] BUG: Bad rss-counter state mm:00000000c6233a23 type:MM_ANONPAGES val:22 [ 32.790202] ================================================================== [ 32.791128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.792072] Read of size 8 at addr ffff888019924d08 by task sshd/221 [ 32.792944] [ 32.793159] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.794105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.795261] Call Trace: [ 32.795700] [ 32.796083] dump_stack_lvl+0x91/0xf0 [ 32.796755] print_report+0xcc/0x620 [ 32.797414] ? __virt_addr_valid+0x102/0x340 [ 32.798122] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.798775] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.799389] kasan_report+0xbe/0xf0 [ 32.799944] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.800588] vma_interval_tree_remove+0xc75/0xec0 [ 32.801196] vma_prepare+0xc54/0x11a0 [ 32.801707] __split_vma+0x5af/0x950 [ 32.802195] ? __pfx___split_vma+0x10/0x10 [ 32.802757] ? find_held_lock+0x2c/0x110 [ 32.803281] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.803903] ? lock_is_held_type+0x9f/0x120 [ 32.804436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.805072] ? mtree_range_walk+0x632/0x900 [ 32.805626] ? mas_walk+0x5c7/0x7c0 [ 32.806090] do_vmi_munmap+0x1f1/0x2b0 [ 32.806575] mmap_region+0x1f9/0x2660 [ 32.807055] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.807558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.808262] ? __pfx_lock_acquire+0x10/0x10 [ 32.808816] ? __pfx_mmap_region+0x10/0x10 [ 32.809345] ? security_mmap_addr+0x7d/0xa0 [ 32.809874] ? get_unmapped_area+0x1f5/0x3f0 [ 32.810430] do_mmap+0x854/0xf00 [ 32.810867] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.811350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.811912] ksys_mmap_pgoff+0x3af/0x500 [ 32.812413] do_syscall_64+0x3f/0x90 [ 32.812914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.813554] RIP: 0033:0x7f3e1f7e9d82 [ 32.814014] 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 [ 32.816194] RSP: 002b:00007ffc16287338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.817127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e1f7e9d82 [ 32.817981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e1ec23000 [ 32.818866] RBP: 00007f3e1ec23000 R08: 0000000000000009 R09: 0000000000001000 [ 32.819741] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff19888f70 [ 32.820715] R13: 00007ffc16287350 R14: 00007ffc16287380 R15: 00007ffc162876e0 [ 32.821567] [ 32.821884] [ 32.822105] Allocated by task 214: [ 32.822546] kasan_save_stack+0x22/0x50 [ 32.823063] kasan_set_track+0x25/0x30 [ 32.823555] __kasan_slab_alloc+0x59/0x70 [ 32.824107] kmem_cache_alloc+0x16b/0x370 [ 32.824665] vm_area_dup+0x20/0x160 [ 32.825123] __split_vma+0x170/0x950 [ 32.825601] split_vma+0xc6/0x110 [ 32.826046] mprotect_fixup+0x8d2/0xb30 [ 32.826552] do_mprotect_pkey+0x87e/0xd40 [ 32.827081] __x64_sys_mprotect+0x78/0xc0 [ 32.827597] do_syscall_64+0x3f/0x90 [ 32.828078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.828769] [ 32.828979] Freed by task 214: [ 32.829367] kasan_save_stack+0x22/0x50 [ 32.829904] kasan_set_track+0x25/0x30 [ 32.830407] kasan_save_free_info+0x2b/0x50 [ 32.830949] __kasan_slab_free+0x10a/0x190 [ 32.831488] kmem_cache_free+0x10d/0x4d0 [ 32.832011] rcu_core+0x8c8/0x2860 [ 32.832453] __do_softirq+0x1b7/0x7d4 [ 32.832955] [ 32.833176] Last potentially related work creation: [ 32.833803] kasan_save_stack+0x22/0x50 [ 32.834312] __kasan_record_aux_stack+0x8e/0xa0 [ 32.834912] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.835550] remove_vma+0x139/0x170 [ 32.836022] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.836588] do_vmi_munmap+0x1f1/0x2b0 [ 32.837078] __vm_munmap+0x138/0x3a0 [ 32.837544] __x64_sys_munmap+0x59/0x80 [ 32.838075] do_syscall_64+0x3f/0x90 [ 32.838546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.839208] [ 32.839429] The buggy address belongs to the object at ffff888019924cb0 [ 32.839429] which belongs to the cache vm_area_struct of size 168 [ 32.840925] The buggy address is located 88 bytes inside of [ 32.840925] freed 168-byte region [ffff888019924cb0, ffff888019924d58) [ 32.842344] [ 32.842558] The buggy address belongs to the physical page: [ 32.843245] page:000000004e8ab3d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19924 [ 32.844372] memcg:ffff8880197b1a01 [ 32.844838] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.845481] page_type: 0xffffffff() [ 32.845938] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.846888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197b1a01 [ 32.847811] page dumped because: kasan: bad access detected [ 32.848475] [ 32.848724] Memory state around the buggy address: [ 32.849314] ffff888019924c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.850178] ffff888019924c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.851050] >ffff888019924d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.851932] ^ [ 32.852366] ffff888019924d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.853251] ffff888019924e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.854121] ================================================================== [ 32.855104] Disabling lock debugging due to kernel taint [ 35.445860] BUG: Bad rss-counter state mm:0000000071f6ec42 type:MM_FILEPAGES val:33 [ 35.447280] BUG: Bad rss-counter state mm:0000000071f6ec42 type:MM_ANONPAGES val:22 [ 35.837994] BUG: Bad rss-counter state mm:00000000eccfe920 type:MM_FILEPAGES val:33 [ 35.839061] BUG: Bad rss-counter state mm:00000000eccfe920 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40521' (ECDSA) to the list of known hosts. 2023/06/20 07:35:03 fuzzer started 2023/06/20 07:35:03 dialing manager at localhost:44161 2023/06/20 07:35:03 checking machine... 2023/06/20 07:35:03 checking revisions... [ 36.602654] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:35:03 testing simple program... [ 36.655238] cgroup: Unknown subsys name 'net' [ 36.701437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:35:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110028cf2bc RSI=0000000000000001 RDI=ffff8880146795e0 RBP=ffff88800de8b680 RSP=ffff888019507670 R8 =ffff8880146795e4 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888014678000 R13=0000000000000000 R14=ffff8880146795c0 R15=ffff8880146795e6 RIP=ffffffff8107f380 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f00dd95c900 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=00007f00dcd5f7c0 CR3=000000000fe50000 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=3380f9da8ae716b73645a371b85b9e18 XMM02=ec2efd57dc4c00df000000000011cde8 XMM03=28632d9c4f2c3614000000000011ceb8 XMM04=543bcbcc2610edc200000000000ae988 XMM05=e4cb8bb95a7664b60000000000133dd8 XMM06=c7ec1f809befb2fb0000000000132c40 XMM07=e042d86d42eb936e0000000000124578 XMM08=28632d9c4f2c3614000000000011ceb8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff83c632d1 RDX=ffff8880094b9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880145176a0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000fa R11=00000a3400000a34 R12=0000000000000000 R13=00000000000000fa R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c07eb RFL=00000287 [--S--PC] 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 00007ff1074b9900 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=00007ffe149ed000 CR3=0000000019812000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000