syzkaller login: [ 30.601438] BUG: Bad rss-counter state mm:000000006b97fdba type:MM_FILEPAGES val:33 [ 30.602904] BUG: Bad rss-counter state mm:000000006b97fdba type:MM_ANONPAGES val:22 [ 30.736097] ================================================================== [ 30.736962] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.737854] Read of size 8 at addr ffff8880182b8310 by task sshd/219 [ 30.738574] [ 30.738783] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.739717] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.740630] Call Trace: [ 30.740938] [ 30.741207] dump_stack_lvl+0x91/0xf0 [ 30.741681] print_report+0xcc/0x620 [ 30.742156] ? __virt_addr_valid+0x102/0x340 [ 30.742675] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743253] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.743836] kasan_report+0xbe/0xf0 [ 30.744285] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.744872] vma_interval_tree_remove+0xc75/0xec0 [ 30.745436] vma_prepare+0xc54/0x11a0 [ 30.745907] __split_vma+0x5af/0x950 [ 30.746375] ? __pfx___split_vma+0x10/0x10 [ 30.746888] ? find_held_lock+0x2c/0x110 [ 30.747408] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.747967] ? lock_is_held_type+0x9f/0x120 [ 30.748507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.749103] ? mtree_range_walk+0x632/0x900 [ 30.749644] ? mas_walk+0x5c7/0x7c0 [ 30.750127] do_vmi_munmap+0x1f1/0x2b0 [ 30.750612] mmap_region+0x1f9/0x2660 [ 30.751089] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.751583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.752294] ? __pfx_lock_acquire+0x10/0x10 [ 30.752810] ? __pfx_mmap_region+0x10/0x10 [ 30.753331] ? security_mmap_addr+0x7d/0xa0 [ 30.753886] ? get_unmapped_area+0x1f5/0x3f0 [ 30.754448] do_mmap+0x854/0xf00 [ 30.754881] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.755376] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.755933] ksys_mmap_pgoff+0x3af/0x500 [ 30.756446] do_syscall_64+0x3f/0x90 [ 30.756924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757562] RIP: 0033:0x7f0418909d82 [ 30.758024] 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 [ 30.760098] RSP: 002b:00007ffc8e62e198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.760988] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0418909d82 [ 30.761847] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0417d43000 [ 30.762758] RBP: 00007f0417d43000 R08: 0000000000000009 R09: 0000000000001000 [ 30.763670] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5da885980 [ 30.764643] R13: 00007ffc8e62e1b0 R14: 00007ffc8e62e1e0 R15: 00007ffc8e62e540 [ 30.765491] [ 30.765818] [ 30.766038] Allocated by task 212: [ 30.766480] kasan_save_stack+0x22/0x50 [ 30.766988] kasan_set_track+0x25/0x30 [ 30.767484] __kasan_slab_alloc+0x59/0x70 [ 30.768017] kmem_cache_alloc+0x16b/0x370 [ 30.768544] vm_area_dup+0x20/0x160 [ 30.769011] __split_vma+0x170/0x950 [ 30.769491] split_vma+0xc6/0x110 [ 30.769946] mprotect_fixup+0x8d2/0xb30 [ 30.770451] do_mprotect_pkey+0x87e/0xd40 [ 30.770982] __x64_sys_mprotect+0x78/0xc0 [ 30.771519] do_syscall_64+0x3f/0x90 [ 30.772014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772661] [ 30.772879] Freed by task 212: [ 30.773282] kasan_save_stack+0x22/0x50 [ 30.773805] kasan_set_track+0x25/0x30 [ 30.774303] kasan_save_free_info+0x2b/0x50 [ 30.774854] __kasan_slab_free+0x10a/0x190 [ 30.775397] kmem_cache_free+0x10d/0x4d0 [ 30.775911] rcu_core+0x8c8/0x2860 [ 30.776367] __do_softirq+0x1b7/0x7d4 [ 30.776846] [ 30.777060] Last potentially related work creation: [ 30.777661] kasan_save_stack+0x22/0x50 [ 30.778184] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.779393] remove_vma+0x139/0x170 [ 30.779842] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.780401] do_vmi_munmap+0x1f1/0x2b0 [ 30.780883] __vm_munmap+0x138/0x3a0 [ 30.781354] __x64_sys_munmap+0x59/0x80 [ 30.781887] do_syscall_64+0x3f/0x90 [ 30.782398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783036] [ 30.783253] The buggy address belongs to the object at ffff8880182b82b8 [ 30.783253] which belongs to the cache vm_area_struct of size 168 [ 30.784722] The buggy address is located 88 bytes inside of [ 30.784722] freed 168-byte region [ffff8880182b82b8, ffff8880182b8360) [ 30.786131] [ 30.786345] The buggy address belongs to the physical page: [ 30.787001] page:000000001c1f3f8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182b8 [ 30.788086] memcg:ffff88801690d601 [ 30.788499] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789145] page_type: 0xffffffff() [ 30.789590] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.790520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801690d601 [ 30.791413] page dumped because: kasan: bad access detected [ 30.792083] [ 30.792298] Memory state around the buggy address: [ 30.792885] ffff8880182b8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.793756] ffff8880182b8280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.794591] >ffff8880182b8300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.795444] ^ [ 30.795918] ffff8880182b8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.796783] ffff8880182b8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.797642] ================================================================== [ 30.798998] Disabling lock debugging due to kernel taint [ 32.699810] BUG: Bad rss-counter state mm:000000003055eed9 type:MM_FILEPAGES val:33 [ 32.700883] BUG: Bad rss-counter state mm:000000003055eed9 type:MM_ANONPAGES val:22 [ 33.163151] BUG: Bad rss-counter state mm:00000000d168cacf type:MM_FILEPAGES val:33 [ 33.163935] BUG: Bad rss-counter state mm:00000000d168cacf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4754' (ECDSA) to the list of known hosts. 2023/06/21 03:33:57 fuzzer started 2023/06/21 03:33:57 dialing manager at localhost:36067 2023/06/21 03:33:57 checking machine... 2023/06/21 03:33:57 checking revisions... [ 33.696189] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:33:57 testing simple program... [ 33.742342] cgroup: Unknown subsys name 'net' [ 33.787005] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:33:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ecb6130 RCX=ffff88800844f780 RDX=ffffea00003b74c0 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff88800fbef448 R8 =ffff88800edd3130 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88800fbef488 R14=ffff88800844f780 R15=ffff888009df7000 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007fb7ec7ea900 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=00007ffc62ac0000 CR3=000000000d79a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f7bf8e74000 CR3=0000000009f56000 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=2037353a33333a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a33333a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000