syzkaller login: [ 50.380130] BUG: Bad rss-counter state mm:0000000037d74268 type:MM_FILEPAGES val:33 [ 50.381377] BUG: Bad rss-counter state mm:0000000037d74268 type:MM_ANONPAGES val:22 [ 50.416932] ================================================================== [ 50.418143] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.419258] Read of size 8 at addr ffff88800e06ddf0 by task sshd/219 [ 50.420244] [ 50.420486] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.421512] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.422768] Call Trace: [ 50.423126] [ 50.423434] dump_stack_lvl+0x91/0xf0 [ 50.424005] print_report+0xcc/0x620 [ 50.424660] ? __virt_addr_valid+0x102/0x340 [ 50.425262] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.425943] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.426635] kasan_report+0xbe/0xf0 [ 50.427155] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.427833] vma_interval_tree_remove+0xc75/0xec0 [ 50.428494] vma_prepare+0xc54/0x11a0 [ 50.429017] __split_vma+0x5af/0x950 [ 50.429533] ? __pfx___split_vma+0x10/0x10 [ 50.430122] ? find_held_lock+0x2c/0x110 [ 50.430692] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.431304] ? lock_is_held_type+0x9f/0x120 [ 50.431890] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.432545] ? mtree_range_walk+0x632/0x900 [ 50.433142] ? mas_walk+0x5c7/0x7c0 [ 50.433653] do_vmi_munmap+0x1f1/0x2b0 [ 50.434213] mmap_region+0x1f9/0x2660 [ 50.434742] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.435298] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.436084] ? __pfx_lock_acquire+0x10/0x10 [ 50.436671] ? __pfx_mmap_region+0x10/0x10 [ 50.437255] ? security_mmap_addr+0x7d/0xa0 [ 50.437831] ? get_unmapped_area+0x1f5/0x3f0 [ 50.438440] do_mmap+0x854/0xf00 [ 50.438911] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.439453] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.440059] ksys_mmap_pgoff+0x3af/0x500 [ 50.440612] do_syscall_64+0x3f/0x90 [ 50.441134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.441829] RIP: 0033:0x7ff9800aad82 [ 50.442326] 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 [ 50.444663] RSP: 002b:00007ffe4e4429f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.445904] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9800aad82 [ 50.446837] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff97f4e4000 [ 50.447768] RBP: 00007ff97f4e4000 R08: 0000000000000009 R09: 0000000000001000 [ 50.448694] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574b3459ec0 [ 50.449600] R13: 00007ffe4e442a10 R14: 00007ffe4e442a40 R15: 00007ffe4e442da0 [ 50.450540] [ 50.450851] [ 50.451081] Allocated by task 212: [ 50.451540] kasan_save_stack+0x22/0x50 [ 50.452078] kasan_set_track+0x25/0x30 [ 50.452601] __kasan_slab_alloc+0x59/0x70 [ 50.453169] kmem_cache_alloc+0x16b/0x370 [ 50.453722] vm_area_dup+0x20/0x160 [ 50.454224] __split_vma+0x170/0x950 [ 50.454727] split_vma+0xc6/0x110 [ 50.455188] mprotect_fixup+0x8d2/0xb30 [ 50.455723] do_mprotect_pkey+0x87e/0xd40 [ 50.456271] __x64_sys_mprotect+0x78/0xc0 [ 50.456828] do_syscall_64+0x3f/0x90 [ 50.457337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.458028] [ 50.458270] Freed by task 212: [ 50.458691] kasan_save_stack+0x22/0x50 [ 50.459221] kasan_set_track+0x25/0x30 [ 50.459752] kasan_save_free_info+0x2b/0x50 [ 50.460324] __kasan_slab_free+0x10a/0x190 [ 50.460896] kmem_cache_free+0x10d/0x4d0 [ 50.461436] rcu_core+0x8c8/0x2860 [ 50.461910] __do_softirq+0x1b7/0x7d4 [ 50.462423] [ 50.462650] Last potentially related work creation: [ 50.463284] kasan_save_stack+0x22/0x50 [ 50.463815] __kasan_record_aux_stack+0x8e/0xa0 [ 50.464420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.465115] remove_vma+0x139/0x170 [ 50.465594] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.466203] do_vmi_munmap+0x1f1/0x2b0 [ 50.466721] __vm_munmap+0x138/0x3a0 [ 50.467220] __x64_sys_munmap+0x59/0x80 [ 50.467751] do_syscall_64+0x3f/0x90 [ 50.468262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.468951] [ 50.469184] Second to last potentially related work creation: [ 50.469907] kasan_save_stack+0x22/0x50 [ 50.470441] __kasan_record_aux_stack+0x8e/0xa0 [ 50.471048] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.471717] remove_vma+0x139/0x170 [ 50.472184] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.472790] do_vmi_munmap+0x1f1/0x2b0 [ 50.473293] mmap_region+0x1f9/0x2660 [ 50.473769] do_mmap+0x854/0xf00 [ 50.474222] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.474738] ksys_mmap_pgoff+0x3af/0x500 [ 50.475238] do_syscall_64+0x3f/0x90 [ 50.475743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.476400] [ 50.476629] The buggy address belongs to the object at ffff88800e06dd98 [ 50.476629] which belongs to the cache vm_area_struct of size 168 [ 50.478160] The buggy address is located 88 bytes inside of [ 50.478160] freed 168-byte region [ffff88800e06dd98, ffff88800e06de40) [ 50.479617] [ 50.479839] The buggy address belongs to the physical page: [ 50.480523] page:00000000a2f61f94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe06d [ 50.481634] memcg:ffff88800e35df01 [ 50.482074] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 50.482811] page_type: 0xffffffff() [ 50.483278] raw: 0100000000000200 ffff88800879fc80 ffffea0000397f00 dead000000000007 [ 50.484219] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e35df01 [ 50.485148] page dumped because: kasan: bad access detected [ 50.485820] [ 50.486042] Memory state around the buggy address: [ 50.486721] ffff88800e06dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 50.487590] ffff88800e06dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 50.488459] >ffff88800e06dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 50.489330] ^ [ 50.490169] ffff88800e06de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.491039] ffff88800e06de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.491908] ================================================================== [ 50.492883] Disabling lock debugging due to kernel taint [ 53.010541] BUG: Bad rss-counter state mm:00000000d3d79dac type:MM_FILEPAGES val:33 [ 53.011784] BUG: Bad rss-counter state mm:00000000d3d79dac type:MM_ANONPAGES val:22 [ 53.521227] BUG: Bad rss-counter state mm:00000000a8757c3c type:MM_FILEPAGES val:33 [ 53.522285] BUG: Bad rss-counter state mm:00000000a8757c3c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19821' (ECDSA) to the list of known hosts. 2023/06/20 08:25:31 fuzzer started 2023/06/20 08:25:31 dialing manager at localhost:44161 2023/06/20 08:25:31 checking machine... 2023/06/20 08:25:31 checking revisions... [ 54.162097] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:25:31 testing simple program... [ 54.211822] cgroup: Unknown subsys name 'net' [ 54.250059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:25:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff864bd301 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =ffffffff864bd3c6 R9 =ffff88806ce09ad8 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800cbacec0 RIP=ffffffff8113038e 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 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=00007f96aa7e2030 CR3=0000000019c66000 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=2031333a35323a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a35323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffe5ac625 RBX=ffffffff86053a30 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a30 RSP=ffff888015cb72f0 R8 =ffffffff864b9d50 R9 =ffff888015cb73e8 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f64132a8900 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=00007f6413257008 CR3=000000000d96a000 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