syzkaller login: [ 30.589362] BUG: Bad rss-counter state mm:00000000601cbd01 type:MM_FILEPAGES val:33 [ 30.591361] BUG: Bad rss-counter state mm:00000000601cbd01 type:MM_ANONPAGES val:22 [ 30.775833] ================================================================== [ 30.776964] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.778200] Read of size 8 at addr ffff88800f09d880 by task sshd/221 [ 30.778964] [ 30.779180] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.780060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.781042] Call Trace: [ 30.781362] [ 30.781643] dump_stack_lvl+0x91/0xf0 [ 30.782128] print_report+0xcc/0x620 [ 30.782617] ? __virt_addr_valid+0x102/0x340 [ 30.783168] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783823] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784443] kasan_report+0xbe/0xf0 [ 30.784915] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.785537] vma_interval_tree_remove+0xc75/0xec0 [ 30.786129] vma_prepare+0xc54/0x11a0 [ 30.786607] __split_vma+0x5af/0x950 [ 30.787072] ? __pfx___split_vma+0x10/0x10 [ 30.787597] ? find_held_lock+0x2c/0x110 [ 30.788147] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.788712] ? lock_is_held_type+0x9f/0x120 [ 30.789245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.789847] ? mtree_range_walk+0x632/0x900 [ 30.790402] ? mas_walk+0x5c7/0x7c0 [ 30.790872] do_vmi_munmap+0x1f1/0x2b0 [ 30.791362] mmap_region+0x1f9/0x2660 [ 30.791876] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.792385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.793096] ? __pfx_lock_acquire+0x10/0x10 [ 30.793629] ? __pfx_mmap_region+0x10/0x10 [ 30.794158] ? security_mmap_addr+0x7d/0xa0 [ 30.794681] ? get_unmapped_area+0x1f5/0x3f0 [ 30.795226] do_mmap+0x854/0xf00 [ 30.795691] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.796184] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.796741] ksys_mmap_pgoff+0x3af/0x500 [ 30.797240] do_syscall_64+0x3f/0x90 [ 30.797712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798355] RIP: 0033:0x7f96ec59cd82 [ 30.798810] 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 [ 30.800926] RSP: 002b:00007ffc5a01c368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.801836] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96ec59cd82 [ 30.802685] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96eb9d6000 [ 30.803523] RBP: 00007f96eb9d6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.804407] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e45c83d90 [ 30.805260] R13: 00007ffc5a01c380 R14: 00007ffc5a01c3b0 R15: 00007ffc5a01c710 [ 30.806113] [ 30.806413] [ 30.806623] Allocated by task 214: [ 30.807051] kasan_save_stack+0x22/0x50 [ 30.807551] kasan_set_track+0x25/0x30 [ 30.808083] __kasan_slab_alloc+0x59/0x70 [ 30.808604] kmem_cache_alloc+0x16b/0x370 [ 30.809116] vm_area_dup+0x20/0x160 [ 30.809564] __split_vma+0x170/0x950 [ 30.810031] split_vma+0xc6/0x110 [ 30.810467] mprotect_fixup+0x8d2/0xb30 [ 30.810973] do_mprotect_pkey+0x87e/0xd40 [ 30.811485] __x64_sys_mprotect+0x78/0xc0 [ 30.812038] do_syscall_64+0x3f/0x90 [ 30.812516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813159] [ 30.813377] Freed by task 214: [ 30.813768] kasan_save_stack+0x22/0x50 [ 30.814262] kasan_set_track+0x25/0x30 [ 30.814747] kasan_save_free_info+0x2b/0x50 [ 30.815275] __kasan_slab_free+0x10a/0x190 [ 30.815855] kmem_cache_free+0x10d/0x4d0 [ 30.816358] rcu_core+0x8c8/0x2860 [ 30.816797] __do_softirq+0x1b7/0x7d4 [ 30.817272] [ 30.817485] Last potentially related work creation: [ 30.818065] kasan_save_stack+0x22/0x50 [ 30.818572] __kasan_record_aux_stack+0x8e/0xa0 [ 30.819276] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.819951] remove_vma+0x139/0x170 [ 30.820399] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.820950] do_vmi_munmap+0x1f1/0x2b0 [ 30.821432] __vm_munmap+0x138/0x3a0 [ 30.821895] __x64_sys_munmap+0x59/0x80 [ 30.822387] do_syscall_64+0x3f/0x90 [ 30.822865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823506] [ 30.823753] The buggy address belongs to the object at ffff88800f09d828 [ 30.823753] which belongs to the cache vm_area_struct of size 168 [ 30.825220] The buggy address is located 88 bytes inside of [ 30.825220] freed 168-byte region [ffff88800f09d828, ffff88800f09d8d0) [ 30.826621] [ 30.826835] The buggy address belongs to the physical page: [ 30.827608] page:000000008172b4e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf09d [ 30.828689] memcg:ffff88800cbc5701 [ 30.829099] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.829724] page_type: 0xffffffff() [ 30.830161] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.831052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbc5701 [ 30.831958] page dumped because: kasan: bad access detected [ 30.832594] [ 30.832803] Memory state around the buggy address: [ 30.833369] ffff88800f09d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.834191] ffff88800f09d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.835017] >ffff88800f09d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.835866] ^ [ 30.836263] ffff88800f09d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.837093] ffff88800f09d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.837914] ================================================================== [ 30.838856] Disabling lock debugging due to kernel taint [ 33.470308] BUG: Bad rss-counter state mm:00000000672fb214 type:MM_FILEPAGES val:33 [ 33.471480] BUG: Bad rss-counter state mm:00000000672fb214 type:MM_ANONPAGES val:22 [ 33.991870] BUG: Bad rss-counter state mm:00000000428255d6 type:MM_FILEPAGES val:33 [ 33.993413] BUG: Bad rss-counter state mm:00000000428255d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50563' (ECDSA) to the list of known hosts. 2023/06/21 10:28:27 fuzzer started 2023/06/21 10:28:27 dialing manager at localhost:36067 2023/06/21 10:28:27 checking machine... 2023/06/21 10:28:27 checking revisions... [ 34.633636] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:28:27 testing simple program... [ 34.676505] cgroup: Unknown subsys name 'net' [ 34.723515] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:28:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000288 RCX=ffff888016dad1c0 RDX=00000000ffffffff RSI=0000000000000dc0 RDI=ffff88801a01a000 RBP=0000000000000001 RSP=ffff8880168f7b38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=ffff88801a01a000 R14=0000000000000040 R15=ffff88801a01a000 RIP=ffffffff81835486 RFL=00000257 [---ZAPC] 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 00007f5fee715900 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=00007ffd80e2c000 CR3=000000000c994000 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=00007f3e00ff0a50 CR3=000000000dd36000 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=2037323a38323a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a38323a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000