syzkaller login: [ 30.280417] BUG: Bad rss-counter state mm:00000000b6be7a7c type:MM_FILEPAGES val:33 [ 30.281295] BUG: Bad rss-counter state mm:00000000b6be7a7c type:MM_ANONPAGES val:22 [ 30.400546] ================================================================== [ 30.401213] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.401889] Read of size 8 at addr ffff888018324968 by task sshd/219 [ 30.402458] [ 30.402613] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.403216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.403912] Call Trace: [ 30.404142] [ 30.404344] dump_stack_lvl+0x91/0xf0 [ 30.404692] print_report+0xcc/0x620 [ 30.405145] ? __virt_addr_valid+0x102/0x340 [ 30.405560] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.406001] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.406459] kasan_report+0xbe/0xf0 [ 30.406802] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.407269] vma_interval_tree_remove+0xc75/0xec0 [ 30.407736] vma_prepare+0xc54/0x11a0 [ 30.408094] __split_vma+0x5af/0x950 [ 30.408436] ? __pfx___split_vma+0x10/0x10 [ 30.408804] ? find_held_lock+0x2c/0x110 [ 30.409176] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.409577] ? lock_is_held_type+0x9f/0x120 [ 30.409971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.410422] ? mtree_range_walk+0x632/0x900 [ 30.410813] ? mas_walk+0x5c7/0x7c0 [ 30.411155] do_vmi_munmap+0x1f1/0x2b0 [ 30.411534] mmap_region+0x1f9/0x2660 [ 30.411881] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.412244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.412787] ? __pfx_lock_acquire+0x10/0x10 [ 30.413167] ? __pfx_mmap_region+0x10/0x10 [ 30.413550] ? security_mmap_addr+0x7d/0xa0 [ 30.413932] ? get_unmapped_area+0x1f5/0x3f0 [ 30.414358] do_mmap+0x854/0xf00 [ 30.414673] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.415028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.415444] ksys_mmap_pgoff+0x3af/0x500 [ 30.415814] do_syscall_64+0x3f/0x90 [ 30.416164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.416629] RIP: 0033:0x7fa17eb3bd82 [ 30.416963] 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 [ 30.418543] RSP: 002b:00007fffd2acf278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.419200] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa17eb3bd82 [ 30.419846] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa17df75000 [ 30.420450] RBP: 00007fa17df75000 R08: 0000000000000009 R09: 0000000000001000 [ 30.421074] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558585ec3ec0 [ 30.421692] R13: 00007fffd2acf290 R14: 00007fffd2acf2c0 R15: 00007fffd2acf620 [ 30.422334] [ 30.422544] [ 30.422695] Allocated by task 212: [ 30.423012] kasan_save_stack+0x22/0x50 [ 30.423367] kasan_set_track+0x25/0x30 [ 30.423717] __kasan_slab_alloc+0x59/0x70 [ 30.424088] kmem_cache_alloc+0x16b/0x370 [ 30.424469] vm_area_dup+0x20/0x160 [ 30.424788] __split_vma+0x170/0x950 [ 30.425120] split_vma+0xc6/0x110 [ 30.425429] mprotect_fixup+0x8d2/0xb30 [ 30.425791] do_mprotect_pkey+0x87e/0xd40 [ 30.426177] __x64_sys_mprotect+0x78/0xc0 [ 30.426550] do_syscall_64+0x3f/0x90 [ 30.426881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.427330] [ 30.427483] Freed by task 202: [ 30.427764] kasan_save_stack+0x22/0x50 [ 30.428119] kasan_set_track+0x25/0x30 [ 30.428472] kasan_save_free_info+0x2b/0x50 [ 30.428849] __kasan_slab_free+0x10a/0x190 [ 30.429225] kmem_cache_free+0x10d/0x4d0 [ 30.429586] rcu_core+0x8c8/0x2860 [ 30.429903] __do_softirq+0x1b7/0x7d4 [ 30.430263] [ 30.430429] Last potentially related work creation: [ 30.430844] kasan_save_stack+0x22/0x50 [ 30.431204] __kasan_record_aux_stack+0x8e/0xa0 [ 30.431615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.432067] remove_vma+0x139/0x170 [ 30.432402] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.432804] do_vmi_munmap+0x1f1/0x2b0 [ 30.433152] __vm_munmap+0x138/0x3a0 [ 30.433498] __x64_sys_munmap+0x59/0x80 [ 30.433850] do_syscall_64+0x3f/0x90 [ 30.434223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.434675] [ 30.434824] The buggy address belongs to the object at ffff888018324910 [ 30.434824] which belongs to the cache vm_area_struct of size 168 [ 30.435883] The buggy address is located 88 bytes inside of [ 30.435883] freed 168-byte region [ffff888018324910, ffff8880183249b8) [ 30.436896] [ 30.437054] The buggy address belongs to the physical page: [ 30.437535] page:00000000820045cb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18324 [ 30.438339] memcg:ffff88800c563e01 [ 30.438641] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.439096] page_type: 0xffffffff() [ 30.439412] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.440058] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c563e01 [ 30.440705] page dumped because: kasan: bad access detected [ 30.441176] [ 30.441335] Memory state around the buggy address: [ 30.441752] ffff888018324800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.442394] ffff888018324880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.443010] >ffff888018324900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.443626] ^ [ 30.444184] ffff888018324980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.444800] ffff888018324a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.445419] ================================================================== [ 30.446233] Disabling lock debugging due to kernel taint [ 31.951725] BUG: Bad rss-counter state mm:000000007e4e2ced type:MM_FILEPAGES val:33 [ 31.952459] BUG: Bad rss-counter state mm:000000007e4e2ced type:MM_ANONPAGES val:22 [ 32.332925] BUG: Bad rss-counter state mm:00000000e627c90f type:MM_FILEPAGES val:33 [ 32.333669] BUG: Bad rss-counter state mm:00000000e627c90f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24108' (ECDSA) to the list of known hosts. 2023/06/21 09:14:08 fuzzer started 2023/06/21 09:14:08 dialing manager at localhost:36067 2023/06/21 09:14:08 checking machine... 2023/06/21 09:14:08 checking revisions... [ 32.869680] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:14:08 testing simple program... [ 32.899258] cgroup: Unknown subsys name 'net' [ 32.946796] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:14:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc5a08fbe8 CR3=0000000015948000 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=2038303a34313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a34313a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800dd5ad90 RBX=ffff88806cf09ee8 RCX=1ffff11001bab5b2 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=0000000000000007 RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800d6cec80 RIP=ffffffff8137fcd4 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 00007f1d3833a900 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=00007fff87f46000 CR3=0000000016016000 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