syzkaller login: [ 31.261237] BUG: Bad rss-counter state mm:0000000025171fcc type:MM_FILEPAGES val:33 [ 31.262473] BUG: Bad rss-counter state mm:0000000025171fcc type:MM_ANONPAGES val:22 [ 31.415211] ================================================================== [ 31.416322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.417255] Read of size 8 at addr ffff88801625bb38 by task sshd/223 [ 31.418128] [ 31.418350] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.419205] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.420209] Call Trace: [ 31.420528] [ 31.420808] dump_stack_lvl+0x91/0xf0 [ 31.421294] print_report+0xcc/0x620 [ 31.421774] ? __virt_addr_valid+0x102/0x340 [ 31.422324] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.422937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.423558] kasan_report+0xbe/0xf0 [ 31.424031] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.424643] vma_interval_tree_remove+0xc75/0xec0 [ 31.425236] vma_prepare+0xc54/0x11a0 [ 31.425714] __split_vma+0x5af/0x950 [ 31.426179] ? __pfx___split_vma+0x10/0x10 [ 31.426698] ? find_held_lock+0x2c/0x110 [ 31.427209] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.427779] ? lock_is_held_type+0x9f/0x120 [ 31.428308] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.428906] ? mtree_range_walk+0x632/0x900 [ 31.429450] ? mas_walk+0x5c7/0x7c0 [ 31.429918] do_vmi_munmap+0x1f1/0x2b0 [ 31.430401] mmap_region+0x1f9/0x2660 [ 31.430871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.431380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.432096] ? __pfx_lock_acquire+0x10/0x10 [ 31.432622] ? __pfx_mmap_region+0x10/0x10 [ 31.433143] ? security_mmap_addr+0x7d/0xa0 [ 31.433661] ? get_unmapped_area+0x1f5/0x3f0 [ 31.434204] do_mmap+0x854/0xf00 [ 31.434637] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.435125] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.435698] ksys_mmap_pgoff+0x3af/0x500 [ 31.436206] do_syscall_64+0x3f/0x90 [ 31.436683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.437317] RIP: 0033:0x7f49cd80bd82 [ 31.437766] 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 [ 31.439867] RSP: 002b:00007fff62b80538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.440755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49cd80bd82 [ 31.441587] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49ccc45000 [ 31.442418] RBP: 00007f49ccc45000 R08: 0000000000000009 R09: 0000000000001000 [ 31.443260] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563fc8946f70 [ 31.444111] R13: 00007fff62b80550 R14: 00007fff62b80580 R15: 00007fff62b808e0 [ 31.444956] [ 31.445241] [ 31.445456] Allocated by task 215: [ 31.445878] kasan_save_stack+0x22/0x50 [ 31.446371] kasan_set_track+0x25/0x30 [ 31.446856] __kasan_slab_alloc+0x59/0x70 [ 31.447370] kmem_cache_alloc+0x16b/0x370 [ 31.447894] vm_area_dup+0x20/0x160 [ 31.448342] __split_vma+0x170/0x950 [ 31.448817] split_vma+0xc6/0x110 [ 31.449256] mprotect_fixup+0x8d2/0xb30 [ 31.449752] do_mprotect_pkey+0x87e/0xd40 [ 31.450263] __x64_sys_mprotect+0x78/0xc0 [ 31.450776] do_syscall_64+0x3f/0x90 [ 31.451243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.451892] [ 31.452105] Freed by task 215: [ 31.452490] kasan_save_stack+0x22/0x50 [ 31.452987] kasan_set_track+0x25/0x30 [ 31.453472] kasan_save_free_info+0x2b/0x50 [ 31.454000] __kasan_slab_free+0x10a/0x190 [ 31.454526] kmem_cache_free+0x10d/0x4d0 [ 31.455026] rcu_core+0x8c8/0x2860 [ 31.455484] __do_softirq+0x1b7/0x7d4 [ 31.455957] [ 31.456169] Last potentially related work creation: [ 31.456740] kasan_save_stack+0x22/0x50 [ 31.457238] __kasan_record_aux_stack+0x8e/0xa0 [ 31.457802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.458435] remove_vma+0x139/0x170 [ 31.458881] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.459437] do_vmi_munmap+0x1f1/0x2b0 [ 31.459925] __vm_munmap+0x138/0x3a0 [ 31.460381] __x64_sys_munmap+0x59/0x80 [ 31.460872] do_syscall_64+0x3f/0x90 [ 31.461345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.461981] [ 31.462193] The buggy address belongs to the object at ffff88801625bae0 [ 31.462193] which belongs to the cache vm_area_struct of size 168 [ 31.463657] The buggy address is located 88 bytes inside of [ 31.463657] freed 168-byte region [ffff88801625bae0, ffff88801625bb88) [ 31.465033] [ 31.465246] The buggy address belongs to the physical page: [ 31.465899] page:000000009563ecd1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1625b [ 31.466970] memcg:ffff888016efb901 [ 31.467388] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.468036] page_type: 0xffffffff() [ 31.468480] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.469380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016efb901 [ 31.470265] page dumped because: kasan: bad access detected [ 31.470915] [ 31.471129] Memory state around the buggy address: [ 31.471709] ffff88801625ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.472546] ffff88801625ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.473389] >ffff88801625bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.474231] ^ [ 31.474831] ffff88801625bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.475692] ffff88801625bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.476538] ================================================================== [ 31.477499] Disabling lock debugging due to kernel taint [ 33.376427] BUG: Bad rss-counter state mm:00000000d95ca265 type:MM_FILEPAGES val:33 [ 33.377473] BUG: Bad rss-counter state mm:00000000d95ca265 type:MM_ANONPAGES val:22 [ 33.837929] BUG: Bad rss-counter state mm:0000000011378d23 type:MM_FILEPAGES val:33 [ 33.838950] BUG: Bad rss-counter state mm:0000000011378d23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63482' (ECDSA) to the list of known hosts. 2023/06/21 02:16:29 fuzzer started 2023/06/21 02:16:29 dialing manager at localhost:36067 2023/06/21 02:16:29 checking machine... 2023/06/21 02:16:29 checking revisions... [ 34.560999] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:16:29 testing simple program... [ 34.612310] cgroup: Unknown subsys name 'net' [ 34.668223] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:16:28 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888009a6f318 RCX=ffffffff83ab193d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f97e40 RBP=0000000075ffffa9 RSP=ffff88801863f508 R8 =0000000000000000 R9 =fffffbfff0ff2fc8 R10=ffffffff87f97e43 R11=00000a0f00000a0f R12=0000000000000000 R13=0000000000000063 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab196d 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 00007f55bbac0900 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=00007fff25d89000 CR3=000000000c43a000 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=0000006f730074696d7265705f6d6170 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=00007f6a1fb6bb00 CR3=000000000f878000 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=2038323a36313a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36313a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000