syzkaller login: [ 38.659591] BUG: Bad rss-counter state mm:00000000112af66d type:MM_FILEPAGES val:33 [ 38.660587] BUG: Bad rss-counter state mm:00000000112af66d type:MM_ANONPAGES val:22 [ 38.823891] ================================================================== [ 38.824780] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.825744] Read of size 8 at addr ffff8880141c1058 by task sshd/219 [ 38.826511] [ 38.826727] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.827650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.828617] Call Trace: [ 38.828937] [ 38.829228] dump_stack_lvl+0x91/0xf0 [ 38.829745] print_report+0xcc/0x620 [ 38.830240] ? __virt_addr_valid+0x102/0x340 [ 38.830793] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.831430] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.832051] kasan_report+0xbe/0xf0 [ 38.832522] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833139] vma_interval_tree_remove+0xc75/0xec0 [ 38.833746] vma_prepare+0xc54/0x11a0 [ 38.834226] __split_vma+0x5af/0x950 [ 38.834700] ? __pfx___split_vma+0x10/0x10 [ 38.835220] ? find_held_lock+0x2c/0x110 [ 38.835738] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.836305] ? lock_is_held_type+0x9f/0x120 [ 38.836849] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.837464] ? mtree_range_walk+0x632/0x900 [ 38.838026] ? mas_walk+0x5c7/0x7c0 [ 38.838498] do_vmi_munmap+0x1f1/0x2b0 [ 38.838990] mmap_region+0x1f9/0x2660 [ 38.839466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.839978] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.840688] ? __pfx_lock_acquire+0x10/0x10 [ 38.841221] ? __pfx_mmap_region+0x10/0x10 [ 38.841757] ? security_mmap_addr+0x7d/0xa0 [ 38.842289] ? get_unmapped_area+0x1f5/0x3f0 [ 38.842836] do_mmap+0x854/0xf00 [ 38.843274] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.843764] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.844324] ksys_mmap_pgoff+0x3af/0x500 [ 38.844841] do_syscall_64+0x3f/0x90 [ 38.845326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.845990] RIP: 0033:0x7f222ec2ed82 [ 38.846449] 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 [ 38.848627] RSP: 002b:00007fffe746e448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.849568] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f222ec2ed82 [ 38.850441] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f222e068000 [ 38.851311] RBP: 00007f222e068000 R08: 0000000000000009 R09: 0000000000001000 [ 38.852197] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561077276ec0 [ 38.853066] R13: 00007fffe746e460 R14: 00007fffe746e490 R15: 00007fffe746e7f0 [ 38.853935] [ 38.854229] [ 38.854443] Allocated by task 212: [ 38.854874] kasan_save_stack+0x22/0x50 [ 38.855377] kasan_set_track+0x25/0x30 [ 38.855872] __kasan_slab_alloc+0x59/0x70 [ 38.856402] kmem_cache_alloc+0x16b/0x370 [ 38.856938] vm_area_dup+0x20/0x160 [ 38.857434] __split_vma+0x170/0x950 [ 38.857927] split_vma+0xc6/0x110 [ 38.858362] mprotect_fixup+0x8d2/0xb30 [ 38.858861] do_mprotect_pkey+0x87e/0xd40 [ 38.859376] __x64_sys_mprotect+0x78/0xc0 [ 38.859899] do_syscall_64+0x3f/0x90 [ 38.860379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.861035] [ 38.861258] Freed by task 212: [ 38.861687] kasan_save_stack+0x22/0x50 [ 38.862188] kasan_set_track+0x25/0x30 [ 38.862681] kasan_save_free_info+0x2b/0x50 [ 38.863238] __kasan_slab_free+0x10a/0x190 [ 38.863784] kmem_cache_free+0x10d/0x4d0 [ 38.864302] rcu_core+0x8c8/0x2860 [ 38.864742] __do_softirq+0x1b7/0x7d4 [ 38.865233] [ 38.865455] Last potentially related work creation: [ 38.866039] kasan_save_stack+0x22/0x50 [ 38.866558] __kasan_record_aux_stack+0x8e/0xa0 [ 38.867146] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.867791] remove_vma+0x139/0x170 [ 38.868239] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.868791] do_vmi_munmap+0x1f1/0x2b0 [ 38.869275] __vm_munmap+0x138/0x3a0 [ 38.869759] __x64_sys_munmap+0x59/0x80 [ 38.870252] do_syscall_64+0x3f/0x90 [ 38.870723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871363] [ 38.871579] Second to last potentially related work creation: [ 38.872262] kasan_save_stack+0x22/0x50 [ 38.872767] __kasan_record_aux_stack+0x8e/0xa0 [ 38.873341] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.873994] remove_vma+0x139/0x170 [ 38.874458] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.875016] do_vmi_munmap+0x1f1/0x2b0 [ 38.875496] mmap_region+0x1f9/0x2660 [ 38.875975] do_mmap+0x854/0xf00 [ 38.876419] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.876906] ksys_mmap_pgoff+0x3af/0x500 [ 38.877403] do_syscall_64+0x3f/0x90 [ 38.877896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.878540] [ 38.878758] The buggy address belongs to the object at ffff8880141c1000 [ 38.878758] which belongs to the cache vm_area_struct of size 168 [ 38.880223] The buggy address is located 88 bytes inside of [ 38.880223] freed 168-byte region [ffff8880141c1000, ffff8880141c10a8) [ 38.881641] [ 38.881858] The buggy address belongs to the physical page: [ 38.882513] page:00000000a82a9907 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x141c1 [ 38.883596] memcg:ffff888006816101 [ 38.884024] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.884721] page_type: 0xffffffff() [ 38.885167] raw: 0100000000000200 ffff8880087a0c80 ffffea0000253980 dead000000000005 [ 38.886092] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006816101 [ 38.886993] page dumped because: kasan: bad access detected [ 38.887657] [ 38.887873] Memory state around the buggy address: [ 38.888455] ffff8880141c0f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.889316] ffff8880141c0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.890179] >ffff8880141c1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.891017] ^ [ 38.891746] ffff8880141c1080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.892585] ffff8880141c1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.893422] ================================================================== [ 38.894379] Disabling lock debugging due to kernel taint [ 40.659538] BUG: Bad rss-counter state mm:00000000c9022329 type:MM_FILEPAGES val:33 [ 40.660300] BUG: Bad rss-counter state mm:00000000c9022329 type:MM_ANONPAGES val:22 [ 41.110704] BUG: Bad rss-counter state mm:000000008907ee66 type:MM_FILEPAGES val:33 [ 41.111800] BUG: Bad rss-counter state mm:000000008907ee66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2496' (ECDSA) to the list of known hosts. 2023/06/20 23:05:35 fuzzer started 2023/06/20 23:05:35 dialing manager at localhost:36067 2023/06/20 23:05:35 checking machine... 2023/06/20 23:05:35 checking revisions... [ 41.801888] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:05:35 testing simple program... [ 41.856222] cgroup: Unknown subsys name 'net' [ 41.907478] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:05:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000001f RCX=0000000000000000 RDX=ffff8880143a0000 RSI=ffffffff81f57b33 RDI=0000000000000001 RBP=000000000000001f RSP=ffff888018ee7a70 R8 =0000000000000000 R9 =ffff888018ee7d68 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888018ee7d68 R13=0000000000000001 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff814c089b 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 00007ff4ef3fc900 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=00007fff56526000 CR3=000000000fd94000 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=35303a3332203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383630 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c04400 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=00007f3cf2eba000 CR3=0000000009486000 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=2413d7f37c462fa9084c11ea9bd56e1b XMM02=2c67c8bc2e329bc3000000000011b9c8 XMM03=fb795ef6d65770560000000000121bf0 XMM04=180594cd43e7af4000000000000ae988 XMM05=e4cb8bb95a7664b60000000000132a58 XMM06=d2a9895269df04420000000000131c30 XMM07=e042d86d42eb936e0000000000121ec8 XMM08=dc09ebca623f8065000000000011ba28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000