syzkaller login: [ 38.674188] BUG: Bad rss-counter state mm:00000000b9f468c9 type:MM_FILEPAGES val:33 [ 38.680237] BUG: Bad rss-counter state mm:00000000b9f468c9 type:MM_ANONPAGES val:22 [ 38.886139] ================================================================== [ 38.886800] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.887462] Read of size 8 at addr ffff888017836880 by task sshd/223 [ 38.888015] [ 38.888159] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.888709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.889385] Call Trace: [ 38.889595] [ 38.889782] dump_stack_lvl+0x91/0xf0 [ 38.890151] print_report+0xcc/0x620 [ 38.890471] ? __virt_addr_valid+0x102/0x340 [ 38.890860] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892740] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893136] kasan_report+0xbe/0xf0 [ 38.893482] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893883] vma_interval_tree_remove+0xc75/0xec0 [ 38.894258] vma_prepare+0xc54/0x11a0 [ 38.895946] __split_vma+0x5af/0x950 [ 38.896242] ? __pfx___split_vma+0x10/0x10 [ 38.896575] ? find_held_lock+0x2c/0x110 [ 38.896951] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.897302] ? lock_is_held_type+0x9f/0x120 [ 38.897638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.898068] ? mtree_range_walk+0x632/0x900 [ 38.898416] ? mas_walk+0x5c7/0x7c0 [ 38.898759] do_vmi_munmap+0x1f1/0x2b0 [ 38.899113] mmap_region+0x1f9/0x2660 [ 38.899415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.899732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.900211] ? __pfx_lock_acquire+0x10/0x10 [ 38.900542] ? __pfx_mmap_region+0x10/0x10 [ 38.900869] ? security_mmap_addr+0x7d/0xa0 [ 38.901247] ? get_unmapped_area+0x1f5/0x3f0 [ 38.901587] do_mmap+0x854/0xf00 [ 38.901877] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.902230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.902771] ksys_mmap_pgoff+0x3af/0x500 [ 38.903165] do_syscall_64+0x3f/0x90 [ 38.903525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903929] RIP: 0033:0x7fa2571fed82 [ 38.904256] 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 [ 38.905601] RSP: 002b:00007ffc10beb4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa2571fed82 [ 38.906844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa256638000 [ 38.907415] RBP: 00007fa256638000 R08: 0000000000000009 R09: 0000000000001000 [ 38.907934] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563b55b24f60 [ 38.908494] R13: 00007ffc10beb4d0 R14: 00007ffc10beb500 R15: 00007ffc10beb860 [ 38.909019] [ 38.909251] [ 38.909386] Allocated by task 214: [ 38.909650] kasan_save_stack+0x22/0x50 [ 38.909980] kasan_set_track+0x25/0x30 [ 38.910330] __kasan_slab_alloc+0x59/0x70 [ 38.910771] kmem_cache_alloc+0x16b/0x370 [ 38.911091] vm_area_dup+0x20/0x160 [ 38.911425] __split_vma+0x170/0x950 [ 38.911715] split_vma+0xc6/0x110 [ 38.911985] mprotect_fixup+0x8d2/0xb30 [ 38.912343] do_mprotect_pkey+0x87e/0xd40 [ 38.912670] __x64_sys_mprotect+0x78/0xc0 [ 38.912993] do_syscall_64+0x3f/0x90 [ 38.913338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913746] [ 38.913891] Freed by task 214: [ 38.914134] kasan_save_stack+0x22/0x50 [ 38.914489] kasan_set_track+0x25/0x30 [ 38.914841] kasan_save_free_info+0x2b/0x50 [ 38.915169] __kasan_slab_free+0x10a/0x190 [ 38.915546] kmem_cache_free+0x10d/0x4d0 [ 38.915862] rcu_core+0x8c8/0x2860 [ 38.916135] __do_softirq+0x1b7/0x7d4 [ 38.916600] [ 38.916736] Last potentially related work creation: [ 38.917092] kasan_save_stack+0x22/0x50 [ 38.917456] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918223] remove_vma+0x139/0x170 [ 38.918546] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.918941] do_vmi_munmap+0x1f1/0x2b0 [ 38.919243] __vm_munmap+0x138/0x3a0 [ 38.919583] __x64_sys_munmap+0x59/0x80 [ 38.919893] do_syscall_64+0x3f/0x90 [ 38.920186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920632] [ 38.920767] The buggy address belongs to the object at ffff888017836828 [ 38.920767] which belongs to the cache vm_area_struct of size 168 [ 38.921709] The buggy address is located 88 bytes inside of [ 38.921709] freed 168-byte region [ffff888017836828, ffff8880178368d0) [ 38.922636] [ 38.922812] The buggy address belongs to the physical page: [ 38.923215] page:000000005ea2c30a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17836 [ 38.923932] memcg:ffff88800e68d301 [ 38.924195] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.924666] page_type: 0xffffffff() [ 38.924961] raw: 0100000000000200 ffff8880087a0c80 ffffea00005eaf80 dead000000000005 [ 38.925521] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e68d301 [ 38.926124] page dumped because: kasan: bad access detected [ 38.926528] [ 38.926755] Memory state around the buggy address: [ 38.927122] ffff888017836780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.927697] ffff888017836800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.928220] >ffff888017836880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.928787] ^ [ 38.929044] ffff888017836900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.929565] ffff888017836980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.930131] ================================================================== [ 38.930883] Disabling lock debugging due to kernel taint [ 44.527314] BUG: Bad rss-counter state mm:000000005964a228 type:MM_FILEPAGES val:33 [ 44.527987] BUG: Bad rss-counter state mm:000000005964a228 type:MM_ANONPAGES val:22 [ 45.689911] BUG: Bad rss-counter state mm:0000000082ce9425 type:MM_FILEPAGES val:33 [ 45.690532] BUG: Bad rss-counter state mm:0000000082ce9425 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47802' (ECDSA) to the list of known hosts. 2023/06/21 08:19:38 fuzzer started 2023/06/21 08:19:39 dialing manager at localhost:36067 2023/06/21 08:19:39 checking machine... 2023/06/21 08:19:39 checking revisions... 2023/06/21 08:19:39 testing simple program... [ 46.572407] kmemleak: Automatic memory scanning thread ended [ 46.633613] cgroup: Unknown subsys name 'net' [ 46.678624] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:19:39 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff84d2ed20 RCX=ffffffff818df6ff RDX=ffff888019d38000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888017b3fd80 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880195ec000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c086b 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 00007f8945fca900 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=00007f8945fca6f8 CR3=0000000009c66000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000001f189a25e8 RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000001f RSI=ffff88806cf28140 RDI=00000000000058f6 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=000000000000fea7 R11=ffff88806cf09ff8 R12=00000000000058f6 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000012 [----A--] 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 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=0000561862ef04d0 CR3=0000000009c66000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000