syzkaller login: [ 30.399887] BUG: Bad rss-counter state mm:0000000002f654b1 type:MM_FILEPAGES val:33 [ 30.401067] BUG: Bad rss-counter state mm:0000000002f654b1 type:MM_ANONPAGES val:22 [ 30.548478] ================================================================== [ 30.549674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.550928] Read of size 8 at addr ffff8880182f7d08 by task sshd/220 [ 30.551996] [ 30.552219] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.553082] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.554060] Call Trace: [ 30.554382] [ 30.554676] dump_stack_lvl+0x91/0xf0 [ 30.555215] print_report+0xcc/0x620 [ 30.555738] ? __virt_addr_valid+0x102/0x340 [ 30.556321] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.556995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.557681] kasan_report+0xbe/0xf0 [ 30.558199] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.558865] vma_interval_tree_remove+0xc75/0xec0 [ 30.559512] vma_prepare+0xc54/0x11a0 [ 30.560038] __split_vma+0x5af/0x950 [ 30.560546] ? __pfx___split_vma+0x10/0x10 [ 30.561127] ? find_held_lock+0x2c/0x110 [ 30.561698] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.562324] ? lock_is_held_type+0x9f/0x120 [ 30.562920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.563586] ? mtree_range_walk+0x632/0x900 [ 30.564181] ? mas_walk+0x5c7/0x7c0 [ 30.564698] do_vmi_munmap+0x1f1/0x2b0 [ 30.565234] mmap_region+0x1f9/0x2660 [ 30.565770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.566345] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.567126] ? __pfx_lock_acquire+0x10/0x10 [ 30.567710] ? __pfx_mmap_region+0x10/0x10 [ 30.568285] ? security_mmap_addr+0x7d/0xa0 [ 30.568870] ? get_unmapped_area+0x1f5/0x3f0 [ 30.569468] do_mmap+0x854/0xf00 [ 30.569957] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.570497] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.571113] ksys_mmap_pgoff+0x3af/0x500 [ 30.571666] do_syscall_64+0x3f/0x90 [ 30.572195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.572906] RIP: 0033:0x7fe8c7be4d82 [ 30.573408] 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 [ 30.575770] RSP: 002b:00007ffd6539c5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.576756] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe8c7be4d82 [ 30.577692] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8c701e000 [ 30.578641] RBP: 00007fe8c701e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.579579] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7f3aa3b20 [ 30.580522] R13: 00007ffd6539c610 R14: 00007ffd6539c640 R15: 00007ffd6539c9a0 [ 30.581489] [ 30.581818] [ 30.582080] Allocated by task 213: [ 30.582553] kasan_save_stack+0x22/0x50 [ 30.583105] kasan_set_track+0x25/0x30 [ 30.583644] __kasan_slab_alloc+0x59/0x70 [ 30.584213] kmem_cache_alloc+0x16b/0x370 [ 30.584778] vm_area_dup+0x20/0x160 [ 30.585271] __split_vma+0x170/0x950 [ 30.585780] split_vma+0xc6/0x110 [ 30.586280] mprotect_fixup+0x8d2/0xb30 [ 30.586821] do_mprotect_pkey+0x87e/0xd40 [ 30.587393] __x64_sys_mprotect+0x78/0xc0 [ 30.587969] do_syscall_64+0x3f/0x90 [ 30.588487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.589196] [ 30.589429] Freed by task 213: [ 30.589866] kasan_save_stack+0x22/0x50 [ 30.590434] kasan_set_track+0x25/0x30 [ 30.590972] kasan_save_free_info+0x2b/0x50 [ 30.591551] __kasan_slab_free+0x10a/0x190 [ 30.592230] kmem_cache_free+0x10d/0x4d0 [ 30.592779] rcu_core+0x8c8/0x2860 [ 30.593267] __do_softirq+0x1b7/0x7d4 [ 30.593793] [ 30.594046] Last potentially related work creation: [ 30.594696] kasan_save_stack+0x22/0x50 [ 30.595250] __kasan_record_aux_stack+0x8e/0xa0 [ 30.595877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.596571] remove_vma+0x139/0x170 [ 30.597065] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.597677] do_vmi_munmap+0x1f1/0x2b0 [ 30.598219] __vm_munmap+0x138/0x3a0 [ 30.598727] __x64_sys_munmap+0x59/0x80 [ 30.599271] do_syscall_64+0x3f/0x90 [ 30.599804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.600505] [ 30.600751] The buggy address belongs to the object at ffff8880182f7cb0 [ 30.600751] which belongs to the cache vm_area_struct of size 168 [ 30.602363] The buggy address is located 88 bytes inside of [ 30.602363] freed 168-byte region [ffff8880182f7cb0, ffff8880182f7d58) [ 30.603933] [ 30.604169] The buggy address belongs to the physical page: [ 30.604898] page:00000000bfa1d04f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182f7 [ 30.606110] memcg:ffff88801a188d01 [ 30.606580] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.607289] page_type: 0xffffffff() [ 30.607784] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.608800] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a188d01 [ 30.609802] page dumped because: kasan: bad access detected [ 30.610543] [ 30.610774] Memory state around the buggy address: [ 30.611414] ffff8880182f7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.612354] ffff8880182f7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.613296] >ffff8880182f7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.614236] ^ [ 30.614757] ffff8880182f7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.615808] ffff8880182f7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.616860] ================================================================== [ 30.617995] Disabling lock debugging due to kernel taint [ 32.884729] BUG: Bad rss-counter state mm:0000000001e6a915 type:MM_FILEPAGES val:33 [ 32.885710] BUG: Bad rss-counter state mm:0000000001e6a915 type:MM_ANONPAGES val:22 [ 33.418069] BUG: Bad rss-counter state mm:000000002045a0f4 type:MM_FILEPAGES val:33 [ 33.419191] BUG: Bad rss-counter state mm:000000002045a0f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48053' (ECDSA) to the list of known hosts. 2023/06/21 02:08:35 fuzzer started 2023/06/21 02:08:35 dialing manager at localhost:36067 2023/06/21 02:08:35 checking machine... 2023/06/21 02:08:35 checking revisions... [ 34.071945] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:08:35 testing simple program... [ 34.125295] cgroup: Unknown subsys name 'net' [ 34.170280] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:08:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888019c3f670 RSP=ffff888019c3f5b0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff888008442280 R13=ffff88806ce3d1a0 R14=ffff88806ce3d1a0 R15=ffff88806ce3d180 RIP=ffffffff81806fdf RFL=00000086 [--S--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 00007fa48096d900 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=00007ffc78877000 CR3=000000000e398000 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=0000000000020db7 RBX=0000000000000002 RCX=ffffffff8180ca59 RDX=0000000000000013 RSI=ffffffff86138f52 RDI=ffffffff85dfe0a0 RBP=ffff88806cf09af0 RSP=ffff88806cf09a18 R8 =ffffffff86138f52 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc12 RFL=00000202 [-------] 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=00007f685db928c0 CR3=000000000e03e000 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=38303a3230203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363234 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000