syzkaller login: [ 31.190836] sshd (212) used greatest stack depth: 24088 bytes left [ 31.192806] BUG: Bad rss-counter state mm:00000000ace7d72c type:MM_FILEPAGES val:33 [ 31.194821] BUG: Bad rss-counter state mm:00000000ace7d72c type:MM_ANONPAGES val:22 [ 31.350044] ================================================================== [ 31.351192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.352372] Read of size 8 at addr ffff88800ca45228 by task sshd/219 [ 31.353483] [ 31.353753] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.354847] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.356142] Call Trace: [ 31.356539] <TASK> [ 31.356883] dump_stack_lvl+0x91/0xf0 [ 31.357475] print_report+0xcc/0x620 [ 31.358069] ? __virt_addr_valid+0x102/0x340 [ 31.358752] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.359511] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.360285] kasan_report+0xbe/0xf0 [ 31.360870] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.361640] vma_interval_tree_remove+0xc75/0xec0 [ 31.362381] vma_prepare+0xc54/0x11a0 [ 31.362976] __split_vma+0x5af/0x950 [ 31.363577] ? __pfx___split_vma+0x10/0x10 [ 31.364223] ? find_held_lock+0x2c/0x110 [ 31.364869] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.365510] ? lock_is_held_type+0x9f/0x120 [ 31.366023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.366595] ? mtree_range_walk+0x632/0x900 [ 31.367114] ? mas_walk+0x5c7/0x7c0 [ 31.367584] do_vmi_munmap+0x1f1/0x2b0 [ 31.368052] mmap_region+0x1f9/0x2660 [ 31.368507] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.368990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.369668] ? __pfx_lock_acquire+0x10/0x10 [ 31.370174] ? __pfx_mmap_region+0x10/0x10 [ 31.370674] ? security_mmap_addr+0x7d/0xa0 [ 31.371175] ? get_unmapped_area+0x1f5/0x3f0 [ 31.371709] do_mmap+0x854/0xf00 [ 31.372128] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.372600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.373138] ksys_mmap_pgoff+0x3af/0x500 [ 31.373620] do_syscall_64+0x3f/0x90 [ 31.374078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374699] RIP: 0033:0x7f3e5bd46d82 [ 31.375134] 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 [ 31.377161] RSP: 002b:00007ffc19575318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.378097] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e5bd46d82 [ 31.378969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e5b180000 [ 31.379828] RBP: 00007f3e5b180000 R08: 0000000000000009 R09: 0000000000001000 [ 31.380685] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559909a8dd90 [ 31.381523] R13: 00007ffc19575330 R14: 00007ffc19575360 R15: 00007ffc195756c0 [ 31.382377] </TASK> [ 31.382664] [ 31.382876] Allocated by task 212: [ 31.383303] kasan_save_stack+0x22/0x50 [ 31.383813] kasan_set_track+0x25/0x30 [ 31.384312] __kasan_slab_alloc+0x59/0x70 [ 31.384837] kmem_cache_alloc+0x16b/0x370 [ 31.385349] vm_area_dup+0x20/0x160 [ 31.385799] __split_vma+0x170/0x950 [ 31.386276] split_vma+0xc6/0x110 [ 31.386709] mprotect_fixup+0x8d2/0xb30 [ 31.387204] do_mprotect_pkey+0x87e/0xd40 [ 31.387749] __x64_sys_mprotect+0x78/0xc0 [ 31.388269] do_syscall_64+0x3f/0x90 [ 31.388756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.389398] [ 31.389613] Freed by task 212: [ 31.390001] kasan_save_stack+0x22/0x50 [ 31.390505] kasan_set_track+0x25/0x30 [ 31.390997] kasan_save_free_info+0x2b/0x50 [ 31.391523] __kasan_slab_free+0x10a/0x190 [ 31.392067] kmem_cache_free+0x10d/0x4d0 [ 31.392578] rcu_core+0x8c8/0x2860 [ 31.393018] __do_softirq+0x1b7/0x7d4 [ 31.393492] [ 31.393760] Last potentially related work creation: [ 31.394358] kasan_save_stack+0x22/0x50 [ 31.394857] __kasan_record_aux_stack+0x8e/0xa0 [ 31.395427] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.396095] remove_vma+0x139/0x170 [ 31.396554] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.397109] do_vmi_munmap+0x1f1/0x2b0 [ 31.397598] __vm_munmap+0x138/0x3a0 [ 31.398063] __x64_sys_munmap+0x59/0x80 [ 31.398562] do_syscall_64+0x3f/0x90 [ 31.399033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399683] [ 31.399895] The buggy address belongs to the object at ffff88800ca451d0 [ 31.399895] which belongs to the cache vm_area_struct of size 168 [ 31.401362] The buggy address is located 88 bytes inside of [ 31.401362] freed 168-byte region [ffff88800ca451d0, ffff88800ca45278) [ 31.402776] [ 31.402990] The buggy address belongs to the physical page: [ 31.403663] page:00000000eb281343 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca45 [ 31.404749] memcg:ffff88801991f801 [ 31.405172] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.405813] page_type: 0xffffffff() [ 31.406267] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.407181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801991f801 [ 31.408111] page dumped because: kasan: bad access detected [ 31.408771] [ 31.408987] Memory state around the buggy address: [ 31.409572] ffff88800ca45100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.410425] ffff88800ca45180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.411281] >ffff88800ca45200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.412150] ^ [ 31.412711] ffff88800ca45280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.413564] ffff88800ca45300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.414420] ================================================================== [ 31.415388] Disabling lock debugging due to kernel taint [ 33.989545] BUG: Bad rss-counter state mm:00000000eb2c2cfd type:MM_FILEPAGES val:33 [ 33.990771] BUG: Bad rss-counter state mm:00000000eb2c2cfd type:MM_ANONPAGES val:22 [ 34.447855] BUG: Bad rss-counter state mm:00000000751ebb44 type:MM_FILEPAGES val:33 [ 34.449011] BUG: Bad rss-counter state mm:00000000751ebb44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50555' (ECDSA) to the list of known hosts. 2023/06/21 04:04:41 fuzzer started 2023/06/21 04:04:41 dialing manager at localhost:36067 2023/06/21 04:04:41 checking machine... 2023/06/21 04:04:41 checking revisions... [ 35.099400] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:04:41 testing simple program... [ 35.153027] cgroup: Unknown subsys name 'net' [ 35.201534] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:04:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81894f4f RDX=ffff888015e3d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008c2de08 RSP=ffff888016f2f8c0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=ffffffff856f0da0 R14=ffff888016f2f928 R15=ffff888016f2fd36 RIP=ffffffff814c0860 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 00007f5c32ee8900 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=00007f5c32406000 CR3=000000000c628000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a390e771534d104b00000000000ae988 XMM05=11dcd9accf2caa810000000000132d60 XMM06=19e9129bd510f2350000000000131bf8 XMM07=fb795ef6d65770560000000000121bd8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ff45000 RCX=0000000000000000 RDX=ffff888018d31b40 RSI=ffffffff83867eee RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016d1f9b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000009fb000009fb R12=00000000000000a4 R13=ffff888019711140 R14=ffff888016d1fa88 R15=00000000000000a4 RIP=ffffffff814c0864 RFL=00000293 [--S-A-C] 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 00007fadc043a900 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=00007ffcb7729000 CR3=000000000c958000 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