syzkaller login: [ 32.910391] BUG: Bad rss-counter state mm:00000000c4fe7773 type:MM_FILEPAGES val:33 [ 32.911451] BUG: Bad rss-counter state mm:00000000c4fe7773 type:MM_ANONPAGES val:22 [ 32.951964] ================================================================== [ 32.952973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.954070] Read of size 8 at addr ffff88801655c4e0 by task sshd/221 [ 32.954949] [ 32.955175] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.956129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.957253] Call Trace: [ 32.957585] [ 32.957880] dump_stack_lvl+0x91/0xf0 [ 32.958393] print_report+0xcc/0x620 [ 32.958912] ? __virt_addr_valid+0x102/0x340 [ 32.959487] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.960126] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.960765] kasan_report+0xbe/0xf0 [ 32.961254] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.961894] vma_interval_tree_remove+0xc75/0xec0 [ 32.962537] vma_prepare+0xc54/0x11a0 [ 32.963043] __split_vma+0x5af/0x950 [ 32.963535] ? __pfx___split_vma+0x10/0x10 [ 32.964082] ? find_held_lock+0x2c/0x110 [ 32.964622] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.965199] ? lock_is_held_type+0x9f/0x120 [ 32.965755] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.966369] ? mtree_range_walk+0x632/0x900 [ 32.966939] ? mas_walk+0x5c7/0x7c0 [ 32.967427] do_vmi_munmap+0x1f1/0x2b0 [ 32.967940] mmap_region+0x1f9/0x2660 [ 32.968439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.968967] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.969705] ? __pfx_lock_acquire+0x10/0x10 [ 32.970253] ? __pfx_mmap_region+0x10/0x10 [ 32.970814] ? security_mmap_addr+0x7d/0xa0 [ 32.971377] ? get_unmapped_area+0x1f5/0x3f0 [ 32.971953] do_mmap+0x854/0xf00 [ 32.972411] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.972921] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.973499] ksys_mmap_pgoff+0x3af/0x500 [ 32.974023] do_syscall_64+0x3f/0x90 [ 32.974534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.975196] RIP: 0033:0x7fc267242d82 [ 32.975664] 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 [ 32.977898] RSP: 002b:00007ffcc4c1e778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.978879] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc267242d82 [ 32.979797] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc26667c000 [ 32.980712] RBP: 00007fc26667c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.981631] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559467a39ec0 [ 32.982559] R13: 00007ffcc4c1e790 R14: 00007ffcc4c1e7c0 R15: 00007ffcc4c1eb20 [ 32.983483] [ 32.983804] [ 32.984035] Allocated by task 214: [ 32.984499] kasan_save_stack+0x22/0x50 [ 32.985041] kasan_set_track+0x25/0x30 [ 32.985575] __kasan_slab_alloc+0x59/0x70 [ 32.986139] kmem_cache_alloc+0x16b/0x370 [ 32.986711] vm_area_dup+0x20/0x160 [ 32.987203] __split_vma+0x170/0x950 [ 32.987702] split_vma+0xc6/0x110 [ 32.988179] mprotect_fixup+0x8d2/0xb30 [ 32.988716] do_mprotect_pkey+0x87e/0xd40 [ 32.989276] __x64_sys_mprotect+0x78/0xc0 [ 32.989831] do_syscall_64+0x3f/0x90 [ 32.990342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.991035] [ 32.991269] Freed by task 214: [ 32.991692] kasan_save_stack+0x22/0x50 [ 32.992223] kasan_set_track+0x25/0x30 [ 32.992752] kasan_save_free_info+0x2b/0x50 [ 32.993323] __kasan_slab_free+0x10a/0x190 [ 32.993891] kmem_cache_free+0x10d/0x4d0 [ 32.994435] rcu_core+0x8c8/0x2860 [ 32.994926] __do_softirq+0x1b7/0x7d4 [ 32.995434] [ 32.995666] Last potentially related work creation: [ 32.996299] kasan_save_stack+0x22/0x50 [ 32.996839] __kasan_record_aux_stack+0x8e/0xa0 [ 32.997494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.998170] remove_vma+0x139/0x170 [ 32.998657] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.999253] do_vmi_munmap+0x1f1/0x2b0 [ 32.999768] __vm_munmap+0x138/0x3a0 [ 33.000264] __x64_sys_munmap+0x59/0x80 [ 33.000796] do_syscall_64+0x3f/0x90 [ 33.001292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.001974] [ 33.002204] The buggy address belongs to the object at ffff88801655c488 [ 33.002204] which belongs to the cache vm_area_struct of size 168 [ 33.003776] The buggy address is located 88 bytes inside of [ 33.003776] freed 168-byte region [ffff88801655c488, ffff88801655c530) [ 33.005249] [ 33.005472] The buggy address belongs to the physical page: [ 33.006167] page:000000002fb20834 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1655c [ 33.007324] memcg:ffff888014724e01 [ 33.007785] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.008474] page_type: 0xffffffff() [ 33.008949] raw: 0100000000000200 ffff88800879fc80 ffffea00005b26c0 dead000000000008 [ 33.009925] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014724e01 [ 33.010848] page dumped because: kasan: bad access detected [ 33.011504] [ 33.011717] Memory state around the buggy address: [ 33.012292] ffff88801655c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.013151] ffff88801655c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.013999] >ffff88801655c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.014871] ^ [ 33.015632] ffff88801655c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 33.016480] ffff88801655c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.017345] ================================================================== [ 33.018579] Disabling lock debugging due to kernel taint [ 35.061077] BUG: Bad rss-counter state mm:00000000f718586a type:MM_FILEPAGES val:33 [ 35.062133] BUG: Bad rss-counter state mm:00000000f718586a type:MM_ANONPAGES val:22 [ 35.524712] BUG: Bad rss-counter state mm:00000000f4b23649 type:MM_FILEPAGES val:33 [ 35.525708] BUG: Bad rss-counter state mm:00000000f4b23649 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5018' (ECDSA) to the list of known hosts. 2023/06/19 17:23:48 fuzzer started 2023/06/19 17:23:48 dialing manager at localhost:44161 2023/06/19 17:23:48 checking machine... 2023/06/19 17:23:48 checking revisions... [ 36.217899] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:23:48 testing simple program... [ 36.272169] cgroup: Unknown subsys name 'net' [ 36.328592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:23:46 Registers: info registers vcpu 0 RAX=1ffff110011affb5 RBX=000000000003a2c0 RCX=ffffffff84531e74 RDX=dffffc0000000000 RSI=dffffc0000000000 RDI=ffffffff8540a108 RBP=ffffffff8540a108 RSP=ffff888008d7fd48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff81377a22 RFL=00000212 [----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 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=00007fc44e1400b0 CR3=000000001be96000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ff132ba76f0 CR3=000000000c5e8000 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=782f6abdc53503aaa642087030d30847 XMM02=2c67c8bc2e329bc3000000000011cfe8 XMM03=fb795ef6d65770560000000000124488 XMM04=2135ab2958fe499700000000000ae988 XMM05=e4cb8bb95a7664b60000000000134028 XMM06=daa861bf009b76e30000000000132e90 XMM07=e042d86d42eb936e0000000000124708 XMM08=bffe234326dbcecc000000000011d048 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000