syzkaller login: [ 40.291321] BUG: Bad rss-counter state mm:00000000776f33f6 type:MM_FILEPAGES val:33 [ 40.292513] BUG: Bad rss-counter state mm:00000000776f33f6 type:MM_ANONPAGES val:22 [ 40.326920] ================================================================== [ 40.328020] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.329057] Read of size 8 at addr ffff88800cbf9a50 by task sshd/219 [ 40.329912] [ 40.330137] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.331226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.332545] Call Trace: [ 40.333002] [ 40.333341] dump_stack_lvl+0x91/0xf0 [ 40.333978] print_report+0xcc/0x620 [ 40.334588] ? __virt_addr_valid+0x102/0x340 [ 40.335322] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.336107] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.336877] kasan_report+0xbe/0xf0 [ 40.337462] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.338223] vma_interval_tree_remove+0xc75/0xec0 [ 40.339169] vma_prepare+0xc54/0x11a0 [ 40.339759] __split_vma+0x5af/0x950 [ 40.340468] ? __pfx___split_vma+0x10/0x10 [ 40.341175] ? find_held_lock+0x2c/0x110 [ 40.341821] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.342482] ? lock_is_held_type+0x9f/0x120 [ 40.343091] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.343817] ? mtree_range_walk+0x632/0x900 [ 40.344385] ? mas_walk+0x5c7/0x7c0 [ 40.344863] do_vmi_munmap+0x1f1/0x2b0 [ 40.345368] mmap_region+0x1f9/0x2660 [ 40.345856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.346382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.347121] ? __pfx_lock_acquire+0x10/0x10 [ 40.347672] ? __pfx_mmap_region+0x10/0x10 [ 40.348208] ? security_mmap_addr+0x7d/0xa0 [ 40.348746] ? get_unmapped_area+0x1f5/0x3f0 [ 40.349305] do_mmap+0x854/0xf00 [ 40.349751] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.350258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.350848] ksys_mmap_pgoff+0x3af/0x500 [ 40.351368] do_syscall_64+0x3f/0x90 [ 40.351854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.352505] RIP: 0033:0x7f9371dc8d82 [ 40.352978] 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 [ 40.355326] RSP: 002b:00007ffda3ef91e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.356267] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9371dc8d82 [ 40.357140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9371202000 [ 40.357999] RBP: 00007f9371202000 R08: 0000000000000009 R09: 0000000000001000 [ 40.358872] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635b8df2ec0 [ 40.359728] R13: 00007ffda3ef9200 R14: 00007ffda3ef9230 R15: 00007ffda3ef9590 [ 40.360623] [ 40.360935] [ 40.361162] Allocated by task 212: [ 40.361610] kasan_save_stack+0x22/0x50 [ 40.362149] kasan_set_track+0x25/0x30 [ 40.362660] __kasan_slab_alloc+0x59/0x70 [ 40.363205] kmem_cache_alloc+0x16b/0x370 [ 40.363745] vm_area_dup+0x20/0x160 [ 40.364218] __split_vma+0x170/0x950 [ 40.364710] split_vma+0xc6/0x110 [ 40.365165] mprotect_fixup+0x8d2/0xb30 [ 40.365676] do_mprotect_pkey+0x87e/0xd40 [ 40.366220] __x64_sys_mprotect+0x78/0xc0 [ 40.366780] do_syscall_64+0x3f/0x90 [ 40.367276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.367928] [ 40.368151] Freed by task 212: [ 40.368566] kasan_save_stack+0x22/0x50 [ 40.369089] kasan_set_track+0x25/0x30 [ 40.369599] kasan_save_free_info+0x2b/0x50 [ 40.370150] __kasan_slab_free+0x10a/0x190 [ 40.370720] kmem_cache_free+0x10d/0x4d0 [ 40.371245] rcu_core+0x8c8/0x2860 [ 40.371731] __do_softirq+0x1b7/0x7d4 [ 40.372218] [ 40.372440] Last potentially related work creation: [ 40.373034] kasan_save_stack+0x22/0x50 [ 40.373551] __kasan_record_aux_stack+0x8e/0xa0 [ 40.374145] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.374821] remove_vma+0x139/0x170 [ 40.375279] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.375839] do_vmi_munmap+0x1f1/0x2b0 [ 40.376330] __vm_munmap+0x138/0x3a0 [ 40.376817] __x64_sys_munmap+0x59/0x80 [ 40.377329] do_syscall_64+0x3f/0x90 [ 40.377821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.378479] [ 40.378703] The buggy address belongs to the object at ffff88800cbf99f8 [ 40.378703] which belongs to the cache vm_area_struct of size 168 [ 40.380238] The buggy address is located 88 bytes inside of [ 40.380238] freed 168-byte region [ffff88800cbf99f8, ffff88800cbf9aa0) [ 40.381639] [ 40.381859] The buggy address belongs to the physical page: [ 40.382539] page:0000000092f742e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbf9 [ 40.383640] memcg:ffff88800c685501 [ 40.384068] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.384720] page_type: 0xffffffff() [ 40.385179] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 40.386112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c685501 [ 40.387054] page dumped because: kasan: bad access detected [ 40.387727] [ 40.387951] Memory state around the buggy address: [ 40.388538] ffff88800cbf9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.389408] ffff88800cbf9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 40.390285] >ffff88800cbf9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.391169] ^ [ 40.391887] ffff88800cbf9a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 40.392756] ffff88800cbf9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.393615] ================================================================== [ 40.394748] Disabling lock debugging due to kernel taint [ 42.262486] BUG: Bad rss-counter state mm:000000006eed14ab type:MM_FILEPAGES val:33 [ 42.263428] BUG: Bad rss-counter state mm:000000006eed14ab type:MM_ANONPAGES val:22 [ 42.778066] BUG: Bad rss-counter state mm:00000000039dd3ef type:MM_FILEPAGES val:33 [ 42.779292] BUG: Bad rss-counter state mm:00000000039dd3ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2811' (ECDSA) to the list of known hosts. 2023/06/19 13:59:07 fuzzer started 2023/06/19 13:59:08 dialing manager at localhost:44161 2023/06/19 13:59:08 checking machine... 2023/06/19 13:59:08 checking revisions... [ 43.482098] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:59:08 testing simple program... [ 43.523114] cgroup: Unknown subsys name 'net' [ 43.612908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:59:06 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffffffff0ba7794 RSI=ffffea00003cb100 RDI=ffffffff85d3bca0 RBP=ffffea00003cb140 RSP=ffff888008d7fb20 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea00003cb170 R11=000000000000f2c5 R12=0000000000000000 R13=ffffea00003cb100 R14=000000000000f2c4 R15=ffff88807ffdc500 RIP=ffffffff817895c4 RFL=00000046 [---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 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=00007ffccd265f38 CR3=0000000005482000 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=00007f69465435100000557b3a686790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bcb899 RBX=ffffffff85e5c4c8 RCX=ffffffff81eeeaf7 RDX=0000000000000000 RSI=ffffffff861c6cf8 RDI=ffffffff85e5c49c RBP=ffffffff85e5c4c8 RSP=ffff888010297998 R8 =ffffffff861c6cf8 R9 =ffff888010297ac0 R10=0000000000038001 R11=0000000000038c32 R12=ffffffff85e5c4c8 R13=ffffffff85e5c49c R14=ffffffff85e5c4c4 R15=dffffc0000000000 RIP=ffffffff84601430 RFL=00000016 [----AP-] 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 00007fafbec97900 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=00007ffc32006000 CR3=000000000f30e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000