syzkaller login: [ 32.097300] BUG: Bad rss-counter state mm:000000002fdce4e1 type:MM_FILEPAGES val:33 [ 32.098284] BUG: Bad rss-counter state mm:000000002fdce4e1 type:MM_ANONPAGES val:22 [ 32.268744] ================================================================== [ 32.269827] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.271039] Read of size 8 at addr ffff888014620c20 by task sshd/222 [ 32.271846] [ 32.272081] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.272982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.274012] Call Trace: [ 32.274346] [ 32.274648] dump_stack_lvl+0x91/0xf0 [ 32.275164] print_report+0xcc/0x620 [ 32.275670] ? __virt_addr_valid+0x102/0x340 [ 32.276256] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.276908] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.277556] kasan_report+0xbe/0xf0 [ 32.278068] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.278738] vma_interval_tree_remove+0xc75/0xec0 [ 32.279389] vma_prepare+0xc54/0x11a0 [ 32.279912] __split_vma+0x5af/0x950 [ 32.280427] ? __pfx___split_vma+0x10/0x10 [ 32.280996] ? find_held_lock+0x2c/0x110 [ 32.281565] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.282199] ? lock_is_held_type+0x9f/0x120 [ 32.282791] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.283446] ? mtree_range_walk+0x632/0x900 [ 32.284051] ? mas_walk+0x5c7/0x7c0 [ 32.284566] do_vmi_munmap+0x1f1/0x2b0 [ 32.285101] mmap_region+0x1f9/0x2660 [ 32.285628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.286198] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.286974] ? __pfx_lock_acquire+0x10/0x10 [ 32.287561] ? __pfx_mmap_region+0x10/0x10 [ 32.288140] ? security_mmap_addr+0x7d/0xa0 [ 32.288724] ? get_unmapped_area+0x1f5/0x3f0 [ 32.289326] do_mmap+0x854/0xf00 [ 32.289803] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.290362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.290976] ksys_mmap_pgoff+0x3af/0x500 [ 32.291531] do_syscall_64+0x3f/0x90 [ 32.292053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.292765] RIP: 0033:0x7f541e9d0d82 [ 32.293267] 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 [ 32.295597] RSP: 002b:00007ffc977d9788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.296589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f541e9d0d82 [ 32.297526] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f541de0a000 [ 32.298467] RBP: 00007f541de0a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.299393] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642606e1980 [ 32.300317] R13: 00007ffc977d97a0 R14: 00007ffc977d97d0 R15: 00007ffc977d9b30 [ 32.301260] [ 32.301582] [ 32.301818] Allocated by task 215: [ 32.302290] kasan_save_stack+0x22/0x50 [ 32.302838] kasan_set_track+0x25/0x30 [ 32.303375] __kasan_slab_alloc+0x59/0x70 [ 32.303947] kmem_cache_alloc+0x16b/0x370 [ 32.304512] vm_area_dup+0x20/0x160 [ 32.305009] __split_vma+0x170/0x950 [ 32.305519] split_vma+0xc6/0x110 [ 32.306017] mprotect_fixup+0x8d2/0xb30 [ 32.306574] do_mprotect_pkey+0x87e/0xd40 [ 32.307147] __x64_sys_mprotect+0x78/0xc0 [ 32.307720] do_syscall_64+0x3f/0x90 [ 32.308239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.308950] [ 32.309184] Freed by task 215: [ 32.309608] kasan_save_stack+0x22/0x50 [ 32.310185] kasan_set_track+0x25/0x30 [ 32.310725] kasan_save_free_info+0x2b/0x50 [ 32.311303] __kasan_slab_free+0x10a/0x190 [ 32.311880] kmem_cache_free+0x10d/0x4d0 [ 32.312435] rcu_core+0x8c8/0x2860 [ 32.312928] __do_softirq+0x1b7/0x7d4 [ 32.313449] [ 32.313682] Last potentially related work creation: [ 32.314339] kasan_save_stack+0x22/0x50 [ 32.314885] __kasan_record_aux_stack+0x8e/0xa0 [ 32.315511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.316209] remove_vma+0x139/0x170 [ 32.316700] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.317311] do_vmi_munmap+0x1f1/0x2b0 [ 32.317843] __vm_munmap+0x138/0x3a0 [ 32.318363] __x64_sys_munmap+0x59/0x80 [ 32.318908] do_syscall_64+0x3f/0x90 [ 32.319431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.320126] [ 32.320363] Second to last potentially related work creation: [ 32.321108] kasan_save_stack+0x22/0x50 [ 32.321657] __kasan_record_aux_stack+0x8e/0xa0 [ 32.322293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.322999] remove_vma+0x139/0x170 [ 32.323491] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.324097] do_vmi_munmap+0x1f1/0x2b0 [ 32.324626] mmap_region+0x1f9/0x2660 [ 32.325152] do_mmap+0x854/0xf00 [ 32.325624] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.326180] ksys_mmap_pgoff+0x3af/0x500 [ 32.326732] do_syscall_64+0x3f/0x90 [ 32.327248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.327955] [ 32.328189] The buggy address belongs to the object at ffff888014620bc8 [ 32.328189] which belongs to the cache vm_area_struct of size 168 [ 32.329794] The buggy address is located 88 bytes inside of [ 32.329794] freed 168-byte region [ffff888014620bc8, ffff888014620c70) [ 32.331344] [ 32.331579] The buggy address belongs to the physical page: [ 32.332298] page:0000000025bcd8d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14620 [ 32.333483] memcg:ffff888019802c01 [ 32.333959] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.334667] page_type: 0xffffffff() [ 32.335161] raw: 0100000000000200 ffff88800879fc80 ffffea00003c74c0 dead000000000008 [ 32.336167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019802c01 [ 32.337157] page dumped because: kasan: bad access detected [ 32.337884] [ 32.338128] Memory state around the buggy address: [ 32.338762] ffff888014620b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.339697] ffff888014620b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.340628] >ffff888014620c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.341559] ^ [ 32.342144] ffff888014620c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.343077] ffff888014620d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.344010] ================================================================== [ 32.345202] Disabling lock debugging due to kernel taint [ 34.220851] BUG: Bad rss-counter state mm:00000000ca8d059a type:MM_FILEPAGES val:33 [ 34.221840] BUG: Bad rss-counter state mm:00000000ca8d059a type:MM_ANONPAGES val:22 [ 34.599679] BUG: Bad rss-counter state mm:00000000c626abda type:MM_FILEPAGES val:33 [ 34.600917] BUG: Bad rss-counter state mm:00000000c626abda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17516' (ECDSA) to the list of known hosts. 2023/06/20 02:26:55 fuzzer started 2023/06/20 02:26:56 dialing manager at localhost:44161 2023/06/20 02:26:56 checking machine... 2023/06/20 02:26:56 checking revisions... [ 35.218580] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:26:56 testing simple program... [ 35.269063] cgroup: Unknown subsys name 'net' [ 35.312192] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:26:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc5ca1886c0 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=00007f7567ea95100000558923ac1790 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016388000 RSI=ffffffff83ab3fa9 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800cad7508 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000c9 R11=000009ed000009ed R12=0000000000000000 R13=00000000000000c9 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff83ab3fa9 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 00007fce3e285900 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=00007fce3e83c618 CR3=0000000016c7c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000