syzkaller login: [ 30.106031] BUG: Bad rss-counter state mm:000000006b01cbf8 type:MM_FILEPAGES val:33 [ 30.107462] BUG: Bad rss-counter state mm:000000006b01cbf8 type:MM_ANONPAGES val:22 [ 30.272429] ================================================================== [ 30.273517] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.274642] Read of size 8 at addr ffff888018745140 by task sshd/220 [ 30.275610] [ 30.275818] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.276639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.277577] Call Trace: [ 30.277884] [ 30.278163] dump_stack_lvl+0x91/0xf0 [ 30.278636] print_report+0xcc/0x620 [ 30.279102] ? __virt_addr_valid+0x102/0x340 [ 30.279637] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.280238] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.280827] kasan_report+0xbe/0xf0 [ 30.281288] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.281882] vma_interval_tree_remove+0xc75/0xec0 [ 30.282465] vma_prepare+0xc54/0x11a0 [ 30.282930] __split_vma+0x5af/0x950 [ 30.283397] ? __pfx___split_vma+0x10/0x10 [ 30.283973] ? find_held_lock+0x2c/0x110 [ 30.284498] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.285065] ? lock_is_held_type+0x9f/0x120 [ 30.285616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.286237] ? mtree_range_walk+0x632/0x900 [ 30.286794] ? mas_walk+0x5c7/0x7c0 [ 30.287278] do_vmi_munmap+0x1f1/0x2b0 [ 30.287781] mmap_region+0x1f9/0x2660 [ 30.288296] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.288810] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.289532] ? __pfx_lock_acquire+0x10/0x10 [ 30.290067] ? __pfx_mmap_region+0x10/0x10 [ 30.290615] ? security_mmap_addr+0x7d/0xa0 [ 30.291147] ? get_unmapped_area+0x1f5/0x3f0 [ 30.291708] do_mmap+0x854/0xf00 [ 30.292175] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.292681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.293246] ksys_mmap_pgoff+0x3af/0x500 [ 30.293752] do_syscall_64+0x3f/0x90 [ 30.294246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.294879] RIP: 0033:0x7fe2960f4d82 [ 30.295341] 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 [ 30.297500] RSP: 002b:00007ffe032fef48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.298414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2960f4d82 [ 30.299271] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe29552e000 [ 30.300139] RBP: 00007fe29552e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.300975] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be1f311f60 [ 30.301827] R13: 00007ffe032fef60 R14: 00007ffe032fef90 R15: 00007ffe032ff2f0 [ 30.302688] [ 30.302975] [ 30.303203] Allocated by task 213: [ 30.303634] kasan_save_stack+0x22/0x50 [ 30.304169] kasan_set_track+0x25/0x30 [ 30.304677] __kasan_slab_alloc+0x59/0x70 [ 30.305205] kmem_cache_alloc+0x16b/0x370 [ 30.305726] vm_area_dup+0x20/0x160 [ 30.306188] __split_vma+0x170/0x950 [ 30.306656] split_vma+0xc6/0x110 [ 30.307101] mprotect_fixup+0x8d2/0xb30 [ 30.307614] do_mprotect_pkey+0x87e/0xd40 [ 30.308162] __x64_sys_mprotect+0x78/0xc0 [ 30.308695] do_syscall_64+0x3f/0x90 [ 30.309185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.309824] [ 30.310046] Freed by task 213: [ 30.310444] kasan_save_stack+0x22/0x50 [ 30.310952] kasan_set_track+0x25/0x30 [ 30.311442] kasan_save_free_info+0x2b/0x50 [ 30.311997] __kasan_slab_free+0x10a/0x190 [ 30.312547] kmem_cache_free+0x10d/0x4d0 [ 30.313046] rcu_core+0x8c8/0x2860 [ 30.313485] __do_softirq+0x1b7/0x7d4 [ 30.313960] [ 30.314180] Last potentially related work creation: [ 30.314771] kasan_save_stack+0x22/0x50 [ 30.315272] __kasan_record_aux_stack+0x8e/0xa0 [ 30.315859] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.316592] remove_vma+0x139/0x170 [ 30.317033] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.317609] do_vmi_munmap+0x1f1/0x2b0 [ 30.318094] __vm_munmap+0x138/0x3a0 [ 30.318569] __x64_sys_munmap+0x59/0x80 [ 30.319075] do_syscall_64+0x3f/0x90 [ 30.319560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.320238] [ 30.320466] The buggy address belongs to the object at ffff8880187450e8 [ 30.320466] which belongs to the cache vm_area_struct of size 168 [ 30.321945] The buggy address is located 88 bytes inside of [ 30.321945] freed 168-byte region [ffff8880187450e8, ffff888018745190) [ 30.323355] [ 30.323588] The buggy address belongs to the physical page: [ 30.324264] page:00000000ff35065b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18745 [ 30.325361] memcg:ffff888017349e01 [ 30.325787] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.326429] page_type: 0xffffffff() [ 30.326888] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.327811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017349e01 [ 30.328737] page dumped because: kasan: bad access detected [ 30.329407] [ 30.329621] Memory state around the buggy address: [ 30.330201] ffff888018745000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.331053] ffff888018745080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.331883] >ffff888018745100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.332766] ^ [ 30.333403] ffff888018745180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.334275] ffff888018745200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.335116] ================================================================== [ 30.336062] Disabling lock debugging due to kernel taint [ 32.500269] BUG: Bad rss-counter state mm:000000002914cfdc type:MM_FILEPAGES val:33 [ 32.501275] BUG: Bad rss-counter state mm:000000002914cfdc type:MM_ANONPAGES val:22 [ 32.994265] BUG: Bad rss-counter state mm:000000005c9380b1 type:MM_FILEPAGES val:33 [ 32.995289] BUG: Bad rss-counter state mm:000000005c9380b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22172' (ECDSA) to the list of known hosts. 2023/06/20 19:22:54 fuzzer started 2023/06/20 19:22:54 dialing manager at localhost:36067 2023/06/20 19:22:54 checking machine... 2023/06/20 19:22:54 checking revisions... [ 33.754594] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:22:54 testing simple program... [ 33.809013] cgroup: Unknown subsys name 'net' [ 33.865185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:22:54 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=0000000000000000 RCX=0000000000000001 RDX=1ffffd400007f116 RSI=ffffea00003f8800 RDI=ffffea00003f88b0 RBP=ffffea00003f8880 RSP=ffff88800fd7f550 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea00003f8870 R11=000000000000fe21 R12=0000000000000001 R13=ffffea00003f8800 R14=ffffea00003f8800 R15=ffff88807ffdc500 RIP=ffffffff81789ced 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 00007fa8f51ae900 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=0000560005506768 CR3=000000000e0f0000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015c472c0 RCX=0000000000000001 RDX=1ffff11002b88e6e RSI=ffffffff818d554e RDI=ffff888015c472cc RBP=ffff888015c47370 RSP=ffff888015c471d8 R8 =0000000000000001 R9 =ffff888015c47238 R10=0000000000038001 R11=00000000000240a6 R12=ffff888015c472c0 R13=0000000000000000 R14=ffff888015c48000 R15=0000000000092cc0 RIP=ffffffff813ad543 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 00007fabf0deb900 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=00007fabf024d020 CR3=000000000c7d2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6551850b3f9fc0f400000000000ae988 XMM05=c0224dc0281e3b9100000000001326f0 XMM06=4fda316b135da52b0000000000131170 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000