syzkaller login: [ 47.291967] BUG: Bad rss-counter state mm:00000000d81e35ae type:MM_FILEPAGES val:33 [ 47.293168] BUG: Bad rss-counter state mm:00000000d81e35ae type:MM_ANONPAGES val:22 [ 47.334062] ================================================================== [ 47.334989] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.335927] Read of size 8 at addr ffff88800e4d4058 by task sshd/220 [ 47.336885] [ 47.337108] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.338011] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.339140] Call Trace: [ 47.339495] [ 47.339814] dump_stack_lvl+0x91/0xf0 [ 47.340358] print_report+0xcc/0x620 [ 47.340889] ? __virt_addr_valid+0x102/0x340 [ 47.341492] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.342166] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.342857] kasan_report+0xbe/0xf0 [ 47.343382] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.344076] vma_interval_tree_remove+0xc75/0xec0 [ 47.344747] vma_prepare+0xc54/0x11a0 [ 47.345279] __split_vma+0x5af/0x950 [ 47.345802] ? __pfx___split_vma+0x10/0x10 [ 47.346393] ? find_held_lock+0x2c/0x110 [ 47.346974] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.347602] ? lock_is_held_type+0x9f/0x120 [ 47.348196] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.348870] ? mtree_range_walk+0x632/0x900 [ 47.349480] ? mas_walk+0x5c7/0x7c0 [ 47.350002] do_vmi_munmap+0x1f1/0x2b0 [ 47.350547] mmap_region+0x1f9/0x2660 [ 47.351104] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.351672] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.352460] ? __pfx_lock_acquire+0x10/0x10 [ 47.353043] ? __pfx_mmap_region+0x10/0x10 [ 47.353634] ? security_mmap_addr+0x7d/0xa0 [ 47.354216] ? get_unmapped_area+0x1f5/0x3f0 [ 47.354835] do_mmap+0x854/0xf00 [ 47.355321] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.355881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.356507] ksys_mmap_pgoff+0x3af/0x500 [ 47.357070] do_syscall_64+0x3f/0x90 [ 47.357606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.358322] RIP: 0033:0x7f0b34439d82 [ 47.358858] 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 [ 47.361216] RSP: 002b:00007ffd5170ca48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.362316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b34439d82 [ 47.363579] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b33873000 [ 47.364839] RBP: 00007f0b33873000 R08: 0000000000000009 R09: 0000000000001000 [ 47.366109] R10: 0000000000000812 R11: 0000000000000206 R12: 000055df95d81ec0 [ 47.367395] R13: 00007ffd5170ca60 R14: 00007ffd5170ca90 R15: 00007ffd5170cdf0 [ 47.368720] [ 47.369172] [ 47.369502] Allocated by task 213: [ 47.370171] kasan_save_stack+0x22/0x50 [ 47.370949] kasan_set_track+0x25/0x30 [ 47.371704] __kasan_slab_alloc+0x59/0x70 [ 47.372490] kmem_cache_alloc+0x16b/0x370 [ 47.373270] vm_area_dup+0x20/0x160 [ 47.373953] __split_vma+0x170/0x950 [ 47.374689] split_vma+0xc6/0x110 [ 47.375351] mprotect_fixup+0x8d2/0xb30 [ 47.376052] do_mprotect_pkey+0x87e/0xd40 [ 47.376750] __x64_sys_mprotect+0x78/0xc0 [ 47.377441] do_syscall_64+0x3f/0x90 [ 47.378186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.379032] [ 47.379315] Freed by task 213: [ 47.379831] kasan_save_stack+0x22/0x50 [ 47.380479] kasan_set_track+0x25/0x30 [ 47.381157] kasan_save_free_info+0x2b/0x50 [ 47.381878] __kasan_slab_free+0x10a/0x190 [ 47.382629] kmem_cache_free+0x10d/0x4d0 [ 47.383311] rcu_core+0x8c8/0x2860 [ 47.383898] __do_softirq+0x1b7/0x7d4 [ 47.384522] [ 47.384818] Last potentially related work creation: [ 47.385603] kasan_save_stack+0x22/0x50 [ 47.386278] __kasan_record_aux_stack+0x8e/0xa0 [ 47.387054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.387926] remove_vma+0x139/0x170 [ 47.388545] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.389301] do_vmi_munmap+0x1f1/0x2b0 [ 47.389954] __vm_munmap+0x138/0x3a0 [ 47.390583] __x64_sys_munmap+0x59/0x80 [ 47.391288] do_syscall_64+0x3f/0x90 [ 47.391922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.392783] [ 47.393076] The buggy address belongs to the object at ffff88800e4d4000 [ 47.393076] which belongs to the cache vm_area_struct of size 168 [ 47.395057] The buggy address is located 88 bytes inside of [ 47.395057] freed 168-byte region [ffff88800e4d4000, ffff88800e4d40a8) [ 47.396942] [ 47.397236] The buggy address belongs to the physical page: [ 47.398131] page:000000003c58ae92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4d4 [ 47.399353] memcg:ffff888015b83f01 [ 47.399787] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.400426] page_type: 0xffffffff() [ 47.400874] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 47.401788] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b83f01 [ 47.402703] page dumped because: kasan: bad access detected [ 47.403363] [ 47.403576] Memory state around the buggy address: [ 47.404153] ffff88800e4d3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.404999] ffff88800e4d3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.405846] >ffff88800e4d4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.406687] ^ [ 47.407451] ffff88800e4d4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 47.408300] ffff88800e4d4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.409150] ================================================================== [ 47.410156] Disabling lock debugging due to kernel taint [ 49.479122] BUG: Bad rss-counter state mm:00000000778e99e4 type:MM_FILEPAGES val:33 [ 49.480302] BUG: Bad rss-counter state mm:00000000778e99e4 type:MM_ANONPAGES val:22 [ 49.913265] BUG: Bad rss-counter state mm:00000000d3c829d8 type:MM_FILEPAGES val:33 [ 49.914404] BUG: Bad rss-counter state mm:00000000d3c829d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57238' (ECDSA) to the list of known hosts. 2023/06/19 18:59:31 fuzzer started 2023/06/19 18:59:31 dialing manager at localhost:44161 2023/06/19 18:59:31 checking machine... 2023/06/19 18:59:31 checking revisions... [ 50.591427] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:59:31 testing simple program... [ 50.639849] cgroup: Unknown subsys name 'net' [ 50.718881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:59:14 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888015a57b68 RCX=ffffffff818bed83 RDX=ffffed1002b4af72 RSI=0000000000000004 RDI=ffff888015a57b88 RBP=ffff888015a57b88 RSP=ffff888015a57928 R8 =0000000000000001 R9 =ffffed1002b4af71 R10=ffff888015a57b8b R11=0000000000000000 R12=00000000fffffffc R13=ffff88800fa451c0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff818bed88 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 00007f4bd17fc700 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=00007fff798e2000 CR3=000000000e26a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007fd013194100 CR3=000000000c5ea000 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=5f1395542072ebb7914453aeddc18e88 XMM02=000000000011ce08ec2efd57dc4c00df XMM03=0000000000124750eadb6c8156655249 XMM04=e699a7181acc700c00000000000ae988 XMM05=19e9129bd510f2350000000000134250 XMM06=5fbd36faf715060500000000001330b8 XMM07=e042d86d42eb936e00000000001249d0 XMM08=eadb6c8156655249000000000011ce68 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000