syzkaller login: [ 31.232842] BUG: Bad rss-counter state mm:000000005b559386 type:MM_FILEPAGES val:33 [ 31.234028] BUG: Bad rss-counter state mm:000000005b559386 type:MM_ANONPAGES val:22 [ 31.272433] ================================================================== [ 31.273464] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.274498] Read of size 8 at addr ffff88800b3ab3f8 by task sshd/220 [ 31.275390] [ 31.275757] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.276728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.277740] Call Trace: [ 31.278060] [ 31.278341] dump_stack_lvl+0x91/0xf0 [ 31.278835] print_report+0xcc/0x620 [ 31.279313] ? __virt_addr_valid+0x102/0x340 [ 31.279869] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.280479] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.281091] kasan_report+0xbe/0xf0 [ 31.281566] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282184] vma_interval_tree_remove+0xc75/0xec0 [ 31.282800] vma_prepare+0xc54/0x11a0 [ 31.283286] __split_vma+0x5af/0x950 [ 31.283764] ? __pfx___split_vma+0x10/0x10 [ 31.284287] ? find_held_lock+0x2c/0x110 [ 31.284805] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.285370] ? lock_is_held_type+0x9f/0x120 [ 31.285910] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.286518] ? mtree_range_walk+0x632/0x900 [ 31.287084] ? mas_walk+0x5c7/0x7c0 [ 31.287558] do_vmi_munmap+0x1f1/0x2b0 [ 31.288050] mmap_region+0x1f9/0x2660 [ 31.288532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.289043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.289759] ? __pfx_lock_acquire+0x10/0x10 [ 31.290286] ? __pfx_mmap_region+0x10/0x10 [ 31.290821] ? security_mmap_addr+0x7d/0xa0 [ 31.291348] ? get_unmapped_area+0x1f5/0x3f0 [ 31.291906] do_mmap+0x854/0xf00 [ 31.292345] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.292845] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.293407] ksys_mmap_pgoff+0x3af/0x500 [ 31.293914] do_syscall_64+0x3f/0x90 [ 31.294390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295052] RIP: 0033:0x7f081fcd6d82 [ 31.295514] 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 [ 31.297605] RSP: 002b:00007fff8e675668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.298502] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f081fcd6d82 [ 31.299345] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f081f110000 [ 31.300183] RBP: 00007f081f110000 R08: 0000000000000009 R09: 0000000000001000 [ 31.301018] R10: 0000000000000812 R11: 0000000000000206 R12: 000055de39001ec0 [ 31.301850] R13: 00007fff8e675680 R14: 00007fff8e6756b0 R15: 00007fff8e675a10 [ 31.302716] [ 31.303015] [ 31.303231] Allocated by task 213: [ 31.303655] kasan_save_stack+0x22/0x50 [ 31.304157] kasan_set_track+0x25/0x30 [ 31.304656] __kasan_slab_alloc+0x59/0x70 [ 31.305179] kmem_cache_alloc+0x16b/0x370 [ 31.305692] vm_area_dup+0x20/0x160 [ 31.306149] __split_vma+0x170/0x950 [ 31.306610] split_vma+0xc6/0x110 [ 31.307065] mprotect_fixup+0x8d2/0xb30 [ 31.307560] do_mprotect_pkey+0x87e/0xd40 [ 31.308081] __x64_sys_mprotect+0x78/0xc0 [ 31.308598] do_syscall_64+0x3f/0x90 [ 31.309074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.309715] [ 31.309927] Freed by task 213: [ 31.310324] kasan_save_stack+0x22/0x50 [ 31.310835] kasan_set_track+0x25/0x30 [ 31.311337] kasan_save_free_info+0x2b/0x50 [ 31.311867] __kasan_slab_free+0x10a/0x190 [ 31.312394] kmem_cache_free+0x10d/0x4d0 [ 31.312902] rcu_core+0x8c8/0x2860 [ 31.313400] __do_softirq+0x1b7/0x7d4 [ 31.313876] [ 31.314088] Last potentially related work creation: [ 31.314669] kasan_save_stack+0x22/0x50 [ 31.315190] __kasan_record_aux_stack+0x8e/0xa0 [ 31.315765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.316405] remove_vma+0x139/0x170 [ 31.316863] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.317415] do_vmi_munmap+0x1f1/0x2b0 [ 31.317904] __vm_munmap+0x138/0x3a0 [ 31.318366] __x64_sys_munmap+0x59/0x80 [ 31.318880] do_syscall_64+0x3f/0x90 [ 31.319356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319996] [ 31.320215] The buggy address belongs to the object at ffff88800b3ab3a0 [ 31.320215] which belongs to the cache vm_area_struct of size 168 [ 31.321679] The buggy address is located 88 bytes inside of [ 31.321679] freed 168-byte region [ffff88800b3ab3a0, ffff88800b3ab448) [ 31.323080] [ 31.323296] The buggy address belongs to the physical page: [ 31.323947] page:000000006cbbee61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb3ab [ 31.325024] memcg:ffff8880098a6e01 [ 31.325442] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.326082] page_type: 0xffffffff() [ 31.326535] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a6000 dead000000000008 [ 31.327463] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098a6e01 [ 31.328363] page dumped because: kasan: bad access detected [ 31.329016] [ 31.329237] Memory state around the buggy address: [ 31.329815] ffff88800b3ab280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.330666] ffff88800b3ab300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.331527] >ffff88800b3ab380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.332363] ^ [ 31.333197] ffff88800b3ab400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.334053] ffff88800b3ab480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.334899] ================================================================== [ 31.335879] Disabling lock debugging due to kernel taint [ 33.246648] BUG: Bad rss-counter state mm:00000000e3d22d22 type:MM_FILEPAGES val:33 [ 33.248160] BUG: Bad rss-counter state mm:00000000e3d22d22 type:MM_ANONPAGES val:22 [ 33.723029] BUG: Bad rss-counter state mm:00000000e4eee9f5 type:MM_FILEPAGES val:33 [ 33.724174] BUG: Bad rss-counter state mm:00000000e4eee9f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52013' (ECDSA) to the list of known hosts. 2023/06/21 01:05:22 fuzzer started 2023/06/21 01:05:22 dialing manager at localhost:36067 2023/06/21 01:05:22 checking machine... 2023/06/21 01:05:22 checking revisions... [ 34.433734] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:05:22 testing simple program... [ 34.481093] cgroup: Unknown subsys name 'net' [ 34.530519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:05:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fe2a140 RCX=ffffffff8181f414 RDX=1ffff11001fc5434 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09c48 R8 =0000000000000000 R9 =ffffed1001fc5434 R10=ffff88800fe2a1a7 R11=0000000000000000 R12=1ffff1100d9c138b R13=ffff88800fe2a1a0 R14=ffff88800fe2a1e0 R15=0000000000000000 RIP=ffffffff814c0370 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 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=00007ffcd4b5a958 CR3=000000000fc54000 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=2031323a35303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a35303a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11002d63f8a RSI=ffffffff81f31a70 RDI=ffff888016b1fc50 RBP=0000000000000000 RSP=ffff888016b1fa60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016b1fc50 R13=dffffc0000000000 R14=ffff88800f3b6008 R15=dffffc0000000000 RIP=ffffffff814c0860 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 00007f70c7502900 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=000056309e366954 CR3=000000000efb6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000