syzkaller login: [ 30.631600] BUG: Bad rss-counter state mm:00000000a920a27d type:MM_FILEPAGES val:33 [ 30.633004] BUG: Bad rss-counter state mm:00000000a920a27d type:MM_ANONPAGES val:22 [ 30.778973] ================================================================== [ 30.780095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.781412] Read of size 8 at addr ffff88800d999ed8 by task sshd/221 [ 30.782314] [ 30.782536] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.783439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.784435] Call Trace: [ 30.784756] [ 30.785039] dump_stack_lvl+0x91/0xf0 [ 30.785564] print_report+0xcc/0x620 [ 30.786050] ? __virt_addr_valid+0x102/0x340 [ 30.786617] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787248] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.787866] kasan_report+0xbe/0xf0 [ 30.788373] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.788990] vma_interval_tree_remove+0xc75/0xec0 [ 30.789618] vma_prepare+0xc54/0x11a0 [ 30.790112] __split_vma+0x5af/0x950 [ 30.790594] ? __pfx___split_vma+0x10/0x10 [ 30.791140] ? find_held_lock+0x2c/0x110 [ 30.791816] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.792540] ? lock_is_held_type+0x9f/0x120 [ 30.793231] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.794053] ? mtree_range_walk+0x632/0x900 [ 30.794746] ? mas_walk+0x5c7/0x7c0 [ 30.795276] do_vmi_munmap+0x1f1/0x2b0 [ 30.795771] mmap_region+0x1f9/0x2660 [ 30.796283] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.796795] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.797600] ? __pfx_lock_acquire+0x10/0x10 [ 30.798170] ? __pfx_mmap_region+0x10/0x10 [ 30.798712] ? security_mmap_addr+0x7d/0xa0 [ 30.799265] ? get_unmapped_area+0x1f5/0x3f0 [ 30.799816] do_mmap+0x854/0xf00 [ 30.800255] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.800749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.801327] ksys_mmap_pgoff+0x3af/0x500 [ 30.801837] do_syscall_64+0x3f/0x90 [ 30.802315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802960] RIP: 0033:0x7f54625bfd82 [ 30.803453] 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 [ 30.805605] RSP: 002b:00007ffdd95d9a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.806508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54625bfd82 [ 30.807380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54619f9000 [ 30.808222] RBP: 00007f54619f9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.809070] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec0262bf70 [ 30.809924] R13: 00007ffdd95d9a70 R14: 00007ffdd95d9aa0 R15: 00007ffdd95d9e00 [ 30.810784] [ 30.811087] [ 30.811324] Allocated by task 214: [ 30.811752] kasan_save_stack+0x22/0x50 [ 30.812254] kasan_set_track+0x25/0x30 [ 30.812753] __kasan_slab_alloc+0x59/0x70 [ 30.813293] kmem_cache_alloc+0x16b/0x370 [ 30.813812] vm_area_dup+0x20/0x160 [ 30.814297] __split_vma+0x170/0x950 [ 30.814771] split_vma+0xc6/0x110 [ 30.815241] mprotect_fixup+0x8d2/0xb30 [ 30.815744] do_mprotect_pkey+0x87e/0xd40 [ 30.816284] __x64_sys_mprotect+0x78/0xc0 [ 30.816809] do_syscall_64+0x3f/0x90 [ 30.817300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817946] [ 30.818172] Freed by task 214: [ 30.818568] kasan_save_stack+0x22/0x50 [ 30.819085] kasan_set_track+0x25/0x30 [ 30.819597] kasan_save_free_info+0x2b/0x50 [ 30.820144] __kasan_slab_free+0x10a/0x190 [ 30.820680] kmem_cache_free+0x10d/0x4d0 [ 30.821207] rcu_core+0x8c8/0x2860 [ 30.821664] __do_softirq+0x1b7/0x7d4 [ 30.822223] [ 30.822440] Last potentially related work creation: [ 30.823030] kasan_save_stack+0x22/0x50 [ 30.823575] __kasan_record_aux_stack+0x8e/0xa0 [ 30.824165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.824814] remove_vma+0x139/0x170 [ 30.825300] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.825867] do_vmi_munmap+0x1f1/0x2b0 [ 30.826365] __vm_munmap+0x138/0x3a0 [ 30.826833] __x64_sys_munmap+0x59/0x80 [ 30.827350] do_syscall_64+0x3f/0x90 [ 30.827822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.828476] [ 30.828692] The buggy address belongs to the object at ffff88800d999e80 [ 30.828692] which belongs to the cache vm_area_struct of size 168 [ 30.830194] The buggy address is located 88 bytes inside of [ 30.830194] freed 168-byte region [ffff88800d999e80, ffff88800d999f28) [ 30.831628] [ 30.831847] The buggy address belongs to the physical page: [ 30.832520] page:0000000012779756 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd999 [ 30.833637] memcg:ffff8880098a5101 [ 30.834076] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.834724] page_type: 0xffffffff() [ 30.835199] raw: 0100000000000200 ffff88800879fc80 ffffea0000595240 dead000000000008 [ 30.836136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098a5101 [ 30.837051] page dumped because: kasan: bad access detected [ 30.837734] [ 30.837949] Memory state around the buggy address: [ 30.838541] ffff88800d999d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.839412] ffff88800d999e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.840279] >ffff88800d999e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.841158] ^ [ 30.841903] ffff88800d999f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.842769] ffff88800d999f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.843645] ================================================================== [ 30.844596] Disabling lock debugging due to kernel taint [ 32.261143] BUG: Bad rss-counter state mm:00000000e38e8698 type:MM_FILEPAGES val:33 [ 32.262192] BUG: Bad rss-counter state mm:00000000e38e8698 type:MM_ANONPAGES val:22 [ 32.770746] BUG: Bad rss-counter state mm:0000000071bb12a6 type:MM_FILEPAGES val:33 [ 32.772036] BUG: Bad rss-counter state mm:0000000071bb12a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14657' (ECDSA) to the list of known hosts. 2023/06/19 20:01:57 fuzzer started 2023/06/19 20:01:57 dialing manager at localhost:44161 2023/06/19 20:01:57 checking machine... 2023/06/19 20:01:57 checking revisions... [ 33.524018] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:01:57 testing simple program... [ 33.574690] cgroup: Unknown subsys name 'net' [ 33.637376] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:01:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000002 RCX=ffffffff8207beda RDX=ffff888015911b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000004 RSP=ffff88800eeb7d40 R8 =0000000000000005 R9 =0000000000000006 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffff R13=00007fb2c0032270 R14=1ffff11001dd6fb2 R15=ffff88800eeb7ec8 RIP=ffffffff814c07eb RFL=00000297 [--S-APC] 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 00007fb2cae8a700 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=00007fd4e6e4e0b0 CR3=00000000164de000 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=2037353a31303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a31303a3032203931 XMM08=3d656e696c646d632022656369767265 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=00007fce62114000 CR3=0000000010174000 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=fcbd3d4da558cb84634d71f1a38aa94f XMM02=000000000011c950ec2efd57dc4c00df XMM03=0000000000123df0bc7934224596e95e XMM04=9ee617cc3ee27b1b00000000000ae988 XMM05=22ddbc3a7f189d1d00000000001347e0 XMM06=c291bd5c70af25b90000000000133880 XMM07=e042d86d42eb936e0000000000124070 XMM08=bc7934224596e95e000000000011c9b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000