syzkaller login: [ 31.059018] BUG: Bad rss-counter state mm:00000000915f5da2 type:MM_FILEPAGES val:33 [ 31.060025] BUG: Bad rss-counter state mm:00000000915f5da2 type:MM_ANONPAGES val:22 [ 31.229477] ================================================================== [ 31.230745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.231850] Read of size 8 at addr ffff88800cbd5058 by task sshd/222 [ 31.232779] [ 31.233051] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.234066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.235224] Call Trace: [ 31.235601] [ 31.235937] dump_stack_lvl+0x91/0xf0 [ 31.236520] print_report+0xcc/0x620 [ 31.237104] ? __virt_addr_valid+0x102/0x340 [ 31.237764] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.238504] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.239244] kasan_report+0xbe/0xf0 [ 31.239827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240583] vma_interval_tree_remove+0xc75/0xec0 [ 31.241341] vma_prepare+0xc54/0x11a0 [ 31.241922] __split_vma+0x5af/0x950 [ 31.242501] ? __pfx___split_vma+0x10/0x10 [ 31.243147] ? find_held_lock+0x2c/0x110 [ 31.243780] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.244467] ? lock_is_held_type+0x9f/0x120 [ 31.245136] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.245873] ? mtree_range_walk+0x632/0x900 [ 31.246554] ? mas_walk+0x5c7/0x7c0 [ 31.247132] do_vmi_munmap+0x1f1/0x2b0 [ 31.247734] mmap_region+0x1f9/0x2660 [ 31.248328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.248961] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.249836] ? __pfx_lock_acquire+0x10/0x10 [ 31.250490] ? __pfx_mmap_region+0x10/0x10 [ 31.251145] ? security_mmap_addr+0x7d/0xa0 [ 31.251800] ? get_unmapped_area+0x1f5/0x3f0 [ 31.252475] do_mmap+0x854/0xf00 [ 31.253043] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.253645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.254337] ksys_mmap_pgoff+0x3af/0x500 [ 31.254958] do_syscall_64+0x3f/0x90 [ 31.255545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256337] RIP: 0033:0x7fecad5aed82 [ 31.256899] 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 [ 31.259527] RSP: 002b:00007ffea6965938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.260641] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fecad5aed82 [ 31.261687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fecac9e8000 [ 31.262719] RBP: 00007fecac9e8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.263758] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f20490aec0 [ 31.264795] R13: 00007ffea6965950 R14: 00007ffea6965980 R15: 00007ffea6965ce0 [ 31.265860] [ 31.266213] [ 31.266472] Allocated by task 214: [ 31.266991] kasan_save_stack+0x22/0x50 [ 31.267597] kasan_set_track+0x25/0x30 [ 31.268198] __kasan_slab_alloc+0x59/0x70 [ 31.268831] kmem_cache_alloc+0x16b/0x370 [ 31.269466] vm_area_dup+0x20/0x160 [ 31.270014] __split_vma+0x170/0x950 [ 31.270576] split_vma+0xc6/0x110 [ 31.271102] mprotect_fixup+0x8d2/0xb30 [ 31.271714] do_mprotect_pkey+0x87e/0xd40 [ 31.272344] __x64_sys_mprotect+0x78/0xc0 [ 31.272981] do_syscall_64+0x3f/0x90 [ 31.273559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.274339] [ 31.274595] Freed by task 204: [ 31.275065] kasan_save_stack+0x22/0x50 [ 31.275678] kasan_set_track+0x25/0x30 [ 31.276279] kasan_save_free_info+0x2b/0x50 [ 31.276946] __kasan_slab_free+0x10a/0x190 [ 31.277596] kmem_cache_free+0x10d/0x4d0 [ 31.278221] rcu_core+0x8c8/0x2860 [ 31.278759] __do_softirq+0x1b7/0x7d4 [ 31.279337] [ 31.279596] Last potentially related work creation: [ 31.280313] kasan_save_stack+0x22/0x50 [ 31.280931] __kasan_record_aux_stack+0x8e/0xa0 [ 31.281630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.282410] remove_vma+0x139/0x170 [ 31.282958] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.283639] do_vmi_munmap+0x1f1/0x2b0 [ 31.284236] __vm_munmap+0x138/0x3a0 [ 31.284802] __x64_sys_munmap+0x59/0x80 [ 31.285410] do_syscall_64+0x3f/0x90 [ 31.285982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286749] [ 31.287009] The buggy address belongs to the object at ffff88800cbd5000 [ 31.287009] which belongs to the cache vm_area_struct of size 168 [ 31.288792] The buggy address is located 88 bytes inside of [ 31.288792] freed 168-byte region [ffff88800cbd5000, ffff88800cbd50a8) [ 31.290516] [ 31.290773] The buggy address belongs to the physical page: [ 31.291569] page:000000009f219c54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbd5 [ 31.292878] memcg:ffff88800d712001 [ 31.293407] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.294190] page_type: 0xffffffff() [ 31.294739] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.295852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d712001 [ 31.296981] page dumped because: kasan: bad access detected [ 31.297754] [ 31.298001] Memory state around the buggy address: [ 31.298679] ffff88800cbd4f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.299697] ffff88800cbd4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.300682] >ffff88800cbd5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.301682] ^ [ 31.302521] ffff88800cbd5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.303510] ffff88800cbd5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.304494] ================================================================== [ 31.305795] Disabling lock debugging due to kernel taint [ 33.339192] BUG: Bad rss-counter state mm:00000000b4ee5c34 type:MM_FILEPAGES val:33 [ 33.340590] BUG: Bad rss-counter state mm:00000000b4ee5c34 type:MM_ANONPAGES val:22 [ 33.764258] BUG: Bad rss-counter state mm:000000007d9aaa48 type:MM_FILEPAGES val:33 [ 33.765291] BUG: Bad rss-counter state mm:000000007d9aaa48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60068' (ECDSA) to the list of known hosts. 2023/06/20 08:53:43 fuzzer started 2023/06/20 08:53:44 dialing manager at localhost:44161 2023/06/20 08:53:44 checking machine... 2023/06/20 08:53:44 checking revisions... [ 34.539790] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:53:44 testing simple program... [ 34.614144] cgroup: Unknown subsys name 'net' [ 34.647849] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:53:43 Registers: info registers vcpu 0 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff88806ce09b38 RDX=1ffff1100d9c135e RSI=ffffffff813ad6d0 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800db258d0 RIP=ffffffff84532440 RFL=00000282 [--S----] 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=00007f6d5ba36340 CR3=0000000009a2a000 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=dd3620273b61b99d154efb3eff68695e XMM02=2c67c8bc2e329bc3000000000011cc00 XMM03=fb795ef6d65770560000000000124068 XMM04=664402e09e0f976200000000000ae988 XMM05=e4cb8bb95a7664b60000000000133c08 XMM06=18e9e98146acf1e80000000000132a70 XMM07=e042d86d42eb936e00000000001242e8 XMM08=5693cbe7c96f6802000000000011cc60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880196e4ac0 RCX=0000000000000000 RDX=0000000000000014 RSI=ffff888017db7d80 RDI=ffff8880196e4ac0 RBP=ffff888017db7d80 RSP=ffff888017db7cd8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff83874610 R13=0000000000000014 R14=ffff8880196e4ac0 R15=0000000000000000 RIP=ffffffff83874614 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 00007f99e22c5900 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=00007ffcda9b9000 CR3=0000000015fcc000 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