syzkaller login: [ 39.102280] BUG: Bad rss-counter state mm:00000000afc5596b type:MM_FILEPAGES val:33 [ 39.103569] BUG: Bad rss-counter state mm:00000000afc5596b type:MM_ANONPAGES val:22 [ 39.281135] ================================================================== [ 39.282235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.283242] Read of size 8 at addr ffff88800dd434e0 by task sshd/218 [ 39.284065] [ 39.284294] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.285246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.286265] Call Trace: [ 39.286599] [ 39.286902] dump_stack_lvl+0x91/0xf0 [ 39.287433] print_report+0xcc/0x620 [ 39.287938] ? __virt_addr_valid+0x102/0x340 [ 39.288520] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.289178] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.289839] kasan_report+0xbe/0xf0 [ 39.290342] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.290994] vma_interval_tree_remove+0xc75/0xec0 [ 39.291629] vma_prepare+0xc54/0x11a0 [ 39.292135] __split_vma+0x5af/0x950 [ 39.292632] ? __pfx___split_vma+0x10/0x10 [ 39.293208] ? find_held_lock+0x2c/0x110 [ 39.293756] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.294356] ? lock_is_held_type+0x9f/0x120 [ 39.294918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.295564] ? mtree_range_walk+0x632/0x900 [ 39.296142] ? mas_walk+0x5c7/0x7c0 [ 39.296642] do_vmi_munmap+0x1f1/0x2b0 [ 39.297170] mmap_region+0x1f9/0x2660 [ 39.297678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.298224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.298974] ? __pfx_lock_acquire+0x10/0x10 [ 39.299536] ? __pfx_mmap_region+0x10/0x10 [ 39.300094] ? security_mmap_addr+0x7d/0xa0 [ 39.300649] ? get_unmapped_area+0x1f5/0x3f0 [ 39.301232] do_mmap+0x854/0xf00 [ 39.301695] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.302215] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.302799] ksys_mmap_pgoff+0x3af/0x500 [ 39.303327] do_syscall_64+0x3f/0x90 [ 39.303823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.304495] RIP: 0033:0x7f3211e51d82 [ 39.304967] 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 [ 39.307166] RSP: 002b:00007fff307a0978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.308096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3211e51d82 [ 39.308976] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f321128b000 [ 39.309859] RBP: 00007f321128b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.310741] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb500dbec0 [ 39.311613] R13: 00007fff307a0990 R14: 00007fff307a09c0 R15: 00007fff307a0d20 [ 39.312502] [ 39.312807] [ 39.313032] Allocated by task 211: [ 39.313477] kasan_save_stack+0x22/0x50 [ 39.314003] kasan_set_track+0x25/0x30 [ 39.314516] __kasan_slab_alloc+0x59/0x70 [ 39.315063] kmem_cache_alloc+0x16b/0x370 [ 39.315598] vm_area_dup+0x20/0x160 [ 39.316072] __split_vma+0x170/0x950 [ 39.316558] split_vma+0xc6/0x110 [ 39.317033] mprotect_fixup+0x8d2/0xb30 [ 39.317560] do_mprotect_pkey+0x87e/0xd40 [ 39.318105] __x64_sys_mprotect+0x78/0xc0 [ 39.318647] do_syscall_64+0x3f/0x90 [ 39.319141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.319797] [ 39.320018] Freed by task 211: [ 39.320421] kasan_save_stack+0x22/0x50 [ 39.320942] kasan_set_track+0x25/0x30 [ 39.321456] kasan_save_free_info+0x2b/0x50 [ 39.321994] __kasan_slab_free+0x10a/0x190 [ 39.322541] kmem_cache_free+0x10d/0x4d0 [ 39.323064] rcu_core+0x8c8/0x2860 [ 39.323529] __do_softirq+0x1b7/0x7d4 [ 39.324022] [ 39.324255] Last potentially related work creation: [ 39.324869] kasan_save_stack+0x22/0x50 [ 39.325399] __kasan_record_aux_stack+0x8e/0xa0 [ 39.326003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.326681] remove_vma+0x139/0x170 [ 39.327137] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.327702] do_vmi_munmap+0x1f1/0x2b0 [ 39.328214] __vm_munmap+0x138/0x3a0 [ 39.328694] __x64_sys_munmap+0x59/0x80 [ 39.329238] do_syscall_64+0x3f/0x90 [ 39.329727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.330398] [ 39.330628] The buggy address belongs to the object at ffff88800dd43488 [ 39.330628] which belongs to the cache vm_area_struct of size 168 [ 39.332163] The buggy address is located 88 bytes inside of [ 39.332163] freed 168-byte region [ffff88800dd43488, ffff88800dd43530) [ 39.333731] [ 39.333965] The buggy address belongs to the physical page: [ 39.334690] page:0000000075f920ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd43 [ 39.335889] memcg:ffff88800e993d01 [ 39.336363] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.337147] page_type: 0xffffffff() [ 39.337639] raw: 0100000000000200 ffff88800879fc80 ffffea00005b6d40 dead000000000007 [ 39.338635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e993d01 [ 39.339642] page dumped because: kasan: bad access detected [ 39.340376] [ 39.340611] Memory state around the buggy address: [ 39.341254] ffff88800dd43380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.342199] ffff88800dd43400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.343137] >ffff88800dd43480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.344073] ^ [ 39.344899] ffff88800dd43500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 39.345842] ffff88800dd43580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.346778] ================================================================== [ 39.348035] Disabling lock debugging due to kernel taint [ 41.422415] BUG: Bad rss-counter state mm:0000000001ad28b3 type:MM_FILEPAGES val:33 [ 41.423697] BUG: Bad rss-counter state mm:0000000001ad28b3 type:MM_ANONPAGES val:22 [ 41.762756] BUG: Bad rss-counter state mm:000000008fc98959 type:MM_FILEPAGES val:33 [ 41.763329] BUG: Bad rss-counter state mm:000000008fc98959 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3459' (ECDSA) to the list of known hosts. 2023/06/20 10:45:51 fuzzer started 2023/06/20 10:45:51 dialing manager at localhost:44161 2023/06/20 10:45:51 checking machine... 2023/06/20 10:45:51 checking revisions... [ 42.434259] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:45:51 testing simple program... [ 42.473344] cgroup: Unknown subsys name 'net' [ 42.517526] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:45:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f9018a989b9 RCX=0000000000000000 RDX=ffff888015989b40 RSI=00007f9018a989b9 RDI=ffffffff856528e0 RBP=00007f9018a989b9 RSP=ffff888018d0fa90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888018d0fbb8 R13=0000000000000000 R14=ffff888015989b40 R15=0000000000000000 RIP=ffffffff814c83da 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 00007f90185ac900 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=00007f901856001c CR3=000000000e5de000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=0000001c17b60468 RBX=0000000000000000 RCX=00000000000006e0 RDX=000000000000001c RSI=ffff88806cf28140 RDI=00000000000544b0 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f14a3 R11=0000001c1776f004 R12=00000000000544b0 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000012 [----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 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=00007ffd74f0aa68 CR3=0000000005482000 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=00007fc1857cd5100000561aff914790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000