syzkaller login: [ 31.940652] BUG: Bad rss-counter state mm:00000000f628b5f0 type:MM_FILEPAGES val:33 [ 31.941578] BUG: Bad rss-counter state mm:00000000f628b5f0 type:MM_ANONPAGES val:22 [ 32.071004] ================================================================== [ 32.071719] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.072410] Read of size 8 at addr ffff888016aad058 by task sshd/220 [ 32.072983] [ 32.073144] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.073793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.074526] Call Trace: [ 32.074753] [ 32.075061] dump_stack_lvl+0x91/0xf0 [ 32.075473] print_report+0xcc/0x620 [ 32.075837] ? __virt_addr_valid+0x102/0x340 [ 32.076244] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.076705] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.077143] kasan_report+0xbe/0xf0 [ 32.077492] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.077955] vma_interval_tree_remove+0xc75/0xec0 [ 32.078397] vma_prepare+0xc54/0x11a0 [ 32.078744] __split_vma+0x5af/0x950 [ 32.079087] ? __pfx___split_vma+0x10/0x10 [ 32.079475] ? find_held_lock+0x2c/0x110 [ 32.079855] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.080268] ? lock_is_held_type+0x9f/0x120 [ 32.080648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.081103] ? mtree_range_walk+0x632/0x900 [ 32.081518] ? mas_walk+0x5c7/0x7c0 [ 32.081860] do_vmi_munmap+0x1f1/0x2b0 [ 32.082223] mmap_region+0x1f9/0x2660 [ 32.082581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.082964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.083511] ? __pfx_lock_acquire+0x10/0x10 [ 32.083910] ? __pfx_mmap_region+0x10/0x10 [ 32.084301] ? security_mmap_addr+0x7d/0xa0 [ 32.084685] ? get_unmapped_area+0x1f5/0x3f0 [ 32.085101] do_mmap+0x854/0xf00 [ 32.085431] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.085799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.086206] ksys_mmap_pgoff+0x3af/0x500 [ 32.086569] do_syscall_64+0x3f/0x90 [ 32.086916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.087402] RIP: 0033:0x7f85bfc66d82 [ 32.087738] 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 [ 32.089260] RSP: 002b:00007ffd79147f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.089935] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85bfc66d82 [ 32.090554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85bf0a0000 [ 32.091190] RBP: 00007f85bf0a0000 R08: 0000000000000009 R09: 0000000000001000 [ 32.091842] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555703a6dec0 [ 32.092477] R13: 00007ffd79147f40 R14: 00007ffd79147f70 R15: 00007ffd791482d0 [ 32.093129] [ 32.093338] [ 32.093493] Allocated by task 213: [ 32.093813] kasan_save_stack+0x22/0x50 [ 32.094178] kasan_set_track+0x25/0x30 [ 32.094537] __kasan_slab_alloc+0x59/0x70 [ 32.094919] kmem_cache_alloc+0x16b/0x370 [ 32.095298] vm_area_dup+0x20/0x160 [ 32.095651] __split_vma+0x170/0x950 [ 32.095986] split_vma+0xc6/0x110 [ 32.096305] mprotect_fixup+0x8d2/0xb30 [ 32.096679] do_mprotect_pkey+0x87e/0xd40 [ 32.097075] __x64_sys_mprotect+0x78/0xc0 [ 32.097448] do_syscall_64+0x3f/0x90 [ 32.097808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.098308] [ 32.098466] Freed by task 213: [ 32.098752] kasan_save_stack+0x22/0x50 [ 32.099126] kasan_set_track+0x25/0x30 [ 32.099730] kasan_save_free_info+0x2b/0x50 [ 32.100140] __kasan_slab_free+0x10a/0x190 [ 32.100540] kmem_cache_free+0x10d/0x4d0 [ 32.100892] rcu_core+0x8c8/0x2860 [ 32.101208] __do_softirq+0x1b7/0x7d4 [ 32.101554] [ 32.101719] Last potentially related work creation: [ 32.102154] kasan_save_stack+0x22/0x50 [ 32.102520] __kasan_record_aux_stack+0x8e/0xa0 [ 32.102930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.103404] remove_vma+0x139/0x170 [ 32.103742] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.104146] do_vmi_munmap+0x1f1/0x2b0 [ 32.104500] __vm_munmap+0x138/0x3a0 [ 32.104862] __x64_sys_munmap+0x59/0x80 [ 32.105252] do_syscall_64+0x3f/0x90 [ 32.105605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.106104] [ 32.106264] The buggy address belongs to the object at ffff888016aad000 [ 32.106264] which belongs to the cache vm_area_struct of size 168 [ 32.107431] The buggy address is located 88 bytes inside of [ 32.107431] freed 168-byte region [ffff888016aad000, ffff888016aad0a8) [ 32.108480] [ 32.108636] The buggy address belongs to the physical page: [ 32.109118] page:000000001b9a92ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16aad [ 32.109957] memcg:ffff888016d06e01 [ 32.110255] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.110737] page_type: 0xffffffff() [ 32.111097] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.111779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d06e01 [ 32.112457] page dumped because: kasan: bad access detected [ 32.112942] [ 32.113093] Memory state around the buggy address: [ 32.113522] ffff888016aacf00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc [ 32.114166] ffff888016aacf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.114803] >ffff888016aad000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.115447] ^ [ 32.116005] ffff888016aad080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.116630] ffff888016aad100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.117253] ================================================================== [ 32.118073] Disabling lock debugging due to kernel taint [ 34.111205] BUG: Bad rss-counter state mm:0000000036464f19 type:MM_FILEPAGES val:33 [ 34.111945] BUG: Bad rss-counter state mm:0000000036464f19 type:MM_ANONPAGES val:22 [ 34.475785] BUG: Bad rss-counter state mm:00000000b6e1e9b0 type:MM_FILEPAGES val:33 [ 34.476594] BUG: Bad rss-counter state mm:00000000b6e1e9b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44684' (ECDSA) to the list of known hosts. 2023/06/20 09:09:40 fuzzer started 2023/06/20 09:09:40 dialing manager at localhost:44161 2023/06/20 09:09:40 checking machine... 2023/06/20 09:09:40 checking revisions... [ 35.128390] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:09:40 testing simple program... [ 35.176909] cgroup: Unknown subsys name 'net' [ 35.215119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:09:38 Registers: info registers vcpu 0 RAX=1ffffffff0a92574 RBX=ffffffff85d3d010 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff84905d00 RDI=ffffffff87f33960 RBP=ffffffff87f33960 RSP=ffff888015c07d00 R8 =0000000000000002 R9 =0000000000000000 R10=ffff888018a77b93 R11=0000000000000000 R12=ffffffff87f33960 R13=0000000000000000 R14=ffffffff87b67200 R15=0000000000000000 RIP=ffffffff812c198e 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 00007f8e25ca6900 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=00007ffc99015000 CR3=000000000d684000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c58400 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=00007f90d608d320 CR3=0000000013a1e000 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=23836f16713c758b784ef774d169a8f6 XMM02=ec2efd57dc4c00df000000000011d028 XMM03=f09adf456898071e000000000011d0f8 XMM04=5e3a9857a6ddb41d00000000000ae988 XMM05=19e9129bd510f23500000000001340d8 XMM06=2e8b42b7af8ee1860000000000132f40 XMM07=e042d86d42eb936e0000000000124858 XMM08=f09adf456898071e000000000011d0f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000