syzkaller login: [ 31.204391] BUG: Bad rss-counter state mm:00000000d7372e50 type:MM_FILEPAGES val:33 [ 31.205350] BUG: Bad rss-counter state mm:00000000d7372e50 type:MM_ANONPAGES val:22 [ 31.324370] ================================================================== [ 31.325067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.325703] Read of size 8 at addr ffff8880163cc140 by task sshd/220 [ 31.326224] [ 31.326378] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.326964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.327615] Call Trace: [ 31.327835] [ 31.328041] dump_stack_lvl+0x91/0xf0 [ 31.328406] print_report+0xcc/0x620 [ 31.328820] ? __virt_addr_valid+0x102/0x340 [ 31.329202] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.329635] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.330072] kasan_report+0xbe/0xf0 [ 31.330450] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.330882] vma_interval_tree_remove+0xc75/0xec0 [ 31.331301] vma_prepare+0xc54/0x11a0 [ 31.331635] __split_vma+0x5af/0x950 [ 31.331963] ? __pfx___split_vma+0x10/0x10 [ 31.332313] ? find_held_lock+0x2c/0x110 [ 31.332708] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.333103] ? lock_is_held_type+0x9f/0x120 [ 31.333483] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.333902] ? mtree_range_walk+0x632/0x900 [ 31.334290] ? mas_walk+0x5c7/0x7c0 [ 31.334614] do_vmi_munmap+0x1f1/0x2b0 [ 31.334951] mmap_region+0x1f9/0x2660 [ 31.335285] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.335649] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.336155] ? __pfx_lock_acquire+0x10/0x10 [ 31.336517] ? __pfx_mmap_region+0x10/0x10 [ 31.336931] ? security_mmap_addr+0x7d/0xa0 [ 31.337304] ? get_unmapped_area+0x1f5/0x3f0 [ 31.337678] do_mmap+0x854/0xf00 [ 31.337980] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.338311] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.338693] ksys_mmap_pgoff+0x3af/0x500 [ 31.339024] do_syscall_64+0x3f/0x90 [ 31.339349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.339782] RIP: 0033:0x7fd52224cd82 [ 31.340092] 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 [ 31.341570] RSP: 002b:00007fff0be037f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.342206] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd52224cd82 [ 31.342788] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd521686000 [ 31.343391] RBP: 00007fd521686000 R08: 0000000000000009 R09: 0000000000001000 [ 31.343973] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561280fbeec0 [ 31.344622] R13: 00007fff0be03810 R14: 00007fff0be03840 R15: 00007fff0be03ba0 [ 31.345245] [ 31.345445] [ 31.345593] Allocated by task 213: [ 31.345886] kasan_save_stack+0x22/0x50 [ 31.346241] kasan_set_track+0x25/0x30 [ 31.346590] __kasan_slab_alloc+0x59/0x70 [ 31.346958] kmem_cache_alloc+0x16b/0x370 [ 31.347355] vm_area_dup+0x20/0x160 [ 31.347683] __split_vma+0x170/0x950 [ 31.348006] split_vma+0xc6/0x110 [ 31.348310] mprotect_fixup+0x8d2/0xb30 [ 31.348718] do_mprotect_pkey+0x87e/0xd40 [ 31.349082] __x64_sys_mprotect+0x78/0xc0 [ 31.349450] do_syscall_64+0x3f/0x90 [ 31.349787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350239] [ 31.350383] Freed by task 213: [ 31.350648] kasan_save_stack+0x22/0x50 [ 31.351000] kasan_set_track+0x25/0x30 [ 31.351349] kasan_save_free_info+0x2b/0x50 [ 31.351721] __kasan_slab_free+0x10a/0x190 [ 31.352104] kmem_cache_free+0x10d/0x4d0 [ 31.352453] rcu_core+0x8c8/0x2860 [ 31.352804] __do_softirq+0x1b7/0x7d4 [ 31.353131] [ 31.353282] Last potentially related work creation: [ 31.353691] kasan_save_stack+0x22/0x50 [ 31.354043] __kasan_record_aux_stack+0x8e/0xa0 [ 31.354482] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.354933] remove_vma+0x139/0x170 [ 31.355245] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.355640] do_vmi_munmap+0x1f1/0x2b0 [ 31.355987] __vm_munmap+0x138/0x3a0 [ 31.356314] __x64_sys_munmap+0x59/0x80 [ 31.356729] do_syscall_64+0x3f/0x90 [ 31.357071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357541] [ 31.357695] The buggy address belongs to the object at ffff8880163cc0e8 [ 31.357695] which belongs to the cache vm_area_struct of size 168 [ 31.358685] The buggy address is located 88 bytes inside of [ 31.358685] freed 168-byte region [ffff8880163cc0e8, ffff8880163cc190) [ 31.359954] [ 31.360108] The buggy address belongs to the physical page: [ 31.360574] page:00000000b05106bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163cc [ 31.361389] memcg:ffff88800f576101 [ 31.361683] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.362131] page_type: 0xffffffff() [ 31.362449] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.363083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f576101 [ 31.363708] page dumped because: kasan: bad access detected [ 31.364166] [ 31.364349] Memory state around the buggy address: [ 31.364875] ffff8880163cc000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.365474] ffff8880163cc080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.366059] >ffff8880163cc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.366736] ^ [ 31.367189] ffff8880163cc180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.367762] ffff8880163cc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.368423] ================================================================== [ 31.369261] Disabling lock debugging due to kernel taint [ 33.302530] BUG: Bad rss-counter state mm:00000000206068c6 type:MM_FILEPAGES val:33 [ 33.303248] BUG: Bad rss-counter state mm:00000000206068c6 type:MM_ANONPAGES val:22 [ 33.647854] BUG: Bad rss-counter state mm:000000008e02e121 type:MM_FILEPAGES val:33 [ 33.648564] BUG: Bad rss-counter state mm:000000008e02e121 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30578' (ECDSA) to the list of known hosts. 2023/06/21 08:33:52 fuzzer started 2023/06/21 08:33:52 dialing manager at localhost:36067 2023/06/21 08:33:52 checking machine... 2023/06/21 08:33:52 checking revisions... [ 34.228396] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:33:52 testing simple program... [ 34.270082] cgroup: Unknown subsys name 'net' [ 34.304402] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:33:52 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff8880161f7a30 RSI=ffff8880161f7a18 RDI=ffff8880161f7658 RBP=ffff8880161f0000 RSP=ffff8880161f7618 R8 =0000000000000001 R9 =ffff8880161f7688 R10=0000000000038001 R11=0000000000020c51 R12=ffff8880161f76a8 R13=ffff8880161f7690 R14=ffff8880161f7a18 R15=ffff8880161f7648 RIP=ffffffff81130930 RFL=00000292 [--S-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 00007f4a637ea900 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=0000555a4dc26954 CR3=000000001ced6000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8189016530 CR3=00000000069bc000 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=2031353a33333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000