syzkaller login: [ 38.925921] BUG: Bad rss-counter state mm:000000005ab80426 type:MM_FILEPAGES val:33 [ 38.928223] BUG: Bad rss-counter state mm:000000005ab80426 type:MM_ANONPAGES val:22 [ 39.093795] ================================================================== [ 39.094889] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.096087] Read of size 8 at addr ffff88800f6c1ed8 by task sshd/220 [ 39.096993] [ 39.097254] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.098267] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.099412] Call Trace: [ 39.099727] [ 39.100015] dump_stack_lvl+0x91/0xf0 [ 39.100508] print_report+0xcc/0x620 [ 39.100988] ? __virt_addr_valid+0x102/0x340 [ 39.101556] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.102181] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.102814] kasan_report+0xbe/0xf0 [ 39.103295] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.103919] vma_interval_tree_remove+0xc75/0xec0 [ 39.104520] vma_prepare+0xc54/0x11a0 [ 39.104992] __split_vma+0x5af/0x950 [ 39.105467] ? __pfx___split_vma+0x10/0x10 [ 39.105997] ? find_held_lock+0x2c/0x110 [ 39.106520] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.107087] ? lock_is_held_type+0x9f/0x120 [ 39.107618] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.108234] ? mtree_range_walk+0x632/0x900 [ 39.108786] ? mas_walk+0x5c7/0x7c0 [ 39.109266] do_vmi_munmap+0x1f1/0x2b0 [ 39.109762] mmap_region+0x1f9/0x2660 [ 39.110241] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.110762] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.111643] ? __pfx_lock_acquire+0x10/0x10 [ 39.112175] ? __pfx_mmap_region+0x10/0x10 [ 39.112701] ? security_mmap_addr+0x7d/0xa0 [ 39.113223] ? get_unmapped_area+0x1f5/0x3f0 [ 39.113769] do_mmap+0x854/0xf00 [ 39.114203] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.114699] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.115297] ksys_mmap_pgoff+0x3af/0x500 [ 39.115802] do_syscall_64+0x3f/0x90 [ 39.116284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.116929] RIP: 0033:0x7fb4f596dd82 [ 39.117386] 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 [ 39.119493] RSP: 002b:00007ffedc4da708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.120395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4f596dd82 [ 39.121231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4f4da7000 [ 39.122071] RBP: 00007fb4f4da7000 R08: 0000000000000009 R09: 0000000000001000 [ 39.122925] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560074e96ec0 [ 39.123763] R13: 00007ffedc4da720 R14: 00007ffedc4da750 R15: 00007ffedc4daab0 [ 39.124609] [ 39.124903] [ 39.125121] Allocated by task 213: [ 39.125550] kasan_save_stack+0x22/0x50 [ 39.126049] kasan_set_track+0x25/0x30 [ 39.126541] __kasan_slab_alloc+0x59/0x70 [ 39.127087] kmem_cache_alloc+0x16b/0x370 [ 39.127596] vm_area_dup+0x20/0x160 [ 39.128045] __split_vma+0x170/0x950 [ 39.128507] split_vma+0xc6/0x110 [ 39.128939] mprotect_fixup+0x8d2/0xb30 [ 39.129444] do_mprotect_pkey+0x87e/0xd40 [ 39.129958] __x64_sys_mprotect+0x78/0xc0 [ 39.130473] do_syscall_64+0x3f/0x90 [ 39.130964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.131597] [ 39.131817] Freed by task 213: [ 39.132203] kasan_save_stack+0x22/0x50 [ 39.132699] kasan_set_track+0x25/0x30 [ 39.133188] kasan_save_free_info+0x2b/0x50 [ 39.133715] __kasan_slab_free+0x10a/0x190 [ 39.134245] kmem_cache_free+0x10d/0x4d0 [ 39.134761] rcu_core+0x8c8/0x2860 [ 39.135212] __do_softirq+0x1b7/0x7d4 [ 39.135690] [ 39.135907] Last potentially related work creation: [ 39.136487] kasan_save_stack+0x22/0x50 [ 39.136988] __kasan_record_aux_stack+0x8e/0xa0 [ 39.137557] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.138196] remove_vma+0x139/0x170 [ 39.138648] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.139225] do_vmi_munmap+0x1f1/0x2b0 [ 39.139716] __vm_munmap+0x138/0x3a0 [ 39.140185] __x64_sys_munmap+0x59/0x80 [ 39.140686] do_syscall_64+0x3f/0x90 [ 39.141159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.141804] [ 39.142020] The buggy address belongs to the object at ffff88800f6c1e80 [ 39.142020] which belongs to the cache vm_area_struct of size 168 [ 39.143507] The buggy address is located 88 bytes inside of [ 39.143507] freed 168-byte region [ffff88800f6c1e80, ffff88800f6c1f28) [ 39.144910] [ 39.145124] The buggy address belongs to the physical page: [ 39.145781] page:00000000bdf98d48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6c1 [ 39.146854] memcg:ffff888014545101 [ 39.147282] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.147921] page_type: 0xffffffff() [ 39.148364] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.149283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014545101 [ 39.150183] page dumped because: kasan: bad access detected [ 39.150864] [ 39.151084] Memory state around the buggy address: [ 39.151688] ffff88800f6c1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.152540] ffff88800f6c1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.153394] >ffff88800f6c1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.154237] ^ [ 39.154966] ffff88800f6c1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.155821] ffff88800f6c1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.156660] ================================================================== [ 39.157755] Disabling lock debugging due to kernel taint [ 41.101532] BUG: Bad rss-counter state mm:00000000afa796b8 type:MM_FILEPAGES val:33 [ 41.102401] BUG: Bad rss-counter state mm:00000000afa796b8 type:MM_ANONPAGES val:22 [ 41.580864] BUG: Bad rss-counter state mm:00000000f488b38c type:MM_FILEPAGES val:33 [ 41.582020] BUG: Bad rss-counter state mm:00000000f488b38c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45807' (ECDSA) to the list of known hosts. 2023/06/19 18:41:15 fuzzer started 2023/06/19 18:41:16 dialing manager at localhost:44161 2023/06/19 18:41:16 checking machine... 2023/06/19 18:41:16 checking revisions... [ 42.265275] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:41:16 testing simple program... [ 42.316005] cgroup: Unknown subsys name 'net' [ 42.370258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:41:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f16fc235650 CR3=0000000017f8c000 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=31343a3831203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732035313a3134 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343934 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110033f2ab7 RSI=ffffffff814c84fa RDI=ffff888019f955b8 RBP=ffff888019f951c0 RSP=ffff88800f1ff3f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888019f951c0 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88801670cbe0 RIP=ffffffff81374512 RFL=00000216 [----AP-] 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 00007f16fbc80900 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=00007f16fc237618 CR3=000000000ca28000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000