syzkaller login: [ 32.398012] BUG: Bad rss-counter state mm:00000000372d252c type:MM_FILEPAGES val:33 [ 32.399689] BUG: Bad rss-counter state mm:00000000372d252c type:MM_ANONPAGES val:22 [ 32.564457] ================================================================== [ 32.565389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.566351] Read of size 8 at addr ffff88800ed3f798 by task sshd/219 [ 32.567128] [ 32.567480] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.568376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.569384] Call Trace: [ 32.569755] [ 32.570049] dump_stack_lvl+0x91/0xf0 [ 32.570549] print_report+0xcc/0x620 [ 32.571033] ? __virt_addr_valid+0x102/0x340 [ 32.571589] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.572228] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.572847] kasan_report+0xbe/0xf0 [ 32.573335] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.573975] vma_interval_tree_remove+0xc75/0xec0 [ 32.574586] vma_prepare+0xc54/0x11a0 [ 32.575074] __split_vma+0x5af/0x950 [ 32.575558] ? __pfx___split_vma+0x10/0x10 [ 32.576091] ? find_held_lock+0x2c/0x110 [ 32.576625] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.577213] ? lock_is_held_type+0x9f/0x120 [ 32.577778] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.578393] ? mtree_range_walk+0x632/0x900 [ 32.578947] ? mas_walk+0x5c7/0x7c0 [ 32.579429] do_vmi_munmap+0x1f1/0x2b0 [ 32.579928] mmap_region+0x1f9/0x2660 [ 32.580423] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.580943] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.581675] ? __pfx_lock_acquire+0x10/0x10 [ 32.582215] ? __pfx_mmap_region+0x10/0x10 [ 32.582755] ? security_mmap_addr+0x7d/0xa0 [ 32.583303] ? get_unmapped_area+0x1f5/0x3f0 [ 32.583868] do_mmap+0x854/0xf00 [ 32.584311] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.584825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.585395] ksys_mmap_pgoff+0x3af/0x500 [ 32.585926] do_syscall_64+0x3f/0x90 [ 32.586408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.587065] RIP: 0033:0x7f0166badd82 [ 32.587530] 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 [ 32.589705] RSP: 002b:00007ffe49d590c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.590645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0166badd82 [ 32.591521] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0165fe7000 [ 32.592392] RBP: 00007f0165fe7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.593250] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d08172ec0 [ 32.594167] R13: 00007ffe49d590e0 R14: 00007ffe49d59110 R15: 00007ffe49d59470 [ 32.595049] [ 32.595375] [ 32.595603] Allocated by task 212: [ 32.596040] kasan_save_stack+0x22/0x50 [ 32.596563] kasan_set_track+0x25/0x30 [ 32.597061] __kasan_slab_alloc+0x59/0x70 [ 32.597609] kmem_cache_alloc+0x16b/0x370 [ 32.598138] vm_area_dup+0x20/0x160 [ 32.598601] __split_vma+0x170/0x950 [ 32.599075] split_vma+0xc6/0x110 [ 32.599530] mprotect_fixup+0x8d2/0xb30 [ 32.600046] do_mprotect_pkey+0x87e/0xd40 [ 32.600593] __x64_sys_mprotect+0x78/0xc0 [ 32.601125] do_syscall_64+0x3f/0x90 [ 32.601615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.602263] [ 32.602486] Freed by task 202: [ 32.602887] kasan_save_stack+0x22/0x50 [ 32.603413] kasan_set_track+0x25/0x30 [ 32.603916] kasan_save_free_info+0x2b/0x50 [ 32.604464] __kasan_slab_free+0x10a/0x190 [ 32.605009] kmem_cache_free+0x10d/0x4d0 [ 32.605554] rcu_core+0x8c8/0x2860 [ 32.606008] __do_softirq+0x1b7/0x7d4 [ 32.606497] [ 32.606717] Last potentially related work creation: [ 32.607322] kasan_save_stack+0x22/0x50 [ 32.607830] __kasan_record_aux_stack+0x8e/0xa0 [ 32.608415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.609135] remove_vma+0x139/0x170 [ 32.609605] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.610169] do_vmi_munmap+0x1f1/0x2b0 [ 32.610670] __vm_munmap+0x138/0x3a0 [ 32.611145] __x64_sys_munmap+0x59/0x80 [ 32.611661] do_syscall_64+0x3f/0x90 [ 32.612149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.612814] [ 32.613035] Second to last potentially related work creation: [ 32.613757] kasan_save_stack+0x22/0x50 [ 32.614267] __kasan_record_aux_stack+0x8e/0xa0 [ 32.614865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.615540] remove_vma+0x139/0x170 [ 32.616026] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.616602] do_vmi_munmap+0x1f1/0x2b0 [ 32.617101] mmap_region+0x1f9/0x2660 [ 32.617698] do_mmap+0x854/0xf00 [ 32.618234] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.618849] ksys_mmap_pgoff+0x3af/0x500 [ 32.619437] do_syscall_64+0x3f/0x90 [ 32.619996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.620748] [ 32.621004] The buggy address belongs to the object at ffff88800ed3f740 [ 32.621004] which belongs to the cache vm_area_struct of size 168 [ 32.622651] The buggy address is located 88 bytes inside of [ 32.622651] freed 168-byte region [ffff88800ed3f740, ffff88800ed3f7e8) [ 32.624039] [ 32.624253] The buggy address belongs to the physical page: [ 32.624905] page:00000000d9dc0c86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed3f [ 32.625994] memcg:ffff88800e3d6c01 [ 32.626420] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.627107] page_type: 0xffffffff() [ 32.627554] raw: 0100000000000200 ffff88800879fc80 ffffea00005af780 dead000000000007 [ 32.628469] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3d6c01 [ 32.629371] page dumped because: kasan: bad access detected [ 32.630034] [ 32.630247] Memory state around the buggy address: [ 32.630821] ffff88800ed3f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.631681] ffff88800ed3f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.632528] >ffff88800ed3f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.633373] ^ [ 32.633883] ffff88800ed3f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.634730] ffff88800ed3f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.635576] ================================================================== [ 32.636502] Disabling lock debugging due to kernel taint [ 34.614422] BUG: Bad rss-counter state mm:0000000022b7d566 type:MM_FILEPAGES val:33 [ 34.615594] BUG: Bad rss-counter state mm:0000000022b7d566 type:MM_ANONPAGES val:22 [ 34.979874] BUG: Bad rss-counter state mm:0000000038ec58fb type:MM_FILEPAGES val:33 [ 34.980863] BUG: Bad rss-counter state mm:0000000038ec58fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35901' (ECDSA) to the list of known hosts. 2023/06/19 17:02:49 fuzzer started 2023/06/19 17:02:49 dialing manager at localhost:44161 2023/06/19 17:02:49 checking machine... 2023/06/19 17:02:49 checking revisions... [ 35.692464] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:02:49 testing simple program... [ 35.740766] cgroup: Unknown subsys name 'net' [ 35.790252] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:02:48 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888016a3f758 RCX=ffffffff86137d01 RDX=1ffff11002d47ef6 RSI=0000000000000000 RDI=ffffffff8180c8da RBP=ffff888016a3f7b0 RSP=ffff888016a3f738 R8 =ffffffff86137dd6 R9 =ffff888016a3f798 R10=0000000000038001 R11=0000000000020f00 R12=ffff888016a3f820 R13=0000000000000000 R14=ffff88800f20d1c0 R15=0000000000000000 RIP=ffffffff811fc8a2 RFL=00000202 [-------] 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 00007fb94df67900 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=00007ffe910ce000 CR3=000000000e8ea000 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=ffffffff8110261f RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff8110261f RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba99 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888014756b30 RIP=ffffffff813ad424 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 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=00007f9a663a0220 CR3=000000000c938000 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=454232e6c145a08f6147924ea1fea237 XMM02=000000000011d2d0ec2efd57dc4c00df XMM03=0000000000124330a145bd1370fc492a XMM04=dbecc923316aebe800000000000ae988 XMM05=dfcdbad4f1609c370000000000135170 XMM06=9a78abc7f19de0e90000000000133fd8 XMM07=e042d86d42eb936e00000000001245b0 XMM08=a145bd1370fc492a000000000011d330 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000