syzkaller login: [ 32.255730] BUG: Bad rss-counter state mm:000000009b060ee6 type:MM_FILEPAGES val:33 [ 32.257995] BUG: Bad rss-counter state mm:000000009b060ee6 type:MM_ANONPAGES val:22 [ 32.431771] ================================================================== [ 32.432730] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.433699] Read of size 8 at addr ffff888016831140 by task sshd/220 [ 32.434493] [ 32.434780] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.435699] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.436724] Call Trace: [ 32.437077] [ 32.437369] dump_stack_lvl+0x91/0xf0 [ 32.437876] print_report+0xcc/0x620 [ 32.438375] ? __virt_addr_valid+0x102/0x340 [ 32.438946] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.439577] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.440212] kasan_report+0xbe/0xf0 [ 32.440702] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.441346] vma_interval_tree_remove+0xc75/0xec0 [ 32.441970] vma_prepare+0xc54/0x11a0 [ 32.442461] __split_vma+0x5af/0x950 [ 32.442949] ? __pfx___split_vma+0x10/0x10 [ 32.443498] ? find_held_lock+0x2c/0x110 [ 32.444039] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.444643] ? lock_is_held_type+0x9f/0x120 [ 32.445198] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.445827] ? mtree_range_walk+0x632/0x900 [ 32.446397] ? mas_walk+0x5c7/0x7c0 [ 32.446884] do_vmi_munmap+0x1f1/0x2b0 [ 32.447380] mmap_region+0x1f9/0x2660 [ 32.447857] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.448405] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.449141] ? __pfx_lock_acquire+0x10/0x10 [ 32.449697] ? __pfx_mmap_region+0x10/0x10 [ 32.450245] ? security_mmap_addr+0x7d/0xa0 [ 32.450796] ? get_unmapped_area+0x1f5/0x3f0 [ 32.451365] do_mmap+0x854/0xf00 [ 32.451821] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.452340] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.452920] ksys_mmap_pgoff+0x3af/0x500 [ 32.453437] do_syscall_64+0x3f/0x90 [ 32.453930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.454599] RIP: 0033:0x7f6602ae8d82 [ 32.455074] 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 [ 32.457272] RSP: 002b:00007ffea6efc568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.458216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6602ae8d82 [ 32.459082] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6601f22000 [ 32.459955] RBP: 00007f6601f22000 R08: 0000000000000009 R09: 0000000000001000 [ 32.460839] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cd8bf2ec0 [ 32.461713] R13: 00007ffea6efc580 R14: 00007ffea6efc5b0 R15: 00007ffea6efc910 [ 32.462602] [ 32.462893] [ 32.463110] Allocated by task 213: [ 32.463549] kasan_save_stack+0x22/0x50 [ 32.464075] kasan_set_track+0x25/0x30 [ 32.464601] __kasan_slab_alloc+0x59/0x70 [ 32.465140] kmem_cache_alloc+0x16b/0x370 [ 32.465672] vm_area_dup+0x20/0x160 [ 32.466141] __split_vma+0x170/0x950 [ 32.466626] split_vma+0xc6/0x110 [ 32.467080] mprotect_fixup+0x8d2/0xb30 [ 32.467594] do_mprotect_pkey+0x87e/0xd40 [ 32.468137] __x64_sys_mprotect+0x78/0xc0 [ 32.468697] do_syscall_64+0x3f/0x90 [ 32.469184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.469845] [ 32.470067] Freed by task 213: [ 32.470471] kasan_save_stack+0x22/0x50 [ 32.470990] kasan_set_track+0x25/0x30 [ 32.471477] kasan_save_free_info+0x2b/0x50 [ 32.472018] __kasan_slab_free+0x10a/0x190 [ 32.472577] kmem_cache_free+0x10d/0x4d0 [ 32.473104] rcu_core+0x8c8/0x2860 [ 32.473560] __do_softirq+0x1b7/0x7d4 [ 32.474053] [ 32.474273] Last potentially related work creation: [ 32.474879] kasan_save_stack+0x22/0x50 [ 32.475396] __kasan_record_aux_stack+0x8e/0xa0 [ 32.475988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.476668] remove_vma+0x139/0x170 [ 32.477132] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.477710] do_vmi_munmap+0x1f1/0x2b0 [ 32.478217] __vm_munmap+0x138/0x3a0 [ 32.478707] __x64_sys_munmap+0x59/0x80 [ 32.479205] do_syscall_64+0x3f/0x90 [ 32.479693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.480368] [ 32.480588] The buggy address belongs to the object at ffff8880168310e8 [ 32.480588] which belongs to the cache vm_area_struct of size 168 [ 32.482103] The buggy address is located 88 bytes inside of [ 32.482103] freed 168-byte region [ffff8880168310e8, ffff888016831190) [ 32.483545] [ 32.483769] The buggy address belongs to the physical page: [ 32.484460] page:0000000019cf3616 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16831 [ 32.485592] memcg:ffff88800e28e701 [ 32.486034] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.486710] page_type: 0xffffffff() [ 32.487154] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.488112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e28e701 [ 32.489076] page dumped because: kasan: bad access detected [ 32.489765] [ 32.489984] Memory state around the buggy address: [ 32.490581] ffff888016831000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.491463] ffff888016831080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.492359] >ffff888016831100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.493244] ^ [ 32.493903] ffff888016831180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.494770] ffff888016831200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.495633] ================================================================== [ 32.496697] Disabling lock debugging due to kernel taint [ 34.679106] BUG: Bad rss-counter state mm:000000007cfee381 type:MM_FILEPAGES val:33 [ 34.680139] BUG: Bad rss-counter state mm:000000007cfee381 type:MM_ANONPAGES val:22 [ 35.176925] BUG: Bad rss-counter state mm:00000000aad6b57b type:MM_FILEPAGES val:33 [ 35.177915] BUG: Bad rss-counter state mm:00000000aad6b57b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28384' (ECDSA) to the list of known hosts. 2023/06/20 00:54:11 fuzzer started 2023/06/20 00:54:12 dialing manager at localhost:44161 2023/06/20 00:54:12 checking machine... 2023/06/20 00:54:12 checking revisions... [ 35.831946] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:54:12 testing simple program... [ 35.885772] cgroup: Unknown subsys name 'net' [ 35.962198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:54:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010663318 RCX=0000000000000000 RDX=1ffff110020cc664 RSI=ffffffff81f31855 RDI=ffff888010663320 RBP=00000000000002f0 RSP=ffff88801c9f7a18 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000006 R11=00000000000b6996 R12=ffff8880090d5008 R13=ffff88801c9f7c24 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f3186e RFL=00000212 [----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 00007f52f802e900 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=00007f4eb75aa930 CR3=000000000d4b8000 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=00000000000000000000000000000000 XMM01=3b8d8c283202be95774fdc23325173fa XMM02=2c67c8bc2e329bc3000000000011ceb8 XMM03=fb795ef6d65770560000000000124728 XMM04=dd492ae098291c9800000000000ae988 XMM05=19e9129bd510f2350000000000134288 XMM06=b02cd83aa511958d00000000001330f0 XMM07=e042d86d42eb936e00000000001249a8 XMM08=01b0be83b9b68c60000000000011cf18 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007f52f85e60b0 CR3=000000000f62a000 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=2031313a34353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a34353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000