syzkaller login: [ 24.630410] BUG: Bad rss-counter state mm:000000001278106c type:MM_FILEPAGES val:33 [ 24.631166] BUG: Bad rss-counter state mm:000000001278106c type:MM_ANONPAGES val:22 [ 24.791439] ================================================================== [ 24.792487] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.793681] Read of size 8 at addr ffff88800eb62310 by task sshd/219 [ 24.794595] [ 24.794851] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.795912] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.796875] Call Trace: [ 24.797187] [ 24.797466] dump_stack_lvl+0x91/0xf0 [ 24.797946] print_report+0xcc/0x620 [ 24.798419] ? __virt_addr_valid+0x102/0x340 [ 24.798958] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.799563] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.800170] kasan_report+0xbe/0xf0 [ 24.800630] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.801232] vma_interval_tree_remove+0xc75/0xec0 [ 24.801810] vma_prepare+0xc54/0x11a0 [ 24.802280] __split_vma+0x5af/0x950 [ 24.802738] ? __pfx___split_vma+0x10/0x10 [ 24.803266] ? find_held_lock+0x2c/0x110 [ 24.803783] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.804356] ? lock_is_held_type+0x9f/0x120 [ 24.804905] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.805522] ? mtree_range_walk+0x632/0x900 [ 24.806083] ? mas_walk+0x5c7/0x7c0 [ 24.806566] do_vmi_munmap+0x1f1/0x2b0 [ 24.807080] mmap_region+0x1f9/0x2660 [ 24.807573] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.808094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.808815] ? __pfx_lock_acquire+0x10/0x10 [ 24.809356] ? __pfx_mmap_region+0x10/0x10 [ 24.809890] ? security_mmap_addr+0x7d/0xa0 [ 24.810427] ? get_unmapped_area+0x1f5/0x3f0 [ 24.810968] do_mmap+0x854/0xf00 [ 24.811415] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.811918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.812493] ksys_mmap_pgoff+0x3af/0x500 [ 24.813005] do_syscall_64+0x3f/0x90 [ 24.813498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.814144] RIP: 0033:0x7fc98d80dd82 [ 24.814603] 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 [ 24.816767] RSP: 002b:00007ffde366afc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.817655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc98d80dd82 [ 24.818495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc98cc47000 [ 24.819358] RBP: 00007fc98cc47000 R08: 0000000000000009 R09: 0000000000001000 [ 24.820213] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561991318ec0 [ 24.821067] R13: 00007ffde366afe0 R14: 00007ffde366b010 R15: 00007ffde366b370 [ 24.821940] [ 24.822225] [ 24.822438] Allocated by task 212: [ 24.822860] kasan_save_stack+0x22/0x50 [ 24.823365] kasan_set_track+0x25/0x30 [ 24.823845] __kasan_slab_alloc+0x59/0x70 [ 24.824362] kmem_cache_alloc+0x16b/0x370 [ 24.824872] vm_area_dup+0x20/0x160 [ 24.825318] __split_vma+0x170/0x950 [ 24.825779] split_vma+0xc6/0x110 [ 24.826217] mprotect_fixup+0x8d2/0xb30 [ 24.826712] do_mprotect_pkey+0x87e/0xd40 [ 24.827229] __x64_sys_mprotect+0x78/0xc0 [ 24.827752] do_syscall_64+0x3f/0x90 [ 24.828211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.828831] [ 24.829041] Freed by task 212: [ 24.829423] kasan_save_stack+0x22/0x50 [ 24.829912] kasan_set_track+0x25/0x30 [ 24.830400] kasan_save_free_info+0x2b/0x50 [ 24.830917] __kasan_slab_free+0x10a/0x190 [ 24.831450] kmem_cache_free+0x10d/0x4d0 [ 24.831948] rcu_core+0x8c8/0x2860 [ 24.832382] __do_softirq+0x1b7/0x7d4 [ 24.832843] [ 24.833054] Last potentially related work creation: [ 24.833614] kasan_save_stack+0x22/0x50 [ 24.834170] __kasan_record_aux_stack+0x8e/0xa0 [ 24.834727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.835367] remove_vma+0x139/0x170 [ 24.835804] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.836352] do_vmi_munmap+0x1f1/0x2b0 [ 24.836832] __vm_munmap+0x138/0x3a0 [ 24.837281] __x64_sys_munmap+0x59/0x80 [ 24.837761] do_syscall_64+0x3f/0x90 [ 24.838218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.838844] [ 24.839065] The buggy address belongs to the object at ffff88800eb622b8 [ 24.839065] which belongs to the cache vm_area_struct of size 168 [ 24.840477] The buggy address is located 88 bytes inside of [ 24.840477] freed 168-byte region [ffff88800eb622b8, ffff88800eb62360) [ 24.841826] [ 24.842039] The buggy address belongs to the physical page: [ 24.842677] page:00000000ae70e227 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb62 [ 24.843735] memcg:ffff88801812ff01 [ 24.844149] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.844772] page_type: 0xffffffff() [ 24.845211] raw: 0100000000000200 ffff88800879fc80 ffffea0000603880 dead000000000006 [ 24.846095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801812ff01 [ 24.846970] page dumped because: kasan: bad access detected [ 24.847608] [ 24.847817] Memory state around the buggy address: [ 24.848378] ffff88800eb62200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.849201] ffff88800eb62280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.850025] >ffff88800eb62300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.850852] ^ [ 24.851314] ffff88800eb62380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.852138] ffff88800eb62400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.852956] ================================================================== [ 24.853965] Disabling lock debugging due to kernel taint [ 26.601565] BUG: Bad rss-counter state mm:000000007f6c5202 type:MM_FILEPAGES val:33 [ 26.602308] BUG: Bad rss-counter state mm:000000007f6c5202 type:MM_ANONPAGES val:22 [ 27.086761] BUG: Bad rss-counter state mm:00000000c8d01c6e type:MM_FILEPAGES val:33 [ 27.087784] BUG: Bad rss-counter state mm:00000000c8d01c6e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4162' (ECDSA) to the list of known hosts. 2023/06/19 21:00:14 fuzzer started 2023/06/19 21:00:14 dialing manager at localhost:44161 2023/06/19 21:00:14 checking machine... 2023/06/19 21:00:14 checking revisions... [ 27.795298] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:00:15 testing simple program... [ 27.839061] cgroup: Unknown subsys name 'net' [ 27.892080] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:13 Registers: info registers vcpu 0 RAX=0000000080010004 RBX=ffff88800f310000 RCX=0000000000000000 RDX=000000000001c062 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800f310180 RSP=ffff88806ce09de8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=ffff88806ce09ff8 R12=000000000001c062 R13=ffff88800f3144c8 R14=0000000000000000 R15=ffff88800f310008 RIP=ffffffff821920cf RFL=00000046 [---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 00007f4db1bf6700 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=0000557fda852218 CR3=000000000e744000 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=2034313a30303a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a30303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000fffbd421 RCX=0000000000000000 RDX=1ffff1100d9e5281 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888008d87c98 RSP=ffff888008d87b50 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000003 R12=ffff88806cf293c0 R13=00000000fffbd421 R14=0000000000000000 R15=0000000000000004 RIP=ffffffff814c03b4 RFL=00000046 [---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 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=00007f2942918100 CR3=000000000ba76000 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=fa99d7583b67148d1c4274dc6c6994f7 XMM02=0000000000122e80ec2efd57dc4c00df XMM03=00000000001254f0fac1bb36445a6cbb XMM04=75a3ea57edb23d3d00000000000ae988 XMM05=dfcdbad4f1609c3700000000001350e8 XMM06=806171799158d9670000000000134f70 XMM07=e042d86d42eb936e00000000001257c8 XMM08=fac1bb36445a6cbb0000000000122ee0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000