syzkaller login: [ 30.749967] BUG: Bad rss-counter state mm:000000003d534136 type:MM_FILEPAGES val:33 [ 30.751205] BUG: Bad rss-counter state mm:000000003d534136 type:MM_ANONPAGES val:22 [ 30.920736] ================================================================== [ 30.921706] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.922626] Read of size 8 at addr ffff88800e0f7058 by task sshd/221 [ 30.923380] [ 30.923703] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.924551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.925539] Call Trace: [ 30.925881] [ 30.926167] dump_stack_lvl+0x91/0xf0 [ 30.926655] print_report+0xcc/0x620 [ 30.927136] ? __virt_addr_valid+0x102/0x340 [ 30.927688] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.928301] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.928920] kasan_report+0xbe/0xf0 [ 30.929402] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.930030] vma_interval_tree_remove+0xc75/0xec0 [ 30.930644] vma_prepare+0xc54/0x11a0 [ 30.931118] __split_vma+0x5af/0x950 [ 30.931588] ? __pfx___split_vma+0x10/0x10 [ 30.932109] ? find_held_lock+0x2c/0x110 [ 30.932638] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.933210] ? lock_is_held_type+0x9f/0x120 [ 30.933751] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.934353] ? mtree_range_walk+0x632/0x900 [ 30.934899] ? mas_walk+0x5c7/0x7c0 [ 30.935373] do_vmi_munmap+0x1f1/0x2b0 [ 30.935865] mmap_region+0x1f9/0x2660 [ 30.936353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.936862] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.937583] ? __pfx_lock_acquire+0x10/0x10 [ 30.938124] ? __pfx_mmap_region+0x10/0x10 [ 30.938649] ? security_mmap_addr+0x7d/0xa0 [ 30.939177] ? get_unmapped_area+0x1f5/0x3f0 [ 30.939720] do_mmap+0x854/0xf00 [ 30.940157] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.940650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.941213] ksys_mmap_pgoff+0x3af/0x500 [ 30.941732] do_syscall_64+0x3f/0x90 [ 30.942207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942852] RIP: 0033:0x7ff4a0412d82 [ 30.943304] 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 [ 30.945406] RSP: 002b:00007fffea11fcb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.946314] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4a0412d82 [ 30.947152] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff49f84c000 [ 30.947997] RBP: 00007ff49f84c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.948835] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d002d6ec0 [ 30.949690] R13: 00007fffea11fcd0 R14: 00007fffea11fd00 R15: 00007fffea120060 [ 30.950545] [ 30.950840] [ 30.951053] Allocated by task 214: [ 30.951481] kasan_save_stack+0x22/0x50 [ 30.951981] kasan_set_track+0x25/0x30 [ 30.952487] __kasan_slab_alloc+0x59/0x70 [ 30.953016] kmem_cache_alloc+0x16b/0x370 [ 30.953535] vm_area_dup+0x20/0x160 [ 30.953987] __split_vma+0x170/0x950 [ 30.954453] split_vma+0xc6/0x110 [ 30.954887] mprotect_fixup+0x8d2/0xb30 [ 30.955384] do_mprotect_pkey+0x87e/0xd40 [ 30.955912] __x64_sys_mprotect+0x78/0xc0 [ 30.956438] do_syscall_64+0x3f/0x90 [ 30.956915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.957577] [ 30.957794] Freed by task 13: [ 30.958177] kasan_save_stack+0x22/0x50 [ 30.958683] kasan_set_track+0x25/0x30 [ 30.959174] kasan_save_free_info+0x2b/0x50 [ 30.959705] __kasan_slab_free+0x10a/0x190 [ 30.960230] kmem_cache_free+0x10d/0x4d0 [ 30.960736] rcu_core+0x8c8/0x2860 [ 30.961181] __do_softirq+0x1b7/0x7d4 [ 30.961665] [ 30.961879] Last potentially related work creation: [ 30.962467] kasan_save_stack+0x22/0x50 [ 30.962969] __kasan_record_aux_stack+0x8e/0xa0 [ 30.963544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.964184] remove_vma+0x139/0x170 [ 30.964634] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.965184] do_vmi_munmap+0x1f1/0x2b0 [ 30.965688] __vm_munmap+0x138/0x3a0 [ 30.966160] __x64_sys_munmap+0x59/0x80 [ 30.966652] do_syscall_64+0x3f/0x90 [ 30.967129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.967770] [ 30.967989] Second to last potentially related work creation: [ 30.968665] kasan_save_stack+0x22/0x50 [ 30.969167] __kasan_record_aux_stack+0x8e/0xa0 [ 30.969759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.970401] remove_vma+0x139/0x170 [ 30.970848] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.971407] do_vmi_munmap+0x1f1/0x2b0 [ 30.971893] __vm_munmap+0x138/0x3a0 [ 30.972357] __x64_sys_munmap+0x59/0x80 [ 30.972856] do_syscall_64+0x3f/0x90 [ 30.973327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.973972] [ 30.974188] The buggy address belongs to the object at ffff88800e0f7000 [ 30.974188] which belongs to the cache vm_area_struct of size 168 [ 30.975663] The buggy address is located 88 bytes inside of [ 30.975663] freed 168-byte region [ffff88800e0f7000, ffff88800e0f70a8) [ 30.977064] [ 30.977281] The buggy address belongs to the physical page: [ 30.977962] page:000000000fdb0d37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f7 [ 30.979048] memcg:ffff88800e033201 [ 30.979482] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.980189] page_type: 0xffffffff() [ 30.980642] raw: 0100000000000200 ffff88800879fc80 ffffea0000379000 dead00000000000b [ 30.981565] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e033201 [ 30.982493] page dumped because: kasan: bad access detected [ 30.983178] [ 30.983399] Memory state around the buggy address: [ 30.983993] ffff88800e0f6f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.984874] ffff88800e0f6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.985780] >ffff88800e0f7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.986657] ^ [ 30.987405] ffff88800e0f7080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.988291] ffff88800e0f7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.989175] ================================================================== [ 30.990203] Disabling lock debugging due to kernel taint [ 32.944889] BUG: Bad rss-counter state mm:000000000932913a type:MM_FILEPAGES val:33 [ 32.945849] BUG: Bad rss-counter state mm:000000000932913a type:MM_ANONPAGES val:22 [ 33.478179] BUG: Bad rss-counter state mm:00000000ee6bed0c type:MM_FILEPAGES val:33 [ 33.479353] BUG: Bad rss-counter state mm:00000000ee6bed0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2749' (ECDSA) to the list of known hosts. 2023/06/19 12:10:25 fuzzer started 2023/06/19 12:10:26 dialing manager at localhost:44161 2023/06/19 12:10:26 checking machine... 2023/06/19 12:10:26 checking revisions... [ 34.121332] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:10:26 testing simple program... [ 34.169455] cgroup: Unknown subsys name 'net' [ 34.209820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:10:25 Registers: info registers vcpu 0 RAX=ffff88800e2fb4c0 RBX=ffff88800e2fb4c0 RCX=00000000000d000a RDX=00000000800d000a RSI=ffff88800e2fb4c0 RDI=ffff88800844e900 RBP=ffff88800edb7c88 RSP=ffff88800edb7c00 R8 =00000000000d000a R9 =ffffed1001db6f6e R10=0000000000000003 R11=00000000000d000c R12=ffff88800844f780 R13=ffff88800844e900 R14=ffffea000038bec0 R15=00000000800d000a RIP=ffffffff81805cbb RFL=00000042 [---Z---] 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 00007f9b0acdf900 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=00007f9b0b294650 CR3=0000000018430000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007ffca30f5408 CR3=0000000015f0e000 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=2035323a30313a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a30313a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000