syzkaller login: [ 31.132170] BUG: Bad rss-counter state mm:0000000087d95a09 type:MM_FILEPAGES val:33 [ 31.133280] BUG: Bad rss-counter state mm:0000000087d95a09 type:MM_ANONPAGES val:22 [ 31.300941] ================================================================== [ 31.302076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.303297] Read of size 8 at addr ffff88800f61e310 by task sshd/220 [ 31.304064] [ 31.304285] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.305189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.306173] Call Trace: [ 31.306497] [ 31.306781] dump_stack_lvl+0x91/0xf0 [ 31.307272] print_report+0xcc/0x620 [ 31.307764] ? __virt_addr_valid+0x102/0x340 [ 31.308317] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.308943] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.309563] kasan_report+0xbe/0xf0 [ 31.310040] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.310657] vma_interval_tree_remove+0xc75/0xec0 [ 31.311262] vma_prepare+0xc54/0x11a0 [ 31.311746] __split_vma+0x5af/0x950 [ 31.312218] ? __pfx___split_vma+0x10/0x10 [ 31.312752] ? find_held_lock+0x2c/0x110 [ 31.313272] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.313864] ? lock_is_held_type+0x9f/0x120 [ 31.314403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.315015] ? mtree_range_walk+0x632/0x900 [ 31.315564] ? mas_walk+0x5c7/0x7c0 [ 31.316041] do_vmi_munmap+0x1f1/0x2b0 [ 31.316532] mmap_region+0x1f9/0x2660 [ 31.317019] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.317546] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.318262] ? __pfx_lock_acquire+0x10/0x10 [ 31.318799] ? __pfx_mmap_region+0x10/0x10 [ 31.319328] ? security_mmap_addr+0x7d/0xa0 [ 31.319861] ? get_unmapped_area+0x1f5/0x3f0 [ 31.320414] do_mmap+0x854/0xf00 [ 31.320851] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.321349] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.321935] ksys_mmap_pgoff+0x3af/0x500 [ 31.322474] do_syscall_64+0x3f/0x90 [ 31.322954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323611] RIP: 0033:0x7faf876b0d82 [ 31.324075] 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 [ 31.326214] RSP: 002b:00007ffd2d084b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.327116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf876b0d82 [ 31.327967] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf86aea000 [ 31.328816] RBP: 00007faf86aea000 R08: 0000000000000009 R09: 0000000000001000 [ 31.329669] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b1dfe14f70 [ 31.330512] R13: 00007ffd2d084b50 R14: 00007ffd2d084b80 R15: 00007ffd2d084ee0 [ 31.331378] [ 31.331669] [ 31.331887] Allocated by task 213: [ 31.332316] kasan_save_stack+0x22/0x50 [ 31.332832] kasan_set_track+0x25/0x30 [ 31.333327] __kasan_slab_alloc+0x59/0x70 [ 31.333858] kmem_cache_alloc+0x16b/0x370 [ 31.334379] vm_area_dup+0x20/0x160 [ 31.334843] __split_vma+0x170/0x950 [ 31.335310] split_vma+0xc6/0x110 [ 31.335751] mprotect_fixup+0x8d2/0xb30 [ 31.336265] do_mprotect_pkey+0x87e/0xd40 [ 31.336804] __x64_sys_mprotect+0x78/0xc0 [ 31.337330] do_syscall_64+0x3f/0x90 [ 31.337834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.338483] [ 31.338704] Freed by task 210: [ 31.339097] kasan_save_stack+0x22/0x50 [ 31.339601] kasan_set_track+0x25/0x30 [ 31.340104] kasan_save_free_info+0x2b/0x50 [ 31.340644] __kasan_slab_free+0x10a/0x190 [ 31.341184] kmem_cache_free+0x10d/0x4d0 [ 31.341708] rcu_core+0x8c8/0x2860 [ 31.342157] __do_softirq+0x1b7/0x7d4 [ 31.342646] [ 31.342873] Last potentially related work creation: [ 31.343456] kasan_save_stack+0x22/0x50 [ 31.343961] __kasan_record_aux_stack+0x8e/0xa0 [ 31.344534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.345181] remove_vma+0x139/0x170 [ 31.345652] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.346213] do_vmi_munmap+0x1f1/0x2b0 [ 31.346701] __vm_munmap+0x138/0x3a0 [ 31.347169] __x64_sys_munmap+0x59/0x80 [ 31.347672] do_syscall_64+0x3f/0x90 [ 31.348149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.348794] [ 31.349012] Second to last potentially related work creation: [ 31.349713] kasan_save_stack+0x22/0x50 [ 31.350219] __kasan_record_aux_stack+0x8e/0xa0 [ 31.350801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.351446] remove_vma+0x139/0x170 [ 31.351902] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.352459] do_vmi_munmap+0x1f1/0x2b0 [ 31.352945] mmap_region+0x1f9/0x2660 [ 31.353447] do_mmap+0x854/0xf00 [ 31.353888] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.354380] ksys_mmap_pgoff+0x3af/0x500 [ 31.354880] do_syscall_64+0x3f/0x90 [ 31.355352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.355991] [ 31.356206] The buggy address belongs to the object at ffff88800f61e2b8 [ 31.356206] which belongs to the cache vm_area_struct of size 168 [ 31.357690] The buggy address is located 88 bytes inside of [ 31.357690] freed 168-byte region [ffff88800f61e2b8, ffff88800f61e360) [ 31.359101] [ 31.359322] The buggy address belongs to the physical page: [ 31.359983] page:000000007eab3a20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf61e [ 31.361067] memcg:ffff888009545b01 [ 31.361504] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.362203] page_type: 0xffffffff() [ 31.362652] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.363577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009545b01 [ 31.364489] page dumped because: kasan: bad access detected [ 31.365147] [ 31.365365] Memory state around the buggy address: [ 31.365968] ffff88800f61e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.366828] ffff88800f61e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.367675] >ffff88800f61e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.368517] ^ [ 31.368986] ffff88800f61e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.369852] ffff88800f61e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.370708] ================================================================== [ 31.371947] Disabling lock debugging due to kernel taint [ 32.978669] BUG: Bad rss-counter state mm:000000003b641dad type:MM_FILEPAGES val:33 [ 32.979924] BUG: Bad rss-counter state mm:000000003b641dad type:MM_ANONPAGES val:22 [ 33.453019] BUG: Bad rss-counter state mm:00000000bf1fbf91 type:MM_FILEPAGES val:33 [ 33.454148] BUG: Bad rss-counter state mm:00000000bf1fbf91 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51588' (ECDSA) to the list of known hosts. 2023/06/19 11:44:38 fuzzer started 2023/06/19 11:44:38 dialing manager at localhost:44161 2023/06/19 11:44:38 checking machine... 2023/06/19 11:44:38 checking revisions... [ 34.075591] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:44:38 testing simple program... [ 34.103059] cgroup: Unknown subsys name 'net' [ 34.132015] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:44:37 Registers: info registers vcpu 0 RAX=1ffff11001b03c5f RBX=ffff88800d81e2c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d81e2f8 RBP=ffff88800d877ac8 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800d84e780 R14=ffffffff8186b9c5 R15=ffff88800e913d80 RIP=ffffffff81846362 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 00007f3e621a9900 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=00007ffc941d7000 CR3=000000001a096000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fdb8e2c1060 CR3=000000000e41c000 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=2037333a34343a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34343a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000