syzkaller login: [ 100.882825] BUG: Bad rss-counter state mm:00000000cf512f36 type:MM_FILEPAGES val:33 [ 100.884296] BUG: Bad rss-counter state mm:00000000cf512f36 type:MM_ANONPAGES val:22 [ 101.049890] ================================================================== [ 101.051013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 101.052152] Read of size 8 at addr ffff888009790a50 by task sshd/220 [ 101.053283] [ 101.053508] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 101.054559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 101.055587] Call Trace: [ 101.055911] [ 101.056209] dump_stack_lvl+0x91/0xf0 [ 101.056724] print_report+0xcc/0x620 [ 101.057228] ? __virt_addr_valid+0x102/0x340 [ 101.057790] ? vma_interval_tree_remove+0xc75/0xec0 [ 101.058454] ? vma_interval_tree_remove+0xc75/0xec0 [ 101.059076] kasan_report+0xbe/0xf0 [ 101.059576] ? vma_interval_tree_remove+0xc75/0xec0 [ 101.060222] vma_interval_tree_remove+0xc75/0xec0 [ 101.060838] vma_prepare+0xc54/0x11a0 [ 101.061337] __split_vma+0x5af/0x950 [ 101.061808] ? __pfx___split_vma+0x10/0x10 [ 101.062353] ? find_held_lock+0x2c/0x110 [ 101.062868] do_vmi_align_munmap+0x2ba/0x11f0 [ 101.063463] ? lock_is_held_type+0x9f/0x120 [ 101.064005] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 101.064654] ? mtree_range_walk+0x632/0x900 [ 101.065225] ? mas_walk+0x5c7/0x7c0 [ 101.065697] do_vmi_munmap+0x1f1/0x2b0 [ 101.066204] mmap_region+0x1f9/0x2660 [ 101.066690] ? vm_mmap_pgoff+0x15c/0x3a0 [ 101.067218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 101.067923] ? __pfx_lock_acquire+0x10/0x10 [ 101.068480] ? __pfx_mmap_region+0x10/0x10 [ 101.069017] ? security_mmap_addr+0x7d/0xa0 [ 101.069564] ? get_unmapped_area+0x1f5/0x3f0 [ 101.070119] do_mmap+0x854/0xf00 [ 101.070576] vm_mmap_pgoff+0x1a6/0x3a0 [ 101.071068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 101.071641] ksys_mmap_pgoff+0x3af/0x500 [ 101.072162] do_syscall_64+0x3f/0x90 [ 101.072671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 101.073361] RIP: 0033:0x7fd33119fd82 [ 101.073816] 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 [ 101.075971] RSP: 002b:00007fff2570ca58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 101.076898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd33119fd82 [ 101.077791] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3305d9000 [ 101.078664] RBP: 00007fd3305d9000 R08: 0000000000000009 R09: 0000000000001000 [ 101.079533] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd023bdec0 [ 101.080436] R13: 00007fff2570ca70 R14: 00007fff2570caa0 R15: 00007fff2570ce00 [ 101.081309] [ 101.081613] [ 101.081828] Allocated by task 213: [ 101.082280] kasan_save_stack+0x22/0x50 [ 101.082795] kasan_set_track+0x25/0x30 [ 101.083320] __kasan_slab_alloc+0x59/0x70 [ 101.083857] kmem_cache_alloc+0x16b/0x370 [ 101.084416] vm_area_dup+0x20/0x160 [ 101.084878] __split_vma+0x170/0x950 [ 101.085372] split_vma+0xc6/0x110 [ 101.085820] mprotect_fixup+0x8d2/0xb30 [ 101.086352] do_mprotect_pkey+0x87e/0xd40 [ 101.086888] __x64_sys_mprotect+0x78/0xc0 [ 101.087432] do_syscall_64+0x3f/0x90 [ 101.087911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 101.088584] [ 101.088802] Freed by task 213: [ 101.089210] kasan_save_stack+0x22/0x50 [ 101.089714] kasan_set_track+0x25/0x30 [ 101.090234] kasan_save_free_info+0x2b/0x50 [ 101.090768] __kasan_slab_free+0x10a/0x190 [ 101.091317] kmem_cache_free+0x10d/0x4d0 [ 101.091837] rcu_core+0x8c8/0x2860 [ 101.092298] __do_softirq+0x1b7/0x7d4 [ 101.092785] [ 101.092999] Last potentially related work creation: [ 101.093607] kasan_save_stack+0x22/0x50 [ 101.094111] __kasan_record_aux_stack+0x8e/0xa0 [ 101.094715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 101.095381] remove_vma+0x139/0x170 [ 101.095836] do_vmi_align_munmap+0xd4a/0x11f0 [ 101.096424] do_vmi_munmap+0x1f1/0x2b0 [ 101.096909] __vm_munmap+0x138/0x3a0 [ 101.097392] __x64_sys_munmap+0x59/0x80 [ 101.097884] do_syscall_64+0x3f/0x90 [ 101.098368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 101.099004] [ 101.099243] Second to last potentially related work creation: [ 101.099920] kasan_save_stack+0x22/0x50 [ 101.100448] __kasan_record_aux_stack+0x8e/0xa0 [ 101.101022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 101.101690] remove_vma+0x139/0x170 [ 101.102145] do_vmi_align_munmap+0xd4a/0x11f0 [ 101.102726] do_vmi_munmap+0x1f1/0x2b0 [ 101.103237] mmap_region+0x1f9/0x2660 [ 101.103715] do_mmap+0x854/0xf00 [ 101.104162] vm_mmap_pgoff+0x1a6/0x3a0 [ 101.104687] ksys_mmap_pgoff+0x3af/0x500 [ 101.105227] do_syscall_64+0x3f/0x90 [ 101.105704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 101.106371] [ 101.106590] The buggy address belongs to the object at ffff8880097909f8 [ 101.106590] which belongs to the cache vm_area_struct of size 168 [ 101.108065] The buggy address is located 88 bytes inside of [ 101.108065] freed 168-byte region [ffff8880097909f8, ffff888009790aa0) [ 101.109523] [ 101.109741] The buggy address belongs to the physical page: [ 101.110412] page:000000001d66062e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9790 [ 101.111520] memcg:ffff88800d749401 [ 101.111949] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 101.112676] page_type: 0xffffffff() [ 101.113127] raw: 0100000000000200 ffff88800879fc80 ffffea00003be980 dead000000000007 [ 101.114065] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d749401 [ 101.115001] page dumped because: kasan: bad access detected [ 101.115674] [ 101.115890] Memory state around the buggy address: [ 101.116499] ffff888009790900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 101.117388] ffff888009790980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 101.118271] >ffff888009790a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 101.119123] ^ [ 101.119848] ffff888009790a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 101.120729] ffff888009790b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 101.121599] ================================================================== [ 101.122569] Disabling lock debugging due to kernel taint [ 102.949373] BUG: Bad rss-counter state mm:00000000d25e1a0e type:MM_FILEPAGES val:33 [ 102.950082] BUG: Bad rss-counter state mm:00000000d25e1a0e type:MM_ANONPAGES val:22 [ 103.401319] BUG: Bad rss-counter state mm:00000000b74e538d type:MM_FILEPAGES val:33 [ 103.402297] BUG: Bad rss-counter state mm:00000000b74e538d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59939' (ECDSA) to the list of known hosts. 2023/06/19 14:56:52 fuzzer started 2023/06/19 14:56:52 dialing manager at localhost:44161 2023/06/19 14:56:52 checking machine... 2023/06/19 14:56:52 checking revisions... [ 104.101950] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:56:52 testing simple program... [ 104.142203] cgroup: Unknown subsys name 'net' [ 104.178256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:55:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800efd8000 RCX=ffff8880084c6140 RDX=ffffea000035fc80 RSI=ffff88800d7f2e00 RDI=ffff8880084c6140 RBP=0000000000000000 RSP=ffff88801659fa38 R8 =ffff88800d7f2a00 R9 =0000000000000000 R10=ffffea000035fc80 R11=000000000010000d R12=dffffc0000000000 R13=ffff88801659fa78 R14=ffff8880084c6140 R15=ffff88800d7f2e00 RIP=ffffffff81810196 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 00007f22305cf900 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=00007ffc38359000 CR3=000000000ea28000 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=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=00007f98bf95b3b0 CR3=000000000f492000 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=5ea01c9e60c40fb36b46ff567ef5db4a XMM02=0000000000128860ec2efd57dc4c00df XMM03=000000000012cf3078388267824795f4 XMM04=48640876a6b14c3f00000000000ae988 XMM05=19e9129bd510f235000000000013dbf0 XMM06=3ff3fe1f7ee9df87000000000013ca58 XMM07=e042d86d42eb936e000000000012d1b0 XMM08=78388267824795f400000000001288c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000