syzkaller login: [ 34.415704] BUG: Bad rss-counter state mm:00000000b69680d5 type:MM_FILEPAGES val:33 [ 34.416950] BUG: Bad rss-counter state mm:00000000b69680d5 type:MM_ANONPAGES val:22 [ 34.566632] ================================================================== [ 34.567823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.569032] Read of size 8 at addr ffff88801998d798 by task sshd/219 [ 34.570178] [ 34.570460] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.571609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.572912] Call Trace: [ 34.573324] [ 34.573699] dump_stack_lvl+0x91/0xf0 [ 34.574334] print_report+0xcc/0x620 [ 34.574942] ? __virt_addr_valid+0x102/0x340 [ 34.575659] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.576458] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.577247] kasan_report+0xbe/0xf0 [ 34.577863] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.578666] vma_interval_tree_remove+0xc75/0xec0 [ 34.579482] vma_prepare+0xc54/0x11a0 [ 34.580116] __split_vma+0x5af/0x950 [ 34.580726] ? __pfx___split_vma+0x10/0x10 [ 34.581401] ? find_held_lock+0x2c/0x110 [ 34.582079] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.582819] ? lock_is_held_type+0x9f/0x120 [ 34.583525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.584327] ? mtree_range_walk+0x632/0x900 [ 34.585040] ? mas_walk+0x5c7/0x7c0 [ 34.585658] do_vmi_munmap+0x1f1/0x2b0 [ 34.586303] mmap_region+0x1f9/0x2660 [ 34.586927] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.587625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.588566] ? __pfx_lock_acquire+0x10/0x10 [ 34.589253] ? __pfx_mmap_region+0x10/0x10 [ 34.589931] ? security_mmap_addr+0x7d/0xa0 [ 34.590614] ? get_unmapped_area+0x1f5/0x3f0 [ 34.591331] do_mmap+0x854/0xf00 [ 34.591900] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.592546] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.593283] ksys_mmap_pgoff+0x3af/0x500 [ 34.593947] do_syscall_64+0x3f/0x90 [ 34.594569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.595418] RIP: 0033:0x7f4f532d8d82 [ 34.596009] 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 [ 34.598771] RSP: 002b:00007ffdfdf78a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.599981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f532d8d82 [ 34.601086] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f52712000 [ 34.602191] RBP: 00007f4f52712000 R08: 0000000000000009 R09: 0000000000001000 [ 34.603306] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b685e5eb20 [ 34.604419] R13: 00007ffdfdf78aa0 R14: 00007ffdfdf78ad0 R15: 00007ffdfdf78e30 [ 34.605546] [ 34.605915] [ 34.606203] Allocated by task 212: [ 34.606762] kasan_save_stack+0x22/0x50 [ 34.607433] kasan_set_track+0x25/0x30 [ 34.608085] __kasan_slab_alloc+0x59/0x70 [ 34.608758] kmem_cache_alloc+0x16b/0x370 [ 34.609430] vm_area_dup+0x20/0x160 [ 34.610018] __split_vma+0x170/0x950 [ 34.610617] split_vma+0xc6/0x110 [ 34.611175] mprotect_fixup+0x8d2/0xb30 [ 34.611841] do_mprotect_pkey+0x87e/0xd40 [ 34.612521] __x64_sys_mprotect+0x78/0xc0 [ 34.613191] do_syscall_64+0x3f/0x90 [ 34.613816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.614658] [ 34.614929] Freed by task 212: [ 34.615447] kasan_save_stack+0x22/0x50 [ 34.616095] kasan_set_track+0x25/0x30 [ 34.616720] kasan_save_free_info+0x2b/0x50 [ 34.617408] __kasan_slab_free+0x10a/0x190 [ 34.618113] kmem_cache_free+0x10d/0x4d0 [ 34.618784] rcu_core+0x8c8/0x2860 [ 34.619380] __do_softirq+0x1b7/0x7d4 [ 34.619997] [ 34.620281] Last potentially related work creation: [ 34.621043] kasan_save_stack+0x22/0x50 [ 34.621695] __kasan_record_aux_stack+0x8e/0xa0 [ 34.622441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.623278] remove_vma+0x139/0x170 [ 34.623864] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.624589] do_vmi_munmap+0x1f1/0x2b0 [ 34.625212] __vm_munmap+0x138/0x3a0 [ 34.625821] __x64_sys_munmap+0x59/0x80 [ 34.626459] do_syscall_64+0x3f/0x90 [ 34.627075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.627777] [ 34.628005] The buggy address belongs to the object at ffff88801998d740 [ 34.628005] which belongs to the cache vm_area_struct of size 168 [ 34.629474] The buggy address is located 88 bytes inside of [ 34.629474] freed 168-byte region [ffff88801998d740, ffff88801998d7e8) [ 34.630870] [ 34.631089] The buggy address belongs to the physical page: [ 34.631767] page:000000001d11fb23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1998d [ 34.632874] memcg:ffff8880178d6d01 [ 34.633320] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.633994] page_type: 0xffffffff() [ 34.634475] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.635449] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880178d6d01 [ 34.636414] page dumped because: kasan: bad access detected [ 34.637104] [ 34.637330] Memory state around the buggy address: [ 34.637939] ffff88801998d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.638833] ffff88801998d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.639773] >ffff88801998d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.640661] ^ [ 34.641184] ffff88801998d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.642087] ffff88801998d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.642983] ================================================================== [ 34.644057] Disabling lock debugging due to kernel taint [ 36.560379] BUG: Bad rss-counter state mm:000000005a079997 type:MM_FILEPAGES val:33 [ 36.561630] BUG: Bad rss-counter state mm:000000005a079997 type:MM_ANONPAGES val:22 [ 37.019411] BUG: Bad rss-counter state mm:00000000b162e554 type:MM_FILEPAGES val:33 [ 37.020672] BUG: Bad rss-counter state mm:00000000b162e554 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27850' (ECDSA) to the list of known hosts. 2023/06/19 16:10:28 fuzzer started 2023/06/19 16:10:28 dialing manager at localhost:44161 2023/06/19 16:10:28 checking machine... 2023/06/19 16:10:28 checking revisions... [ 37.723305] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:10:28 testing simple program... [ 37.764386] cgroup: Unknown subsys name 'net' [ 37.803879] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:10:25 Registers: info registers vcpu 0 RAX=ffff88800ecb4658 RBX=ffff8880183e2658 RCX=1ffff11002b4fad2 RDX=dffffc0000000000 RSI=ffff8880192472d8 RDI=ffff8880183e2688 RBP=ffff8880183e2668 RSP=ffff888015847c58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880192471a0 R13=0000000000000000 R14=ffff88801bfa32a8 R15=ffff88801bfa3260 RIP=ffffffff8184754c 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 00007f8275291900 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=00007f8275848618 CR3=0000000017a2a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff814c07e0 RDX=dffffc0000000000 RSI=0000000000004c07 RDI=ffff88801479fb50 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130754 RFL=00000283 [--S---C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd3b6205900 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=00007fd3b5612640 CR3=000000000d698000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a842b3743d26443e00000000000ae988 XMM05=43dc654ca224fe5c0000000000135388 XMM06=806171799158d9670000000000134178 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000