syzkaller login: [ 36.459231] BUG: Bad rss-counter state mm:00000000947bbc6a type:MM_FILEPAGES val:33 [ 36.460537] BUG: Bad rss-counter state mm:00000000947bbc6a type:MM_ANONPAGES val:22 [ 36.501330] ================================================================== [ 36.502298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.503230] Read of size 8 at addr ffff88800ead7968 by task sshd/221 [ 36.504324] [ 36.504558] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.505621] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.506687] Call Trace: [ 36.507083] [ 36.507371] dump_stack_lvl+0x91/0xf0 [ 36.507962] print_report+0xcc/0x620 [ 36.508535] ? __virt_addr_valid+0x102/0x340 [ 36.509239] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.509847] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.510461] kasan_report+0xbe/0xf0 [ 36.510929] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.511558] vma_interval_tree_remove+0xc75/0xec0 [ 36.512160] vma_prepare+0xc54/0x11a0 [ 36.512636] __split_vma+0x5af/0x950 [ 36.513099] ? __pfx___split_vma+0x10/0x10 [ 36.513630] ? find_held_lock+0x2c/0x110 [ 36.514154] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.514707] ? lock_is_held_type+0x9f/0x120 [ 36.515253] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.515851] ? mtree_range_walk+0x632/0x900 [ 36.516395] ? mas_walk+0x5c7/0x7c0 [ 36.516866] do_vmi_munmap+0x1f1/0x2b0 [ 36.517350] mmap_region+0x1f9/0x2660 [ 36.517827] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.518331] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.519037] ? __pfx_lock_acquire+0x10/0x10 [ 36.519568] ? __pfx_mmap_region+0x10/0x10 [ 36.520087] ? security_mmap_addr+0x7d/0xa0 [ 36.520617] ? get_unmapped_area+0x1f5/0x3f0 [ 36.521156] do_mmap+0x854/0xf00 [ 36.521590] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.522076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.522632] ksys_mmap_pgoff+0x3af/0x500 [ 36.523134] do_syscall_64+0x3f/0x90 [ 36.523608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.524254] RIP: 0033:0x7fca5a4e7d82 [ 36.524708] 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 [ 36.526796] RSP: 002b:00007ffd2cb228c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.527708] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca5a4e7d82 [ 36.528549] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca59921000 [ 36.529385] RBP: 00007fca59921000 R08: 0000000000000009 R09: 0000000000001000 [ 36.530219] R10: 0000000000000812 R11: 0000000000000206 R12: 000055815aaa0ec0 [ 36.531051] R13: 00007ffd2cb228e0 R14: 00007ffd2cb22910 R15: 00007ffd2cb22c70 [ 36.531907] [ 36.532194] [ 36.532408] Allocated by task 213: [ 36.532830] kasan_save_stack+0x22/0x50 [ 36.533329] kasan_set_track+0x25/0x30 [ 36.533819] __kasan_slab_alloc+0x59/0x70 [ 36.534336] kmem_cache_alloc+0x16b/0x370 [ 36.534842] vm_area_dup+0x20/0x160 [ 36.535305] __split_vma+0x170/0x950 [ 36.535763] split_vma+0xc6/0x110 [ 36.536197] mprotect_fixup+0x8d2/0xb30 [ 36.536705] do_mprotect_pkey+0x87e/0xd40 [ 36.537225] __x64_sys_mprotect+0x78/0xc0 [ 36.537740] do_syscall_64+0x3f/0x90 [ 36.538208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.538838] [ 36.539051] Freed by task 213: [ 36.539461] kasan_save_stack+0x22/0x50 [ 36.539955] kasan_set_track+0x25/0x30 [ 36.540445] kasan_save_free_info+0x2b/0x50 [ 36.540978] __kasan_slab_free+0x10a/0x190 [ 36.541503] kmem_cache_free+0x10d/0x4d0 [ 36.542003] rcu_core+0x8c8/0x2860 [ 36.542445] __do_softirq+0x1b7/0x7d4 [ 36.542921] [ 36.543136] Last potentially related work creation: [ 36.543721] kasan_save_stack+0x22/0x50 [ 36.544215] __kasan_record_aux_stack+0x8e/0xa0 [ 36.544787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.545421] remove_vma+0x139/0x170 [ 36.545923] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.546472] do_vmi_munmap+0x1f1/0x2b0 [ 36.546949] __vm_munmap+0x138/0x3a0 [ 36.547437] __x64_sys_munmap+0x59/0x80 [ 36.547929] do_syscall_64+0x3f/0x90 [ 36.548394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.549026] [ 36.549242] The buggy address belongs to the object at ffff88800ead7910 [ 36.549242] which belongs to the cache vm_area_struct of size 168 [ 36.550704] The buggy address is located 88 bytes inside of [ 36.550704] freed 168-byte region [ffff88800ead7910, ffff88800ead79b8) [ 36.552105] [ 36.552318] The buggy address belongs to the physical page: [ 36.552969] page:00000000f672b390 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xead7 [ 36.554038] memcg:ffff88800ebee201 [ 36.554459] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.555097] page_type: 0xffffffff() [ 36.555562] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.556472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebee201 [ 36.557377] page dumped because: kasan: bad access detected [ 36.558027] [ 36.558241] Memory state around the buggy address: [ 36.558812] ffff88800ead7800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.559663] ffff88800ead7880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.560507] >ffff88800ead7900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.561344] ^ [ 36.562119] ffff88800ead7980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.562967] ffff88800ead7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.563816] ================================================================== [ 36.564732] Disabling lock debugging due to kernel taint [ 38.693342] BUG: Bad rss-counter state mm:00000000dab2ba9b type:MM_FILEPAGES val:33 [ 38.694145] BUG: Bad rss-counter state mm:00000000dab2ba9b type:MM_ANONPAGES val:22 [ 39.103668] BUG: Bad rss-counter state mm:000000004ab6404f type:MM_FILEPAGES val:33 [ 39.104731] BUG: Bad rss-counter state mm:000000004ab6404f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52100' (ECDSA) to the list of known hosts. 2023/06/19 12:01:05 fuzzer started 2023/06/19 12:01:06 dialing manager at localhost:44161 2023/06/19 12:01:06 checking machine... 2023/06/19 12:01:06 checking revisions... [ 39.791800] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:01:06 testing simple program... [ 39.845196] cgroup: Unknown subsys name 'net' [ 39.880647] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:01:00 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00007f80dfadc366 RCX=ffffffff813a0a8d RDX=ffffffffffffffff RSI=00007f80dfadc366 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88800fcaf5e0 R8 =0000000000000006 R9 =00007f80dfadc366 R10=ffffffffffffffff R11=00000000000b6996 R12=ffff88800fcaf720 R13=0000000000000000 R14=ffff888016ef1b40 R15=0000000000092cc0 RIP=ffffffff814c01d0 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f80df5e9900 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=00007ffd8faf9000 CR3=000000000e2a0000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffff888008c58400 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=00007faf691558d0 CR3=000000000c90a000 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=858aadd26f8142a30846cf3fee2549d9 XMM02=ec2efd57dc4c00df000000000011d388 XMM03=2ffc322453e75d76000000000011d458 XMM04=448566b2d13b385b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134518 XMM06=e9debb948ce9bb5d0000000000133380 XMM07=e042d86d42eb936e0000000000124bf0 XMM08=2ffc322453e75d76000000000011d458 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000