syzkaller login: [ 61.364268] BUG: Bad rss-counter state mm:00000000405e9b08 type:MM_FILEPAGES val:33 [ 61.365696] BUG: Bad rss-counter state mm:00000000405e9b08 type:MM_ANONPAGES val:22 [ 61.511440] ================================================================== [ 61.512354] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.513306] Read of size 8 at addr ffff888019c1c798 by task sshd/219 [ 61.514261] [ 61.514500] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.515389] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.516365] Call Trace: [ 61.516683] [ 61.516995] dump_stack_lvl+0x91/0xf0 [ 61.517487] print_report+0xcc/0x620 [ 61.517983] ? __virt_addr_valid+0x102/0x340 [ 61.518562] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.519192] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.519814] kasan_report+0xbe/0xf0 [ 61.520293] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.520914] vma_interval_tree_remove+0xc75/0xec0 [ 61.521521] vma_prepare+0xc54/0x11a0 [ 61.522005] __split_vma+0x5af/0x950 [ 61.522482] ? __pfx___split_vma+0x10/0x10 [ 61.523007] ? find_held_lock+0x2c/0x110 [ 61.523533] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.524103] ? lock_is_held_type+0x9f/0x120 [ 61.524639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.525249] ? mtree_range_walk+0x632/0x900 [ 61.525818] ? mas_walk+0x5c7/0x7c0 [ 61.526306] do_vmi_munmap+0x1f1/0x2b0 [ 61.526795] mmap_region+0x1f9/0x2660 [ 61.527279] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.527787] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.528528] ? __pfx_lock_acquire+0x10/0x10 [ 61.529062] ? __pfx_mmap_region+0x10/0x10 [ 61.529594] ? security_mmap_addr+0x7d/0xa0 [ 61.530151] ? get_unmapped_area+0x1f5/0x3f0 [ 61.530703] do_mmap+0x854/0xf00 [ 61.531152] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.531650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.532226] ksys_mmap_pgoff+0x3af/0x500 [ 61.532746] do_syscall_64+0x3f/0x90 [ 61.533222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.533892] RIP: 0033:0x7f8e88060d82 [ 61.534373] 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 [ 61.536537] RSP: 002b:00007fff0f197718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.537469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e88060d82 [ 61.538350] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e8749a000 [ 61.539248] RBP: 00007f8e8749a000 R08: 0000000000000009 R09: 0000000000001000 [ 61.540097] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633adc09ec0 [ 61.540948] R13: 00007fff0f197730 R14: 00007fff0f197760 R15: 00007fff0f197ac0 [ 61.541814] [ 61.542119] [ 61.542333] Allocated by task 212: [ 61.542763] kasan_save_stack+0x22/0x50 [ 61.543279] kasan_set_track+0x25/0x30 [ 61.543771] __kasan_slab_alloc+0x59/0x70 [ 61.544299] kmem_cache_alloc+0x16b/0x370 [ 61.544820] vm_area_dup+0x20/0x160 [ 61.545282] __split_vma+0x170/0x950 [ 61.545775] split_vma+0xc6/0x110 [ 61.546221] mprotect_fixup+0x8d2/0xb30 [ 61.546724] do_mprotect_pkey+0x87e/0xd40 [ 61.547246] __x64_sys_mprotect+0x78/0xc0 [ 61.547766] do_syscall_64+0x3f/0x90 [ 61.548249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.548900] [ 61.549117] Freed by task 212: [ 61.549508] kasan_save_stack+0x22/0x50 [ 61.550036] kasan_set_track+0x25/0x30 [ 61.550529] kasan_save_free_info+0x2b/0x50 [ 61.551068] __kasan_slab_free+0x10a/0x190 [ 61.551598] kmem_cache_free+0x10d/0x4d0 [ 61.552115] rcu_core+0x8c8/0x2860 [ 61.552564] __do_softirq+0x1b7/0x7d4 [ 61.553042] [ 61.553257] Last potentially related work creation: [ 61.553843] kasan_save_stack+0x22/0x50 [ 61.554356] __kasan_record_aux_stack+0x8e/0xa0 [ 61.554943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.555657] remove_vma+0x139/0x170 [ 61.556118] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.556679] do_vmi_munmap+0x1f1/0x2b0 [ 61.557169] __vm_munmap+0x138/0x3a0 [ 61.557638] __x64_sys_munmap+0x59/0x80 [ 61.558153] do_syscall_64+0x3f/0x90 [ 61.558626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.559264] [ 61.559480] The buggy address belongs to the object at ffff888019c1c740 [ 61.559480] which belongs to the cache vm_area_struct of size 168 [ 61.560960] The buggy address is located 88 bytes inside of [ 61.560960] freed 168-byte region [ffff888019c1c740, ffff888019c1c7e8) [ 61.562391] [ 61.562608] The buggy address belongs to the physical page: [ 61.563272] page:000000000b99bb19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c1c [ 61.564381] memcg:ffff888019f9b901 [ 61.564808] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.565456] page_type: 0xffffffff() [ 61.565906] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.566839] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f9b901 [ 61.567760] page dumped because: kasan: bad access detected [ 61.568419] [ 61.568633] Memory state around the buggy address: [ 61.569211] ffff888019c1c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.570093] ffff888019c1c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.570987] >ffff888019c1c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.571895] ^ [ 61.572425] ffff888019c1c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.573322] ffff888019c1c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.574234] ================================================================== [ 61.575375] Disabling lock debugging due to kernel taint [ 63.461130] BUG: Bad rss-counter state mm:000000001872c9f9 type:MM_FILEPAGES val:33 [ 63.462362] BUG: Bad rss-counter state mm:000000001872c9f9 type:MM_ANONPAGES val:22 [ 64.010396] BUG: Bad rss-counter state mm:000000000197e217 type:MM_FILEPAGES val:33 [ 64.011556] BUG: Bad rss-counter state mm:000000000197e217 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55117' (ECDSA) to the list of known hosts. 2023/06/20 07:03:31 fuzzer started 2023/06/20 07:03:32 dialing manager at localhost:44161 2023/06/20 07:03:32 checking machine... 2023/06/20 07:03:32 checking revisions... [ 64.670146] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:03:32 testing simple program... [ 64.724503] cgroup: Unknown subsys name 'net' [ 64.777646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:03:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001255 RCX=0000000000000000 RDX=ffff888016b80000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff888016577658 RSP=ffff888017ccfe70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=00007fd20be230b0 R14=ffff888016577668 R15=ffff88800845d340 RIP=ffffffff814c0380 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd20b86b900 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=00007fd20be230b0 CR3=000000000dcd0000 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=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=00007f9a2ed198b0 CR3=000000000e018000 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=985b4b0992b18eb40a449b77c159eaf7 XMM02=000000000011fc00ec2efd57dc4c00df XMM03=00000000001242e80fc02fd359ef09bf XMM04=cac89739f8cc628300000000000ae988 XMM05=dfcdbad4f1609c370000000000133e70 XMM06=6f2746e4cfaa7b960000000000132cd8 XMM07=e042d86d42eb936e0000000000124568 XMM08=0fc02fd359ef09bf000000000011fc60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000