syzkaller login: [ 29.527390] BUG: Bad rss-counter state mm:000000000d5ea8d8 type:MM_FILEPAGES val:33 [ 29.528821] BUG: Bad rss-counter state mm:000000000d5ea8d8 type:MM_ANONPAGES val:22 [ 29.529710] ================================================================== [ 29.531038] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.531995] Read of size 8 at addr ffff88800e31eed8 by task sshd/219 [ 29.532814] [ 29.533040] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.533933] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.534916] Call Trace: [ 29.535273] [ 29.535564] dump_stack_lvl+0x91/0xf0 [ 29.536066] print_report+0xcc/0x620 [ 29.536587] ? __virt_addr_valid+0x102/0x340 [ 29.537149] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.537810] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.538444] kasan_report+0xbe/0xf0 [ 29.538925] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.539591] vma_interval_tree_remove+0xc75/0xec0 [ 29.540230] vma_prepare+0xc54/0x11a0 [ 29.540755] __split_vma+0x5af/0x950 [ 29.541238] ? __pfx___split_vma+0x10/0x10 [ 29.541884] ? find_held_lock+0x2c/0x110 [ 29.542418] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.542984] ? lock_is_held_type+0x9f/0x120 [ 29.543592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.544223] ? mtree_range_walk+0x632/0x900 [ 29.544816] ? mas_walk+0x5c7/0x7c0 [ 29.545295] do_vmi_munmap+0x1f1/0x2b0 [ 29.545814] mmap_region+0x1f9/0x2660 [ 29.546310] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.546838] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.547580] ? __pfx_lock_acquire+0x10/0x10 [ 29.548144] ? __pfx_mmap_region+0x10/0x10 [ 29.548684] ? security_mmap_addr+0x7d/0xa0 [ 29.549264] ? get_unmapped_area+0x1f5/0x3f0 [ 29.549821] do_mmap+0x854/0xf00 [ 29.550268] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.550765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.551380] ksys_mmap_pgoff+0x3af/0x500 [ 29.551896] do_syscall_64+0x3f/0x90 [ 29.552384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.553073] RIP: 0033:0x7fabafec2d82 [ 29.553532] 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 [ 29.555748] RSP: 002b:00007ffcd7784a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.556661] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabafec2d82 [ 29.557551] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabaf2fc000 [ 29.558413] RBP: 00007fabaf2fc000 R08: 0000000000000009 R09: 0000000000001000 [ 29.559303] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d59138d90 [ 29.560174] R13: 00007ffcd7784aa0 R14: 00007ffcd7784ad0 R15: 00007ffcd7784e30 [ 29.561081] [ 29.561374] [ 29.561589] Allocated by task 212: [ 29.562056] kasan_save_stack+0x22/0x50 [ 29.562568] kasan_set_track+0x25/0x30 [ 29.563071] __kasan_slab_alloc+0x59/0x70 [ 29.563639] kmem_cache_alloc+0x16b/0x370 [ 29.564168] vm_area_dup+0x20/0x160 [ 29.564622] __split_vma+0x170/0x950 [ 29.565133] split_vma+0xc6/0x110 [ 29.565576] mprotect_fixup+0x8d2/0xb30 [ 29.566132] do_mprotect_pkey+0x87e/0xd40 [ 29.566660] __x64_sys_mprotect+0x78/0xc0 [ 29.567193] do_syscall_64+0x3f/0x90 [ 29.567709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.568367] [ 29.568582] Freed by task 212: [ 29.569008] kasan_save_stack+0x22/0x50 [ 29.569526] kasan_set_track+0x25/0x30 [ 29.570029] kasan_save_free_info+0x2b/0x50 [ 29.570564] __kasan_slab_free+0x10a/0x190 [ 29.571140] kmem_cache_free+0x10d/0x4d0 [ 29.571699] rcu_core+0x8c8/0x2860 [ 29.572157] __do_softirq+0x1b7/0x7d4 [ 29.572644] [ 29.572861] Last potentially related work creation: [ 29.573448] kasan_save_stack+0x22/0x50 [ 29.573966] __kasan_record_aux_stack+0x8e/0xa0 [ 29.574582] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.575224] remove_vma+0x139/0x170 [ 29.575741] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.576311] do_vmi_munmap+0x1f1/0x2b0 [ 29.576793] __vm_munmap+0x138/0x3a0 [ 29.577260] __x64_sys_munmap+0x59/0x80 [ 29.577804] do_syscall_64+0x3f/0x90 [ 29.578287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.578943] [ 29.579159] Second to last potentially related work creation: [ 29.579909] kasan_save_stack+0x22/0x50 [ 29.580417] __kasan_record_aux_stack+0x8e/0xa0 [ 29.581041] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.581693] remove_vma+0x139/0x170 [ 29.582184] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.582771] do_vmi_munmap+0x1f1/0x2b0 [ 29.583264] mmap_region+0x1f9/0x2660 [ 29.583763] do_mmap+0x854/0xf00 [ 29.584199] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.584686] ksys_mmap_pgoff+0x3af/0x500 [ 29.585204] do_syscall_64+0x3f/0x90 [ 29.585681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.586322] [ 29.586541] The buggy address belongs to the object at ffff88800e31ee80 [ 29.586541] which belongs to the cache vm_area_struct of size 168 [ 29.588026] The buggy address is located 88 bytes inside of [ 29.588026] freed 168-byte region [ffff88800e31ee80, ffff88800e31ef28) [ 29.589430] [ 29.589653] The buggy address belongs to the physical page: [ 29.590322] page:000000000807c7e3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe31e [ 29.591414] memcg:ffff88800e48d301 [ 29.591846] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.592492] page_type: 0xffffffff() [ 29.593005] raw: 0100000000000200 ffff88800879fc80 ffffea00003de7c0 dead000000000006 [ 29.594010] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e48d301 [ 29.594924] page dumped because: kasan: bad access detected [ 29.595588] [ 29.595820] Memory state around the buggy address: [ 29.596406] ffff88800e31ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.597271] ffff88800e31ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.598128] >ffff88800e31ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.598989] ^ [ 29.599722] ffff88800e31ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.600578] ffff88800e31ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.601429] ================================================================== [ 29.602429] Disabling lock debugging due to kernel taint [ 31.487706] BUG: Bad rss-counter state mm:00000000d67ab22f type:MM_FILEPAGES val:33 [ 31.488906] BUG: Bad rss-counter state mm:00000000d67ab22f type:MM_ANONPAGES val:22 [ 31.946472] BUG: Bad rss-counter state mm:0000000063fde0fe type:MM_FILEPAGES val:33 [ 31.947491] BUG: Bad rss-counter state mm:0000000063fde0fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32840' (ECDSA) to the list of known hosts. 2023/06/19 22:23:54 fuzzer started 2023/06/19 22:23:54 dialing manager at localhost:44161 2023/06/19 22:23:54 checking machine... 2023/06/19 22:23:54 checking revisions... [ 32.667154] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:23:54 testing simple program... [ 32.711605] cgroup: Unknown subsys name 'net' [ 32.761091] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:23:53 Registers: info registers vcpu 0 RAX=ffffffff86137009 RBX=0000000000000001 RCX=ffffffff86137004 RDX=0000000000000000 RSI=1ffffffff0c26e01 RDI=ffffffff85dfc6a4 RBP=ffff888015f6f8d8 RSP=ffff888015f6f810 R8 =ffffffff86137004 R9 =ffff888015f6f8c0 R10=0000000000038001 R11=0000000000020cb4 R12=ffff888015f6f8e0 R13=ffff888015f6f8c8 R14=ffff888015f6f8c1 R15=ffff888015f6f880 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007f8487495900 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=00007f8487a4a650 CR3=0000000009a3a000 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=00007f2872fb6130 CR3=000000000c818000 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=b7af0a8625f0f8b6844f06fa856ef1e8 XMM02=000000000011db20eff9b2d0a8fce9cb XMM03=000000000011dbf02c67c8bc2e329bc3 XMM04=27ce5d76c62a4e9700000000000ae988 XMM05=6e37a594b44b857d0000000000136610 XMM06=4fda316b135da52b00000000001356b0 XMM07=e042d86d42eb936e0000000000124420 XMM08=a8e98c0fd0e433f6000000000011dbf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000