syzkaller login: [ 30.268063] BUG: Bad rss-counter state mm:00000000260172d1 type:MM_FILEPAGES val:33 [ 30.269051] BUG: Bad rss-counter state mm:00000000260172d1 type:MM_ANONPAGES val:22 [ 30.445952] ================================================================== [ 30.446870] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.447804] Read of size 8 at addr ffff888016cd9968 by task sshd/220 [ 30.448571] [ 30.448785] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.449740] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.450735] Call Trace: [ 30.451052] <TASK> [ 30.451335] dump_stack_lvl+0x91/0xf0 [ 30.451823] print_report+0xcc/0x620 [ 30.452304] ? __virt_addr_valid+0x102/0x340 [ 30.452852] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.453461] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.454074] kasan_report+0xbe/0xf0 [ 30.454563] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.455181] vma_interval_tree_remove+0xc75/0xec0 [ 30.455787] vma_prepare+0xc54/0x11a0 [ 30.456270] __split_vma+0x5af/0x950 [ 30.456745] ? __pfx___split_vma+0x10/0x10 [ 30.457281] ? find_held_lock+0x2c/0x110 [ 30.457804] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.458384] ? lock_is_held_type+0x9f/0x120 [ 30.458926] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.459539] ? mtree_range_walk+0x632/0x900 [ 30.460095] ? mas_walk+0x5c7/0x7c0 [ 30.460571] do_vmi_munmap+0x1f1/0x2b0 [ 30.461072] mmap_region+0x1f9/0x2660 [ 30.461553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.462064] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.462809] ? __pfx_lock_acquire+0x10/0x10 [ 30.463342] ? __pfx_mmap_region+0x10/0x10 [ 30.463884] ? security_mmap_addr+0x7d/0xa0 [ 30.464411] ? get_unmapped_area+0x1f5/0x3f0 [ 30.464962] do_mmap+0x854/0xf00 [ 30.465396] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.465887] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.466477] ksys_mmap_pgoff+0x3af/0x500 [ 30.466978] do_syscall_64+0x3f/0x90 [ 30.467459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.468098] RIP: 0033:0x7f95c572bd82 [ 30.468550] 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 [ 30.470674] RSP: 002b:00007fff4fe0ad18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.471574] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95c572bd82 [ 30.472418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95c4b65000 [ 30.473263] RBP: 00007f95c4b65000 R08: 0000000000000009 R09: 0000000000001000 [ 30.474101] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564dff2c2ec0 [ 30.474984] R13: 00007fff4fe0ad30 R14: 00007fff4fe0ad60 R15: 00007fff4fe0b0c0 [ 30.475829] </TASK> [ 30.476132] [ 30.476346] Allocated by task 213: [ 30.476779] kasan_save_stack+0x22/0x50 [ 30.477279] kasan_set_track+0x25/0x30 [ 30.477771] __kasan_slab_alloc+0x59/0x70 [ 30.478297] kmem_cache_alloc+0x16b/0x370 [ 30.478805] vm_area_dup+0x20/0x160 [ 30.479264] __split_vma+0x170/0x950 [ 30.479737] split_vma+0xc6/0x110 [ 30.480181] mprotect_fixup+0x8d2/0xb30 [ 30.480688] do_mprotect_pkey+0x87e/0xd40 [ 30.481205] __x64_sys_mprotect+0x78/0xc0 [ 30.481729] do_syscall_64+0x3f/0x90 [ 30.482204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.482870] [ 30.483084] Freed by task 210: [ 30.483478] kasan_save_stack+0x22/0x50 [ 30.483977] kasan_set_track+0x25/0x30 [ 30.484470] kasan_save_free_info+0x2b/0x50 [ 30.485004] __kasan_slab_free+0x10a/0x190 [ 30.485536] kmem_cache_free+0x10d/0x4d0 [ 30.486049] rcu_core+0x8c8/0x2860 [ 30.486494] __do_softirq+0x1b7/0x7d4 [ 30.486969] [ 30.487184] Last potentially related work creation: [ 30.487773] kasan_save_stack+0x22/0x50 [ 30.488275] __kasan_record_aux_stack+0x8e/0xa0 [ 30.488856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.489506] remove_vma+0x139/0x170 [ 30.489958] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.490518] do_vmi_munmap+0x1f1/0x2b0 [ 30.491017] __vm_munmap+0x138/0x3a0 [ 30.491484] __x64_sys_munmap+0x59/0x80 [ 30.491976] do_syscall_64+0x3f/0x90 [ 30.492451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.493092] [ 30.493309] The buggy address belongs to the object at ffff888016cd9910 [ 30.493309] which belongs to the cache vm_area_struct of size 168 [ 30.494798] The buggy address is located 88 bytes inside of [ 30.494798] freed 168-byte region [ffff888016cd9910, ffff888016cd99b8) [ 30.496200] [ 30.496418] The buggy address belongs to the physical page: [ 30.497070] page:000000002315efdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cd9 [ 30.498159] memcg:ffff888016fd7b01 [ 30.498592] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.499244] page_type: 0xffffffff() [ 30.499689] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.500604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fd7b01 [ 30.501497] page dumped because: kasan: bad access detected [ 30.502156] [ 30.502382] Memory state around the buggy address: [ 30.502960] ffff888016cd9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.503819] ffff888016cd9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.504663] >ffff888016cd9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.505506] ^ [ 30.506311] ffff888016cd9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.507163] ffff888016cd9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.508003] ================================================================== [ 30.509014] Disabling lock debugging due to kernel taint [ 32.278742] BUG: Bad rss-counter state mm:000000008375cd7c type:MM_FILEPAGES val:33 [ 32.279857] BUG: Bad rss-counter state mm:000000008375cd7c type:MM_ANONPAGES val:22 [ 32.768512] BUG: Bad rss-counter state mm:000000009a6edb0c type:MM_FILEPAGES val:33 [ 32.769808] BUG: Bad rss-counter state mm:000000009a6edb0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51413' (ECDSA) to the list of known hosts. 2023/06/20 18:14:29 fuzzer started 2023/06/20 18:14:29 dialing manager at localhost:36067 2023/06/20 18:14:29 checking machine... 2023/06/20 18:14:29 checking revisions... [ 33.397860] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:14:29 testing simple program... [ 33.445093] cgroup: Unknown subsys name 'net' [ 33.501617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:14:29 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=ffff88806ce09d01 RSI=ffff88806ce09df0 RDI=ffff88806ce09aa8 RBP=ffff88806ce09df0 RSP=ffff88806ce099f0 R8 =ffffffff86138eb4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09df8 R15=ffff88806ce09a98 RIP=ffffffff8113048d RFL=00000293 [--S-A-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 0000000000000000 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=00007f7f52b60420 CR3=0000000016810000 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=2039323a34313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a34313a3831203032 XMM08=20303d64696720303d64697520612f6e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9e135c RSI=ffff88800caefe08 RDI=ffff88806cf09ae8 RBP=0000000000000010 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a6d9 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88800caefe08 R15=ffff88806cf09a98 RIP=ffffffff81131c60 RFL=00000246 [---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 00007fe76c599900 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=00007ffe563f0000 CR3=000000001c95e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000