syzkaller login: [ 36.630562] BUG: Bad rss-counter state mm:00000000f5164d6d type:MM_FILEPAGES val:33 [ 36.631809] BUG: Bad rss-counter state mm:00000000f5164d6d type:MM_ANONPAGES val:22 [ 36.774427] ================================================================== [ 36.775344] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.776344] Read of size 8 at addr ffff888016efe4e0 by task sshd/220 [ 36.777144] [ 36.777363] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.778344] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.779349] Call Trace: [ 36.779669] [ 36.779954] dump_stack_lvl+0x91/0xf0 [ 36.780484] print_report+0xcc/0x620 [ 36.780970] ? __virt_addr_valid+0x102/0x340 [ 36.781519] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.782136] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.782772] kasan_report+0xbe/0xf0 [ 36.783266] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.783887] vma_interval_tree_remove+0xc75/0xec0 [ 36.784529] vma_prepare+0xc54/0x11a0 [ 36.785008] __split_vma+0x5af/0x950 [ 36.785478] ? __pfx___split_vma+0x10/0x10 [ 36.786006] ? find_held_lock+0x2c/0x110 [ 36.786529] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.787096] ? lock_is_held_type+0x9f/0x120 [ 36.787638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.788244] ? mtree_range_walk+0x632/0x900 [ 36.788832] ? mas_walk+0x5c7/0x7c0 [ 36.789306] do_vmi_munmap+0x1f1/0x2b0 [ 36.789802] mmap_region+0x1f9/0x2660 [ 36.790292] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.790808] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.791522] ? __pfx_lock_acquire+0x10/0x10 [ 36.792054] ? __pfx_mmap_region+0x10/0x10 [ 36.792622] ? security_mmap_addr+0x7d/0xa0 [ 36.793156] ? get_unmapped_area+0x1f5/0x3f0 [ 36.793709] do_mmap+0x854/0xf00 [ 36.794148] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.794640] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.795198] ksys_mmap_pgoff+0x3af/0x500 [ 36.795707] do_syscall_64+0x3f/0x90 [ 36.796183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.796867] RIP: 0033:0x7f029d061d82 [ 36.797325] 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 [ 36.799453] RSP: 002b:00007ffc187d3778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.800387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f029d061d82 [ 36.801252] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f029c49b000 [ 36.802102] RBP: 00007f029c49b000 R08: 0000000000000009 R09: 0000000000001000 [ 36.802950] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555aeb876ec0 [ 36.803793] R13: 00007ffc187d3790 R14: 00007ffc187d37c0 R15: 00007ffc187d3b20 [ 36.804673] [ 36.804966] [ 36.805178] Allocated by task 213: [ 36.805609] kasan_save_stack+0x22/0x50 [ 36.806110] kasan_set_track+0x25/0x30 [ 36.806601] __kasan_slab_alloc+0x59/0x70 [ 36.807126] kmem_cache_alloc+0x16b/0x370 [ 36.807644] vm_area_dup+0x20/0x160 [ 36.808095] __split_vma+0x170/0x950 [ 36.808588] split_vma+0xc6/0x110 [ 36.809036] mprotect_fixup+0x8d2/0xb30 [ 36.809545] do_mprotect_pkey+0x87e/0xd40 [ 36.810074] __x64_sys_mprotect+0x78/0xc0 [ 36.810595] do_syscall_64+0x3f/0x90 [ 36.811065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.811705] [ 36.811921] Freed by task 213: [ 36.812311] kasan_save_stack+0x22/0x50 [ 36.812848] kasan_set_track+0x25/0x30 [ 36.813344] kasan_save_free_info+0x2b/0x50 [ 36.813879] __kasan_slab_free+0x10a/0x190 [ 36.814416] kmem_cache_free+0x10d/0x4d0 [ 36.814921] rcu_core+0x8c8/0x2860 [ 36.815366] __do_softirq+0x1b7/0x7d4 [ 36.815838] [ 36.816054] Last potentially related work creation: [ 36.816685] kasan_save_stack+0x22/0x50 [ 36.817190] __kasan_record_aux_stack+0x8e/0xa0 [ 36.817761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.818407] remove_vma+0x139/0x170 [ 36.818859] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.819422] do_vmi_munmap+0x1f1/0x2b0 [ 36.819916] __vm_munmap+0x138/0x3a0 [ 36.820392] __x64_sys_munmap+0x59/0x80 [ 36.820906] do_syscall_64+0x3f/0x90 [ 36.821379] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.822025] [ 36.822241] Second to last potentially related work creation: [ 36.822942] kasan_save_stack+0x22/0x50 [ 36.823448] __kasan_record_aux_stack+0x8e/0xa0 [ 36.824019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.824699] remove_vma+0x139/0x170 [ 36.825150] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.825709] do_vmi_munmap+0x1f1/0x2b0 [ 36.826191] mmap_region+0x1f9/0x2660 [ 36.826669] do_mmap+0x854/0xf00 [ 36.827097] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.827586] ksys_mmap_pgoff+0x3af/0x500 [ 36.828090] do_syscall_64+0x3f/0x90 [ 36.828594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.829239] [ 36.829459] The buggy address belongs to the object at ffff888016efe488 [ 36.829459] which belongs to the cache vm_area_struct of size 168 [ 36.830926] The buggy address is located 88 bytes inside of [ 36.830926] freed 168-byte region [ffff888016efe488, ffff888016efe530) [ 36.832331] [ 36.832572] The buggy address belongs to the physical page: [ 36.833231] page:0000000096952e03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16efe [ 36.834335] memcg:ffff888016acf901 [ 36.834764] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.835464] page_type: 0xffffffff() [ 36.835918] raw: 0100000000000200 ffff88800879fc80 ffffea0000606e00 dead000000000005 [ 36.836877] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016acf901 [ 36.837791] page dumped because: kasan: bad access detected [ 36.838454] [ 36.838670] Memory state around the buggy address: [ 36.839256] ffff888016efe380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.840122] ffff888016efe400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 36.841014] >ffff888016efe480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.841873] ^ [ 36.842633] ffff888016efe500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.843500] ffff888016efe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.844357] ================================================================== [ 36.845355] Disabling lock debugging due to kernel taint [ 38.905275] BUG: Bad rss-counter state mm:000000000d49fc89 type:MM_FILEPAGES val:33 [ 38.906350] BUG: Bad rss-counter state mm:000000000d49fc89 type:MM_ANONPAGES val:22 [ 39.393592] BUG: Bad rss-counter state mm:000000001441c55b type:MM_FILEPAGES val:33 [ 39.394984] BUG: Bad rss-counter state mm:000000001441c55b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54304' (ECDSA) to the list of known hosts. 2023/06/19 11:03:48 fuzzer started 2023/06/19 11:03:48 dialing manager at localhost:44161 2023/06/19 11:03:48 checking machine... 2023/06/19 11:03:48 checking revisions... [ 40.120737] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:03:48 testing simple program... [ 40.171845] cgroup: Unknown subsys name 'net' [ 40.211203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:03:41 Registers: info registers vcpu 0 RAX=ffffffff8460144a RBX=0000000000000002 RCX=ffffffff864b1158 RDX=dffffc0000000000 RSI=ffffffff85407d60 RDI=1ffff1100d9c135e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b115c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407d68 R15=ffff88806ce09a98 RIP=ffffffff8113106f 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 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=00007fadd01d6000 CR3=0000000014732000 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=2037343a33303a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a33303a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab4224 RDI=ffff8880181703f4 RBP=ffff888018170000 RSP=ffff8880161b74d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000c0000000c00 R12=0000000000000000 R13=0000000000000030 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff81374491 RFL=00000217 [----APC] 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 00007fc396dab900 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=00007ffcd47bb000 CR3=000000000e266000 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