syzkaller login: [ 30.559621] BUG: Bad rss-counter state mm:000000004a7d7a2e type:MM_FILEPAGES val:33 [ 30.560777] BUG: Bad rss-counter state mm:000000004a7d7a2e type:MM_ANONPAGES val:22 [ 30.720346] ================================================================== [ 30.721172] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.722018] Read of size 8 at addr ffff88800e7df968 by task sshd/220 [ 30.722719] [ 30.722913] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.723759] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.724683] Call Trace: [ 30.724969] [ 30.725227] dump_stack_lvl+0x91/0xf0 [ 30.725668] print_report+0xcc/0x620 [ 30.726135] ? __virt_addr_valid+0x102/0x340 [ 30.726625] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727203] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727764] kasan_report+0xbe/0xf0 [ 30.728182] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728735] vma_interval_tree_remove+0xc75/0xec0 [ 30.729278] vma_prepare+0xc54/0x11a0 [ 30.729715] __split_vma+0x5af/0x950 [ 30.730130] ? __pfx___split_vma+0x10/0x10 [ 30.730610] ? find_held_lock+0x2c/0x110 [ 30.731095] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.731609] ? lock_is_held_type+0x9f/0x120 [ 30.732100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.732639] ? mtree_range_walk+0x632/0x900 [ 30.733144] ? mas_walk+0x5c7/0x7c0 [ 30.733574] do_vmi_munmap+0x1f1/0x2b0 [ 30.734023] mmap_region+0x1f9/0x2660 [ 30.734459] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.734928] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.735575] ? __pfx_lock_acquire+0x10/0x10 [ 30.736047] ? __pfx_mmap_region+0x10/0x10 [ 30.736523] ? security_mmap_addr+0x7d/0xa0 [ 30.737006] ? get_unmapped_area+0x1f5/0x3f0 [ 30.737494] do_mmap+0x854/0xf00 [ 30.737897] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.738342] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.738863] ksys_mmap_pgoff+0x3af/0x500 [ 30.739326] do_syscall_64+0x3f/0x90 [ 30.739761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.740343] RIP: 0033:0x7f11e280fd82 [ 30.740751] 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 [ 30.742690] RSP: 002b:00007ffea374e638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.743515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11e280fd82 [ 30.744297] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11e1c49000 [ 30.745068] RBP: 00007f11e1c49000 R08: 0000000000000009 R09: 0000000000001000 [ 30.745835] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557fdcffd90 [ 30.746589] R13: 00007ffea374e650 R14: 00007ffea374e680 R15: 00007ffea374e9e0 [ 30.747390] [ 30.747651] [ 30.747845] Allocated by task 213: [ 30.748231] kasan_save_stack+0x22/0x50 [ 30.748685] kasan_set_track+0x25/0x30 [ 30.749136] __kasan_slab_alloc+0x59/0x70 [ 30.749612] kmem_cache_alloc+0x16b/0x370 [ 30.750073] vm_area_dup+0x20/0x160 [ 30.750491] __split_vma+0x170/0x950 [ 30.750928] split_vma+0xc6/0x110 [ 30.751323] mprotect_fixup+0x8d2/0xb30 [ 30.751783] do_mprotect_pkey+0x87e/0xd40 [ 30.752256] __x64_sys_mprotect+0x78/0xc0 [ 30.752733] do_syscall_64+0x3f/0x90 [ 30.753164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.753742] [ 30.753940] Freed by task 213: [ 30.754299] kasan_save_stack+0x22/0x50 [ 30.754781] kasan_set_track+0x25/0x30 [ 30.755234] kasan_save_free_info+0x2b/0x50 [ 30.755723] __kasan_slab_free+0x10a/0x190 [ 30.756202] kmem_cache_free+0x10d/0x4d0 [ 30.756666] rcu_core+0x8c8/0x2860 [ 30.757067] __do_softirq+0x1b7/0x7d4 [ 30.757515] [ 30.757712] Last potentially related work creation: [ 30.758251] kasan_save_stack+0x22/0x50 [ 30.758714] __kasan_record_aux_stack+0x8e/0xa0 [ 30.759224] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.759818] remove_vma+0x139/0x170 [ 30.760231] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.760731] do_vmi_munmap+0x1f1/0x2b0 [ 30.761172] __vm_munmap+0x138/0x3a0 [ 30.761598] __x64_sys_munmap+0x59/0x80 [ 30.762041] do_syscall_64+0x3f/0x90 [ 30.762475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763064] [ 30.763258] The buggy address belongs to the object at ffff88800e7df910 [ 30.763258] which belongs to the cache vm_area_struct of size 168 [ 30.764675] The buggy address is located 88 bytes inside of [ 30.764675] freed 168-byte region [ffff88800e7df910, ffff88800e7df9b8) [ 30.765951] [ 30.766144] The buggy address belongs to the physical page: [ 30.766748] page:000000004dbce9bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7df [ 30.767735] memcg:ffff88800cc1b901 [ 30.768128] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.768711] page_type: 0xffffffff() [ 30.769123] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.769956] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc1b901 [ 30.770803] page dumped because: kasan: bad access detected [ 30.771408] [ 30.771612] Memory state around the buggy address: [ 30.772138] ffff88800e7df800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.772909] ffff88800e7df880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.773690] >ffff88800e7df900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.774453] ^ [ 30.775190] ffff88800e7df980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.775965] ffff88800e7dfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.776734] ================================================================== [ 30.777729] Disabling lock debugging due to kernel taint [ 33.077538] BUG: Bad rss-counter state mm:0000000006c11b1d type:MM_FILEPAGES val:33 [ 33.078815] BUG: Bad rss-counter state mm:0000000006c11b1d type:MM_ANONPAGES val:22 [ 33.571964] BUG: Bad rss-counter state mm:00000000d6c1422f type:MM_FILEPAGES val:33 [ 33.572972] BUG: Bad rss-counter state mm:00000000d6c1422f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56574' (ECDSA) to the list of known hosts. 2023/06/20 11:20:15 fuzzer started 2023/06/20 11:20:15 dialing manager at localhost:36067 2023/06/20 11:20:15 checking machine... 2023/06/20 11:20:15 checking revisions... [ 34.273426] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:20:15 testing simple program... [ 34.328307] cgroup: Unknown subsys name 'net' [ 34.369895] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:20:15 Registers: info registers vcpu 0 RAX=ffffffff813782f8 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011b3f3a RSI=ffffffff813782f8 RDI=ffff888008d9fa40 RBP=ffff888008d9fa10 RSP=ffff888008d9f970 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020cbd R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff888016f22540 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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=00007f257fd2ee20 CR3=000000000e1fc000 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=30323a3131203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363538 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=84babf2e60459200 RBX=ffffed100287fe21 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880143ff0f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d9041 RFL=00000286 [--S--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 00007fc25d06c900 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=00007ffeeddc7000 CR3=000000000fec0000 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