syzkaller login: [ 30.754172] BUG: Bad rss-counter state mm:00000000db05ebac type:MM_FILEPAGES val:33 [ 30.755387] BUG: Bad rss-counter state mm:00000000db05ebac type:MM_ANONPAGES val:22 [ 30.800111] ================================================================== [ 30.801170] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.802343] Read of size 8 at addr ffff88801905e968 by task sshd/219 [ 30.803274] [ 30.803490] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.804356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.805539] Call Trace: [ 30.805926] [ 30.806265] dump_stack_lvl+0x91/0xf0 [ 30.806820] print_report+0xcc/0x620 [ 30.807331] ? __virt_addr_valid+0x102/0x340 [ 30.807972] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.808733] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.809381] kasan_report+0xbe/0xf0 [ 30.809858] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.810511] vma_interval_tree_remove+0xc75/0xec0 [ 30.811136] vma_prepare+0xc54/0x11a0 [ 30.811615] __split_vma+0x5af/0x950 [ 30.812085] ? __pfx___split_vma+0x10/0x10 [ 30.812605] ? find_held_lock+0x2c/0x110 [ 30.813123] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.813682] ? lock_is_held_type+0x9f/0x120 [ 30.814224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.814833] ? mtree_range_walk+0x632/0x900 [ 30.815389] ? mas_walk+0x5c7/0x7c0 [ 30.815860] do_vmi_munmap+0x1f1/0x2b0 [ 30.816357] mmap_region+0x1f9/0x2660 [ 30.816837] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.817344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.818081] ? __pfx_lock_acquire+0x10/0x10 [ 30.818651] ? __pfx_mmap_region+0x10/0x10 [ 30.819207] ? security_mmap_addr+0x7d/0xa0 [ 30.819756] ? get_unmapped_area+0x1f5/0x3f0 [ 30.820318] do_mmap+0x854/0xf00 [ 30.820769] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.821279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.821858] ksys_mmap_pgoff+0x3af/0x500 [ 30.822376] do_syscall_64+0x3f/0x90 [ 30.822882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823534] RIP: 0033:0x7f8268882d82 [ 30.823996] 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 [ 30.826146] RSP: 002b:00007ffd853fc6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.827049] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8268882d82 [ 30.827899] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8267cbc000 [ 30.828737] RBP: 00007f8267cbc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.829584] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557cdf466980 [ 30.830435] R13: 00007ffd853fc700 R14: 00007ffd853fc730 R15: 00007ffd853fca90 [ 30.831305] [ 30.831597] [ 30.831812] Allocated by task 212: [ 30.832242] kasan_save_stack+0x22/0x50 [ 30.832741] kasan_set_track+0x25/0x30 [ 30.833230] __kasan_slab_alloc+0x59/0x70 [ 30.833747] kmem_cache_alloc+0x16b/0x370 [ 30.834260] vm_area_dup+0x20/0x160 [ 30.834717] __split_vma+0x170/0x950 [ 30.835182] split_vma+0xc6/0x110 [ 30.835617] mprotect_fixup+0x8d2/0xb30 [ 30.836118] do_mprotect_pkey+0x87e/0xd40 [ 30.836645] __x64_sys_mprotect+0x78/0xc0 [ 30.837164] do_syscall_64+0x3f/0x90 [ 30.837638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838281] [ 30.838505] Freed by task 212: [ 30.838899] kasan_save_stack+0x22/0x50 [ 30.839404] kasan_set_track+0x25/0x30 [ 30.839898] kasan_save_free_info+0x2b/0x50 [ 30.840429] __kasan_slab_free+0x10a/0x190 [ 30.840966] kmem_cache_free+0x10d/0x4d0 [ 30.841519] rcu_core+0x8c8/0x2860 [ 30.841959] __do_softirq+0x1b7/0x7d4 [ 30.842436] [ 30.842663] Last potentially related work creation: [ 30.843249] kasan_save_stack+0x22/0x50 [ 30.843748] __kasan_record_aux_stack+0x8e/0xa0 [ 30.844325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.844963] remove_vma+0x139/0x170 [ 30.845411] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.845966] do_vmi_munmap+0x1f1/0x2b0 [ 30.846451] __vm_munmap+0x138/0x3a0 [ 30.846931] __x64_sys_munmap+0x59/0x80 [ 30.847434] do_syscall_64+0x3f/0x90 [ 30.847905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848546] [ 30.848761] The buggy address belongs to the object at ffff88801905e910 [ 30.848761] which belongs to the cache vm_area_struct of size 168 [ 30.850225] The buggy address is located 88 bytes inside of [ 30.850225] freed 168-byte region [ffff88801905e910, ffff88801905e9b8) [ 30.851658] [ 30.851876] The buggy address belongs to the physical page: [ 30.852535] page:000000005f79aed5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1905e [ 30.853629] memcg:ffff8880190b6b01 [ 30.854058] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.854711] page_type: 0xffffffff() [ 30.855163] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.856073] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880190b6b01 [ 30.856980] page dumped because: kasan: bad access detected [ 30.857636] [ 30.857849] Memory state around the buggy address: [ 30.858435] ffff88801905e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.859294] ffff88801905e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.860178] >ffff88801905e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.861048] ^ [ 30.861832] ffff88801905e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.862717] ffff88801905ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.863574] ================================================================== [ 30.864539] Disabling lock debugging due to kernel taint [ 33.036531] BUG: Bad rss-counter state mm:0000000082b3ca21 type:MM_FILEPAGES val:33 [ 33.037689] BUG: Bad rss-counter state mm:0000000082b3ca21 type:MM_ANONPAGES val:22 [ 33.423336] BUG: Bad rss-counter state mm:00000000ef00a70b type:MM_FILEPAGES val:33 [ 33.424814] BUG: Bad rss-counter state mm:00000000ef00a70b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55820' (ECDSA) to the list of known hosts. 2023/06/20 21:27:05 fuzzer started 2023/06/20 21:27:05 dialing manager at localhost:36067 2023/06/20 21:27:05 checking machine... 2023/06/20 21:27:05 checking revisions... [ 34.141181] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:27:05 testing simple program... [ 34.198650] cgroup: Unknown subsys name 'net' [ 34.267534] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:27:05 Registers: info registers vcpu 0 RAX=ffffea00003f7cc8 RBX=00000000000001ef RCX=ffff88806ce40190 RDX=1ffffd400007ef9a RSI=0000000000000008 RDI=ffffea00003f7cd0 RBP=0000000000000000 RSP=ffff88806ce09cd0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000168f4 R12=0000000000000001 R13=dffffc0000000000 R14=ffffea00003f7cc0 R15=ffff88806ce40140 RIP=ffffffff8178b8c1 RFL=00000046 [---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 00007f644412c900 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=00007f644352d850 CR3=000000000d8b6000 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=093a06da8726b5aae0417f3ffc84405c XMM02=000000000011c328eff9b2d0a8fce9cb XMM03=000000000011c3f82c67c8bc2e329bc3 XMM04=93bf7c841d625a0d00000000000ae988 XMM05=19e9129bd510f2350000000000132fc0 XMM06=179672e94704a82e0000000000131e28 XMM07=e042d86d42eb936e00000000001230f0 XMM08=65045c562011f7d7000000000011c3f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e37978 RCX=0000000000000001 RDX=1ffff110011c6f30 RSI=ffff888008e37948 RDI=ffff888008e37980 RBP=ffff888008e37a10 RSP=ffff888008e378b8 R8 =0000000000000001 R9 =ffff888008e379b8 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e379d8 R13=ffff888008e379c0 R14=ffff888008e37948 R15=ffff888008e37978 RIP=ffffffff81131c83 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 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=00007ffdc93ad000 CR3=000000000ef86000 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