syzkaller login: [ 34.370937] BUG: Bad rss-counter state mm:00000000e39a82c4 type:MM_FILEPAGES val:33 [ 34.372143] BUG: Bad rss-counter state mm:00000000e39a82c4 type:MM_ANONPAGES val:22 [ 34.535677] ================================================================== [ 34.536859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.537794] Read of size 8 at addr ffff888017fdced8 by task sshd/221 [ 34.538724] [ 34.538952] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.539814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.540828] Call Trace: [ 34.541150] [ 34.541480] dump_stack_lvl+0x91/0xf0 [ 34.541982] print_report+0xcc/0x620 [ 34.542460] ? __virt_addr_valid+0x102/0x340 [ 34.543012] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.543634] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.544307] kasan_report+0xbe/0xf0 [ 34.544794] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.545408] vma_interval_tree_remove+0xc75/0xec0 [ 34.546006] vma_prepare+0xc54/0x11a0 [ 34.546482] __split_vma+0x5af/0x950 [ 34.546956] ? __pfx___split_vma+0x10/0x10 [ 34.547522] ? find_held_lock+0x2c/0x110 [ 34.548061] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.548626] ? lock_is_held_type+0x9f/0x120 [ 34.549160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.549762] ? mtree_range_walk+0x632/0x900 [ 34.550308] ? mas_walk+0x5c7/0x7c0 [ 34.550777] do_vmi_munmap+0x1f1/0x2b0 [ 34.551272] mmap_region+0x1f9/0x2660 [ 34.551753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.552316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.553030] ? __pfx_lock_acquire+0x10/0x10 [ 34.553559] ? __pfx_mmap_region+0x10/0x10 [ 34.554092] ? security_mmap_addr+0x7d/0xa0 [ 34.554619] ? get_unmapped_area+0x1f5/0x3f0 [ 34.555195] do_mmap+0x854/0xf00 [ 34.555638] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.556158] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.556717] ksys_mmap_pgoff+0x3af/0x500 [ 34.557231] do_syscall_64+0x3f/0x90 [ 34.557759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.558399] RIP: 0033:0x7fabd8a41d82 [ 34.558859] 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 [ 34.561006] RSP: 002b:00007ffe7c3513e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.561901] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabd8a41d82 [ 34.562730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabd7e7b000 [ 34.563619] RBP: 00007fabd7e7b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.564470] R10: 0000000000000812 R11: 0000000000000206 R12: 000055865f1ddec0 [ 34.565320] R13: 00007ffe7c351400 R14: 00007ffe7c351430 R15: 00007ffe7c351790 [ 34.566211] [ 34.566511] [ 34.566726] Allocated by task 213: [ 34.567157] kasan_save_stack+0x22/0x50 [ 34.567658] kasan_set_track+0x25/0x30 [ 34.568179] __kasan_slab_alloc+0x59/0x70 [ 34.568742] kmem_cache_alloc+0x16b/0x370 [ 34.569265] vm_area_dup+0x20/0x160 [ 34.569725] __split_vma+0x170/0x950 [ 34.570191] split_vma+0xc6/0x110 [ 34.570636] mprotect_fixup+0x8d2/0xb30 [ 34.571141] do_mprotect_pkey+0x87e/0xd40 [ 34.571690] __x64_sys_mprotect+0x78/0xc0 [ 34.572240] do_syscall_64+0x3f/0x90 [ 34.572719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.573363] [ 34.573579] Freed by task 213: [ 34.573975] kasan_save_stack+0x22/0x50 [ 34.574509] kasan_set_track+0x25/0x30 [ 34.575011] kasan_save_free_info+0x2b/0x50 [ 34.575539] __kasan_slab_free+0x10a/0x190 [ 34.576094] kmem_cache_free+0x10d/0x4d0 [ 34.576604] rcu_core+0x8c8/0x2860 [ 34.577088] __do_softirq+0x1b7/0x7d4 [ 34.577565] [ 34.577783] Last potentially related work creation: [ 34.578360] kasan_save_stack+0x22/0x50 [ 34.578867] __kasan_record_aux_stack+0x8e/0xa0 [ 34.579508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.580188] remove_vma+0x139/0x170 [ 34.580640] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.581196] do_vmi_munmap+0x1f1/0x2b0 [ 34.581678] __vm_munmap+0x138/0x3a0 [ 34.582143] __x64_sys_munmap+0x59/0x80 [ 34.582684] do_syscall_64+0x3f/0x90 [ 34.583164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.583806] [ 34.584044] The buggy address belongs to the object at ffff888017fdce80 [ 34.584044] which belongs to the cache vm_area_struct of size 168 [ 34.585518] The buggy address is located 88 bytes inside of [ 34.585518] freed 168-byte region [ffff888017fdce80, ffff888017fdcf28) [ 34.587134] [ 34.587355] The buggy address belongs to the physical page: [ 34.588097] page:0000000010c5aefa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17fdc [ 34.589191] memcg:ffff88800d4b1901 [ 34.589618] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.590287] page_type: 0xffffffff() [ 34.590735] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.591680] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4b1901 [ 34.592614] page dumped because: kasan: bad access detected [ 34.593277] [ 34.593520] Memory state around the buggy address: [ 34.594103] ffff888017fdcd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.594964] ffff888017fdce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.595812] >ffff888017fdce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.596711] ^ [ 34.597432] ffff888017fdcf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.598277] ffff888017fdcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.599135] ================================================================== [ 34.600103] Disabling lock debugging due to kernel taint [ 37.367898] BUG: Bad rss-counter state mm:000000008def4a35 type:MM_FILEPAGES val:33 [ 37.369342] BUG: Bad rss-counter state mm:000000008def4a35 type:MM_ANONPAGES val:22 [ 37.827085] BUG: Bad rss-counter state mm:000000000e5e941e type:MM_FILEPAGES val:33 [ 37.828117] BUG: Bad rss-counter state mm:000000000e5e941e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2354' (ECDSA) to the list of known hosts. 2023/06/19 12:19:45 fuzzer started 2023/06/19 12:19:45 dialing manager at localhost:44161 2023/06/19 12:19:45 checking machine... 2023/06/19 12:19:45 checking revisions... [ 38.542054] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:19:45 testing simple program... [ 38.597601] cgroup: Unknown subsys name 'net' [ 38.668056] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:19:39 Registers: info registers vcpu 0 RAX=1ffffffff0c762be RBX=0000000000000001 RCX=ffffffff863b15f4 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff863b15f6 RBP=ffff888016cf75a0 RSP=ffff888016cf74d8 R8 =ffffffff863b15f8 R9 =ffff888016cf7588 R10=0000000000038001 R11=000000000008a85c R12=ffff888016cf75a8 R13=ffff888016cf7590 R14=ffff888016cf7cb0 R15=ffff888016cf7548 RIP=ffffffff811311c7 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 00007f77489a3900 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=00007f7748f5a618 CR3=0000000019f18000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff861375e0 RBX=ffffffff85dfca90 RCX=ffffffff8180c8d9 RDX=0000000000000000 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffffffff85dfca90 RSP=ffff88806cf099f0 R8 =ffffffff861375e0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfca8c R13=ffffffff85dfca8c R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb7 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 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=00007f9e72d92d50 CR3=000000000c736000 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=130aefa7ac092f8696460b2c472b8ba1 XMM02=ec2efd57dc4c00df000000000011e6f8 XMM03=7e1b31459375630f000000000011e7c8 XMM04=4db6c76fa50e057b00000000000ae988 XMM05=2b36443dd00444a20000000000136308 XMM06=c291bd5c70af25b900000000001353a8 XMM07=e042d86d42eb936e0000000000125bd0 XMM08=7e1b31459375630f000000000011e7c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000