syzkaller login: [ 208.606315] BUG: Bad rss-counter state mm:00000000f565a48f type:MM_FILEPAGES val:33 [ 208.607336] BUG: Bad rss-counter state mm:00000000f565a48f type:MM_ANONPAGES val:22 [ 208.791712] ================================================================== [ 208.792410] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 208.793349] Read of size 8 at addr ffff88800e21aa50 by task sshd/223 [ 208.793952] [ 208.794126] CPU: 1 PID: 223 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 208.794928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 208.795670] Call Trace: [ 208.795920] [ 208.796145] dump_stack_lvl+0x91/0xf0 [ 208.796515] print_report+0xcc/0x620 [ 208.797850] ? __virt_addr_valid+0x102/0x340 [ 208.798273] ? vma_interval_tree_remove+0xc75/0xec0 [ 208.798810] ? vma_interval_tree_remove+0xc75/0xec0 [ 208.799285] kasan_report+0xbe/0xf0 [ 208.799738] ? vma_interval_tree_remove+0xc75/0xec0 [ 208.800215] vma_interval_tree_remove+0xc75/0xec0 [ 208.800761] vma_prepare+0xc54/0x11a0 [ 208.801683] __split_vma+0x5af/0x950 [ 208.802051] ? __pfx___split_vma+0x10/0x10 [ 208.802464] ? find_held_lock+0x2c/0x110 [ 208.803008] do_vmi_align_munmap+0x2ba/0x11f0 [ 208.803440] ? lock_is_held_type+0x9f/0x120 [ 208.803906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 208.804373] ? mtree_range_walk+0x632/0x900 [ 208.806112] ? mas_walk+0x5c7/0x7c0 [ 208.806478] do_vmi_munmap+0x1f1/0x2b0 [ 208.806900] mmap_region+0x1f9/0x2660 [ 208.807261] ? vm_mmap_pgoff+0x15c/0x3a0 [ 208.807796] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 208.808345] ? __pfx_lock_acquire+0x10/0x10 [ 208.808851] ? __pfx_mmap_region+0x10/0x10 [ 208.809261] ? security_mmap_addr+0x7d/0xa0 [ 208.809734] ? get_unmapped_area+0x1f5/0x3f0 [ 208.810160] do_mmap+0x854/0xf00 [ 208.810497] vm_mmap_pgoff+0x1a6/0x3a0 [ 208.810931] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 208.811365] ksys_mmap_pgoff+0x3af/0x500 [ 208.811798] do_syscall_64+0x3f/0x90 [ 208.812175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 208.812761] RIP: 0033:0x7fd393dd3d82 [ 208.813207] 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 [ 208.814920] RSP: 002b:00007fff6af32038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 208.815599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd393dd3d82 [ 208.816306] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd39320d000 [ 208.817053] RBP: 00007fd39320d000 R08: 0000000000000009 R09: 0000000000001000 [ 208.817731] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5f7c96d90 [ 208.818355] R13: 00007fff6af32050 R14: 00007fff6af32080 R15: 00007fff6af323e0 [ 208.819062] [ 208.819285] [ 208.819456] Allocated by task 214: [ 208.819832] kasan_save_stack+0x22/0x50 [ 208.820215] kasan_set_track+0x25/0x30 [ 208.820584] __kasan_slab_alloc+0x59/0x70 [ 208.821253] kmem_cache_alloc+0x16b/0x370 [ 208.821694] vm_area_dup+0x20/0x160 [ 208.822036] __split_vma+0x170/0x950 [ 208.822385] split_vma+0xc6/0x110 [ 208.822778] mprotect_fixup+0x8d2/0xb30 [ 208.823156] do_mprotect_pkey+0x87e/0xd40 [ 208.823540] __x64_sys_mprotect+0x78/0xc0 [ 208.823976] do_syscall_64+0x3f/0x90 [ 208.824315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 208.825601] [ 208.825820] Freed by task 214: [ 208.826112] kasan_save_stack+0x22/0x50 [ 208.826479] kasan_set_track+0x25/0x30 [ 208.827349] kasan_save_free_info+0x2b/0x50 [ 208.827788] __kasan_slab_free+0x10a/0x190 [ 208.828172] kmem_cache_free+0x10d/0x4d0 [ 208.828548] rcu_core+0x8c8/0x2860 [ 208.828999] __do_softirq+0x1b7/0x7d4 [ 208.829356] [ 208.829513] Last potentially related work creation: [ 208.829985] kasan_save_stack+0x22/0x50 [ 208.830352] __kasan_record_aux_stack+0x8e/0xa0 [ 208.830823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 208.831297] remove_vma+0x139/0x170 [ 208.831684] do_vmi_align_munmap+0xd4a/0x11f0 [ 208.832096] do_vmi_munmap+0x1f1/0x2b0 [ 208.832456] __vm_munmap+0x138/0x3a0 [ 208.832889] __x64_sys_munmap+0x59/0x80 [ 208.833258] do_syscall_64+0x3f/0x90 [ 208.833660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 208.834143] [ 208.834307] The buggy address belongs to the object at ffff88800e21a9f8 [ 208.834307] which belongs to the cache vm_area_struct of size 168 [ 208.835448] The buggy address is located 88 bytes inside of [ 208.835448] freed 168-byte region [ffff88800e21a9f8, ffff88800e21aaa0) [ 208.836526] [ 208.836782] The buggy address belongs to the physical page: [ 208.837267] page:00000000c3afbb76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe21a [ 208.838109] memcg:ffff88800ef30801 [ 208.838430] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 208.839008] page_type: 0xffffffff() [ 208.839343] raw: 0100000000000200 ffff88800879fc80 ffffea000040dc40 dead000000000005 [ 208.840075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef30801 [ 208.840897] page dumped because: kasan: bad access detected [ 208.841385] [ 208.841549] Memory state around the buggy address: [ 208.842033] ffff88800e21a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 208.842712] ffff88800e21a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 208.843344] >ffff88800e21aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 208.844037] ^ [ 208.844553] ffff88800e21aa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 208.845262] ffff88800e21ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 208.845941] ================================================================== [ 208.864919] Disabling lock debugging due to kernel taint [ 211.940886] BUG: Bad rss-counter state mm:000000000eda96f0 type:MM_FILEPAGES val:33 [ 211.941546] BUG: Bad rss-counter state mm:000000000eda96f0 type:MM_ANONPAGES val:22 [ 214.184022] BUG: Bad rss-counter state mm:000000002e7286f3 type:MM_FILEPAGES val:33 [ 214.184762] BUG: Bad rss-counter state mm:000000002e7286f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40335' (ECDSA) to the list of known hosts. 2023/06/20 08:07:22 fuzzer started 2023/06/20 08:07:22 dialing manager at localhost:44161 2023/06/20 08:07:22 checking machine... 2023/06/20 08:07:22 checking revisions... [ 215.076912] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:07:23 testing simple program... [ 215.155875] cgroup: Unknown subsys name 'net' [ 215.235150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:04:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f8b12f47328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800fe90001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fe8fb01 RSI=ffff88800fe8fb20 RDI=ffff88800fe8fb20 RBP=ffff88800fe8f260 RSP=ffff88800fe8f190 R8 =0000000000000001 R9 =ffff88800fe8f248 R10=0000000000038001 R11=000000000001c3d4 R12=ffff88800fe8f268 R13=ffff88800fe8f250 R14=ffff88800fe8fb20 R15=ffff88800fe8f208 RIP=ffffffff8112fbf0 RFL=00000202 [-------] 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=00007f00eb024790 CR3=000000000d972000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000