syzkaller login: [ 30.803624] BUG: Bad rss-counter state mm:00000000501d327f type:MM_FILEPAGES val:33 [ 30.804889] BUG: Bad rss-counter state mm:00000000501d327f type:MM_ANONPAGES val:22 [ 30.843711] ================================================================== [ 30.844721] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.845754] Read of size 8 at addr ffff88800d477968 by task sshd/220 [ 30.846568] [ 30.846900] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.847789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.848814] Call Trace: [ 30.849187] [ 30.849455] dump_stack_lvl+0x91/0xf0 [ 30.850045] print_report+0xcc/0x620 [ 30.850586] ? __virt_addr_valid+0x102/0x340 [ 30.851147] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851808] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852403] kasan_report+0xbe/0xf0 [ 30.852867] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.853592] vma_interval_tree_remove+0xc75/0xec0 [ 30.854169] vma_prepare+0xc54/0x11a0 [ 30.854625] __split_vma+0x5af/0x950 [ 30.855088] ? __pfx___split_vma+0x10/0x10 [ 30.855604] ? find_held_lock+0x2c/0x110 [ 30.856114] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.856666] ? lock_is_held_type+0x9f/0x120 [ 30.857199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.857814] ? mtree_range_walk+0x632/0x900 [ 30.858360] ? mas_walk+0x5c7/0x7c0 [ 30.858838] do_vmi_munmap+0x1f1/0x2b0 [ 30.859329] mmap_region+0x1f9/0x2660 [ 30.859797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.860307] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.861014] ? __pfx_lock_acquire+0x10/0x10 [ 30.861546] ? __pfx_mmap_region+0x10/0x10 [ 30.862093] ? security_mmap_addr+0x7d/0xa0 [ 30.862667] ? get_unmapped_area+0x1f5/0x3f0 [ 30.863193] do_mmap+0x854/0xf00 [ 30.863608] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.864074] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.864599] ksys_mmap_pgoff+0x3af/0x500 [ 30.865078] do_syscall_64+0x3f/0x90 [ 30.865527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866144] RIP: 0033:0x7f32f79a4d82 [ 30.866574] 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 [ 30.868558] RSP: 002b:00007ffcd4865a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.869424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f32f79a4d82 [ 30.870276] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f32f6dde000 [ 30.871121] RBP: 00007f32f6dde000 R08: 0000000000000009 R09: 0000000000001000 [ 30.871956] R10: 0000000000000812 R11: 0000000000000206 R12: 000055761f41bec0 [ 30.872805] R13: 00007ffcd4865a70 R14: 00007ffcd4865aa0 R15: 00007ffcd4865e00 [ 30.873649] [ 30.873951] [ 30.874167] Allocated by task 213: [ 30.874597] kasan_save_stack+0x22/0x50 [ 30.875092] kasan_set_track+0x25/0x30 [ 30.875580] __kasan_slab_alloc+0x59/0x70 [ 30.876095] kmem_cache_alloc+0x16b/0x370 [ 30.876613] vm_area_dup+0x20/0x160 [ 30.877070] __split_vma+0x170/0x950 [ 30.877532] split_vma+0xc6/0x110 [ 30.877980] mprotect_fixup+0x8d2/0xb30 [ 30.878475] do_mprotect_pkey+0x87e/0xd40 [ 30.878993] __x64_sys_mprotect+0x78/0xc0 [ 30.879508] do_syscall_64+0x3f/0x90 [ 30.879988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880625] [ 30.880834] Freed by task 213: [ 30.881214] kasan_save_stack+0x22/0x50 [ 30.881716] kasan_set_track+0x25/0x30 [ 30.882219] kasan_save_free_info+0x2b/0x50 [ 30.882743] __kasan_slab_free+0x10a/0x190 [ 30.883282] kmem_cache_free+0x10d/0x4d0 [ 30.883774] rcu_core+0x8c8/0x2860 [ 30.884218] __do_softirq+0x1b7/0x7d4 [ 30.884696] [ 30.884907] Last potentially related work creation: [ 30.885483] kasan_save_stack+0x22/0x50 [ 30.886001] __kasan_record_aux_stack+0x8e/0xa0 [ 30.886565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.887202] remove_vma+0x139/0x170 [ 30.887644] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.888202] do_vmi_munmap+0x1f1/0x2b0 [ 30.888752] __vm_munmap+0x138/0x3a0 [ 30.889217] __x64_sys_munmap+0x59/0x80 [ 30.889719] do_syscall_64+0x3f/0x90 [ 30.890186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890821] [ 30.891031] The buggy address belongs to the object at ffff88800d477910 [ 30.891031] which belongs to the cache vm_area_struct of size 168 [ 30.892485] The buggy address is located 88 bytes inside of [ 30.892485] freed 168-byte region [ffff88800d477910, ffff88800d4779b8) [ 30.893897] [ 30.894111] The buggy address belongs to the physical page: [ 30.894763] page:000000006e5d9d27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd477 [ 30.895858] memcg:ffff88800edd9b01 [ 30.896282] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.896981] page_type: 0xffffffff() [ 30.897427] raw: 0100000000000200 ffff8880087a0c80 ffffea0000390f40 dead000000000003 [ 30.898346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edd9b01 [ 30.899235] page dumped because: kasan: bad access detected [ 30.899895] [ 30.900110] Memory state around the buggy address: [ 30.900682] ffff88800d477800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.901528] ffff88800d477880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.902406] >ffff88800d477900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.903256] ^ [ 30.904037] ffff88800d477980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.904884] ffff88800d477a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.905731] ================================================================== [ 30.906665] Disabling lock debugging due to kernel taint [ 33.154616] BUG: Bad rss-counter state mm:00000000afc812ec type:MM_FILEPAGES val:33 [ 33.155605] BUG: Bad rss-counter state mm:00000000afc812ec type:MM_ANONPAGES val:22 [ 33.646910] BUG: Bad rss-counter state mm:00000000b933a5d7 type:MM_FILEPAGES val:33 [ 33.648020] BUG: Bad rss-counter state mm:00000000b933a5d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2046' (ECDSA) to the list of known hosts. 2023/06/20 14:04:29 fuzzer started 2023/06/20 14:04:29 dialing manager at localhost:36067 2023/06/20 14:04:29 checking machine... 2023/06/20 14:04:29 checking revisions... [ 34.381028] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:04:29 testing simple program... [ 34.438736] cgroup: Unknown subsys name 'net' [ 34.477829] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:04:29 Registers: info registers vcpu 0 RAX=0100000000010200 RBX=ffff88801593c400 RCX=ffffea0000564e01 RDX=ffffea0000564e00 RSI=ffff888015a3c400 RDI=ffff8880087b83c0 RBP=0000000000000000 RSP=ffff88801585fc78 R8 =ffff88801593c400 R9 =0000000000000000 R10=ffffea0000568e00 R11=0000000080070001 R12=dffffc0000000000 R13=ffff88801585fcb8 R14=0000000000000000 R15=ffff888015a3c400 RIP=ffffffff818103a7 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 00007f05a83f0900 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=00007f05a787f1d0 CR3=000000000c9d2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=da3941eef28362b700000000000ae988 XMM05=97a6d7c5631f619a0000000000132258 XMM06=19e9129bd510f2350000000000130d80 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff2f06 RBX=ffffffff87f97640 RCX=0000000000000000 RDX=ffff8880182db680 RSI=ffffffff83ab18a9 RDI=ffffffff87f97830 RBP=0000000000000000 RSP=ffff88801c53f508 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000d1 R11=00000a9900000a99 R12=0000000000000000 R13=00000000000000d1 R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff83ab18c4 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 00007fda63799900 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=00007fda63d50618 CR3=000000000e44c000 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=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