syzkaller login: [ 45.139607] BUG: Bad rss-counter state mm:00000000bb7c17a1 type:MM_FILEPAGES val:33 [ 45.140661] BUG: Bad rss-counter state mm:00000000bb7c17a1 type:MM_ANONPAGES val:22 [ 45.326770] ================================================================== [ 45.327748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.328750] Read of size 8 at addr ffff888013fcd798 by task sshd/220 [ 45.329690] [ 45.329920] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.330833] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.331884] Call Trace: [ 45.332220] [ 45.332524] dump_stack_lvl+0x91/0xf0 [ 45.333053] print_report+0xcc/0x620 [ 45.333561] ? __virt_addr_valid+0x102/0x340 [ 45.334150] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.334809] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.335469] kasan_report+0xbe/0xf0 [ 45.335973] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.336650] vma_interval_tree_remove+0xc75/0xec0 [ 45.337308] vma_prepare+0xc54/0x11a0 [ 45.337831] __split_vma+0x5af/0x950 [ 45.338344] ? __pfx___split_vma+0x10/0x10 [ 45.338913] ? find_held_lock+0x2c/0x110 [ 45.339475] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.340091] ? lock_is_held_type+0x9f/0x120 [ 45.340688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.341328] ? mtree_range_walk+0x632/0x900 [ 45.341917] ? mas_walk+0x5c7/0x7c0 [ 45.342432] do_vmi_munmap+0x1f1/0x2b0 [ 45.342956] mmap_region+0x1f9/0x2660 [ 45.343472] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.344030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.344804] ? __pfx_lock_acquire+0x10/0x10 [ 45.345371] ? __pfx_mmap_region+0x10/0x10 [ 45.345948] ? security_mmap_addr+0x7d/0xa0 [ 45.346516] ? get_unmapped_area+0x1f5/0x3f0 [ 45.347113] do_mmap+0x854/0xf00 [ 45.347589] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.348130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.348747] ksys_mmap_pgoff+0x3af/0x500 [ 45.349300] do_syscall_64+0x3f/0x90 [ 45.349817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.350509] RIP: 0033:0x7f590e37fd82 [ 45.351005] 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 [ 45.353303] RSP: 002b:00007ffd1afd7c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.354287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f590e37fd82 [ 45.355196] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f590d7b9000 [ 45.356109] RBP: 00007f590d7b9000 R08: 0000000000000009 R09: 0000000000001000 [ 45.357022] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa7f604b20 [ 45.357934] R13: 00007ffd1afd7c90 R14: 00007ffd1afd7cc0 R15: 00007ffd1afd8020 [ 45.358858] [ 45.359174] [ 45.359404] Allocated by task 213: [ 45.359866] kasan_save_stack+0x22/0x50 [ 45.360416] kasan_set_track+0x25/0x30 [ 45.360949] __kasan_slab_alloc+0x59/0x70 [ 45.361516] kmem_cache_alloc+0x16b/0x370 [ 45.362074] vm_area_dup+0x20/0x160 [ 45.362557] __split_vma+0x170/0x950 [ 45.363065] split_vma+0xc6/0x110 [ 45.363531] mprotect_fixup+0x8d2/0xb30 [ 45.364065] do_mprotect_pkey+0x87e/0xd40 [ 45.364642] __x64_sys_mprotect+0x78/0xc0 [ 45.365211] do_syscall_64+0x3f/0x90 [ 45.365720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.366409] [ 45.366639] Freed by task 213: [ 45.367060] kasan_save_stack+0x22/0x50 [ 45.367604] kasan_set_track+0x25/0x30 [ 45.368135] kasan_save_free_info+0x2b/0x50 [ 45.368714] __kasan_slab_free+0x10a/0x190 [ 45.369288] kmem_cache_free+0x10d/0x4d0 [ 45.369831] rcu_core+0x8c8/0x2860 [ 45.370313] __do_softirq+0x1b7/0x7d4 [ 45.370826] [ 45.371057] Last potentially related work creation: [ 45.371682] kasan_save_stack+0x22/0x50 [ 45.372231] __kasan_record_aux_stack+0x8e/0xa0 [ 45.372856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.373547] remove_vma+0x139/0x170 [ 45.374028] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.374635] do_vmi_munmap+0x1f1/0x2b0 [ 45.375156] __vm_munmap+0x138/0x3a0 [ 45.375655] __x64_sys_munmap+0x59/0x80 [ 45.376191] do_syscall_64+0x3f/0x90 [ 45.376713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.377392] [ 45.377622] Second to last potentially related work creation: [ 45.378348] kasan_save_stack+0x22/0x50 [ 45.378883] __kasan_record_aux_stack+0x8e/0xa0 [ 45.379497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.380185] remove_vma+0x139/0x170 [ 45.380672] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.381276] do_vmi_munmap+0x1f1/0x2b0 [ 45.381795] mmap_region+0x1f9/0x2660 [ 45.382313] do_mmap+0x854/0xf00 [ 45.382776] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.383298] ksys_mmap_pgoff+0x3af/0x500 [ 45.383833] do_syscall_64+0x3f/0x90 [ 45.384339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.385049] [ 45.385284] The buggy address belongs to the object at ffff888013fcd740 [ 45.385284] which belongs to the cache vm_area_struct of size 168 [ 45.386854] The buggy address is located 88 bytes inside of [ 45.386854] freed 168-byte region [ffff888013fcd740, ffff888013fcd7e8) [ 45.388352] [ 45.388592] The buggy address belongs to the physical page: [ 45.389300] page:00000000b0ee700c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13fcd [ 45.390482] memcg:ffff88800e596b01 [ 45.390937] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.391625] page_type: 0xffffffff() [ 45.392112] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 45.393107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e596b01 [ 45.394104] page dumped because: kasan: bad access detected [ 45.394810] [ 45.395040] Memory state around the buggy address: [ 45.395662] ffff888013fcd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.396571] ffff888013fcd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 45.397477] >ffff888013fcd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 45.398380] ^ [ 45.398898] ffff888013fcd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 45.399807] ffff888013fcd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 45.400712] ================================================================== [ 45.401791] Disabling lock debugging due to kernel taint [ 47.420072] BUG: Bad rss-counter state mm:00000000818ed57a type:MM_FILEPAGES val:33 [ 47.421319] BUG: Bad rss-counter state mm:00000000818ed57a type:MM_ANONPAGES val:22 [ 47.878461] BUG: Bad rss-counter state mm:00000000ae0d3e0f type:MM_FILEPAGES val:33 [ 47.879621] BUG: Bad rss-counter state mm:00000000ae0d3e0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47752' (ECDSA) to the list of known hosts. 2023/06/20 04:52:27 fuzzer started 2023/06/20 04:52:27 dialing manager at localhost:44161 2023/06/20 04:52:27 checking machine... 2023/06/20 04:52:27 checking revisions... [ 48.559461] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:52:27 testing simple program... [ 48.605038] cgroup: Unknown subsys name 'net' [ 48.643439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:52:20 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100320af7e RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888019057bd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b8e5 RFL=00000247 [---Z-PC] 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 00007fbe50963900 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=00007fbe50f18650 CR3=000000000de46000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff80000000 RBX=000000002cecc381 RCX=0000000000000000 RDX=ffff888015f551c0 RSI=000000006491308a RDI=000000037fffffff RBP=ffff888019057a40 RSP=ffff8880190579a0 R8 =0000000000000006 R9 =000000037fffffff R10=000000006491308a R11=2f6e6962732f7273 R12=000000006491308a R13=000000006491308a R14=0000000000000001 R15=000000037fffffff RIP=ffffffff814c02f4 RFL=00000292 [--S-A--] 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 00007fbe50963900 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=00007fbe50f1b0b0 CR3=000000000de46000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000