syzkaller login: [ 40.204786] BUG: Bad rss-counter state mm:000000006a3c5188 type:MM_FILEPAGES val:33 [ 40.205819] BUG: Bad rss-counter state mm:000000006a3c5188 type:MM_ANONPAGES val:22 [ 40.366922] ================================================================== [ 40.367846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.368778] Read of size 8 at addr ffff888016a52c20 by task sshd/227 [ 40.369552] [ 40.369770] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.370768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.371764] Call Trace: [ 40.372095] [ 40.372379] dump_stack_lvl+0x91/0xf0 [ 40.372872] print_report+0xcc/0x620 [ 40.373362] ? __virt_addr_valid+0x102/0x340 [ 40.373914] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.374522] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.375121] kasan_report+0xbe/0xf0 [ 40.375596] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.376217] vma_interval_tree_remove+0xc75/0xec0 [ 40.376803] vma_prepare+0xc54/0x11a0 [ 40.377277] __split_vma+0x5af/0x950 [ 40.377744] ? __pfx___split_vma+0x10/0x10 [ 40.378265] ? find_held_lock+0x2c/0x110 [ 40.378782] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.379346] ? lock_is_held_type+0x9f/0x120 [ 40.379892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.380502] ? mtree_range_walk+0x632/0x900 [ 40.381047] ? mas_walk+0x5c7/0x7c0 [ 40.381517] do_vmi_munmap+0x1f1/0x2b0 [ 40.382009] mmap_region+0x1f9/0x2660 [ 40.382488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.382989] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.383702] ? __pfx_lock_acquire+0x10/0x10 [ 40.384233] ? __pfx_mmap_region+0x10/0x10 [ 40.384757] ? security_mmap_addr+0x7d/0xa0 [ 40.385287] ? get_unmapped_area+0x1f5/0x3f0 [ 40.385838] do_mmap+0x854/0xf00 [ 40.386270] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.386759] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.387313] ksys_mmap_pgoff+0x3af/0x500 [ 40.387823] do_syscall_64+0x3f/0x90 [ 40.388302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.388950] RIP: 0033:0x7f1b8d5e8d82 [ 40.389404] 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 [ 40.391491] RSP: 002b:00007fff3bcff1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.392409] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b8d5e8d82 [ 40.393248] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b8ca22000 [ 40.394082] RBP: 00007f1b8ca22000 R08: 0000000000000009 R09: 0000000000001000 [ 40.394934] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f027130d90 [ 40.395771] R13: 00007fff3bcff1d0 R14: 00007fff3bcff200 R15: 00007fff3bcff560 [ 40.396617] [ 40.396906] [ 40.397119] Allocated by task 220: [ 40.397539] kasan_save_stack+0x22/0x50 [ 40.398039] kasan_set_track+0x25/0x30 [ 40.398532] __kasan_slab_alloc+0x59/0x70 [ 40.399046] kmem_cache_alloc+0x16b/0x370 [ 40.399554] vm_area_dup+0x20/0x160 [ 40.400032] __split_vma+0x170/0x950 [ 40.400493] split_vma+0xc6/0x110 [ 40.400929] mprotect_fixup+0x8d2/0xb30 [ 40.401422] do_mprotect_pkey+0x87e/0xd40 [ 40.401936] __x64_sys_mprotect+0x78/0xc0 [ 40.402451] do_syscall_64+0x3f/0x90 [ 40.402915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.403542] [ 40.403766] Freed by task 220: [ 40.404154] kasan_save_stack+0x22/0x50 [ 40.404647] kasan_set_track+0x25/0x30 [ 40.405136] kasan_save_free_info+0x2b/0x50 [ 40.405656] __kasan_slab_free+0x10a/0x190 [ 40.406179] kmem_cache_free+0x10d/0x4d0 [ 40.406680] rcu_core+0x8c8/0x2860 [ 40.407147] __do_softirq+0x1b7/0x7d4 [ 40.407642] [ 40.407860] Last potentially related work creation: [ 40.408451] kasan_save_stack+0x22/0x50 [ 40.408976] __kasan_record_aux_stack+0x8e/0xa0 [ 40.409519] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.410134] remove_vma+0x139/0x170 [ 40.410564] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.411161] do_vmi_munmap+0x1f1/0x2b0 [ 40.411632] __vm_munmap+0x138/0x3a0 [ 40.412078] __x64_sys_munmap+0x59/0x80 [ 40.412553] do_syscall_64+0x3f/0x90 [ 40.413004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.413622] [ 40.413826] The buggy address belongs to the object at ffff888016a52bc8 [ 40.413826] which belongs to the cache vm_area_struct of size 168 [ 40.415213] The buggy address is located 88 bytes inside of [ 40.415213] freed 168-byte region [ffff888016a52bc8, ffff888016a52c70) [ 40.416536] [ 40.416748] The buggy address belongs to the physical page: [ 40.417388] page:00000000540c1c2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a52 [ 40.418474] memcg:ffff88800c644101 [ 40.418889] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.419533] page_type: 0xffffffff() [ 40.419991] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.420903] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c644101 [ 40.421808] page dumped because: kasan: bad access detected [ 40.422459] [ 40.422672] Memory state around the buggy address: [ 40.423250] ffff888016a52b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.424117] ffff888016a52b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.424957] >ffff888016a52c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.425795] ^ [ 40.426324] ffff888016a52c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.427180] ffff888016a52d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.428218] ================================================================== [ 40.429516] Disabling lock debugging due to kernel taint [ 42.360614] BUG: Bad rss-counter state mm:00000000c64ed273 type:MM_FILEPAGES val:33 [ 42.361775] BUG: Bad rss-counter state mm:00000000c64ed273 type:MM_ANONPAGES val:22 [ 42.763941] BUG: Bad rss-counter state mm:0000000001f332c4 type:MM_FILEPAGES val:33 [ 42.765433] BUG: Bad rss-counter state mm:0000000001f332c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43985' (ECDSA) to the list of known hosts. 2023/06/20 05:07:15 fuzzer started 2023/06/20 05:07:15 dialing manager at localhost:44161 2023/06/20 05:07:15 checking machine... 2023/06/20 05:07:15 checking revisions... [ 43.451524] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:07:15 testing simple program... [ 43.504165] cgroup: Unknown subsys name 'net' [ 43.547048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:07:13 Registers: info registers vcpu 0 RAX=ffffffff83644344 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffffffff83644344 RDI=ffff88806ce09b40 RBP=ffff88806ce09b10 RSP=ffff88806ce09a70 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=000000000008ab54 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff888015d7b680 R15=ffff88800d91c700 RIP=ffffffff813ad424 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 00007fbb9a78c700 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=00007fac821b4618 CR3=000000000f206000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3633325b646873732034313a3730 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303233 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000055dfd8be29f0 RBX=000055dfd8be29f0 RCX=0000000000000000 RDX=00007fff82d486e0 RSI=0000000000000002 RDI=000055dfd8be29f0 RBP=000055dfd8be2978 RSP=00007fff82d485a0 R8 =000055dfd8be3ad8 R9 =000000000000000f R10=ffffffffffffffff R11=0000000000000002 R12=000055dfd8be29f0 R13=0000000000000001 R14=0000000000000001 R15=00007fff82d486e0 RIP=00007fd8dadd84cf RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd8da596900 00000000 00000000 GS =0000 0000000000000000 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=00007fd8dae36480 CR3=000000000f084000 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=00000000000000010000000000000000 XMM02=707473696e2d326168732d6173646365 XMM03=eeaded193920000000d8be1923ad20fd XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ffffffffff0000ffffff00ffffffffff XMM10=00000000000000000000000000000000 XMM11=b4ce410d2dc752d3bc51280531cb7470 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000