syzkaller login: [ 35.710809] BUG: Bad rss-counter state mm:000000005759aca1 type:MM_FILEPAGES val:33 [ 35.712286] BUG: Bad rss-counter state mm:000000005759aca1 type:MM_ANONPAGES val:22 [ 35.882209] ================================================================== [ 35.883281] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.884477] Read of size 8 at addr ffff88800f0823f8 by task sshd/222 [ 35.885539] [ 35.885800] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.886826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.888028] Call Trace: [ 35.888466] [ 35.888805] dump_stack_lvl+0x91/0xf0 [ 35.889352] print_report+0xcc/0x620 [ 35.889847] ? __virt_addr_valid+0x102/0x340 [ 35.890386] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.890973] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.891556] kasan_report+0xbe/0xf0 [ 35.892008] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.892630] vma_interval_tree_remove+0xc75/0xec0 [ 35.893203] vma_prepare+0xc54/0x11a0 [ 35.893657] __split_vma+0x5af/0x950 [ 35.894101] ? __pfx___split_vma+0x10/0x10 [ 35.894603] ? find_held_lock+0x2c/0x110 [ 35.895097] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.895630] ? lock_is_held_type+0x9f/0x120 [ 35.896139] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.896738] ? mtree_range_walk+0x632/0x900 [ 35.897271] ? mas_walk+0x5c7/0x7c0 [ 35.897742] do_vmi_munmap+0x1f1/0x2b0 [ 35.898236] mmap_region+0x1f9/0x2660 [ 35.898723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.899225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.899925] ? __pfx_lock_acquire+0x10/0x10 [ 35.900506] ? __pfx_mmap_region+0x10/0x10 [ 35.901034] ? security_mmap_addr+0x7d/0xa0 [ 35.901553] ? get_unmapped_area+0x1f5/0x3f0 [ 35.902092] do_mmap+0x854/0xf00 [ 35.902525] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.903015] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.903563] ksys_mmap_pgoff+0x3af/0x500 [ 35.904063] do_syscall_64+0x3f/0x90 [ 35.904556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.905181] RIP: 0033:0x7fb917177d82 [ 35.905610] 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 [ 35.907600] RSP: 002b:00007fff89f9b9e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.908494] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb917177d82 [ 35.909304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9165b1000 [ 35.910128] RBP: 00007fb9165b1000 R08: 0000000000000009 R09: 0000000000001000 [ 35.910943] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561225d3fec0 [ 35.911765] R13: 00007fff89f9ba00 R14: 00007fff89f9ba30 R15: 00007fff89f9bd90 [ 35.912636] [ 35.912923] [ 35.913136] Allocated by task 215: [ 35.913553] kasan_save_stack+0x22/0x50 [ 35.914041] kasan_set_track+0x25/0x30 [ 35.914526] __kasan_slab_alloc+0x59/0x70 [ 35.915040] kmem_cache_alloc+0x16b/0x370 [ 35.915555] vm_area_dup+0x20/0x160 [ 35.915994] __split_vma+0x170/0x950 [ 35.916500] split_vma+0xc6/0x110 [ 35.916933] mprotect_fixup+0x8d2/0xb30 [ 35.917419] do_mprotect_pkey+0x87e/0xd40 [ 35.917930] __x64_sys_mprotect+0x78/0xc0 [ 35.918448] do_syscall_64+0x3f/0x90 [ 35.918908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.919531] [ 35.919738] Freed by task 205: [ 35.920111] kasan_save_stack+0x22/0x50 [ 35.920647] kasan_set_track+0x25/0x30 [ 35.921130] kasan_save_free_info+0x2b/0x50 [ 35.921648] __kasan_slab_free+0x10a/0x190 [ 35.922163] kmem_cache_free+0x10d/0x4d0 [ 35.922670] rcu_core+0x8c8/0x2860 [ 35.923109] __do_softirq+0x1b7/0x7d4 [ 35.923582] [ 35.923790] Last potentially related work creation: [ 35.924382] kasan_save_stack+0x22/0x50 [ 35.924885] __kasan_record_aux_stack+0x8e/0xa0 [ 35.925447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.926075] remove_vma+0x139/0x170 [ 35.926509] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.927125] do_vmi_munmap+0x1f1/0x2b0 [ 35.927605] __vm_munmap+0x138/0x3a0 [ 35.928070] __x64_sys_munmap+0x59/0x80 [ 35.928603] do_syscall_64+0x3f/0x90 [ 35.929063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.929689] [ 35.929908] The buggy address belongs to the object at ffff88800f0823a0 [ 35.929908] which belongs to the cache vm_area_struct of size 168 [ 35.931368] The buggy address is located 88 bytes inside of [ 35.931368] freed 168-byte region [ffff88800f0823a0, ffff88800f082448) [ 35.932811] [ 35.933024] The buggy address belongs to the physical page: [ 35.933660] page:00000000c61ad2b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf082 [ 35.934735] memcg:ffff888016a04001 [ 35.935156] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.935857] page_type: 0xffffffff() [ 35.936298] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6340 dead000000000007 [ 35.937244] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a04001 [ 35.938139] page dumped because: kasan: bad access detected [ 35.938790] [ 35.939000] Memory state around the buggy address: [ 35.939565] ffff88800f082280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.940454] ffff88800f082300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.941305] >ffff88800f082380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.942127] ^ [ 35.942946] ffff88800f082400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.943803] ffff88800f082480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.944713] ================================================================== [ 35.945681] Disabling lock debugging due to kernel taint [ 38.801211] BUG: Bad rss-counter state mm:0000000020516441 type:MM_FILEPAGES val:33 [ 38.802221] BUG: Bad rss-counter state mm:0000000020516441 type:MM_ANONPAGES val:22 [ 39.288473] BUG: Bad rss-counter state mm:00000000cbed624b type:MM_FILEPAGES val:33 [ 39.289486] BUG: Bad rss-counter state mm:00000000cbed624b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22224' (ECDSA) to the list of known hosts. 2023/06/19 19:01:06 fuzzer started 2023/06/19 19:01:06 dialing manager at localhost:44161 2023/06/19 19:01:06 checking machine... 2023/06/19 19:01:06 checking revisions... [ 40.021475] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:01:06 testing simple program... [ 40.072650] cgroup: Unknown subsys name 'net' [ 40.134333] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:01:01 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff8613751a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800d86faf8 RSP=ffff88800d86fa30 R8 =ffffffff8613751e R9 =ffff88800d86fae0 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800d86fb00 R13=ffff88800d86fae8 R14=ffff88800d86fdf0 R15=ffff88800d86faa0 RIP=ffffffff81130bce RFL=00000293 [--S-A-C] 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 00007f1c98a0f900 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=00007ffd09cef000 CR3=000000000cb5c000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f2f1bacef90 CR3=000000000dae4000 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=45c611bfe15d0e9a5f4094058e012a38 XMM02=000000000011e508ec2efd57dc4c00df XMM03=00000000001256f0a999af3a579251f6 XMM04=70518ba755fcf84f00000000000ae988 XMM05=5d6f5d86616c7fc500000000001357a0 XMM06=00c3ffa147b8d8570000000000135198 XMM07=e042d86d42eb936e0000000000125970 XMM08=a999af3a579251f6000000000011e568 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000