syzkaller login: [ 38.724488] BUG: Bad rss-counter state mm:000000006e1ecb95 type:MM_FILEPAGES val:33 [ 38.725447] BUG: Bad rss-counter state mm:000000006e1ecb95 type:MM_ANONPAGES val:22 [ 38.884085] ================================================================== [ 38.884954] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.886025] Read of size 8 at addr ffff888009d35ed8 by task sshd/219 [ 38.886741] [ 38.886948] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.887777] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.888713] Call Trace: [ 38.889033] [ 38.889316] dump_stack_lvl+0x91/0xf0 [ 38.889805] print_report+0xcc/0x620 [ 38.890290] ? __virt_addr_valid+0x102/0x340 [ 38.890833] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891451] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.892091] kasan_report+0xbe/0xf0 [ 38.892563] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.893183] vma_interval_tree_remove+0xc75/0xec0 [ 38.893790] vma_prepare+0xc54/0x11a0 [ 38.894262] __split_vma+0x5af/0x950 [ 38.894739] ? __pfx___split_vma+0x10/0x10 [ 38.895265] ? find_held_lock+0x2c/0x110 [ 38.895801] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.896359] ? lock_is_held_type+0x9f/0x120 [ 38.896900] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.897511] ? mtree_range_walk+0x632/0x900 [ 38.898065] ? mas_walk+0x5c7/0x7c0 [ 38.898527] do_vmi_munmap+0x1f1/0x2b0 [ 38.899020] mmap_region+0x1f9/0x2660 [ 38.899492] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.900023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.900720] ? __pfx_lock_acquire+0x10/0x10 [ 38.901253] ? __pfx_mmap_region+0x10/0x10 [ 38.901782] ? security_mmap_addr+0x7d/0xa0 [ 38.902301] ? get_unmapped_area+0x1f5/0x3f0 [ 38.902841] do_mmap+0x854/0xf00 [ 38.903265] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.903756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.904313] ksys_mmap_pgoff+0x3af/0x500 [ 38.904790] do_syscall_64+0x3f/0x90 [ 38.905245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.905854] RIP: 0033:0x7f2a9524fd82 [ 38.906330] 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 [ 38.908438] RSP: 002b:00007ffe5482fce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.909292] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a9524fd82 [ 38.910100] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a94689000 [ 38.910901] RBP: 00007f2a94689000 R08: 0000000000000009 R09: 0000000000001000 [ 38.911706] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea6a9b8ec0 [ 38.912515] R13: 00007ffe5482fd00 R14: 00007ffe5482fd30 R15: 00007ffe54830090 [ 38.913330] [ 38.913608] [ 38.913814] Allocated by task 212: [ 38.914224] kasan_save_stack+0x22/0x50 [ 38.914705] kasan_set_track+0x25/0x30 [ 38.915170] __kasan_slab_alloc+0x59/0x70 [ 38.915666] kmem_cache_alloc+0x16b/0x370 [ 38.916166] vm_area_dup+0x20/0x160 [ 38.916599] __split_vma+0x170/0x950 [ 38.917063] split_vma+0xc6/0x110 [ 38.917496] mprotect_fixup+0x8d2/0xb30 [ 38.917990] do_mprotect_pkey+0x87e/0xd40 [ 38.918506] __x64_sys_mprotect+0x78/0xc0 [ 38.919028] do_syscall_64+0x3f/0x90 [ 38.919490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920135] [ 38.920349] Freed by task 212: [ 38.920737] kasan_save_stack+0x22/0x50 [ 38.921228] kasan_set_track+0x25/0x30 [ 38.921719] kasan_save_free_info+0x2b/0x50 [ 38.922254] __kasan_slab_free+0x10a/0x190 [ 38.922791] kmem_cache_free+0x10d/0x4d0 [ 38.923289] rcu_core+0x8c8/0x2860 [ 38.923723] __do_softirq+0x1b7/0x7d4 [ 38.924210] [ 38.924420] Last potentially related work creation: [ 38.924998] kasan_save_stack+0x22/0x50 [ 38.925498] __kasan_record_aux_stack+0x8e/0xa0 [ 38.926066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.926783] remove_vma+0x139/0x170 [ 38.927227] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.927790] do_vmi_munmap+0x1f1/0x2b0 [ 38.928274] __vm_munmap+0x138/0x3a0 [ 38.928741] __x64_sys_munmap+0x59/0x80 [ 38.929231] do_syscall_64+0x3f/0x90 [ 38.929707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930359] [ 38.930569] The buggy address belongs to the object at ffff888009d35e80 [ 38.930569] which belongs to the cache vm_area_struct of size 168 [ 38.931949] The buggy address is located 88 bytes inside of [ 38.931949] freed 168-byte region [ffff888009d35e80, ffff888009d35f28) [ 38.933268] [ 38.933473] The buggy address belongs to the physical page: [ 38.934091] page:00000000ecd7e61d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d35 [ 38.935105] memcg:ffff88800e44a901 [ 38.935511] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.936180] page_type: 0xffffffff() [ 38.936610] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c3540 dead000000000005 [ 38.937479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e44a901 [ 38.938334] page dumped because: kasan: bad access detected [ 38.938969] [ 38.939172] Memory state around the buggy address: [ 38.939731] ffff888009d35d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.940604] ffff888009d35e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.941442] >ffff888009d35e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.942282] ^ [ 38.942994] ffff888009d35f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.943842] ffff888009d35f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.944700] ================================================================== [ 38.945739] Disabling lock debugging due to kernel taint [ 41.592879] BUG: Bad rss-counter state mm:0000000083bd91bb type:MM_FILEPAGES val:33 [ 41.594496] BUG: Bad rss-counter state mm:0000000083bd91bb type:MM_ANONPAGES val:22 [ 42.084249] BUG: Bad rss-counter state mm:00000000572ceb0c type:MM_FILEPAGES val:33 [ 42.085234] BUG: Bad rss-counter state mm:00000000572ceb0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37577' (ECDSA) to the list of known hosts. 2023/06/20 23:35:53 fuzzer started 2023/06/20 23:35:53 dialing manager at localhost:36067 2023/06/20 23:35:53 checking machine... 2023/06/20 23:35:53 checking revisions... [ 42.824457] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:35:53 testing simple program... [ 42.867302] cgroup: Unknown subsys name 'net' [ 42.922716] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:35:53 Registers: info registers vcpu 0 RAX=ffffffff818475d2 RBX=ffffffff813ad470 RCX=ffffffff8613f401 RDX=1ffff1100322ff37 RSI=ffffffff818475d2 RDI=ffff88801917fa28 RBP=ffff88801917f9f8 RSP=ffff88801917f958 R8 =ffffffff8613f412 R9 =ffff88801917f9a0 R10=0000000000038001 R11=0000000000021e7d R12=ffff88801917fa28 R13=0000000000000000 R14=ffff888016b50000 R15=ffff88800cb8e850 RIP=ffffffff813ad470 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 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=00007f30ce8d0000 CR3=000000001caac000 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=756e696c2d34365f3638782f62696c2f XMM01=7272652d67706762696c2f756e672d78 XMM02=00302e6f732e726f7272652d67706762 XMM03=696c2f756e672d78756e696c2d34365f XMM04=00000000000000000000000000000000 XMM05=00007f3f5aae3f6000007f3f5a8c6f30 XMM06=00007f3f5a8c6a2000007f3f5a8c6510 XMM07=00007f3f5a8c600000007f3f5aae4a20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffffffff846000aa RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff888019350000 R15=ffff88806cf09a70 RIP=ffffffff81130682 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 00007f0c66c25900 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=00007fff96147000 CR3=000000000e16a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000