syzkaller login: [ 38.710924] BUG: Bad rss-counter state mm:00000000e216a842 type:MM_FILEPAGES val:33 [ 38.711941] BUG: Bad rss-counter state mm:00000000e216a842 type:MM_ANONPAGES val:22 [ 38.886757] ================================================================== [ 38.887846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.889041] Read of size 8 at addr ffff888016b32d08 by task sshd/220 [ 38.889942] [ 38.890192] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.891187] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.892333] Call Trace: [ 38.892696] [ 38.893020] dump_stack_lvl+0x91/0xf0 [ 38.893607] print_report+0xcc/0x620 [ 38.894160] ? __virt_addr_valid+0x102/0x340 [ 38.894780] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.895480] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896220] kasan_report+0xbe/0xf0 [ 38.896758] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897473] vma_interval_tree_remove+0xc75/0xec0 [ 38.898155] vma_prepare+0xc54/0x11a0 [ 38.898699] __split_vma+0x5af/0x950 [ 38.899236] ? __pfx___split_vma+0x10/0x10 [ 38.899873] ? find_held_lock+0x2c/0x110 [ 38.900470] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.901109] ? lock_is_held_type+0x9f/0x120 [ 38.901752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.902439] ? mtree_range_walk+0x632/0x900 [ 38.903067] ? mas_walk+0x5c7/0x7c0 [ 38.903610] do_vmi_munmap+0x1f1/0x2b0 [ 38.904216] mmap_region+0x1f9/0x2660 [ 38.904811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.905462] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.906366] ? __pfx_lock_acquire+0x10/0x10 [ 38.907029] ? __pfx_mmap_region+0x10/0x10 [ 38.907700] ? security_mmap_addr+0x7d/0xa0 [ 38.908382] ? get_unmapped_area+0x1f5/0x3f0 [ 38.909049] do_mmap+0x854/0xf00 [ 38.909608] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.910206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.910902] ksys_mmap_pgoff+0x3af/0x500 [ 38.911513] do_syscall_64+0x3f/0x90 [ 38.912135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912933] RIP: 0033:0x7fa4bb8add82 [ 38.913519] 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 [ 38.916192] RSP: 002b:00007ffe0d69c5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.917309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4bb8add82 [ 38.918379] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4bace7000 [ 38.919409] RBP: 00007fa4bace7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.920479] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d236e6d90 [ 38.921544] R13: 00007ffe0d69c5f0 R14: 00007ffe0d69c620 R15: 00007ffe0d69c980 [ 38.922638] [ 38.922999] [ 38.923261] Allocated by task 213: [ 38.923801] kasan_save_stack+0x22/0x50 [ 38.924458] kasan_set_track+0x25/0x30 [ 38.925065] __kasan_slab_alloc+0x59/0x70 [ 38.925728] kmem_cache_alloc+0x16b/0x370 [ 38.926375] vm_area_dup+0x20/0x160 [ 38.926938] __split_vma+0x170/0x950 [ 38.927510] split_vma+0xc6/0x110 [ 38.928005] mprotect_fixup+0x8d2/0xb30 [ 38.928527] do_mprotect_pkey+0x87e/0xd40 [ 38.929063] __x64_sys_mprotect+0x78/0xc0 [ 38.929631] do_syscall_64+0x3f/0x90 [ 38.930128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.930803] [ 38.931027] Freed by task 213: [ 38.931437] kasan_save_stack+0x22/0x50 [ 38.931998] kasan_set_track+0x25/0x30 [ 38.932518] kasan_save_free_info+0x2b/0x50 [ 38.933069] __kasan_slab_free+0x10a/0x190 [ 38.933637] kmem_cache_free+0x10d/0x4d0 [ 38.934167] rcu_core+0x8c8/0x2860 [ 38.934630] __do_softirq+0x1b7/0x7d4 [ 38.935128] [ 38.935351] Last potentially related work creation: [ 38.936000] kasan_save_stack+0x22/0x50 [ 38.936527] __kasan_record_aux_stack+0x8e/0xa0 [ 38.937121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.937801] remove_vma+0x139/0x170 [ 38.938279] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.938858] do_vmi_munmap+0x1f1/0x2b0 [ 38.939363] __vm_munmap+0x138/0x3a0 [ 38.939883] __x64_sys_munmap+0x59/0x80 [ 38.940402] do_syscall_64+0x3f/0x90 [ 38.940901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.941600] [ 38.941823] The buggy address belongs to the object at ffff888016b32cb0 [ 38.941823] which belongs to the cache vm_area_struct of size 168 [ 38.943361] The buggy address is located 88 bytes inside of [ 38.943361] freed 168-byte region [ffff888016b32cb0, ffff888016b32d58) [ 38.944867] [ 38.945091] The buggy address belongs to the physical page: [ 38.945804] page:00000000577f0c70 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b32 [ 38.946970] memcg:ffff88800e6b6101 [ 38.947409] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.948117] page_type: 0xffffffff() [ 38.948600] raw: 0100000000000200 ffff8880087a0c80 ffffea0000645a00 dead000000000002 [ 38.949585] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6b6101 [ 38.950541] page dumped because: kasan: bad access detected [ 38.951245] [ 38.951479] Memory state around the buggy address: [ 38.952133] ffff888016b32c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.953047] ffff888016b32c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.953980] >ffff888016b32d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.954883] ^ [ 38.955349] ffff888016b32d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.956291] ffff888016b32e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.957190] ================================================================== [ 38.958230] Disabling lock debugging due to kernel taint [ 40.895530] BUG: Bad rss-counter state mm:0000000055f877e7 type:MM_FILEPAGES val:33 [ 40.897127] BUG: Bad rss-counter state mm:0000000055f877e7 type:MM_ANONPAGES val:22 [ 41.425922] BUG: Bad rss-counter state mm:000000001cc74381 type:MM_FILEPAGES val:31 [ 41.427094] BUG: Bad rss-counter state mm:000000001cc74381 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9354' (ECDSA) to the list of known hosts. 2023/06/21 04:32:45 fuzzer started 2023/06/21 04:32:45 dialing manager at localhost:36067 2023/06/21 04:32:45 checking machine... 2023/06/21 04:32:45 checking revisions... [ 42.087223] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:32:45 testing simple program... [ 42.132606] cgroup: Unknown subsys name 'net' [ 42.173113] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:32:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8162a1ca RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea00005c1c00 RSP=ffff88801912f8f0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffea00005c1c34 R13=dffffc0000000000 R14=0000000000000000 R15=ffff88801912f938 RIP=ffffffff814c0864 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 00007face9824900 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=00007face9ddc0b0 CR3=000000000caf2000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fa17b6d3a60 CR3=0000000013a8a000 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=04c9aeb5fd0d68be4f404d0c44547276 XMM02=000000000011e780eff9b2d0a8fce9cb XMM03=000000000011e8502c67c8bc2e329bc3 XMM04=feec6f82c9fde0cf00000000000ae988 XMM05=19e9129bd510f2350000000000132f70 XMM06=f9e6a8427a261da20000000000132148 XMM07=e042d86d42eb936e0000000000123e20 XMM08=7f42a7eb8db81f89000000000011e850 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000