syzkaller login: [ 39.361967] BUG: Bad rss-counter state mm:00000000ca4efcb7 type:MM_FILEPAGES val:33 [ 39.363651] BUG: Bad rss-counter state mm:00000000ca4efcb7 type:MM_ANONPAGES val:22 [ 39.535870] ================================================================== [ 39.536859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.537963] Read of size 8 at addr ffff8880099d1058 by task sshd/220 [ 39.538828] [ 39.539051] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.539976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.540975] Call Trace: [ 39.541310] [ 39.541634] dump_stack_lvl+0x91/0xf0 [ 39.542161] print_report+0xcc/0x620 [ 39.542655] ? __virt_addr_valid+0x102/0x340 [ 39.543199] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.543838] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.544498] kasan_report+0xbe/0xf0 [ 39.544983] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.545641] vma_interval_tree_remove+0xc75/0xec0 [ 39.546264] vma_prepare+0xc54/0x11a0 [ 39.546760] __split_vma+0x5af/0x950 [ 39.547239] ? __pfx___split_vma+0x10/0x10 [ 39.547787] ? find_held_lock+0x2c/0x110 [ 39.548340] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.548933] ? lock_is_held_type+0x9f/0x120 [ 39.549496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.550121] ? mtree_range_walk+0x632/0x900 [ 39.550703] ? mas_walk+0x5c7/0x7c0 [ 39.551188] do_vmi_munmap+0x1f1/0x2b0 [ 39.551703] mmap_region+0x1f9/0x2660 [ 39.552226] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.552769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.553513] ? __pfx_lock_acquire+0x10/0x10 [ 39.554057] ? __pfx_mmap_region+0x10/0x10 [ 39.554621] ? security_mmap_addr+0x7d/0xa0 [ 39.555168] ? get_unmapped_area+0x1f5/0x3f0 [ 39.555745] do_mmap+0x854/0xf00 [ 39.556215] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.556744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.557327] ksys_mmap_pgoff+0x3af/0x500 [ 39.557860] do_syscall_64+0x3f/0x90 [ 39.558347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.559013] RIP: 0033:0x7efcfc737d82 [ 39.559479] 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 [ 39.561694] RSP: 002b:00007fff469bacf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.562630] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcfc737d82 [ 39.563489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcfbb71000 [ 39.564363] RBP: 00007efcfbb71000 R08: 0000000000000009 R09: 0000000000001000 [ 39.565259] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a16216dec0 [ 39.566142] R13: 00007fff469bad10 R14: 00007fff469bad40 R15: 00007fff469bb0a0 [ 39.567031] [ 39.567328] [ 39.567556] Allocated by task 213: [ 39.567987] kasan_save_stack+0x22/0x50 [ 39.568535] kasan_set_track+0x25/0x30 [ 39.569039] __kasan_slab_alloc+0x59/0x70 [ 39.569580] kmem_cache_alloc+0x16b/0x370 [ 39.570107] vm_area_dup+0x20/0x160 [ 39.570583] __split_vma+0x170/0x950 [ 39.571062] split_vma+0xc6/0x110 [ 39.571522] mprotect_fixup+0x8d2/0xb30 [ 39.572028] do_mprotect_pkey+0x87e/0xd40 [ 39.572601] __x64_sys_mprotect+0x78/0xc0 [ 39.573134] do_syscall_64+0x3f/0x90 [ 39.573624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.574289] [ 39.574523] Freed by task 213: [ 39.574932] kasan_save_stack+0x22/0x50 [ 39.575458] kasan_set_track+0x25/0x30 [ 39.575960] kasan_save_free_info+0x2b/0x50 [ 39.576537] __kasan_slab_free+0x10a/0x190 [ 39.577083] kmem_cache_free+0x10d/0x4d0 [ 39.577607] rcu_core+0x8c8/0x2860 [ 39.578056] __do_softirq+0x1b7/0x7d4 [ 39.578605] [ 39.578826] Last potentially related work creation: [ 39.579452] kasan_save_stack+0x22/0x50 [ 39.579979] __kasan_record_aux_stack+0x8e/0xa0 [ 39.580603] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.581269] remove_vma+0x139/0x170 [ 39.581742] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.582324] do_vmi_munmap+0x1f1/0x2b0 [ 39.582845] __vm_munmap+0x138/0x3a0 [ 39.583316] __x64_sys_munmap+0x59/0x80 [ 39.583830] do_syscall_64+0x3f/0x90 [ 39.584325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.584996] [ 39.585214] Second to last potentially related work creation: [ 39.585918] kasan_save_stack+0x22/0x50 [ 39.586442] __kasan_record_aux_stack+0x8e/0xa0 [ 39.587039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.587714] remove_vma+0x139/0x170 [ 39.588176] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.588764] do_vmi_munmap+0x1f1/0x2b0 [ 39.589261] mmap_region+0x1f9/0x2660 [ 39.589767] do_mmap+0x854/0xf00 [ 39.590206] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.590709] ksys_mmap_pgoff+0x3af/0x500 [ 39.591226] do_syscall_64+0x3f/0x90 [ 39.591711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.592399] [ 39.592632] The buggy address belongs to the object at ffff8880099d1000 [ 39.592632] which belongs to the cache vm_area_struct of size 168 [ 39.594131] The buggy address is located 88 bytes inside of [ 39.594131] freed 168-byte region [ffff8880099d1000, ffff8880099d10a8) [ 39.595591] [ 39.595811] The buggy address belongs to the physical page: [ 39.596525] page:0000000010b2872a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99d1 [ 39.597632] memcg:ffff88800f632001 [ 39.598077] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.598750] page_type: 0xffffffff() [ 39.599219] raw: 0100000000000200 ffff88800879fc80 ffffea000031bc40 dead000000000004 [ 39.600169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f632001 [ 39.601126] page dumped because: kasan: bad access detected [ 39.601814] [ 39.602036] Memory state around the buggy address: [ 39.602640] ffff8880099d0f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 39.603536] ffff8880099d0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.604448] >ffff8880099d1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.605326] ^ [ 39.606069] ffff8880099d1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.606948] ffff8880099d1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.607821] ================================================================== [ 39.608804] Disabling lock debugging due to kernel taint [ 41.588394] BUG: Bad rss-counter state mm:000000006bca6889 type:MM_FILEPAGES val:33 [ 41.589983] BUG: Bad rss-counter state mm:000000006bca6889 type:MM_ANONPAGES val:22 [ 42.167320] BUG: Bad rss-counter state mm:000000000dfb43f2 type:MM_FILEPAGES val:33 [ 42.168663] BUG: Bad rss-counter state mm:000000000dfb43f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48949' (ECDSA) to the list of known hosts. 2023/06/20 04:22:22 fuzzer started 2023/06/20 04:22:23 dialing manager at localhost:44161 2023/06/20 04:22:23 checking machine... 2023/06/20 04:22:23 checking revisions... [ 42.821520] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:22:23 testing simple program... [ 42.875500] cgroup: Unknown subsys name 'net' [ 42.923774] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:22:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008c11aa0 RCX=0000000000000000 RDX=ffff888009b5d1c0 RSI=ffffffff818e9396 RDI=0000000000000004 RBP=0000000000000009 RSP=ffff888016327df8 R8 =0000000000000004 R9 =0000000000000040 R10=0000000000000009 R11=00000000000b6996 R12=ffff888008c11a40 R13=0000000000000040 R14=0000000000000000 R15=ffff888008c11a44 RIP=ffffffff818e93dd 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 00007fd840f29900 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=00007fd8414e0618 CR3=000000000e64c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000d RBX=0000000000000002 RCX=ffffffff813ad6cf RDX=000000000000000d RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffff88806cf09af0 RSP=ffff88806cf099f8 R8 =ffffffff860d68c0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8112fc20 RFL=00000212 [----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 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=00007efdf4c832b8 CR3=000000000d5d0000 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=07d20ade315ea69f6440aa27f50c7429 XMM02=000000000011dcf0ec2efd57dc4c00df XMM03=0000000000123f18fdca0852289ecb22 XMM04=fbfe481a0edaf4fa00000000000ae988 XMM05=19e9129bd510f2350000000000134b40 XMM06=0dff65749e7c577f0000000000133d18 XMM07=e042d86d42eb936e0000000000124198 XMM08=fdca0852289ecb22000000000011dd50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000