syzkaller login: [ 23.730260] BUG: Bad rss-counter state mm:0000000088508e63 type:MM_FILEPAGES val:33 [ 23.731660] BUG: Bad rss-counter state mm:0000000088508e63 type:MM_ANONPAGES val:22 [ 23.907078] ================================================================== [ 23.908067] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.909078] Read of size 8 at addr ffff8880097fb4e0 by task sshd/220 [ 23.910020] [ 23.910259] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.911175] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.912208] Call Trace: [ 23.912542] <TASK> [ 23.912831] dump_stack_lvl+0x91/0xf0 [ 23.913352] print_report+0xcc/0x620 [ 23.913858] ? __virt_addr_valid+0x102/0x340 [ 23.914431] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.915058] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.915716] kasan_report+0xbe/0xf0 [ 23.916221] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.916851] vma_interval_tree_remove+0xc75/0xec0 [ 23.917483] vma_prepare+0xc54/0x11a0 [ 23.917979] __split_vma+0x5af/0x950 [ 23.918468] ? __pfx___split_vma+0x10/0x10 [ 23.919015] ? find_held_lock+0x2c/0x110 [ 23.919569] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.920149] ? lock_is_held_type+0x9f/0x120 [ 23.920718] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.921353] ? mtree_range_walk+0x632/0x900 [ 23.921933] ? mas_walk+0x5c7/0x7c0 [ 23.922438] do_vmi_munmap+0x1f1/0x2b0 [ 23.922948] mmap_region+0x1f9/0x2660 [ 23.923500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.924036] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.924793] ? __pfx_lock_acquire+0x10/0x10 [ 23.925366] ? __pfx_mmap_region+0x10/0x10 [ 23.925909] ? security_mmap_addr+0x7d/0xa0 [ 23.926481] ? get_unmapped_area+0x1f5/0x3f0 [ 23.927077] do_mmap+0x854/0xf00 [ 23.927550] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.928058] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.928673] ksys_mmap_pgoff+0x3af/0x500 [ 23.929229] do_syscall_64+0x3f/0x90 [ 23.929724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.930401] RIP: 0033:0x7f28d9485d82 [ 23.930874] 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 [ 23.933091] RSP: 002b:00007fff0594ee98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.934046] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28d9485d82 [ 23.935013] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28d88bf000 [ 23.935923] RBP: 00007f28d88bf000 R08: 0000000000000009 R09: 0000000000001000 [ 23.936809] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635e4a0ab20 [ 23.937684] R13: 00007fff0594eeb0 R14: 00007fff0594eee0 R15: 00007fff0594f240 [ 23.938580] </TASK> [ 23.938882] [ 23.939126] Allocated by task 213: [ 23.939596] kasan_save_stack+0x22/0x50 [ 23.940117] kasan_set_track+0x25/0x30 [ 23.940631] __kasan_slab_alloc+0x59/0x70 [ 23.941175] kmem_cache_alloc+0x16b/0x370 [ 23.941714] vm_area_dup+0x20/0x160 [ 23.942199] __split_vma+0x170/0x950 [ 23.942694] split_vma+0xc6/0x110 [ 23.943192] mprotect_fixup+0x8d2/0xb30 [ 23.943738] do_mprotect_pkey+0x87e/0xd40 [ 23.944298] __x64_sys_mprotect+0x78/0xc0 [ 23.944840] do_syscall_64+0x3f/0x90 [ 23.945338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.946004] [ 23.946245] Freed by task 213: [ 23.946675] kasan_save_stack+0x22/0x50 [ 23.947372] kasan_set_track+0x25/0x30 [ 23.948035] kasan_save_free_info+0x2b/0x50 [ 23.948742] __kasan_slab_free+0x10a/0x190 [ 23.949441] kmem_cache_free+0x10d/0x4d0 [ 23.949964] rcu_core+0x8c8/0x2860 [ 23.950460] __do_softirq+0x1b7/0x7d4 [ 23.950958] [ 23.951211] Last potentially related work creation: [ 23.951823] kasan_save_stack+0x22/0x50 [ 23.952364] __kasan_record_aux_stack+0x8e/0xa0 [ 23.952961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.953654] remove_vma+0x139/0x170 [ 23.954136] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.954742] do_vmi_munmap+0x1f1/0x2b0 [ 23.955285] __vm_munmap+0x138/0x3a0 [ 23.955768] __x64_sys_munmap+0x59/0x80 [ 23.956285] do_syscall_64+0x3f/0x90 [ 23.956770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.957484] [ 23.957725] The buggy address belongs to the object at ffff8880097fb488 [ 23.957725] which belongs to the cache vm_area_struct of size 168 [ 23.959293] The buggy address is located 88 bytes inside of [ 23.959293] freed 168-byte region [ffff8880097fb488, ffff8880097fb530) [ 23.960755] [ 23.960984] The buggy address belongs to the physical page: [ 23.961685] page:0000000071d7ab3d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97fb [ 23.962856] memcg:ffff88800e53ef01 [ 23.963341] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.964082] page_type: 0xffffffff() [ 23.964554] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a8140 dead000000000005 [ 23.965506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e53ef01 [ 23.966449] page dumped because: kasan: bad access detected [ 23.967111] [ 23.967345] Memory state around the buggy address: [ 23.967930] ffff8880097fb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.968818] ffff8880097fb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.969764] >ffff8880097fb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.970655] ^ [ 23.971439] ffff8880097fb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.972325] ffff8880097fb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.973248] ================================================================== [ 23.974309] Disabling lock debugging due to kernel taint [ 25.989194] BUG: Bad rss-counter state mm:0000000049905d9b type:MM_FILEPAGES val:33 [ 25.990179] BUG: Bad rss-counter state mm:0000000049905d9b type:MM_ANONPAGES val:22 [ 26.471153] BUG: Bad rss-counter state mm:00000000d6f24071 type:MM_FILEPAGES val:33 [ 26.472192] BUG: Bad rss-counter state mm:00000000d6f24071 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31089' (ECDSA) to the list of known hosts. 2023/06/21 00:32:58 fuzzer started 2023/06/21 00:32:58 dialing manager at localhost:36067 2023/06/21 00:32:58 checking machine... 2023/06/21 00:32:58 checking revisions... [ 27.198723] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:32:58 testing simple program... [ 27.251449] cgroup: Unknown subsys name 'net' [ 27.299048] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:32:57 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff1100128bfb4 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=ffffffff818ca639 RDI=ffff88801859dd60 RBP=1ffff1100128bf96 RSP=ffff88800945fca0 R8 =0000000000000000 R9 =ffffed10030d7b31 R10=ffff8880186bd98b R11=00000000000b6a61 R12=ffff88801859dd60 R13=ffffffff818ca639 R14=ffffffff84d2fb80 R15=ffff888008f7a000 RIP=ffffffff812d8699 RFL=00000216 [----AP-] 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 00007fbf2f87d900 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=00007fbf2fe34618 CR3=000000001669e000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f8a0991b440 CR3=000000000c6a4000 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=bba39ed7ddb681827c49dc25b2b54451 XMM02=000000000011b6b0eff9b2d0a8fce9cb XMM03=000000000011b7802c67c8bc2e329bc3 XMM04=82327f4772d6743600000000000ae988 XMM05=19e9129bd510f2350000000000131890 XMM06=c746198b387b15550000000000130798 XMM07=e042d86d42eb936e0000000000121c88 XMM08=6da37362212bb153000000000011b780 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000