syzkaller login: [ 32.377125] BUG: Bad rss-counter state mm:000000006a53eb39 type:MM_FILEPAGES val:33 [ 32.378564] BUG: Bad rss-counter state mm:000000006a53eb39 type:MM_ANONPAGES val:22 [ 32.525173] ================================================================== [ 32.526255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.527399] Read of size 8 at addr ffff88800cdc7c20 by task sshd/219 [ 32.528329] [ 32.528553] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.529415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.530396] Call Trace: [ 32.530713] [ 32.530995] dump_stack_lvl+0x91/0xf0 [ 32.531499] print_report+0xcc/0x620 [ 32.531990] ? __virt_addr_valid+0x102/0x340 [ 32.532531] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.533148] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.533774] kasan_report+0xbe/0xf0 [ 32.534254] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.534871] vma_interval_tree_remove+0xc75/0xec0 [ 32.535476] vma_prepare+0xc54/0x11a0 [ 32.535950] __split_vma+0x5af/0x950 [ 32.536416] ? __pfx___split_vma+0x10/0x10 [ 32.536944] ? find_held_lock+0x2c/0x110 [ 32.537456] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.538017] ? lock_is_held_type+0x9f/0x120 [ 32.538546] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.539147] ? mtree_range_walk+0x632/0x900 [ 32.539713] ? mas_walk+0x5c7/0x7c0 [ 32.540186] do_vmi_munmap+0x1f1/0x2b0 [ 32.540674] mmap_region+0x1f9/0x2660 [ 32.541156] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.541665] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.542378] ? __pfx_lock_acquire+0x10/0x10 [ 32.542911] ? __pfx_mmap_region+0x10/0x10 [ 32.543448] ? security_mmap_addr+0x7d/0xa0 [ 32.543970] ? get_unmapped_area+0x1f5/0x3f0 [ 32.544511] do_mmap+0x854/0xf00 [ 32.544957] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.545442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.546001] ksys_mmap_pgoff+0x3af/0x500 [ 32.546514] do_syscall_64+0x3f/0x90 [ 32.547011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.547658] RIP: 0033:0x7f7dc6032d82 [ 32.548113] 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 [ 32.550235] RSP: 002b:00007fffe4b71cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.551134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dc6032d82 [ 32.551997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7dc546c000 [ 32.552840] RBP: 00007f7dc546c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.553671] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f4697ad90 [ 32.554506] R13: 00007fffe4b71cd0 R14: 00007fffe4b71d00 R15: 00007fffe4b72060 [ 32.555361] [ 32.555650] [ 32.555863] Allocated by task 212: [ 32.556282] kasan_save_stack+0x22/0x50 [ 32.556780] kasan_set_track+0x25/0x30 [ 32.557272] __kasan_slab_alloc+0x59/0x70 [ 32.557795] kmem_cache_alloc+0x16b/0x370 [ 32.558299] vm_area_dup+0x20/0x160 [ 32.558749] __split_vma+0x170/0x950 [ 32.559231] split_vma+0xc6/0x110 [ 32.559663] mprotect_fixup+0x8d2/0xb30 [ 32.560160] do_mprotect_pkey+0x87e/0xd40 [ 32.560669] __x64_sys_mprotect+0x78/0xc0 [ 32.561181] do_syscall_64+0x3f/0x90 [ 32.561651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.562293] [ 32.562505] Freed by task 202: [ 32.562892] kasan_save_stack+0x22/0x50 [ 32.563396] kasan_set_track+0x25/0x30 [ 32.563892] kasan_save_free_info+0x2b/0x50 [ 32.564417] __kasan_slab_free+0x10a/0x190 [ 32.564942] kmem_cache_free+0x10d/0x4d0 [ 32.565442] rcu_core+0x8c8/0x2860 [ 32.565882] __do_softirq+0x1b7/0x7d4 [ 32.566353] [ 32.566571] Last potentially related work creation: [ 32.567148] kasan_save_stack+0x22/0x50 [ 32.567658] __kasan_record_aux_stack+0x8e/0xa0 [ 32.568225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.568856] remove_vma+0x139/0x170 [ 32.569301] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.569848] do_vmi_munmap+0x1f1/0x2b0 [ 32.570327] __vm_munmap+0x138/0x3a0 [ 32.570794] __x64_sys_munmap+0x59/0x80 [ 32.571288] do_syscall_64+0x3f/0x90 [ 32.571756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.572390] [ 32.572601] The buggy address belongs to the object at ffff88800cdc7bc8 [ 32.572601] which belongs to the cache vm_area_struct of size 168 [ 32.574042] The buggy address is located 88 bytes inside of [ 32.574042] freed 168-byte region [ffff88800cdc7bc8, ffff88800cdc7c70) [ 32.575490] [ 32.575707] The buggy address belongs to the physical page: [ 32.576366] page:000000009a004670 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcdc7 [ 32.577455] memcg:ffff8880096c4c01 [ 32.577886] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.578533] page_type: 0xffffffff() [ 32.578986] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.579929] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096c4c01 [ 32.580852] page dumped because: kasan: bad access detected [ 32.581525] [ 32.581738] Memory state around the buggy address: [ 32.582321] ffff88800cdc7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.583189] ffff88800cdc7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.584072] >ffff88800cdc7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.584922] ^ [ 32.585457] ffff88800cdc7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.586321] ffff88800cdc7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.587175] ================================================================== [ 32.588175] Disabling lock debugging due to kernel taint [ 34.693425] BUG: Bad rss-counter state mm:0000000052b19e1c type:MM_FILEPAGES val:33 [ 34.694622] BUG: Bad rss-counter state mm:0000000052b19e1c type:MM_ANONPAGES val:22 [ 35.116424] BUG: Bad rss-counter state mm:00000000560620a6 type:MM_FILEPAGES val:33 [ 35.117539] BUG: Bad rss-counter state mm:00000000560620a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3752' (ECDSA) to the list of known hosts. 2023/06/19 23:32:36 fuzzer started 2023/06/19 23:32:36 dialing manager at localhost:44161 2023/06/19 23:32:36 checking machine... 2023/06/19 23:32:36 checking revisions... [ 35.939123] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:32:36 testing simple program... [ 35.989421] cgroup: Unknown subsys name 'net' [ 36.043472] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:32:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888013f698f8 RCX=ffffffff8189dc10 RDX=ffff88800fc20000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801a197b58 RSP=ffff88801a197a00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000040 R11=0000000000000001 R12=0000000000000040 R13=ffff88801a197b28 R14=ffff88801a197b58 R15=ffff88801a197b20 RIP=ffffffff814c07e0 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 00007fea87018900 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=00007fea875cd650 CR3=000000001370e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007fb127cce2b0 CR3=000000000f6d0000 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=dac9d48e8dd647969b493f0b2d70828b XMM02=000000000011de18ec2efd57dc4c00df XMM03=000000000012402069012fdbffda79b3 XMM04=1f975e86249ef89400000000000ae988 XMM05=dfcdbad4f1609c3700000000001338e0 XMM06=c99c9ee8cf8a4f490000000000132ab8 XMM07=e042d86d42eb936e00000000001242a0 XMM08=69012fdbffda79b3000000000011de78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000