syzkaller login: [ 54.359633] BUG: Bad rss-counter state mm:0000000005c22cf6 type:MM_FILEPAGES val:33 [ 54.360607] BUG: Bad rss-counter state mm:0000000005c22cf6 type:MM_ANONPAGES val:22 [ 54.524439] ================================================================== [ 54.525298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.526182] Read of size 8 at addr ffff88800edf9058 by task sshd/219 [ 54.526901] [ 54.527113] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.528023] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.528938] Call Trace: [ 54.529243] [ 54.529527] dump_stack_lvl+0x91/0xf0 [ 54.529987] print_report+0xcc/0x620 [ 54.530441] ? __virt_addr_valid+0x102/0x340 [ 54.530962] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.531551] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.532130] kasan_report+0xbe/0xf0 [ 54.532577] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.533164] vma_interval_tree_remove+0xc75/0xec0 [ 54.533726] vma_prepare+0xc54/0x11a0 [ 54.534189] __split_vma+0x5af/0x950 [ 54.534649] ? __pfx___split_vma+0x10/0x10 [ 54.535181] ? find_held_lock+0x2c/0x110 [ 54.535728] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.536298] ? lock_is_held_type+0x9f/0x120 [ 54.536826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.537425] ? mtree_range_walk+0x632/0x900 [ 54.537980] ? mas_walk+0x5c7/0x7c0 [ 54.538452] do_vmi_munmap+0x1f1/0x2b0 [ 54.538939] mmap_region+0x1f9/0x2660 [ 54.539435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.539931] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.540636] ? __pfx_lock_acquire+0x10/0x10 [ 54.541163] ? __pfx_mmap_region+0x10/0x10 [ 54.541689] ? security_mmap_addr+0x7d/0xa0 [ 54.542216] ? get_unmapped_area+0x1f5/0x3f0 [ 54.542760] do_mmap+0x854/0xf00 [ 54.543195] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.543675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.544239] ksys_mmap_pgoff+0x3af/0x500 [ 54.544739] do_syscall_64+0x3f/0x90 [ 54.545218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.545856] RIP: 0033:0x7fc974454d82 [ 54.546313] 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 [ 54.548421] RSP: 002b:00007ffcfa2a0918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.549316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc974454d82 [ 54.550150] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc97388e000 [ 54.550985] RBP: 00007fc97388e000 R08: 0000000000000009 R09: 0000000000001000 [ 54.551829] R10: 0000000000000812 R11: 0000000000000206 R12: 000056105a4dcec0 [ 54.552665] R13: 00007ffcfa2a0930 R14: 00007ffcfa2a0960 R15: 00007ffcfa2a0cc0 [ 54.553514] [ 54.553805] [ 54.554012] Allocated by task 212: [ 54.554433] kasan_save_stack+0x22/0x50 [ 54.554930] kasan_set_track+0x25/0x30 [ 54.555425] __kasan_slab_alloc+0x59/0x70 [ 54.555954] kmem_cache_alloc+0x16b/0x370 [ 54.556464] vm_area_dup+0x20/0x160 [ 54.556909] __split_vma+0x170/0x950 [ 54.557370] split_vma+0xc6/0x110 [ 54.557810] mprotect_fixup+0x8d2/0xb30 [ 54.558311] do_mprotect_pkey+0x87e/0xd40 [ 54.558831] __x64_sys_mprotect+0x78/0xc0 [ 54.559344] do_syscall_64+0x3f/0x90 [ 54.559840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.560473] [ 54.560684] Freed by task 13: [ 54.561071] kasan_save_stack+0x22/0x50 [ 54.561564] kasan_set_track+0x25/0x30 [ 54.562058] kasan_save_free_info+0x2b/0x50 [ 54.562584] __kasan_slab_free+0x10a/0x190 [ 54.563121] kmem_cache_free+0x10d/0x4d0 [ 54.563637] rcu_core+0x8c8/0x2860 [ 54.564080] __do_softirq+0x1b7/0x7d4 [ 54.564551] [ 54.564773] Last potentially related work creation: [ 54.565363] kasan_save_stack+0x22/0x50 [ 54.565868] __kasan_record_aux_stack+0x8e/0xa0 [ 54.566451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.567097] remove_vma+0x139/0x170 [ 54.567553] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.568118] do_vmi_munmap+0x1f1/0x2b0 [ 54.568605] __vm_munmap+0x138/0x3a0 [ 54.569073] __x64_sys_munmap+0x59/0x80 [ 54.569564] do_syscall_64+0x3f/0x90 [ 54.570032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.570665] [ 54.570878] Second to last potentially related work creation: [ 54.571579] kasan_save_stack+0x22/0x50 [ 54.572095] __kasan_record_aux_stack+0x8e/0xa0 [ 54.572678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.573328] remove_vma+0x139/0x170 [ 54.573790] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.574351] do_vmi_munmap+0x1f1/0x2b0 [ 54.574833] mmap_region+0x1f9/0x2660 [ 54.575308] do_mmap+0x854/0xf00 [ 54.575746] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.576241] ksys_mmap_pgoff+0x3af/0x500 [ 54.576743] do_syscall_64+0x3f/0x90 [ 54.577228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.577869] [ 54.578088] The buggy address belongs to the object at ffff88800edf9000 [ 54.578088] which belongs to the cache vm_area_struct of size 168 [ 54.579569] The buggy address is located 88 bytes inside of [ 54.579569] freed 168-byte region [ffff88800edf9000, ffff88800edf90a8) [ 54.580982] [ 54.581206] The buggy address belongs to the physical page: [ 54.581884] page:000000001dec2c5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedf9 [ 54.582975] memcg:ffff88800d55da01 [ 54.583416] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.584066] page_type: 0xffffffff() [ 54.584519] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 54.585482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d55da01 [ 54.586434] page dumped because: kasan: bad access detected [ 54.587131] [ 54.587358] Memory state around the buggy address: [ 54.587979] ffff88800edf8f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 54.588882] ffff88800edf8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 54.589790] >ffff88800edf9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.590698] ^ [ 54.591485] ffff88800edf9080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 54.592402] ffff88800edf9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.593293] ================================================================== [ 54.594322] Disabling lock debugging due to kernel taint [ 56.868157] BUG: Bad rss-counter state mm:00000000e46bcfc6 type:MM_FILEPAGES val:33 [ 56.869568] BUG: Bad rss-counter state mm:00000000e46bcfc6 type:MM_ANONPAGES val:22 [ 57.433071] BUG: Bad rss-counter state mm:000000001b69c15c type:MM_FILEPAGES val:33 [ 57.434127] BUG: Bad rss-counter state mm:000000001b69c15c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54674' (ECDSA) to the list of known hosts. 2023/06/19 13:04:43 fuzzer started 2023/06/19 13:04:44 dialing manager at localhost:44161 2023/06/19 13:04:44 checking machine... 2023/06/19 13:04:44 checking revisions... [ 58.134772] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:04:44 testing simple program... [ 58.184531] cgroup: Unknown subsys name 'net' [ 58.239863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:04:19 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880191fe4c0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800e774000 RBP=ffff88800e774000 RSP=ffff888008d7fc88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000202 R13=ffff88800e774040 R14=ffffffff818d9dc6 R15=ffff88800dc6bd80 RIP=ffffffff812dffd4 RFL=00000082 [--S----] 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=00007fffd11bd8bc CR3=000000000db90000 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=00000000000000000000000000000000 XMM02=b9625d20367c13cfa4e20a70b7a8743b XMM03=1ae65f81c6be2326f8e7e96a3bc4c97e XMM04=063056e2beaa43c8765871cc45b063ff XMM05=00000000000000000000000000000000 XMM06=06305681beaa23267658716a3bb0637e XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc01b7 RBX=ffffffff85e00db8 RCX=ffffffff81846013 RDX=0000000000000000 RSI=ffffffff8613da9c RDI=ffffffff85e00db4 RBP=ffffffff85e00db4 RSP=ffff88806cf099e0 R8 =ffffffff8613da9c R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000021e78 R12=ffffffff85e00dbc R13=ffffffff85e00db4 R14=ffffffff85e00db4 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007fc921487900 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=00007fffd11be000 CR3=000000000db90000 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