syzkaller login: [ 32.583067] BUG: Bad rss-counter state mm:00000000bc5b8291 type:MM_FILEPAGES val:33 [ 32.584533] BUG: Bad rss-counter state mm:00000000bc5b8291 type:MM_ANONPAGES val:22 [ 32.735036] ================================================================== [ 32.736113] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.737214] Read of size 8 at addr ffff88800c4eced8 by task sshd/220 [ 32.738318] [ 32.738581] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.739624] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.740812] Call Trace: [ 32.741172] [ 32.741454] dump_stack_lvl+0x91/0xf0 [ 32.741960] print_report+0xcc/0x620 [ 32.742444] ? __virt_addr_valid+0x102/0x340 [ 32.743012] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.743634] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.744247] kasan_report+0xbe/0xf0 [ 32.744722] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.745342] vma_interval_tree_remove+0xc75/0xec0 [ 32.745944] vma_prepare+0xc54/0x11a0 [ 32.746424] __split_vma+0x5af/0x950 [ 32.746907] ? __pfx___split_vma+0x10/0x10 [ 32.747463] ? find_held_lock+0x2c/0x110 [ 32.747995] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.748568] ? lock_is_held_type+0x9f/0x120 [ 32.749108] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.749719] ? mtree_range_walk+0x632/0x900 [ 32.750271] ? mas_walk+0x5c7/0x7c0 [ 32.750764] do_vmi_munmap+0x1f1/0x2b0 [ 32.751261] mmap_region+0x1f9/0x2660 [ 32.751753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.752273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.752996] ? __pfx_lock_acquire+0x10/0x10 [ 32.753535] ? __pfx_mmap_region+0x10/0x10 [ 32.754069] ? security_mmap_addr+0x7d/0xa0 [ 32.754605] ? get_unmapped_area+0x1f5/0x3f0 [ 32.755168] do_mmap+0x854/0xf00 [ 32.755605] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.756116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.756678] ksys_mmap_pgoff+0x3af/0x500 [ 32.757189] do_syscall_64+0x3f/0x90 [ 32.757666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.758325] RIP: 0033:0x7f4dfaed0d82 [ 32.758813] 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 [ 32.760945] RSP: 002b:00007ffcafdc1b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.761858] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4dfaed0d82 [ 32.762718] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4dfa30a000 [ 32.763570] RBP: 00007f4dfa30a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.764421] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633fefb2ec0 [ 32.765269] R13: 00007ffcafdc1b60 R14: 00007ffcafdc1b90 R15: 00007ffcafdc1ef0 [ 32.766136] [ 32.766429] [ 32.766652] Allocated by task 213: [ 32.767087] kasan_save_stack+0x22/0x50 [ 32.767593] kasan_set_track+0x25/0x30 [ 32.768090] __kasan_slab_alloc+0x59/0x70 [ 32.768618] kmem_cache_alloc+0x16b/0x370 [ 32.769141] vm_area_dup+0x20/0x160 [ 32.769600] __split_vma+0x170/0x950 [ 32.770067] split_vma+0xc6/0x110 [ 32.770514] mprotect_fixup+0x8d2/0xb30 [ 32.771034] do_mprotect_pkey+0x87e/0xd40 [ 32.771556] __x64_sys_mprotect+0x78/0xc0 [ 32.772083] do_syscall_64+0x3f/0x90 [ 32.772558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.773205] [ 32.773419] Freed by task 213: [ 32.773806] kasan_save_stack+0x22/0x50 [ 32.774319] kasan_set_track+0x25/0x30 [ 32.774826] kasan_save_free_info+0x2b/0x50 [ 32.775367] __kasan_slab_free+0x10a/0x190 [ 32.775906] kmem_cache_free+0x10d/0x4d0 [ 32.776416] rcu_core+0x8c8/0x2860 [ 32.776868] __do_softirq+0x1b7/0x7d4 [ 32.777351] [ 32.777568] Last potentially related work creation: [ 32.778161] kasan_save_stack+0x22/0x50 [ 32.778679] __kasan_record_aux_stack+0x8e/0xa0 [ 32.779256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.780001] remove_vma+0x139/0x170 [ 32.780454] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.781014] do_vmi_munmap+0x1f1/0x2b0 [ 32.781504] __vm_munmap+0x138/0x3a0 [ 32.781977] __x64_sys_munmap+0x59/0x80 [ 32.782481] do_syscall_64+0x3f/0x90 [ 32.782985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.783629] [ 32.783846] The buggy address belongs to the object at ffff88800c4ece80 [ 32.783846] which belongs to the cache vm_area_struct of size 168 [ 32.785333] The buggy address is located 88 bytes inside of [ 32.785333] freed 168-byte region [ffff88800c4ece80, ffff88800c4ecf28) [ 32.786774] [ 32.786992] The buggy address belongs to the physical page: [ 32.787653] page:00000000d1dd039e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4ec [ 32.788746] memcg:ffff88800e415f01 [ 32.789176] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.789819] page_type: 0xffffffff() [ 32.790270] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.791202] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e415f01 [ 32.792120] page dumped because: kasan: bad access detected [ 32.792792] [ 32.793011] Memory state around the buggy address: [ 32.793589] ffff88800c4ecd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.794458] ffff88800c4ece00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.795358] >ffff88800c4ece80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.796216] ^ [ 32.796947] ffff88800c4ecf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.797802] ffff88800c4ecf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.798677] ================================================================== [ 32.799762] Disabling lock debugging due to kernel taint [ 35.567076] BUG: Bad rss-counter state mm:00000000ca9fb8c7 type:MM_FILEPAGES val:33 [ 35.567826] BUG: Bad rss-counter state mm:00000000ca9fb8c7 type:MM_ANONPAGES val:22 [ 36.103495] BUG: Bad rss-counter state mm:00000000a8c64222 type:MM_FILEPAGES val:33 [ 36.104792] BUG: Bad rss-counter state mm:00000000a8c64222 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59000' (ECDSA) to the list of known hosts. 2023/06/20 03:29:35 fuzzer started 2023/06/20 03:29:35 dialing manager at localhost:44161 2023/06/20 03:29:35 checking machine... 2023/06/20 03:29:35 checking revisions... [ 36.740679] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:29:36 testing simple program... [ 36.792337] cgroup: Unknown subsys name 'net' [ 36.828854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:29:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff8880158c8000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff888008a9e910 RSP=ffff8880069277a8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=ffff88801be798f0 R13=ffff8880101a0000 R14=ffff8880101a0000 R15=ffff88800c0e0a38 RIP=ffffffff814c0384 RFL=00000246 [---Z-P-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd5a4e72900 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=00007fd5a42cefa0 CR3=000000000da18000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=14cf5e61a03896e300000000000ae988 XMM05=49a2c4081efc095b00000000001355a8 XMM06=19e9129bd510f2350000000000134460 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007f7a5b8660b0 CR3=0000000019e7c000 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=2035333a39323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a39323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000