syzkaller login: [ 30.560490] BUG: Bad rss-counter state mm:00000000d43ca9ee type:MM_FILEPAGES val:33 [ 30.561591] BUG: Bad rss-counter state mm:00000000d43ca9ee type:MM_ANONPAGES val:22 [ 30.719983] ================================================================== [ 30.721063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.722196] Read of size 8 at addr ffff88800fd544e0 by task sshd/220 [ 30.723127] [ 30.723565] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.724611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.725810] Call Trace: [ 30.726173] [ 30.726461] dump_stack_lvl+0x91/0xf0 [ 30.726965] print_report+0xcc/0x620 [ 30.727454] ? __virt_addr_valid+0x102/0x340 [ 30.728022] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728649] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729286] kasan_report+0xbe/0xf0 [ 30.729787] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730409] vma_interval_tree_remove+0xc75/0xec0 [ 30.731023] vma_prepare+0xc54/0x11a0 [ 30.731507] __split_vma+0x5af/0x950 [ 30.731987] ? __pfx___split_vma+0x10/0x10 [ 30.732534] ? find_held_lock+0x2c/0x110 [ 30.733059] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.733624] ? lock_is_held_type+0x9f/0x120 [ 30.734185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.734798] ? mtree_range_walk+0x632/0x900 [ 30.735362] ? mas_walk+0x5c7/0x7c0 [ 30.735839] do_vmi_munmap+0x1f1/0x2b0 [ 30.736347] mmap_region+0x1f9/0x2660 [ 30.736834] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.737368] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.738154] ? __pfx_lock_acquire+0x10/0x10 [ 30.738732] ? __pfx_mmap_region+0x10/0x10 [ 30.739282] ? security_mmap_addr+0x7d/0xa0 [ 30.739817] ? get_unmapped_area+0x1f5/0x3f0 [ 30.740368] do_mmap+0x854/0xf00 [ 30.740814] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.741309] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.741893] ksys_mmap_pgoff+0x3af/0x500 [ 30.742413] do_syscall_64+0x3f/0x90 [ 30.742904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743571] RIP: 0033:0x7fe64f814d82 [ 30.744036] 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 [ 30.746220] RSP: 002b:00007ffd9f2b4fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.747134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe64f814d82 [ 30.747984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe64ec4e000 [ 30.748831] RBP: 00007fe64ec4e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.749676] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f948f7f70 [ 30.750540] R13: 00007ffd9f2b4fd0 R14: 00007ffd9f2b5000 R15: 00007ffd9f2b5360 [ 30.751401] [ 30.751698] [ 30.751916] Allocated by task 213: [ 30.752347] kasan_save_stack+0x22/0x50 [ 30.752861] kasan_set_track+0x25/0x30 [ 30.753364] __kasan_slab_alloc+0x59/0x70 [ 30.753903] kmem_cache_alloc+0x16b/0x370 [ 30.754419] vm_area_dup+0x20/0x160 [ 30.754887] __split_vma+0x170/0x950 [ 30.755361] split_vma+0xc6/0x110 [ 30.755805] mprotect_fixup+0x8d2/0xb30 [ 30.756315] do_mprotect_pkey+0x87e/0xd40 [ 30.756841] __x64_sys_mprotect+0x78/0xc0 [ 30.757374] do_syscall_64+0x3f/0x90 [ 30.757868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758516] [ 30.758739] Freed by task 210: [ 30.759133] kasan_save_stack+0x22/0x50 [ 30.759652] kasan_set_track+0x25/0x30 [ 30.760170] kasan_save_free_info+0x2b/0x50 [ 30.760716] __kasan_slab_free+0x10a/0x190 [ 30.761285] kmem_cache_free+0x10d/0x4d0 [ 30.761832] rcu_core+0x8c8/0x2860 [ 30.762295] __do_softirq+0x1b7/0x7d4 [ 30.762776] [ 30.762998] Last potentially related work creation: [ 30.763591] kasan_save_stack+0x22/0x50 [ 30.764093] __kasan_record_aux_stack+0x8e/0xa0 [ 30.764672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765343] remove_vma+0x139/0x170 [ 30.765817] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.766394] do_vmi_munmap+0x1f1/0x2b0 [ 30.766902] __vm_munmap+0x138/0x3a0 [ 30.767401] __x64_sys_munmap+0x59/0x80 [ 30.767897] do_syscall_64+0x3f/0x90 [ 30.768373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769017] [ 30.769238] The buggy address belongs to the object at ffff88800fd54488 [ 30.769238] which belongs to the cache vm_area_struct of size 168 [ 30.770759] The buggy address is located 88 bytes inside of [ 30.770759] freed 168-byte region [ffff88800fd54488, ffff88800fd54530) [ 30.772185] [ 30.772399] The buggy address belongs to the physical page: [ 30.773075] page:000000007ab46f4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd54 [ 30.774201] memcg:ffff88800cb0b101 [ 30.774639] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.775313] page_type: 0xffffffff() [ 30.775781] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.776719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb0b101 [ 30.777636] page dumped because: kasan: bad access detected [ 30.778320] [ 30.778539] Memory state around the buggy address: [ 30.779124] ffff88800fd54380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.779979] ffff88800fd54400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.780850] >ffff88800fd54480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.781747] ^ [ 30.782511] ffff88800fd54500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.783375] ffff88800fd54580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.784271] ================================================================== [ 30.785428] Disabling lock debugging due to kernel taint [ 32.749506] BUG: Bad rss-counter state mm:000000002d4d0488 type:MM_FILEPAGES val:33 [ 32.750556] BUG: Bad rss-counter state mm:000000002d4d0488 type:MM_ANONPAGES val:22 [ 33.227072] BUG: Bad rss-counter state mm:000000007f2ccb48 type:MM_FILEPAGES val:33 [ 33.228122] BUG: Bad rss-counter state mm:000000007f2ccb48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38091' (ECDSA) to the list of known hosts. 2023/06/20 14:01:21 fuzzer started 2023/06/20 14:01:21 dialing manager at localhost:36067 2023/06/20 14:01:21 checking machine... 2023/06/20 14:01:21 checking revisions... [ 33.933966] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:01:21 testing simple program... [ 33.986569] cgroup: Unknown subsys name 'net' [ 34.036442] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:01:21 Registers: info registers vcpu 0 RAX=00007f05500002f0 RBX=0000000000000270 RCX=00007f05500002f0 RDX=00007f0550000300 RSI=0000000000000270 RDI=00007f0550000020 RBP=0000000000000280 RSP=00007f05575215e0 R8 =0000000000000014 R9 =0000000000000640 R10=a3d70a3d70a3d70b R11=2ce33e6c02ce33e7 R12=00007f0550000020 R13=0000000000000028 R14=00007f0550000ba0 R15=00007f0550007130 RIP=00007f055793e5bd RFL=00000287 [--S--PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0557525700 00000000 00000000 GS =0000 0000000000000000 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=00007fca94ba39b0 CR3=00000000094f2000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363538 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000201 RBX=0000000000000002 RCX=ffffffff83c5c590 RDX=ffff88801029d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff84da7040 RSP=ffff88801a5e7550 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000000 R11=000006d6000006d6 R12=0000000000000000 R13=0000000000000005 R14=0000000000000003 R15=ffff88800d624b40 RIP=ffffffff814c0261 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f644e00b900 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=00007ffddbbd2ff8 CR3=0000000017cf4000 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