syzkaller login: [ 42.363289] sshd (211) used greatest stack depth: 24128 bytes left [ 42.365445] BUG: Bad rss-counter state mm:00000000689ddc02 type:MM_FILEPAGES val:33 [ 42.366653] BUG: Bad rss-counter state mm:00000000689ddc02 type:MM_ANONPAGES val:22 [ 42.513948] ================================================================== [ 42.514911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.515876] Read of size 8 at addr ffff888016a35df0 by task sshd/218 [ 42.516823] [ 42.517066] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.517965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.518993] Call Trace: [ 42.519332] [ 42.519624] dump_stack_lvl+0x91/0xf0 [ 42.520128] print_report+0xcc/0x620 [ 42.520628] ? __virt_addr_valid+0x102/0x340 [ 42.521216] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.521849] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.522484] kasan_report+0xbe/0xf0 [ 42.522972] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.523626] vma_interval_tree_remove+0xc75/0xec0 [ 42.524261] vma_prepare+0xc54/0x11a0 [ 42.524760] __split_vma+0x5af/0x950 [ 42.525273] ? __pfx___split_vma+0x10/0x10 [ 42.525824] ? find_held_lock+0x2c/0x110 [ 42.526357] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.526946] ? lock_is_held_type+0x9f/0x120 [ 42.527501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.528143] ? mtree_range_walk+0x632/0x900 [ 42.528721] ? mas_walk+0x5c7/0x7c0 [ 42.529249] do_vmi_munmap+0x1f1/0x2b0 [ 42.529761] mmap_region+0x1f9/0x2660 [ 42.530265] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.530803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.531553] ? __pfx_lock_acquire+0x10/0x10 [ 42.532105] ? __pfx_mmap_region+0x10/0x10 [ 42.532648] ? security_mmap_addr+0x7d/0xa0 [ 42.533223] ? get_unmapped_area+0x1f5/0x3f0 [ 42.533802] do_mmap+0x854/0xf00 [ 42.534261] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.534776] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.535362] ksys_mmap_pgoff+0x3af/0x500 [ 42.535899] do_syscall_64+0x3f/0x90 [ 42.536401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.537074] RIP: 0033:0x7f8111a62d82 [ 42.537581] 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 [ 42.539826] RSP: 002b:00007fffa67d16e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.540784] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8111a62d82 [ 42.541679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8110e9c000 [ 42.542570] RBP: 00007f8110e9c000 R08: 0000000000000009 R09: 0000000000001000 [ 42.543456] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651ee8daec0 [ 42.544330] R13: 00007fffa67d1700 R14: 00007fffa67d1730 R15: 00007fffa67d1a90 [ 42.545232] [ 42.545533] [ 42.545754] Allocated by task 211: [ 42.546199] kasan_save_stack+0x22/0x50 [ 42.546723] kasan_set_track+0x25/0x30 [ 42.547231] __kasan_slab_alloc+0x59/0x70 [ 42.547773] kmem_cache_alloc+0x16b/0x370 [ 42.548313] vm_area_dup+0x20/0x160 [ 42.548784] __split_vma+0x170/0x950 [ 42.549281] split_vma+0xc6/0x110 [ 42.549736] mprotect_fixup+0x8d2/0xb30 [ 42.550260] do_mprotect_pkey+0x87e/0xd40 [ 42.550807] __x64_sys_mprotect+0x78/0xc0 [ 42.551360] do_syscall_64+0x3f/0x90 [ 42.551849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.552514] [ 42.552734] Freed by task 211: [ 42.553173] kasan_save_stack+0x22/0x50 [ 42.553705] kasan_set_track+0x25/0x30 [ 42.554218] kasan_save_free_info+0x2b/0x50 [ 42.554769] __kasan_slab_free+0x10a/0x190 [ 42.555315] kmem_cache_free+0x10d/0x4d0 [ 42.555844] rcu_core+0x8c8/0x2860 [ 42.556294] __do_softirq+0x1b7/0x7d4 [ 42.556787] [ 42.557012] Last potentially related work creation: [ 42.557644] kasan_save_stack+0x22/0x50 [ 42.558169] __kasan_record_aux_stack+0x8e/0xa0 [ 42.558761] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.559432] remove_vma+0x139/0x170 [ 42.559902] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.560481] do_vmi_munmap+0x1f1/0x2b0 [ 42.560985] __vm_munmap+0x138/0x3a0 [ 42.561494] __x64_sys_munmap+0x59/0x80 [ 42.562012] do_syscall_64+0x3f/0x90 [ 42.562505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.563178] [ 42.563395] The buggy address belongs to the object at ffff888016a35d98 [ 42.563395] which belongs to the cache vm_area_struct of size 168 [ 42.564926] The buggy address is located 88 bytes inside of [ 42.564926] freed 168-byte region [ffff888016a35d98, ffff888016a35e40) [ 42.566365] [ 42.566582] The buggy address belongs to the physical page: [ 42.567246] page:00000000569d96ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a35 [ 42.568346] memcg:ffff88800e08e301 [ 42.568777] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.569491] page_type: 0xffffffff() [ 42.569936] raw: 0100000000000200 ffff88800879fc80 ffffea00005a8ac0 dead000000000003 [ 42.570866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e08e301 [ 42.571768] page dumped because: kasan: bad access detected [ 42.572432] [ 42.572649] Memory state around the buggy address: [ 42.573259] ffff888016a35c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.574118] ffff888016a35d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.574983] >ffff888016a35d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.575829] ^ [ 42.576634] ffff888016a35e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.577500] ffff888016a35e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.578347] ================================================================== [ 42.579469] Disabling lock debugging due to kernel taint [ 44.828820] BUG: Bad rss-counter state mm:000000003fd90970 type:MM_FILEPAGES val:33 [ 44.830019] BUG: Bad rss-counter state mm:000000003fd90970 type:MM_ANONPAGES val:22 [ 45.214030] BUG: Bad rss-counter state mm:00000000d656a9bc type:MM_FILEPAGES val:33 [ 45.215262] BUG: Bad rss-counter state mm:00000000d656a9bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64177' (ECDSA) to the list of known hosts. 2023/06/20 03:04:10 fuzzer started 2023/06/20 03:04:10 dialing manager at localhost:44161 2023/06/20 03:04:10 checking machine... 2023/06/20 03:04:10 checking revisions... [ 45.880474] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:04:11 testing simple program... [ 45.932231] cgroup: Unknown subsys name 'net' [ 45.998468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:04:03 Registers: info registers vcpu 0 RAX=1ffffffff0bbf8d4 RBX=ffffffff85dfc6a4 RCX=ffffffff8180995c RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a4 RSP=ffff88806ce099e0 R8 =ffffffff86137004 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fd7d86ea900 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=00007ffc9055c000 CR3=000000000e91e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e2fe70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c5fd3 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=00007fa43518a2a0 CR3=000000000fdac000 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=2030313a34303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a34303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000