syzkaller login: [ 36.365649] BUG: Bad rss-counter state mm:000000008e0bb5ca type:MM_FILEPAGES val:33 [ 36.366721] BUG: Bad rss-counter state mm:000000008e0bb5ca type:MM_ANONPAGES val:22 [ 36.421578] ================================================================== [ 36.422486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.423441] Read of size 8 at addr ffff88801a0b5df0 by task sshd/229 [ 36.424213] [ 36.424432] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.425295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.426269] Call Trace: [ 36.426589] [ 36.426884] dump_stack_lvl+0x91/0xf0 [ 36.427381] print_report+0xcc/0x620 [ 36.427861] ? __virt_addr_valid+0x102/0x340 [ 36.428410] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.429036] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.429645] kasan_report+0xbe/0xf0 [ 36.430125] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.430748] vma_interval_tree_remove+0xc75/0xec0 [ 36.431370] vma_prepare+0xc54/0x11a0 [ 36.431846] __split_vma+0x5af/0x950 [ 36.432315] ? __pfx___split_vma+0x10/0x10 [ 36.432840] ? find_held_lock+0x2c/0x110 [ 36.433355] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.433911] ? lock_is_held_type+0x9f/0x120 [ 36.434449] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.435059] ? mtree_range_walk+0x632/0x900 [ 36.435604] ? mas_walk+0x5c7/0x7c0 [ 36.436065] do_vmi_munmap+0x1f1/0x2b0 [ 36.436538] mmap_region+0x1f9/0x2660 [ 36.437049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.437597] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.438321] ? __pfx_lock_acquire+0x10/0x10 [ 36.438869] ? __pfx_mmap_region+0x10/0x10 [ 36.439415] ? security_mmap_addr+0x7d/0xa0 [ 36.439959] ? get_unmapped_area+0x1f5/0x3f0 [ 36.440523] do_mmap+0x854/0xf00 [ 36.440978] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.441482] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.442056] ksys_mmap_pgoff+0x3af/0x500 [ 36.442570] do_syscall_64+0x3f/0x90 [ 36.443070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.443724] RIP: 0033:0x7f6d4ececd82 [ 36.444203] 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 [ 36.446429] RSP: 002b:00007ffd1393e708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.447360] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d4ececd82 [ 36.448214] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d4e126000 [ 36.449078] RBP: 00007f6d4e126000 R08: 0000000000000009 R09: 0000000000001000 [ 36.449940] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561407688b20 [ 36.450805] R13: 00007ffd1393e720 R14: 00007ffd1393e750 R15: 00007ffd1393eab0 [ 36.451669] [ 36.451968] [ 36.452188] Allocated by task 222: [ 36.452620] kasan_save_stack+0x22/0x50 [ 36.453130] kasan_set_track+0x25/0x30 [ 36.453636] __kasan_slab_alloc+0x59/0x70 [ 36.454163] kmem_cache_alloc+0x16b/0x370 [ 36.454677] vm_area_dup+0x20/0x160 [ 36.455159] __split_vma+0x170/0x950 [ 36.455627] split_vma+0xc6/0x110 [ 36.456076] mprotect_fixup+0x8d2/0xb30 [ 36.456583] do_mprotect_pkey+0x87e/0xd40 [ 36.457120] __x64_sys_mprotect+0x78/0xc0 [ 36.457645] do_syscall_64+0x3f/0x90 [ 36.458132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.458761] [ 36.458989] Freed by task 222: [ 36.459385] kasan_save_stack+0x22/0x50 [ 36.459901] kasan_set_track+0x25/0x30 [ 36.460405] kasan_save_free_info+0x2b/0x50 [ 36.460953] __kasan_slab_free+0x10a/0x190 [ 36.461485] kmem_cache_free+0x10d/0x4d0 [ 36.461992] rcu_core+0x8c8/0x2860 [ 36.462445] __do_softirq+0x1b7/0x7d4 [ 36.462942] [ 36.463156] Last potentially related work creation: [ 36.463743] kasan_save_stack+0x22/0x50 [ 36.464244] __kasan_record_aux_stack+0x8e/0xa0 [ 36.464809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.465445] remove_vma+0x139/0x170 [ 36.465900] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.466449] do_vmi_munmap+0x1f1/0x2b0 [ 36.466942] __vm_munmap+0x138/0x3a0 [ 36.467404] __x64_sys_munmap+0x59/0x80 [ 36.467908] do_syscall_64+0x3f/0x90 [ 36.468367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.469002] [ 36.469208] The buggy address belongs to the object at ffff88801a0b5d98 [ 36.469208] which belongs to the cache vm_area_struct of size 168 [ 36.470687] The buggy address is located 88 bytes inside of [ 36.470687] freed 168-byte region [ffff88801a0b5d98, ffff88801a0b5e40) [ 36.472092] [ 36.472311] The buggy address belongs to the physical page: [ 36.472979] page:00000000157e99fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0b5 [ 36.474066] memcg:ffff88800fb5e001 [ 36.474487] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.475130] page_type: 0xffffffff() [ 36.475590] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.476526] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb5e001 [ 36.477427] page dumped because: kasan: bad access detected [ 36.478095] [ 36.478316] Memory state around the buggy address: [ 36.478920] ffff88801a0b5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.479770] ffff88801a0b5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.480619] >ffff88801a0b5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.481485] ^ [ 36.482281] ffff88801a0b5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.483136] ffff88801a0b5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.483976] ================================================================== [ 36.485242] Disabling lock debugging due to kernel taint [ 38.627284] BUG: Bad rss-counter state mm:00000000f1859757 type:MM_FILEPAGES val:33 [ 38.628773] BUG: Bad rss-counter state mm:00000000f1859757 type:MM_ANONPAGES val:22 [ 39.119209] BUG: Bad rss-counter state mm:00000000a53c713b type:MM_FILEPAGES val:33 [ 39.120225] BUG: Bad rss-counter state mm:00000000a53c713b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34568' (ECDSA) to the list of known hosts. 2023/06/19 18:12:25 fuzzer started 2023/06/19 18:12:25 dialing manager at localhost:44161 2023/06/19 18:12:25 checking machine... 2023/06/19 18:12:25 checking revisions... [ 39.782615] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:12:25 testing simple program... [ 39.819627] cgroup: Unknown subsys name 'net' [ 39.856079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:12:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff81370a3a RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a88 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888018f30000 R15=ffff88800c7b0b30 RIP=ffffffff813ad42f RFL=00000286 [--S--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 00007fb327445900 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=00007fb3279fc618 CR3=000000000d460000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f1b1dec6300 CR3=000000000dc86000 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=32313a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3833325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303531 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000