syzkaller login: [ 28.799025] BUG: Bad rss-counter state mm:000000000a490ab1 type:MM_FILEPAGES val:33 [ 28.799947] BUG: Bad rss-counter state mm:000000000a490ab1 type:MM_ANONPAGES val:22 [ 28.966090] ================================================================== [ 28.967175] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.968406] Read of size 8 at addr ffff88800e3963f8 by task sshd/221 [ 28.969327] [ 28.969548] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.970419] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.971416] Call Trace: [ 28.971738] [ 28.972022] dump_stack_lvl+0x91/0xf0 [ 28.972518] print_report+0xcc/0x620 [ 28.973006] ? __virt_addr_valid+0x102/0x340 [ 28.973564] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.974178] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.974786] kasan_report+0xbe/0xf0 [ 28.975269] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.975890] vma_interval_tree_remove+0xc75/0xec0 [ 28.976494] vma_prepare+0xc54/0x11a0 [ 28.976971] __split_vma+0x5af/0x950 [ 28.977441] ? __pfx___split_vma+0x10/0x10 [ 28.977964] ? find_held_lock+0x2c/0x110 [ 28.978485] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.979069] ? lock_is_held_type+0x9f/0x120 [ 28.979602] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.980206] ? mtree_range_walk+0x632/0x900 [ 28.980761] ? mas_walk+0x5c7/0x7c0 [ 28.981237] do_vmi_munmap+0x1f1/0x2b0 [ 28.981726] mmap_region+0x1f9/0x2660 [ 28.982208] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.982714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.983440] ? __pfx_lock_acquire+0x10/0x10 [ 28.983976] ? __pfx_mmap_region+0x10/0x10 [ 28.984507] ? security_mmap_addr+0x7d/0xa0 [ 28.985039] ? get_unmapped_area+0x1f5/0x3f0 [ 28.985592] do_mmap+0x854/0xf00 [ 28.986029] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.986519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.987103] ksys_mmap_pgoff+0x3af/0x500 [ 28.987608] do_syscall_64+0x3f/0x90 [ 28.988089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.988742] RIP: 0033:0x7f64a016cd82 [ 28.989191] 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 [ 28.991307] RSP: 002b:00007ffdcdbacba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.992202] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64a016cd82 [ 28.993050] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f649f5a6000 [ 28.993892] RBP: 00007f649f5a6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.994735] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564387829ec0 [ 28.995601] R13: 00007ffdcdbacbc0 R14: 00007ffdcdbacbf0 R15: 00007ffdcdbacf50 [ 28.996453] [ 28.996741] [ 28.996957] Allocated by task 214: [ 28.997387] kasan_save_stack+0x22/0x50 [ 28.997890] kasan_set_track+0x25/0x30 [ 28.998385] __kasan_slab_alloc+0x59/0x70 [ 28.998909] kmem_cache_alloc+0x16b/0x370 [ 28.999454] vm_area_dup+0x20/0x160 [ 28.999904] __split_vma+0x170/0x950 [ 29.000369] split_vma+0xc6/0x110 [ 29.000813] mprotect_fixup+0x8d2/0xb30 [ 29.001319] do_mprotect_pkey+0x87e/0xd40 [ 29.001837] __x64_sys_mprotect+0x78/0xc0 [ 29.002361] do_syscall_64+0x3f/0x90 [ 29.002839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.003497] [ 29.003713] Freed by task 214: [ 29.004099] kasan_save_stack+0x22/0x50 [ 29.004600] kasan_set_track+0x25/0x30 [ 29.005093] kasan_save_free_info+0x2b/0x50 [ 29.005631] __kasan_slab_free+0x10a/0x190 [ 29.006165] kmem_cache_free+0x10d/0x4d0 [ 29.006672] rcu_core+0x8c8/0x2860 [ 29.007124] __do_softirq+0x1b7/0x7d4 [ 29.007606] [ 29.007822] Last potentially related work creation: [ 29.008405] kasan_save_stack+0x22/0x50 [ 29.008907] __kasan_record_aux_stack+0x8e/0xa0 [ 29.009473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.010209] remove_vma+0x139/0x170 [ 29.010656] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.011222] do_vmi_munmap+0x1f1/0x2b0 [ 29.011704] __vm_munmap+0x138/0x3a0 [ 29.012176] __x64_sys_munmap+0x59/0x80 [ 29.012672] do_syscall_64+0x3f/0x90 [ 29.013144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.013785] [ 29.013998] The buggy address belongs to the object at ffff88800e3963a0 [ 29.013998] which belongs to the cache vm_area_struct of size 168 [ 29.015463] The buggy address is located 88 bytes inside of [ 29.015463] freed 168-byte region [ffff88800e3963a0, ffff88800e396448) [ 29.016891] [ 29.017105] The buggy address belongs to the physical page: [ 29.017760] page:00000000aaf188c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe396 [ 29.018851] memcg:ffff888018e73501 [ 29.019290] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.019926] page_type: 0xffffffff() [ 29.020377] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.021294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e73501 [ 29.022201] page dumped because: kasan: bad access detected [ 29.022861] [ 29.023083] Memory state around the buggy address: [ 29.023658] ffff88800e396280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.024512] ffff88800e396300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.025386] >ffff88800e396380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.026234] ^ [ 29.027083] ffff88800e396400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.027936] ffff88800e396480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.028784] ================================================================== [ 29.029823] Disabling lock debugging due to kernel taint [ 31.024002] BUG: Bad rss-counter state mm:00000000551762df type:MM_FILEPAGES val:33 [ 31.024908] BUG: Bad rss-counter state mm:00000000551762df type:MM_ANONPAGES val:22 [ 31.491512] BUG: Bad rss-counter state mm:0000000062ed8afc type:MM_FILEPAGES val:33 [ 31.492523] BUG: Bad rss-counter state mm:0000000062ed8afc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29587' (ECDSA) to the list of known hosts. 2023/06/21 01:59:24 fuzzer started 2023/06/21 01:59:24 dialing manager at localhost:36067 2023/06/21 01:59:24 checking machine... 2023/06/21 01:59:24 checking revisions... [ 32.227693] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:59:24 testing simple program... [ 32.269850] cgroup: Unknown subsys name 'net' [ 32.326144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:59:24 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81efcf42 RDI=ffff888015b49f34 RBP=ffff888015b49b40 RSP=ffff88800b9afb88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000001 R12=0000000000000004 R13=0000000000000032 R14=0000000000000001 R15=ffff88800b9afc20 RIP=ffffffff8135bd96 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 00007f49ae2e1900 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=00007f49ae29501c CR3=000000000b396000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001b46ad1 RBX=ffff88800da35658 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800da35688 RBP=ffff88800fdeae00 RSP=ffff88800edf7888 R8 =0000000000000001 R9 =ffffed1001dbef05 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800fdfc800 R14=ffffffff8367562f R15=ffff88800cbd4900 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f5ab62b2900 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=00007f5ab5701cb0 CR3=000000000eeb8000 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=53e8cf387069ebbab14af369ff0b43dd XMM02=eff9b2d0a8fce9cb000000000011a6a8 XMM03=2c67c8bc2e329bc3000000000011a7d0 XMM04=7dce0515405fe05300000000000ae988 XMM05=40a0a9beae0c656a0000000000132fc8 XMM06=e4cb8bb95a7664b60000000000131e60 XMM07=fb795ef6d65770560000000000122078 XMM08=2c67c8bc2e329bc3000000000011a7d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000