syzkaller login: [ 31.118188] BUG: Bad rss-counter state mm:0000000039817695 type:MM_FILEPAGES val:33 [ 31.119361] BUG: Bad rss-counter state mm:0000000039817695 type:MM_ANONPAGES val:22 [ 31.303682] ================================================================== [ 31.304618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.305551] Read of size 8 at addr ffff888009c5eed8 by task sshd/221 [ 31.306400] [ 31.306652] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.307500] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.308493] Call Trace: [ 31.308809] [ 31.309088] dump_stack_lvl+0x91/0xf0 [ 31.309572] print_report+0xcc/0x620 [ 31.310049] ? __virt_addr_valid+0x102/0x340 [ 31.310591] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.311207] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.311832] kasan_report+0xbe/0xf0 [ 31.312313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.312949] vma_interval_tree_remove+0xc75/0xec0 [ 31.313553] vma_prepare+0xc54/0x11a0 [ 31.314045] __split_vma+0x5af/0x950 [ 31.314526] ? __pfx___split_vma+0x10/0x10 [ 31.315063] ? find_held_lock+0x2c/0x110 [ 31.315585] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.316157] ? lock_is_held_type+0x9f/0x120 [ 31.316715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.317321] ? mtree_range_walk+0x632/0x900 [ 31.317873] ? mas_walk+0x5c7/0x7c0 [ 31.318346] do_vmi_munmap+0x1f1/0x2b0 [ 31.318836] mmap_region+0x1f9/0x2660 [ 31.319321] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.319855] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.320568] ? __pfx_lock_acquire+0x10/0x10 [ 31.321113] ? __pfx_mmap_region+0x10/0x10 [ 31.321661] ? security_mmap_addr+0x7d/0xa0 [ 31.322204] ? get_unmapped_area+0x1f5/0x3f0 [ 31.322747] do_mmap+0x854/0xf00 [ 31.323198] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.323692] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.324265] ksys_mmap_pgoff+0x3af/0x500 [ 31.324778] do_syscall_64+0x3f/0x90 [ 31.325263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.325928] RIP: 0033:0x7f75f5130d82 [ 31.326381] 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 [ 31.328550] RSP: 002b:00007ffed9a7ae98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.329472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75f5130d82 [ 31.330490] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75f456a000 [ 31.331528] RBP: 00007f75f456a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.332568] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a17f69eec0 [ 31.333828] R13: 00007ffed9a7aeb0 R14: 00007ffed9a7aee0 R15: 00007ffed9a7b240 [ 31.335189] [ 31.335651] [ 31.336030] Allocated by task 214: [ 31.336728] kasan_save_stack+0x22/0x50 [ 31.337529] kasan_set_track+0x25/0x30 [ 31.338247] __kasan_slab_alloc+0x59/0x70 [ 31.338876] kmem_cache_alloc+0x16b/0x370 [ 31.339500] vm_area_dup+0x20/0x160 [ 31.340054] __split_vma+0x170/0x950 [ 31.340616] split_vma+0xc6/0x110 [ 31.341135] mprotect_fixup+0x8d2/0xb30 [ 31.341732] do_mprotect_pkey+0x87e/0xd40 [ 31.342360] __x64_sys_mprotect+0x78/0xc0 [ 31.342984] do_syscall_64+0x3f/0x90 [ 31.343557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.344346] [ 31.344604] Freed by task 211: [ 31.345071] kasan_save_stack+0x22/0x50 [ 31.345674] kasan_set_track+0x25/0x30 [ 31.346263] kasan_save_free_info+0x2b/0x50 [ 31.346905] __kasan_slab_free+0x10a/0x190 [ 31.347544] kmem_cache_free+0x10d/0x4d0 [ 31.348179] rcu_core+0x8c8/0x2860 [ 31.348712] __do_softirq+0x1b7/0x7d4 [ 31.349280] [ 31.349539] Last potentially related work creation: [ 31.350238] kasan_save_stack+0x22/0x50 [ 31.350843] __kasan_record_aux_stack+0x8e/0xa0 [ 31.351516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.352297] remove_vma+0x139/0x170 [ 31.352830] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.353494] do_vmi_munmap+0x1f1/0x2b0 [ 31.354077] __vm_munmap+0x138/0x3a0 [ 31.354634] __x64_sys_munmap+0x59/0x80 [ 31.355233] do_syscall_64+0x3f/0x90 [ 31.355826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.356586] [ 31.356847] The buggy address belongs to the object at ffff888009c5ee80 [ 31.356847] which belongs to the cache vm_area_struct of size 168 [ 31.358590] The buggy address is located 88 bytes inside of [ 31.358590] freed 168-byte region [ffff888009c5ee80, ffff888009c5ef28) [ 31.360274] [ 31.360531] The buggy address belongs to the physical page: [ 31.361314] page:00000000d118db18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9c5e [ 31.362605] memcg:ffff888015d39401 [ 31.363107] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.363893] page_type: 0xffffffff() [ 31.364426] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.365513] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d39401 [ 31.366604] page dumped because: kasan: bad access detected [ 31.367396] [ 31.367650] Memory state around the buggy address: [ 31.368345] ffff888009c5ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.369362] ffff888009c5ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.370382] >ffff888009c5ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.371400] ^ [ 31.372273] ffff888009c5ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.373291] ffff888009c5ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.374310] ================================================================== [ 31.375506] Disabling lock debugging due to kernel taint [ 33.472988] BUG: Bad rss-counter state mm:00000000884d4edf type:MM_FILEPAGES val:33 [ 33.474428] BUG: Bad rss-counter state mm:00000000884d4edf type:MM_ANONPAGES val:22 [ 33.939377] BUG: Bad rss-counter state mm:000000006de0eefc type:MM_FILEPAGES val:33 [ 33.940372] BUG: Bad rss-counter state mm:000000006de0eefc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65397' (ECDSA) to the list of known hosts. 2023/06/20 15:44:56 fuzzer started 2023/06/20 15:44:56 dialing manager at localhost:36067 2023/06/20 15:44:56 checking machine... 2023/06/20 15:44:56 checking revisions... [ 34.622790] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:44:56 testing simple program... [ 34.669565] cgroup: Unknown subsys name 'net' [ 34.716186] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:44:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8118ddc3 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09fb8 RDI=ffffffff8118ddc3 RBP=ffffffff8118ddc3 RSP=ffff88806ce09a48 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=0000000000000001 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800cbe1540 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 0000000000000000 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=00007f0e8cb50000 CR3=000000000d8b6000 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=f04310e4f220f79b864a48868147ad6e XMM02=ec2efd57dc4c00df000000000011d780 XMM03=327afe2e916a612a000000000011d850 XMM04=09fb2df074f2dc5900000000000ae988 XMM05=641cb0190b8d33080000000000132df8 XMM06=e4cb8bb95a7664b60000000000131c90 XMM07=fb795ef6d65770560000000000121eb8 XMM08=2c67c8bc2e329bc3000000000011d7f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1355 RSI=ffff888009c4fe28 RDI=ffff88806cf09aa8 RBP=ffff888009c4fe28 RSP=ffff88806cf099f0 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000229a3 R12=0000000000000008 R13=ffff888009c48000 R14=ffff888009c4fe28 R15=ffff88806cf09a98 RIP=ffffffff81130468 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 00007f1b2c468900 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=00007f1b2ca1f618 CR3=0000000010142000 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=563412feff00545000000000000080fe 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