syzkaller login: [ 31.210761] BUG: Bad rss-counter state mm:00000000294272c7 type:MM_FILEPAGES val:33 [ 31.212019] BUG: Bad rss-counter state mm:00000000294272c7 type:MM_ANONPAGES val:22 [ 31.252794] ================================================================== [ 31.253745] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.254666] Read of size 8 at addr ffff888019e42b38 by task sshd/222 [ 31.255434] [ 31.255652] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.256520] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.257484] Call Trace: [ 31.257799] [ 31.258087] dump_stack_lvl+0x91/0xf0 [ 31.258576] print_report+0xcc/0x620 [ 31.259062] ? __virt_addr_valid+0x102/0x340 [ 31.259624] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260244] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260855] kasan_report+0xbe/0xf0 [ 31.261325] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261951] vma_interval_tree_remove+0xc75/0xec0 [ 31.262562] vma_prepare+0xc54/0x11a0 [ 31.263053] __split_vma+0x5af/0x950 [ 31.263539] ? __pfx___split_vma+0x10/0x10 [ 31.264108] ? find_held_lock+0x2c/0x110 [ 31.264650] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.265228] ? lock_is_held_type+0x9f/0x120 [ 31.265782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.266400] ? mtree_range_walk+0x632/0x900 [ 31.266969] ? mas_walk+0x5c7/0x7c0 [ 31.267461] do_vmi_munmap+0x1f1/0x2b0 [ 31.267975] mmap_region+0x1f9/0x2660 [ 31.268474] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.269001] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.269741] ? __pfx_lock_acquire+0x10/0x10 [ 31.270287] ? __pfx_mmap_region+0x10/0x10 [ 31.270835] ? security_mmap_addr+0x7d/0xa0 [ 31.271383] ? get_unmapped_area+0x1f5/0x3f0 [ 31.271967] do_mmap+0x854/0xf00 [ 31.272423] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.272926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.273503] ksys_mmap_pgoff+0x3af/0x500 [ 31.274027] do_syscall_64+0x3f/0x90 [ 31.274516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.275179] RIP: 0033:0x7f221a9fad82 [ 31.275649] 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 [ 31.277845] RSP: 002b:00007fff7ea6a488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.278774] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f221a9fad82 [ 31.279635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2219e34000 [ 31.280509] RBP: 00007f2219e34000 R08: 0000000000000009 R09: 0000000000001000 [ 31.281380] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f8b741ec0 [ 31.282253] R13: 00007fff7ea6a4a0 R14: 00007fff7ea6a4d0 R15: 00007fff7ea6a830 [ 31.283135] [ 31.283435] [ 31.283654] Allocated by task 215: [ 31.284115] kasan_save_stack+0x22/0x50 [ 31.284635] kasan_set_track+0x25/0x30 [ 31.285134] __kasan_slab_alloc+0x59/0x70 [ 31.285675] kmem_cache_alloc+0x16b/0x370 [ 31.286213] vm_area_dup+0x20/0x160 [ 31.286688] __split_vma+0x170/0x950 [ 31.287154] split_vma+0xc6/0x110 [ 31.287588] mprotect_fixup+0x8d2/0xb30 [ 31.288098] do_mprotect_pkey+0x87e/0xd40 [ 31.288609] __x64_sys_mprotect+0x78/0xc0 [ 31.289123] do_syscall_64+0x3f/0x90 [ 31.289587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290226] [ 31.290437] Freed by task 19: [ 31.290817] kasan_save_stack+0x22/0x50 [ 31.291314] kasan_set_track+0x25/0x30 [ 31.291800] kasan_save_free_info+0x2b/0x50 [ 31.292346] __kasan_slab_free+0x10a/0x190 [ 31.292879] kmem_cache_free+0x10d/0x4d0 [ 31.293380] rcu_core+0x8c8/0x2860 [ 31.293823] __do_softirq+0x1b7/0x7d4 [ 31.294298] [ 31.294516] Last potentially related work creation: [ 31.295093] kasan_save_stack+0x22/0x50 [ 31.295616] __kasan_record_aux_stack+0x8e/0xa0 [ 31.296222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.296900] remove_vma+0x139/0x170 [ 31.297376] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.297971] do_vmi_munmap+0x1f1/0x2b0 [ 31.298478] __vm_munmap+0x138/0x3a0 [ 31.298970] __x64_sys_munmap+0x59/0x80 [ 31.299492] do_syscall_64+0x3f/0x90 [ 31.300000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.300662] [ 31.300883] The buggy address belongs to the object at ffff888019e42ae0 [ 31.300883] which belongs to the cache vm_area_struct of size 168 [ 31.302412] The buggy address is located 88 bytes inside of [ 31.302412] freed 168-byte region [ffff888019e42ae0, ffff888019e42b88) [ 31.303902] [ 31.304139] The buggy address belongs to the physical page: [ 31.304840] page:00000000bbd3108a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e42 [ 31.306000] memcg:ffff88800e6bf001 [ 31.306439] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.307130] page_type: 0xffffffff() [ 31.307606] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.308580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6bf001 [ 31.309548] page dumped because: kasan: bad access detected [ 31.310247] [ 31.310473] Memory state around the buggy address: [ 31.311096] ffff888019e42a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.312021] ffff888019e42a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.312917] >ffff888019e42b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.313812] ^ [ 31.314457] ffff888019e42b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.315359] ffff888019e42c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.316286] ================================================================== [ 31.317279] Disabling lock debugging due to kernel taint [ 33.098606] BUG: Bad rss-counter state mm:00000000a4f58926 type:MM_FILEPAGES val:33 [ 33.099577] BUG: Bad rss-counter state mm:00000000a4f58926 type:MM_ANONPAGES val:22 [ 33.557808] BUG: Bad rss-counter state mm:0000000011198767 type:MM_FILEPAGES val:33 [ 33.558974] BUG: Bad rss-counter state mm:0000000011198767 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17660' (ECDSA) to the list of known hosts. 2023/06/20 17:30:17 fuzzer started 2023/06/20 17:30:17 dialing manager at localhost:36067 2023/06/20 17:30:17 checking machine... 2023/06/20 17:30:17 checking revisions... [ 34.161373] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:30:17 testing simple program... [ 34.206259] cgroup: Unknown subsys name 'net' [ 34.314768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:30:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007f170428819d RCX=0000000080000000 RDX=1ffff11002871ebb RSI=ffffffff81007b50 RDI=00007f170428819d RBP=00007f170428819d RSP=ffff88801438f500 R8 =ffffffff864bbb58 R9 =ffff88801438f5c0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801438f648 R13=0000000000000000 R14=ffff8880141a1b40 R15=ffff88800c5cf080 RIP=ffffffff814c0871 RFL=00000203 [------C] 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 00007f17039be900 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=00007f1702e21538 CR3=000000000c7b8000 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=db782f68e852f5aae2448db1f29563d0 XMM02=000000000011a6a8d59e07bde36eea69 XMM03=000000000011a7d0ec2efd57dc4c00df XMM04=5782ec245993067c00000000000ae988 XMM05=d2f1f025fef44c700000000000133050 XMM06=59d5b690e0af863b0000000000131ee8 XMM07=fb795ef6d65770560000000000122078 XMM08=2c67c8bc2e329bc3000000000011a7d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff88800ed47a60 RDX=1ffff11001da8f43 RSI=ffffffff813ad720 RDI=ffff88800ed47a88 RBP=ffff88800ed47a58 RSP=ffff88800ed479b8 R8 =0000000000000001 R9 =ffff88800ed47a00 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800ed47a88 R13=0000000000000000 R14=ffff88801633b680 R15=ffff888019ba4000 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007fe24606d900 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=00007fe246624618 CR3=000000000fb80000 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