syzkaller login: [ 39.132456] BUG: Bad rss-counter state mm:000000004d632161 type:MM_FILEPAGES val:33 [ 39.133789] BUG: Bad rss-counter state mm:000000004d632161 type:MM_ANONPAGES val:22 [ 39.297323] ================================================================== [ 39.298442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.299671] Read of size 8 at addr ffff888016cb2058 by task sshd/219 [ 39.300699] [ 39.300976] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.302099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.303225] Call Trace: [ 39.303549] [ 39.303857] dump_stack_lvl+0x91/0xf0 [ 39.304361] print_report+0xcc/0x620 [ 39.304854] ? __virt_addr_valid+0x102/0x340 [ 39.305414] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.306051] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.306669] kasan_report+0xbe/0xf0 [ 39.307149] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.307774] vma_interval_tree_remove+0xc75/0xec0 [ 39.308405] vma_prepare+0xc54/0x11a0 [ 39.308902] __split_vma+0x5af/0x950 [ 39.309378] ? __pfx___split_vma+0x10/0x10 [ 39.309937] ? find_held_lock+0x2c/0x110 [ 39.310459] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.311071] ? lock_is_held_type+0x9f/0x120 [ 39.311638] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.312271] ? mtree_range_walk+0x632/0x900 [ 39.312843] ? mas_walk+0x5c7/0x7c0 [ 39.313338] do_vmi_munmap+0x1f1/0x2b0 [ 39.313869] mmap_region+0x1f9/0x2660 [ 39.314368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.314891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.315632] ? __pfx_lock_acquire+0x10/0x10 [ 39.316166] ? __pfx_mmap_region+0x10/0x10 [ 39.316706] ? security_mmap_addr+0x7d/0xa0 [ 39.317241] ? get_unmapped_area+0x1f5/0x3f0 [ 39.317807] do_mmap+0x854/0xf00 [ 39.318259] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.318762] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.319332] ksys_mmap_pgoff+0x3af/0x500 [ 39.319858] do_syscall_64+0x3f/0x90 [ 39.320333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.320998] RIP: 0033:0x7f026af93d82 [ 39.321463] 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 [ 39.323629] RSP: 002b:00007ffde6dd0ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.324539] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f026af93d82 [ 39.325405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f026a3cd000 [ 39.326271] RBP: 00007f026a3cd000 R08: 0000000000000009 R09: 0000000000001000 [ 39.327124] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560baed18d90 [ 39.327974] R13: 00007ffde6dd0d00 R14: 00007ffde6dd0d30 R15: 00007ffde6dd1090 [ 39.328842] [ 39.329137] [ 39.329351] Allocated by task 212: [ 39.329783] kasan_save_stack+0x22/0x50 [ 39.330316] kasan_set_track+0x25/0x30 [ 39.330811] __kasan_slab_alloc+0x59/0x70 [ 39.331344] kmem_cache_alloc+0x16b/0x370 [ 39.331866] vm_area_dup+0x20/0x160 [ 39.332328] __split_vma+0x170/0x950 [ 39.332798] split_vma+0xc6/0x110 [ 39.333246] mprotect_fixup+0x8d2/0xb30 [ 39.333756] do_mprotect_pkey+0x87e/0xd40 [ 39.334289] __x64_sys_mprotect+0x78/0xc0 [ 39.334809] do_syscall_64+0x3f/0x90 [ 39.335292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.335967] [ 39.336190] Freed by task 203: [ 39.336585] kasan_save_stack+0x22/0x50 [ 39.337110] kasan_set_track+0x25/0x30 [ 39.337613] kasan_save_free_info+0x2b/0x50 [ 39.338148] __kasan_slab_free+0x10a/0x190 [ 39.338696] kmem_cache_free+0x10d/0x4d0 [ 39.339205] rcu_core+0x8c8/0x2860 [ 39.339647] __do_softirq+0x1b7/0x7d4 [ 39.340132] [ 39.340355] Last potentially related work creation: [ 39.341059] kasan_save_stack+0x22/0x50 [ 39.341578] __kasan_record_aux_stack+0x8e/0xa0 [ 39.342191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.342847] remove_vma+0x139/0x170 [ 39.343308] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.343882] do_vmi_munmap+0x1f1/0x2b0 [ 39.344388] __vm_munmap+0x138/0x3a0 [ 39.344881] __x64_sys_munmap+0x59/0x80 [ 39.345401] do_syscall_64+0x3f/0x90 [ 39.345901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.346558] [ 39.346774] The buggy address belongs to the object at ffff888016cb2000 [ 39.346774] which belongs to the cache vm_area_struct of size 168 [ 39.348279] The buggy address is located 88 bytes inside of [ 39.348279] freed 168-byte region [ffff888016cb2000, ffff888016cb20a8) [ 39.349729] [ 39.349956] The buggy address belongs to the physical page: [ 39.350638] page:00000000eb0be2ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cb2 [ 39.351744] memcg:ffff88801418b101 [ 39.352179] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.352880] page_type: 0xffffffff() [ 39.353341] raw: 0100000000000200 ffff8880087a0c80 ffffea0000506280 dead000000000005 [ 39.354274] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801418b101 [ 39.355187] page dumped because: kasan: bad access detected [ 39.355854] [ 39.356076] Memory state around the buggy address: [ 39.356661] ffff888016cb1f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 39.357528] ffff888016cb1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.358486] >ffff888016cb2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.359352] ^ [ 39.360094] ffff888016cb2080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 39.360958] ffff888016cb2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.361834] ================================================================== [ 39.362815] Disabling lock debugging due to kernel taint [ 42.382915] BUG: Bad rss-counter state mm:00000000612b05b2 type:MM_FILEPAGES val:33 [ 42.384220] BUG: Bad rss-counter state mm:00000000612b05b2 type:MM_ANONPAGES val:22 [ 42.905478] BUG: Bad rss-counter state mm:00000000411d539b type:MM_FILEPAGES val:33 [ 42.906766] BUG: Bad rss-counter state mm:00000000411d539b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64203' (ECDSA) to the list of known hosts. 2023/06/21 03:35:07 fuzzer started 2023/06/21 03:35:07 dialing manager at localhost:36067 2023/06/21 03:35:07 checking machine... 2023/06/21 03:35:07 checking revisions... [ 43.699815] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:35:07 testing simple program... [ 43.751130] cgroup: Unknown subsys name 'net' [ 43.796549] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:35:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff11001b67f18 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800db3f8d0 RSP=ffff88800db3f808 R8 =ffffffff864bbb58 R9 =ffff88800db3f8b8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800db3f8d8 R13=ffff88800db3f8c0 R14=0000000000000005 R15=ffff88800db3f878 RIP=ffffffff81130b54 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 00007f3d42b4e900 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=00007f3d43105618 CR3=000000000e67c000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f312feeb000 CR3=000000000d80e000 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=c819b07a8bf4e0b4e44f4f150c868d00 XMM02=ec2efd57dc4c00df000000000011c238 XMM03=77c21e530e10f430000000000011c308 XMM04=b3cec0eddfdcbd3700000000000ae988 XMM05=dfcdbad4f1609c370000000000132ab8 XMM06=bf4bfd67f1618e620000000000131240 XMM07=e042d86d42eb936e0000000000122730 XMM08=77c21e530e10f430000000000011c308 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000