syzkaller login: [ 36.553583] BUG: Bad rss-counter state mm:000000005be775c1 type:MM_FILEPAGES val:33 [ 36.555158] BUG: Bad rss-counter state mm:000000005be775c1 type:MM_ANONPAGES val:22 [ 36.730777] ================================================================== [ 36.731748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.732771] Read of size 8 at addr ffff88800e0433f8 by task sshd/218 [ 36.733677] [ 36.733913] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.734846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.735892] Call Trace: [ 36.736239] <TASK> [ 36.736558] dump_stack_lvl+0x91/0xf0 [ 36.737121] print_report+0xcc/0x620 [ 36.737660] ? __virt_addr_valid+0x102/0x340 [ 36.738307] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.738983] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.739651] kasan_report+0xbe/0xf0 [ 36.740167] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.740862] vma_interval_tree_remove+0xc75/0xec0 [ 36.741532] vma_prepare+0xc54/0x11a0 [ 36.742052] __split_vma+0x5af/0x950 [ 36.742573] ? __pfx___split_vma+0x10/0x10 [ 36.743161] ? find_held_lock+0x2c/0x110 [ 36.743731] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.744393] ? lock_is_held_type+0x9f/0x120 [ 36.744990] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.745684] ? mtree_range_walk+0x632/0x900 [ 36.746297] ? mas_walk+0x5c7/0x7c0 [ 36.746813] do_vmi_munmap+0x1f1/0x2b0 [ 36.747353] mmap_region+0x1f9/0x2660 [ 36.747871] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.748440] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.749359] ? __pfx_lock_acquire+0x10/0x10 [ 36.749965] ? __pfx_mmap_region+0x10/0x10 [ 36.750553] ? security_mmap_addr+0x7d/0xa0 [ 36.751151] ? get_unmapped_area+0x1f5/0x3f0 [ 36.751754] do_mmap+0x854/0xf00 [ 36.752236] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.752784] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.753403] ksys_mmap_pgoff+0x3af/0x500 [ 36.753969] do_syscall_64+0x3f/0x90 [ 36.754500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.755215] RIP: 0033:0x7ff16fb4fd82 [ 36.755720] 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 [ 36.758085] RSP: 002b:00007ffef97f16c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.759082] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff16fb4fd82 [ 36.760003] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff16ef89000 [ 36.760946] RBP: 00007ff16ef89000 R08: 0000000000000009 R09: 0000000000001000 [ 36.761895] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e0fc1ad90 [ 36.762834] R13: 00007ffef97f16e0 R14: 00007ffef97f1710 R15: 00007ffef97f1a70 [ 36.763791] </TASK> [ 36.764109] [ 36.764341] Allocated by task 211: [ 36.764814] kasan_save_stack+0x22/0x50 [ 36.765378] kasan_set_track+0x25/0x30 [ 36.765907] __kasan_slab_alloc+0x59/0x70 [ 36.766466] kmem_cache_alloc+0x16b/0x370 [ 36.767014] vm_area_dup+0x20/0x160 [ 36.767496] __split_vma+0x170/0x950 [ 36.767996] split_vma+0xc6/0x110 [ 36.768472] mprotect_fixup+0x8d2/0xb30 [ 36.769010] do_mprotect_pkey+0x87e/0xd40 [ 36.769584] __x64_sys_mprotect+0x78/0xc0 [ 36.770138] do_syscall_64+0x3f/0x90 [ 36.770654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.771366] [ 36.771601] Freed by task 211: [ 36.772035] kasan_save_stack+0x22/0x50 [ 36.772595] kasan_set_track+0x25/0x30 [ 36.773158] kasan_save_free_info+0x2b/0x50 [ 36.773739] __kasan_slab_free+0x10a/0x190 [ 36.774329] kmem_cache_free+0x10d/0x4d0 [ 36.774880] rcu_core+0x8c8/0x2860 [ 36.775368] __do_softirq+0x1b7/0x7d4 [ 36.775905] [ 36.776145] Last potentially related work creation: [ 36.776782] kasan_save_stack+0x22/0x50 [ 36.777326] __kasan_record_aux_stack+0x8e/0xa0 [ 36.777942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.778623] remove_vma+0x139/0x170 [ 36.779105] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.779695] do_vmi_munmap+0x1f1/0x2b0 [ 36.780207] __vm_munmap+0x138/0x3a0 [ 36.780701] __x64_sys_munmap+0x59/0x80 [ 36.781246] do_syscall_64+0x3f/0x90 [ 36.781748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.782430] [ 36.782657] Second to last potentially related work creation: [ 36.783390] kasan_save_stack+0x22/0x50 [ 36.783924] __kasan_record_aux_stack+0x8e/0xa0 [ 36.784560] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.785284] remove_vma+0x139/0x170 [ 36.785776] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.786396] do_vmi_munmap+0x1f1/0x2b0 [ 36.786921] mmap_region+0x1f9/0x2660 [ 36.787435] do_mmap+0x854/0xf00 [ 36.787902] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.788429] ksys_mmap_pgoff+0x3af/0x500 [ 36.788970] do_syscall_64+0x3f/0x90 [ 36.789485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.790176] [ 36.790405] The buggy address belongs to the object at ffff88800e0433a0 [ 36.790405] which belongs to the cache vm_area_struct of size 168 [ 36.791974] The buggy address is located 88 bytes inside of [ 36.791974] freed 168-byte region [ffff88800e0433a0, ffff88800e043448) [ 36.793574] [ 36.793809] The buggy address belongs to the physical page: [ 36.794514] page:00000000af3ee226 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe043 [ 36.795691] memcg:ffff88800988ed01 [ 36.796166] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.796926] page_type: 0xffffffff() [ 36.797422] raw: 0100000000000200 ffff88800879fc80 ffffea000032cc80 dead000000000005 [ 36.798423] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800988ed01 [ 36.799399] page dumped because: kasan: bad access detected [ 36.800118] [ 36.800344] Memory state around the buggy address: [ 36.800971] ffff88800e043280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.801908] ffff88800e043300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.802819] >ffff88800e043380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.803738] ^ [ 36.804700] ffff88800e043400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.805649] ffff88800e043480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.806565] ================================================================== [ 36.807701] Disabling lock debugging due to kernel taint [ 39.052799] BUG: Bad rss-counter state mm:0000000025140d75 type:MM_FILEPAGES val:33 [ 39.054196] BUG: Bad rss-counter state mm:0000000025140d75 type:MM_ANONPAGES val:22 [ 39.459128] BUG: Bad rss-counter state mm:00000000672fe42e type:MM_FILEPAGES val:33 [ 39.459903] BUG: Bad rss-counter state mm:00000000672fe42e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35199' (ECDSA) to the list of known hosts. 2023/06/19 21:10:51 fuzzer started 2023/06/19 21:10:51 dialing manager at localhost:44161 2023/06/19 21:10:51 checking machine... 2023/06/19 21:10:51 checking revisions... [ 40.152319] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:10:51 testing simple program... [ 40.231341] cgroup: Unknown subsys name 'net' [ 40.298051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:10:44 Registers: info registers vcpu 0 RAX=ffffffff86124afb RBX=0000000000000001 RCX=ffffffff86124afa RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86124afe R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000001dbdd R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888014747bc8 R15=ffff88806ce09a98 RIP=ffffffff81130b99 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb0a128e900 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=00007fb0a069b630 CR3=000000000db18000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8b131789c7c1176400000000000ae988 XMM05=e3792f5cb9a560660000000000135960 XMM06=bdf2e299e47b49d500000000001343e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e57978 RSI=ffff888008e57c88 RDI=ffff888008e57980 RBP=ffff888008e57d18 RSP=ffff888008e578c0 R8 =0000000000000001 R9 =ffff888008e57970 R10=0000000000038001 R11=0000000000020ed0 R12=ffff888008e57990 R13=ffff888008e57978 R14=ffff888008e57c88 R15=ffff888008e57930 RIP=ffffffff81131c58 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 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=00007fa241aa4618 CR3=000000000b9a4000 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