syzkaller login: [ 31.171673] BUG: Bad rss-counter state mm:000000004d47a840 type:MM_FILEPAGES val:33 [ 31.172693] BUG: Bad rss-counter state mm:000000004d47a840 type:MM_ANONPAGES val:22 [ 31.347004] ================================================================== [ 31.347910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.348851] Read of size 8 at addr ffff88800e141880 by task sshd/219 [ 31.349612] [ 31.349877] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.350793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.351769] Call Trace: [ 31.352095] [ 31.352374] dump_stack_lvl+0x91/0xf0 [ 31.352872] print_report+0xcc/0x620 [ 31.353368] ? __virt_addr_valid+0x102/0x340 [ 31.353922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.354561] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.355173] kasan_report+0xbe/0xf0 [ 31.355642] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356271] vma_interval_tree_remove+0xc75/0xec0 [ 31.356868] vma_prepare+0xc54/0x11a0 [ 31.357354] __split_vma+0x5af/0x950 [ 31.357832] ? __pfx___split_vma+0x10/0x10 [ 31.358371] ? find_held_lock+0x2c/0x110 [ 31.358888] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.359445] ? lock_is_held_type+0x9f/0x120 [ 31.359986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.360601] ? mtree_range_walk+0x632/0x900 [ 31.361147] ? mas_walk+0x5c7/0x7c0 [ 31.361616] do_vmi_munmap+0x1f1/0x2b0 [ 31.362109] mmap_region+0x1f9/0x2660 [ 31.362588] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.363096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.363814] ? __pfx_lock_acquire+0x10/0x10 [ 31.364347] ? __pfx_mmap_region+0x10/0x10 [ 31.364881] ? security_mmap_addr+0x7d/0xa0 [ 31.365412] ? get_unmapped_area+0x1f5/0x3f0 [ 31.365963] do_mmap+0x854/0xf00 [ 31.366423] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.366919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.367477] ksys_mmap_pgoff+0x3af/0x500 [ 31.367986] do_syscall_64+0x3f/0x90 [ 31.368462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.369112] RIP: 0033:0x7ff37f4e5d82 [ 31.369568] 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 [ 31.371697] RSP: 002b:00007ffc92f9f308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.372597] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff37f4e5d82 [ 31.373440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff37e91f000 [ 31.374299] RBP: 00007ff37e91f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.375143] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1f8047ec0 [ 31.375980] R13: 00007ffc92f9f320 R14: 00007ffc92f9f350 R15: 00007ffc92f9f6b0 [ 31.376837] [ 31.377129] [ 31.377343] Allocated by task 212: [ 31.377773] kasan_save_stack+0x22/0x50 [ 31.378279] kasan_set_track+0x25/0x30 [ 31.378770] __kasan_slab_alloc+0x59/0x70 [ 31.379296] kmem_cache_alloc+0x16b/0x370 [ 31.379817] vm_area_dup+0x20/0x160 [ 31.380268] __split_vma+0x170/0x950 [ 31.380732] split_vma+0xc6/0x110 [ 31.381183] mprotect_fixup+0x8d2/0xb30 [ 31.381688] do_mprotect_pkey+0x87e/0xd40 [ 31.382230] __x64_sys_mprotect+0x78/0xc0 [ 31.382746] do_syscall_64+0x3f/0x90 [ 31.383221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.383859] [ 31.384075] Freed by task 212: [ 31.384471] kasan_save_stack+0x22/0x50 [ 31.384967] kasan_set_track+0x25/0x30 [ 31.385459] kasan_save_free_info+0x2b/0x50 [ 31.385992] __kasan_slab_free+0x10a/0x190 [ 31.386525] kmem_cache_free+0x10d/0x4d0 [ 31.387036] rcu_core+0x8c8/0x2860 [ 31.387475] __do_softirq+0x1b7/0x7d4 [ 31.387959] [ 31.388175] Last potentially related work creation: [ 31.388763] kasan_save_stack+0x22/0x50 [ 31.389262] __kasan_record_aux_stack+0x8e/0xa0 [ 31.389834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.390508] remove_vma+0x139/0x170 [ 31.391034] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.391620] do_vmi_munmap+0x1f1/0x2b0 [ 31.392118] __vm_munmap+0x138/0x3a0 [ 31.392600] __x64_sys_munmap+0x59/0x80 [ 31.393110] do_syscall_64+0x3f/0x90 [ 31.393597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.394274] [ 31.394496] The buggy address belongs to the object at ffff88800e141828 [ 31.394496] which belongs to the cache vm_area_struct of size 168 [ 31.396023] The buggy address is located 88 bytes inside of [ 31.396023] freed 168-byte region [ffff88800e141828, ffff88800e1418d0) [ 31.397466] [ 31.397688] The buggy address belongs to the physical page: [ 31.398379] page:00000000b5b7ace6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe141 [ 31.399489] memcg:ffff88800d978801 [ 31.399935] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.400594] page_type: 0xffffffff() [ 31.401055] raw: 0100000000000200 ffff8880087a0c80 ffffea000037fe80 dead000000000006 [ 31.402004] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d978801 [ 31.402952] page dumped because: kasan: bad access detected [ 31.403636] [ 31.403856] Memory state around the buggy address: [ 31.404459] ffff88800e141780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.405341] ffff88800e141800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.406232] >ffff88800e141880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.407115] ^ [ 31.407537] ffff88800e141900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.408421] ffff88800e141980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.409295] ================================================================== [ 31.410240] Disabling lock debugging due to kernel taint [ 33.473672] BUG: Bad rss-counter state mm:00000000ce97ac7a type:MM_FILEPAGES val:33 [ 33.474609] BUG: Bad rss-counter state mm:00000000ce97ac7a type:MM_ANONPAGES val:22 [ 33.959673] BUG: Bad rss-counter state mm:0000000009f2340a type:MM_FILEPAGES val:33 [ 33.960586] BUG: Bad rss-counter state mm:0000000009f2340a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27955' (ECDSA) to the list of known hosts. 2023/06/20 23:46:35 fuzzer started 2023/06/20 23:46:35 dialing manager at localhost:36067 2023/06/20 23:46:35 checking machine... 2023/06/20 23:46:35 checking revisions... [ 34.676865] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:46:35 testing simple program... [ 34.726436] cgroup: Unknown subsys name 'net' [ 34.791963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:46:35 Registers: info registers vcpu 0 RAX=ffffea0000660600 RBX=ffff888019818000 RCX=ffff8880087b83c0 RDX=ffff888099818000 RSI=ffff888015b821a0 RDI=ffff8880084413c0 RBP=0000000000000000 RSP=ffff888014747628 R8 =ffff888019818000 R9 =0000000000000000 R10=ffffea000056e080 R11=000000000080001d R12=dffffc0000000000 R13=ffff888014747668 R14=0000000000000000 R15=ffff888015b821a0 RIP=ffffffff81810393 RFL=00000286 [--S--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 00007f42e10ad900 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=00007f42e04bcef0 CR3=000000000cb7c000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=cae60baa172e98b900000000000ae988 XMM05=0f22622eb34547d50000000000132fe8 XMM06=806171799158d9670000000000131dd8 XMM07=fb795ef6d65770560000000000122090 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801945f990 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff818c8314 RDI=ffff88801945f99c RBP=0000000000000006 RSP=ffff88801945f8a8 R8 =0000000000000001 R9 =ffff88801945f908 R10=0000000000038001 R11=00000000000246c8 R12=ffff88801945f990 R13=0000000000000000 R14=ffff88800dce3680 R15=ffff888015dd5218 RIP=ffffffff813ad506 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 00007fae53ba4900 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=00007ffc3455c000 CR3=000000000eefa000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000