Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.686417] BUG: Bad rss-counter state mm:0000000000ddbcfe type:MM_FILEPAGES val:33 [ 36.687396] BUG: Bad rss-counter state mm:0000000000ddbcfe type:MM_ANONPAGES val:22 [ 36.844961] ================================================================== [ 36.846062] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.847473] Read of size 8 at addr ffff88800e835b38 by task sshd/218 [ 36.848565] [ 36.848862] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.849983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.851208] Call Trace: [ 36.851587] [ 36.851953] dump_stack_lvl+0x91/0xf0 [ 36.852527] print_report+0xcc/0x620 [ 36.853114] ? __virt_addr_valid+0x102/0x340 [ 36.853787] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.854568] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.855355] kasan_report+0xbe/0xf0 [ 36.855983] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.856788] vma_interval_tree_remove+0xc75/0xec0 [ 36.857548] vma_prepare+0xc54/0x11a0 [ 36.858171] __split_vma+0x5af/0x950 [ 36.858812] ? __pfx___split_vma+0x10/0x10 [ 36.859483] ? find_held_lock+0x2c/0x110 [ 36.860170] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.860903] ? lock_is_held_type+0x9f/0x120 [ 36.861586] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.862375] ? mtree_range_walk+0x632/0x900 [ 36.863079] ? mas_walk+0x5c7/0x7c0 [ 36.863567] do_vmi_munmap+0x1f1/0x2b0 [ 36.864099] mmap_region+0x1f9/0x2660 [ 36.864600] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.865151] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.865918] ? __pfx_lock_acquire+0x10/0x10 [ 36.866474] ? __pfx_mmap_region+0x10/0x10 [ 36.867056] ? security_mmap_addr+0x7d/0xa0 [ 36.867610] ? get_unmapped_area+0x1f5/0x3f0 [ 36.868210] do_mmap+0x854/0xf00 [ 36.868689] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.869206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.869807] ksys_mmap_pgoff+0x3af/0x500 [ 36.870334] do_syscall_64+0x3f/0x90 [ 36.870878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.871557] RIP: 0033:0x7f05d4361d82 [ 36.872058] 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 [ 36.874318] RSP: 002b:00007ffcaa88bfc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.875293] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05d4361d82 [ 36.876216] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05d379b000 [ 36.877121] RBP: 00007f05d379b000 R08: 0000000000000009 R09: 0000000000001000 [ 36.878024] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b209496ec0 [ 36.878954] R13: 00007ffcaa88bfe0 R14: 00007ffcaa88c010 R15: 00007ffcaa88c370 [ 36.879888] [ 36.880197] [ 36.880422] Allocated by task 211: [ 36.880887] kasan_save_stack+0x22/0x50 [ 36.881419] kasan_set_track+0x25/0x30 [ 36.881948] __kasan_slab_alloc+0x59/0x70 [ 36.882512] kmem_cache_alloc+0x16b/0x370 [ 36.883072] vm_area_dup+0x20/0x160 [ 36.883548] __split_vma+0x170/0x950 [ 36.884063] split_vma+0xc6/0x110 [ 36.884532] mprotect_fixup+0x8d2/0xb30 [ 36.885069] do_mprotect_pkey+0x87e/0xd40 [ 36.885613] __x64_sys_mprotect+0x78/0xc0 [ 36.886168] do_syscall_64+0x3f/0x90 [ 36.886700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.887376] [ 36.887607] Freed by task 211: [ 36.888189] kasan_save_stack+0x22/0x50 [ 36.888741] kasan_set_track+0x25/0x30 [ 36.889257] kasan_save_free_info+0x2b/0x50 [ 36.889826] __kasan_slab_free+0x10a/0x190 [ 36.890391] kmem_cache_free+0x10d/0x4d0 [ 36.890960] rcu_core+0x8c8/0x2860 [ 36.891426] __do_softirq+0x1b7/0x7d4 [ 36.891954] [ 36.892176] Last potentially related work creation: [ 36.892806] kasan_save_stack+0x22/0x50 [ 36.893333] __kasan_record_aux_stack+0x8e/0xa0 [ 36.893949] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.894639] remove_vma+0x139/0x170 [ 36.895117] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.895718] do_vmi_munmap+0x1f1/0x2b0 [ 36.896229] __vm_munmap+0x138/0x3a0 [ 36.896729] __x64_sys_munmap+0x59/0x80 [ 36.897257] do_syscall_64+0x3f/0x90 [ 36.897760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.898438] [ 36.898703] Second to last potentially related work creation: [ 36.899412] kasan_save_stack+0x22/0x50 [ 36.899957] __kasan_record_aux_stack+0x8e/0xa0 [ 36.900558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.901260] remove_vma+0x139/0x170 [ 36.901749] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.902328] do_vmi_munmap+0x1f1/0x2b0 [ 36.902865] mmap_region+0x1f9/0x2660 [ 36.903365] do_mmap+0x854/0xf00 [ 36.903835] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.904347] ksys_mmap_pgoff+0x3af/0x500 [ 36.904986] do_syscall_64+0x3f/0x90 [ 36.905690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.906388] [ 36.906652] The buggy address belongs to the object at ffff88800e835ae0 [ 36.906652] which belongs to the cache vm_area_struct of size 168 [ 36.908222] The buggy address is located 88 bytes inside of [ 36.908222] freed 168-byte region [ffff88800e835ae0, ffff88800e835b88) [ 36.909709] [ 36.909935] The buggy address belongs to the physical page: [ 36.910654] page:000000003257b0c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe835 [ 36.911820] memcg:ffff88800e917701 [ 36.912269] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.912957] page_type: 0xffffffff() [ 36.913440] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.914420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e917701 [ 36.915401] page dumped because: kasan: bad access detected [ 36.916120] [ 36.916352] Memory state around the buggy address: [ 36.916976] ffff88800e835a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.917895] ffff88800e835a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 36.918839] >ffff88800e835b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.919747] ^ [ 36.920387] ffff88800e835b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 36.921298] ffff88800e835c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.922196] ================================================================== [ 36.923186] Disabling lock debugging due to kernel taint [ 38.911222] BUG: Bad rss-counter state mm:000000006d7983e4 type:MM_FILEPAGES val:33 [ 38.912178] BUG: Bad rss-counter state mm:000000006d7983e4 type:MM_ANONPAGES val:22 [ 39.397776] BUG: Bad rss-counter state mm:00000000ea8fab72 type:MM_FILEPAGES val:33 [ 39.398801] BUG: Bad rss-counter state mm:00000000ea8fab72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40379' (ECDSA) to the list of known hosts. 2023/06/20 05:00:20 fuzzer started 2023/06/20 05:00:20 dialing manager at localhost:44161 2023/06/20 05:00:20 checking machine... 2023/06/20 05:00:20 checking revisions... [ 40.155644] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:00:20 testing simple program... [ 40.201081] cgroup: Unknown subsys name 'net' [ 40.237053] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:00:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880088ded80 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888018dff6e0 RBP=1ffff110031bfed8 RSP=ffff888018dff6b8 R8 =0000000000000001 R9 =ffffed10031bfedc R10=0000000000000003 R11=00000000000b6996 R12=ffff8880088ded88 R13=ffff8880088ded90 R14=0000000000000001 R15=ffff8880163aa274 RIP=ffffffff812e00f6 RFL=00000046 [---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 00007fbf706c2700 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=00007f28bb9460b0 CR3=0000000018df0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30333738342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303337 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f079614c210 CR3=000000000c588000 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=6ae8b714e287c99db243b2afc9bf6a70 XMM02=000000000011e7d8ec2efd57dc4c00df XMM03=00000000001249e036ddcf044123b4ef XMM04=c524f78aa0ffbf7100000000000ae988 XMM05=dfcdbad4f1609c370000000000135600 XMM06=759fc43039fec55300000000001347d8 XMM07=e042d86d42eb936e0000000000124c60 XMM08=36ddcf044123b4ef000000000011e838 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000