syzkaller login: [ 34.777267] BUG: Bad rss-counter state mm:00000000d148982c type:MM_FILEPAGES val:33 [ 34.778657] BUG: Bad rss-counter state mm:00000000d148982c type:MM_ANONPAGES val:22 [ 34.926853] ================================================================== [ 34.927765] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.928722] Read of size 8 at addr ffff8880180854e0 by task sshd/220 [ 34.929498] [ 34.929719] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.930668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.931646] Call Trace: [ 34.931984] [ 34.932272] dump_stack_lvl+0x91/0xf0 [ 34.932789] print_report+0xcc/0x620 [ 34.933271] ? __virt_addr_valid+0x102/0x340 [ 34.933828] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.934441] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.935071] kasan_report+0xbe/0xf0 [ 34.935559] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.936182] vma_interval_tree_remove+0xc75/0xec0 [ 34.936795] vma_prepare+0xc54/0x11a0 [ 34.937289] __split_vma+0x5af/0x950 [ 34.937766] ? __pfx___split_vma+0x10/0x10 [ 34.938304] ? find_held_lock+0x2c/0x110 [ 34.938832] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.939405] ? lock_is_held_type+0x9f/0x120 [ 34.939953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.940595] ? mtree_range_walk+0x632/0x900 [ 34.941148] ? mas_walk+0x5c7/0x7c0 [ 34.941636] do_vmi_munmap+0x1f1/0x2b0 [ 34.942143] mmap_region+0x1f9/0x2660 [ 34.942640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.943158] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.943868] ? __pfx_lock_acquire+0x10/0x10 [ 34.944411] ? __pfx_mmap_region+0x10/0x10 [ 34.944953] ? security_mmap_addr+0x7d/0xa0 [ 34.945491] ? get_unmapped_area+0x1f5/0x3f0 [ 34.946040] do_mmap+0x854/0xf00 [ 34.946480] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.946981] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.947550] ksys_mmap_pgoff+0x3af/0x500 [ 34.948062] do_syscall_64+0x3f/0x90 [ 34.948555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.949210] RIP: 0033:0x7f3602540d82 [ 34.949677] 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 [ 34.951811] RSP: 002b:00007ffe83b533f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.952749] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3602540d82 [ 34.953603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f360197a000 [ 34.954451] RBP: 00007f360197a000 R08: 0000000000000009 R09: 0000000000001000 [ 34.955300] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564843a31b20 [ 34.956152] R13: 00007ffe83b53410 R14: 00007ffe83b53440 R15: 00007ffe83b537a0 [ 34.957021] [ 34.957315] [ 34.957531] Allocated by task 213: [ 34.957959] kasan_save_stack+0x22/0x50 [ 34.958469] kasan_set_track+0x25/0x30 [ 34.958963] __kasan_slab_alloc+0x59/0x70 [ 34.959498] kmem_cache_alloc+0x16b/0x370 [ 34.960041] vm_area_dup+0x20/0x160 [ 34.960508] __split_vma+0x170/0x950 [ 34.961001] split_vma+0xc6/0x110 [ 34.961448] mprotect_fixup+0x8d2/0xb30 [ 34.961974] do_mprotect_pkey+0x87e/0xd40 [ 34.962496] __x64_sys_mprotect+0x78/0xc0 [ 34.963027] do_syscall_64+0x3f/0x90 [ 34.963510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.964179] [ 34.964420] Freed by task 213: [ 34.964828] kasan_save_stack+0x22/0x50 [ 34.965350] kasan_set_track+0x25/0x30 [ 34.965850] kasan_save_free_info+0x2b/0x50 [ 34.966403] __kasan_slab_free+0x10a/0x190 [ 34.966951] kmem_cache_free+0x10d/0x4d0 [ 34.967476] rcu_core+0x8c8/0x2860 [ 34.967928] __do_softirq+0x1b7/0x7d4 [ 34.968416] [ 34.968634] Last potentially related work creation: [ 34.969231] kasan_save_stack+0x22/0x50 [ 34.969755] __kasan_record_aux_stack+0x8e/0xa0 [ 34.970342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.971000] remove_vma+0x139/0x170 [ 34.971459] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.972018] do_vmi_munmap+0x1f1/0x2b0 [ 34.972506] __vm_munmap+0x138/0x3a0 [ 34.972972] __x64_sys_munmap+0x59/0x80 [ 34.973475] do_syscall_64+0x3f/0x90 [ 34.973950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.974595] [ 34.974814] The buggy address belongs to the object at ffff888018085488 [ 34.974814] which belongs to the cache vm_area_struct of size 168 [ 34.976319] The buggy address is located 88 bytes inside of [ 34.976319] freed 168-byte region [ffff888018085488, ffff888018085530) [ 34.977787] [ 34.978012] The buggy address belongs to the physical page: [ 34.978693] page:00000000227e78d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18085 [ 34.979815] memcg:ffff888018086001 [ 34.980245] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.980975] page_type: 0xffffffff() [ 34.981455] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 34.982403] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018086001 [ 34.983357] page dumped because: kasan: bad access detected [ 34.984052] [ 34.984278] Memory state around the buggy address: [ 34.984887] ffff888018085380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.985773] ffff888018085400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.986661] >ffff888018085480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.987521] ^ [ 34.988285] ffff888018085500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 34.989163] ffff888018085580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.990044] ================================================================== [ 34.991102] Disabling lock debugging due to kernel taint [ 36.628302] BUG: Bad rss-counter state mm:0000000058989ae5 type:MM_FILEPAGES val:33 [ 36.628923] BUG: Bad rss-counter state mm:0000000058989ae5 type:MM_ANONPAGES val:22 [ 37.097178] BUG: Bad rss-counter state mm:000000002fcdae76 type:MM_FILEPAGES val:33 [ 37.098340] BUG: Bad rss-counter state mm:000000002fcdae76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12054' (ECDSA) to the list of known hosts. 2023/06/20 07:10:59 fuzzer started 2023/06/20 07:10:59 dialing manager at localhost:44161 2023/06/20 07:10:59 checking machine... 2023/06/20 07:10:59 checking revisions... [ 37.800156] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:10:59 testing simple program... [ 37.842528] cgroup: Unknown subsys name 'net' [ 37.888846] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:10:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff19e637e8 CR3=0000000005482000 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=00007fbada19d510000055a8722f8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=0000000014d89d58 RCX=ffff88806c84eac0 RDX=0000000000000009 RSI=0000000000000003 RDI=00000000815a48b9 RBP=ffff88800c42a7b0 RSP=ffff888016cb7560 R8 =0000000024c32cae R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff888016cb75e8 R15=0000000000000009 RIP=ffffffff82270f2d 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 00007f98ffd48900 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=00007f99002ff618 CR3=00000000096ae000 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=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