syzkaller login: [ 30.765446] BUG: Bad rss-counter state mm:00000000ac7b4c20 type:MM_FILEPAGES val:33 [ 30.766675] BUG: Bad rss-counter state mm:00000000ac7b4c20 type:MM_ANONPAGES val:22 [ 30.809834] ================================================================== [ 30.810733] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.811681] Read of size 8 at addr ffff8880166df6b0 by task sshd/220 [ 30.812483] [ 30.812704] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.813576] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.814560] Call Trace: [ 30.814879] [ 30.815174] dump_stack_lvl+0x91/0xf0 [ 30.815666] print_report+0xcc/0x620 [ 30.816160] ? __virt_addr_valid+0x102/0x340 [ 30.816717] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.817341] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.817959] kasan_report+0xbe/0xf0 [ 30.818438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819063] vma_interval_tree_remove+0xc75/0xec0 [ 30.819664] vma_prepare+0xc54/0x11a0 [ 30.820157] __split_vma+0x5af/0x950 [ 30.820638] ? __pfx___split_vma+0x10/0x10 [ 30.821166] ? find_held_lock+0x2c/0x110 [ 30.821680] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.822241] ? lock_is_held_type+0x9f/0x120 [ 30.822774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.823387] ? mtree_range_walk+0x632/0x900 [ 30.823955] ? mas_walk+0x5c7/0x7c0 [ 30.824427] do_vmi_munmap+0x1f1/0x2b0 [ 30.824912] mmap_region+0x1f9/0x2660 [ 30.825392] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.825903] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.826605] ? __pfx_lock_acquire+0x10/0x10 [ 30.827127] ? __pfx_mmap_region+0x10/0x10 [ 30.827656] ? security_mmap_addr+0x7d/0xa0 [ 30.828195] ? get_unmapped_area+0x1f5/0x3f0 [ 30.828740] do_mmap+0x854/0xf00 [ 30.829172] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.829661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.830227] ksys_mmap_pgoff+0x3af/0x500 [ 30.830735] do_syscall_64+0x3f/0x90 [ 30.831208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.831869] RIP: 0033:0x7f73ecc66d82 [ 30.832329] 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 [ 30.834439] RSP: 002b:00007fffaf06ef78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.835339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73ecc66d82 [ 30.836184] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73ec0a0000 [ 30.837024] RBP: 00007f73ec0a0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.837862] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e59ef1ec0 [ 30.838692] R13: 00007fffaf06ef90 R14: 00007fffaf06efc0 R15: 00007fffaf06f320 [ 30.839533] [ 30.839830] [ 30.840042] Allocated by task 213: [ 30.840467] kasan_save_stack+0x22/0x50 [ 30.840964] kasan_set_track+0x25/0x30 [ 30.841460] __kasan_slab_alloc+0x59/0x70 [ 30.841977] kmem_cache_alloc+0x16b/0x370 [ 30.842498] vm_area_dup+0x20/0x160 [ 30.842952] __split_vma+0x170/0x950 [ 30.843409] split_vma+0xc6/0x110 [ 30.843873] mprotect_fixup+0x8d2/0xb30 [ 30.844369] do_mprotect_pkey+0x87e/0xd40 [ 30.844888] __x64_sys_mprotect+0x78/0xc0 [ 30.845404] do_syscall_64+0x3f/0x90 [ 30.845876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.846519] [ 30.846732] Freed by task 213: [ 30.847119] kasan_save_stack+0x22/0x50 [ 30.847618] kasan_set_track+0x25/0x30 [ 30.848120] kasan_save_free_info+0x2b/0x50 [ 30.848650] __kasan_slab_free+0x10a/0x190 [ 30.849181] kmem_cache_free+0x10d/0x4d0 [ 30.849683] rcu_core+0x8c8/0x2860 [ 30.850126] __do_softirq+0x1b7/0x7d4 [ 30.850599] [ 30.850811] Last potentially related work creation: [ 30.851396] kasan_save_stack+0x22/0x50 [ 30.851901] __kasan_record_aux_stack+0x8e/0xa0 [ 30.852470] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.853113] remove_vma+0x139/0x170 [ 30.853563] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.854127] do_vmi_munmap+0x1f1/0x2b0 [ 30.854612] __vm_munmap+0x138/0x3a0 [ 30.855072] __x64_sys_munmap+0x59/0x80 [ 30.855567] do_syscall_64+0x3f/0x90 [ 30.856049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.856693] [ 30.856906] The buggy address belongs to the object at ffff8880166df658 [ 30.856906] which belongs to the cache vm_area_struct of size 168 [ 30.858372] The buggy address is located 88 bytes inside of [ 30.858372] freed 168-byte region [ffff8880166df658, ffff8880166df700) [ 30.859764] [ 30.859978] The buggy address belongs to the physical page: [ 30.860628] page:0000000030794081 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166df [ 30.861714] memcg:ffff88800e9c5201 [ 30.862144] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.862785] page_type: 0xffffffff() [ 30.863236] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.864156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9c5201 [ 30.865069] page dumped because: kasan: bad access detected [ 30.865725] [ 30.865937] Memory state around the buggy address: [ 30.866515] ffff8880166df580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.867367] ffff8880166df600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.868225] >ffff8880166df680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.869065] ^ [ 30.869666] ffff8880166df700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.870529] ffff8880166df780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.871383] ================================================================== [ 30.872721] Disabling lock debugging due to kernel taint [ 32.811075] BUG: Bad rss-counter state mm:00000000659aa0d6 type:MM_FILEPAGES val:33 [ 32.812299] BUG: Bad rss-counter state mm:00000000659aa0d6 type:MM_ANONPAGES val:22 [ 33.254133] BUG: Bad rss-counter state mm:000000003925c725 type:MM_FILEPAGES val:33 [ 33.255160] BUG: Bad rss-counter state mm:000000003925c725 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25889' (ECDSA) to the list of known hosts. 2023/06/19 14:25:40 fuzzer started 2023/06/19 14:25:41 dialing manager at localhost:44161 2023/06/19 14:25:41 checking machine... 2023/06/19 14:25:41 checking revisions... [ 33.940395] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:25:41 testing simple program... [ 33.990347] cgroup: Unknown subsys name 'net' [ 34.037932] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:25:40 Registers: info registers vcpu 0 RAX=1ffffffff0c0a745 RBX=ffffffff86053a2c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a2c RSP=ffff888014707210 R8 =ffffffff864b9d50 R9 =ffff888014707308 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f2d6c13e900 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=0000557892972768 CR3=000000000ca74000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8c5fe0ce33ae440e00000000000ae988 XMM05=e015bfee478658870000000000134bf0 XMM06=4fda316b135da52b0000000000133c58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007fff59d4a598 CR3=0000000005482000 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=00007fb6aafb5510000055f0b0798790 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