syzkaller login: [ 30.810663] BUG: Bad rss-counter state mm:0000000058e0d697 type:MM_FILEPAGES val:33 [ 30.812159] BUG: Bad rss-counter state mm:0000000058e0d697 type:MM_ANONPAGES val:22 [ 30.972216] ================================================================== [ 30.973185] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.974177] Read of size 8 at addr ffff88800fb04798 by task sshd/220 [ 30.974975] [ 30.975205] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.976295] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.977319] Call Trace: [ 30.977675] [ 30.977975] dump_stack_lvl+0x91/0xf0 [ 30.978504] print_report+0xcc/0x620 [ 30.979004] ? __virt_addr_valid+0x102/0x340 [ 30.979578] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980220] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.980866] kasan_report+0xbe/0xf0 [ 30.981357] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.982010] vma_interval_tree_remove+0xc75/0xec0 [ 30.982641] vma_prepare+0xc54/0x11a0 [ 30.983132] __split_vma+0x5af/0x950 [ 30.983627] ? __pfx___split_vma+0x10/0x10 [ 30.984185] ? find_held_lock+0x2c/0x110 [ 30.984733] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.985317] ? lock_is_held_type+0x9f/0x120 [ 30.985906] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.986532] ? mtree_range_walk+0x632/0x900 [ 30.987116] ? mas_walk+0x5c7/0x7c0 [ 30.987613] do_vmi_munmap+0x1f1/0x2b0 [ 30.988128] mmap_region+0x1f9/0x2660 [ 30.988625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.989160] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.989916] ? __pfx_lock_acquire+0x10/0x10 [ 30.990472] ? __pfx_mmap_region+0x10/0x10 [ 30.991023] ? security_mmap_addr+0x7d/0xa0 [ 30.991583] ? get_unmapped_area+0x1f5/0x3f0 [ 30.992155] do_mmap+0x854/0xf00 [ 30.992609] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.993115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.993710] ksys_mmap_pgoff+0x3af/0x500 [ 30.994242] do_syscall_64+0x3f/0x90 [ 30.994741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.995417] RIP: 0033:0x7f880fa35d82 [ 30.995891] 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 [ 30.998129] RSP: 002b:00007ffd46c0f0a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.999076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f880fa35d82 [ 30.999954] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f880ee6f000 [ 31.000830] RBP: 00007f880ee6f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.001724] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561ff75c4b20 [ 31.002597] R13: 00007ffd46c0f0c0 R14: 00007ffd46c0f0f0 R15: 00007ffd46c0f450 [ 31.003479] [ 31.003780] [ 31.004002] Allocated by task 213: [ 31.004446] kasan_save_stack+0x22/0x50 [ 31.004970] kasan_set_track+0x25/0x30 [ 31.005491] __kasan_slab_alloc+0x59/0x70 [ 31.006020] kmem_cache_alloc+0x16b/0x370 [ 31.006545] vm_area_dup+0x20/0x160 [ 31.006998] __split_vma+0x170/0x950 [ 31.007464] split_vma+0xc6/0x110 [ 31.007906] mprotect_fixup+0x8d2/0xb30 [ 31.008418] do_mprotect_pkey+0x87e/0xd40 [ 31.008944] __x64_sys_mprotect+0x78/0xc0 [ 31.009474] do_syscall_64+0x3f/0x90 [ 31.009964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.010605] [ 31.010821] Freed by task 213: [ 31.011216] kasan_save_stack+0x22/0x50 [ 31.011726] kasan_set_track+0x25/0x30 [ 31.012231] kasan_save_free_info+0x2b/0x50 [ 31.012779] __kasan_slab_free+0x10a/0x190 [ 31.013319] kmem_cache_free+0x10d/0x4d0 [ 31.013834] rcu_core+0x8c8/0x2860 [ 31.014275] __do_softirq+0x1b7/0x7d4 [ 31.014759] [ 31.014972] Last potentially related work creation: [ 31.015559] kasan_save_stack+0x22/0x50 [ 31.016057] __kasan_record_aux_stack+0x8e/0xa0 [ 31.016638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.017377] remove_vma+0x139/0x170 [ 31.017836] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.018401] do_vmi_munmap+0x1f1/0x2b0 [ 31.018881] __vm_munmap+0x138/0x3a0 [ 31.019347] __x64_sys_munmap+0x59/0x80 [ 31.019839] do_syscall_64+0x3f/0x90 [ 31.020310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.020950] [ 31.021164] The buggy address belongs to the object at ffff88800fb04740 [ 31.021164] which belongs to the cache vm_area_struct of size 168 [ 31.022631] The buggy address is located 88 bytes inside of [ 31.022631] freed 168-byte region [ffff88800fb04740, ffff88800fb047e8) [ 31.024033] [ 31.024248] The buggy address belongs to the physical page: [ 31.024912] page:00000000efa28aca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb04 [ 31.026023] memcg:ffff88800ce1e101 [ 31.026448] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.027089] page_type: 0xffffffff() [ 31.027541] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.028450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce1e101 [ 31.029350] page dumped because: kasan: bad access detected [ 31.030020] [ 31.030236] Memory state around the buggy address: [ 31.030817] ffff88800fb04680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.031671] ffff88800fb04700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.032534] >ffff88800fb04780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.033388] ^ [ 31.033880] ffff88800fb04800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.034743] ffff88800fb04880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.035600] ================================================================== [ 31.036544] Disabling lock debugging due to kernel taint [ 32.886368] BUG: Bad rss-counter state mm:000000003e34d0fc type:MM_FILEPAGES val:33 [ 32.887117] BUG: Bad rss-counter state mm:000000003e34d0fc type:MM_ANONPAGES val:22 [ 33.335532] BUG: Bad rss-counter state mm:00000000980b5aaa type:MM_FILEPAGES val:33 [ 33.336764] BUG: Bad rss-counter state mm:00000000980b5aaa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5540' (ECDSA) to the list of known hosts. 2023/06/21 03:10:26 fuzzer started 2023/06/21 03:10:27 dialing manager at localhost:36067 2023/06/21 03:10:27 checking machine... 2023/06/21 03:10:27 checking revisions... [ 34.057956] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:10:27 testing simple program... [ 34.113555] cgroup: Unknown subsys name 'net' [ 34.160440] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:10:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888017b8b680 RSI=ffffffff81ed2cbe RDI=ffff888008c7c000 RBP=ffff888008c7c000 RSP=ffff888016647ee8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81ec69a4 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 00007f221cb3f900 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=00007f221caf301c CR3=000000000e1ce000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff8880146e83f4 RBP=ffff8880146e8000 RSP=ffff8880146e7838 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000092cc0 RIP=ffffffff813744e1 RFL=00000217 [----APC] 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 00007f8aa1ebe900 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=00007f8aa132de30 CR3=0000000013932000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=027b513bd1a620f400000000000ae988 XMM05=a7413462d4237de40000000000133178 XMM06=4fda316b135da52b0000000000131f68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000