syzkaller login: [ 30.808510] BUG: Bad rss-counter state mm:00000000ca848a36 type:MM_FILEPAGES val:33 [ 30.810762] BUG: Bad rss-counter state mm:00000000ca848a36 type:MM_ANONPAGES val:22 [ 30.989586] ================================================================== [ 30.990790] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.992139] Read of size 8 at addr ffff8880167cf140 by task sshd/219 [ 30.992999] [ 30.993239] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.994203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.995264] Call Trace: [ 30.995618] [ 30.995931] dump_stack_lvl+0x91/0xf0 [ 30.996481] print_report+0xcc/0x620 [ 30.997016] ? __virt_addr_valid+0x102/0x340 [ 30.997633] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998313] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998986] kasan_report+0xbe/0xf0 [ 30.999511] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.000197] vma_interval_tree_remove+0xc75/0xec0 [ 31.000899] vma_prepare+0xc54/0x11a0 [ 31.001434] __split_vma+0x5af/0x950 [ 31.001950] ? __pfx___split_vma+0x10/0x10 [ 31.002536] ? find_held_lock+0x2c/0x110 [ 31.003117] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.003744] ? lock_is_held_type+0x9f/0x120 [ 31.004342] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.004999] ? mtree_range_walk+0x632/0x900 [ 31.005598] ? mas_walk+0x5c7/0x7c0 [ 31.006108] do_vmi_munmap+0x1f1/0x2b0 [ 31.006642] mmap_region+0x1f9/0x2660 [ 31.007168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.007726] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.008517] ? __pfx_lock_acquire+0x10/0x10 [ 31.009099] ? __pfx_mmap_region+0x10/0x10 [ 31.009680] ? security_mmap_addr+0x7d/0xa0 [ 31.010259] ? get_unmapped_area+0x1f5/0x3f0 [ 31.010866] do_mmap+0x854/0xf00 [ 31.011344] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.011886] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.012514] ksys_mmap_pgoff+0x3af/0x500 [ 31.013076] do_syscall_64+0x3f/0x90 [ 31.013605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.014316] RIP: 0033:0x7f7301141d82 [ 31.014815] 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 [ 31.017134] RSP: 002b:00007ffcb6dbfb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.018121] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7301141d82 [ 31.019045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f730057b000 [ 31.019975] RBP: 00007f730057b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.020904] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f7f8e9d90 [ 31.021833] R13: 00007ffcb6dbfbb0 R14: 00007ffcb6dbfbe0 R15: 00007ffcb6dbff40 [ 31.022775] [ 31.023102] [ 31.023336] Allocated by task 212: [ 31.023811] kasan_save_stack+0x22/0x50 [ 31.024384] kasan_set_track+0x25/0x30 [ 31.024920] __kasan_slab_alloc+0x59/0x70 [ 31.025496] kmem_cache_alloc+0x16b/0x370 [ 31.026061] vm_area_dup+0x20/0x160 [ 31.026559] __split_vma+0x170/0x950 [ 31.027070] split_vma+0xc6/0x110 [ 31.027540] mprotect_fixup+0x8d2/0xb30 [ 31.028087] do_mprotect_pkey+0x87e/0xd40 [ 31.028656] __x64_sys_mprotect+0x78/0xc0 [ 31.029214] do_syscall_64+0x3f/0x90 [ 31.029728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030425] [ 31.030654] Freed by task 212: [ 31.031078] kasan_save_stack+0x22/0x50 [ 31.031625] kasan_set_track+0x25/0x30 [ 31.032159] kasan_save_free_info+0x2b/0x50 [ 31.032744] __kasan_slab_free+0x10a/0x190 [ 31.033330] kmem_cache_free+0x10d/0x4d0 [ 31.033884] rcu_core+0x8c8/0x2860 [ 31.034370] __do_softirq+0x1b7/0x7d4 [ 31.034878] [ 31.035108] Last potentially related work creation: [ 31.035732] kasan_save_stack+0x22/0x50 [ 31.036297] __kasan_record_aux_stack+0x8e/0xa0 [ 31.036917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.037605] remove_vma+0x139/0x170 [ 31.038093] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.038693] do_vmi_munmap+0x1f1/0x2b0 [ 31.039215] __vm_munmap+0x138/0x3a0 [ 31.039718] __x64_sys_munmap+0x59/0x80 [ 31.040265] do_syscall_64+0x3f/0x90 [ 31.040784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.041479] [ 31.041712] The buggy address belongs to the object at ffff8880167cf0e8 [ 31.041712] which belongs to the cache vm_area_struct of size 168 [ 31.043305] The buggy address is located 88 bytes inside of [ 31.043305] freed 168-byte region [ffff8880167cf0e8, ffff8880167cf190) [ 31.044793] [ 31.045024] The buggy address belongs to the physical page: [ 31.045720] page:00000000a21fea8a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167cf [ 31.046889] memcg:ffff88800ee9a601 [ 31.047343] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.048029] page_type: 0xffffffff() [ 31.048533] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.049512] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee9a601 [ 31.050466] page dumped because: kasan: bad access detected [ 31.051174] [ 31.051400] Memory state around the buggy address: [ 31.052004] ffff8880167cf000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.052944] ffff8880167cf080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.053867] >ffff8880167cf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.054764] ^ [ 31.055446] ffff8880167cf180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.056354] ffff8880167cf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.057266] ================================================================== [ 31.058486] Disabling lock debugging due to kernel taint [ 33.891922] BUG: Bad rss-counter state mm:00000000d15adef9 type:MM_FILEPAGES val:33 [ 33.892945] BUG: Bad rss-counter state mm:00000000d15adef9 type:MM_ANONPAGES val:22 [ 34.421617] BUG: Bad rss-counter state mm:00000000b82f40b3 type:MM_FILEPAGES val:33 [ 34.422616] BUG: Bad rss-counter state mm:00000000b82f40b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17648' (ECDSA) to the list of known hosts. 2023/06/20 01:16:16 fuzzer started 2023/06/20 01:16:16 dialing manager at localhost:44161 2023/06/20 01:16:16 checking machine... 2023/06/20 01:16:16 checking revisions... [ 35.116863] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:16:16 testing simple program... [ 35.165778] cgroup: Unknown subsys name 'net' [ 35.211434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:16:15 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=00007feb6eb8c000 CR3=00000000165dc000 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=2036313a36313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a36313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864a8f91 RBX=0000000000000001 RCX=ffffffff864a8f8c RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c951f2 RBP=ffff888016abf6c8 RSP=ffff888016abf600 R8 =ffffffff864a8f90 R9 =ffff888016abf6b0 R10=0000000000038001 R11=00000000000b3ca0 R12=ffff888016abf6d0 R13=ffff888016abf6b8 R14=ffff888016abf6b1 R15=ffff888016abf670 RIP=ffffffff81130aa4 RFL=00000212 [----A--] 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 00007f5ff4db4900 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=00007f5ff4d93020 CR3=000000001ce36000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000