syzkaller login: [ 30.850035] BUG: Bad rss-counter state mm:0000000028f0f26d type:MM_FILEPAGES val:33 [ 30.851712] BUG: Bad rss-counter state mm:0000000028f0f26d type:MM_ANONPAGES val:22 [ 31.020141] ================================================================== [ 31.021231] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.022179] Read of size 8 at addr ffff888018cf3228 by task sshd/220 [ 31.023031] [ 31.023249] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.024091] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.025081] Call Trace: [ 31.025400] [ 31.025680] dump_stack_lvl+0x91/0xf0 [ 31.026163] print_report+0xcc/0x620 [ 31.026644] ? __virt_addr_valid+0x102/0x340 [ 31.027185] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.027795] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.028398] kasan_report+0xbe/0xf0 [ 31.028880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.029489] vma_interval_tree_remove+0xc75/0xec0 [ 31.030078] vma_prepare+0xc54/0x11a0 [ 31.030550] __split_vma+0x5af/0x950 [ 31.031011] ? __pfx___split_vma+0x10/0x10 [ 31.031531] ? find_held_lock+0x2c/0x110 [ 31.032045] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.032636] ? lock_is_held_type+0x9f/0x120 [ 31.033175] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.033780] ? mtree_range_walk+0x632/0x900 [ 31.034330] ? mas_walk+0x5c7/0x7c0 [ 31.034811] do_vmi_munmap+0x1f1/0x2b0 [ 31.035300] mmap_region+0x1f9/0x2660 [ 31.035773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.036279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.036997] ? __pfx_lock_acquire+0x10/0x10 [ 31.037523] ? __pfx_mmap_region+0x10/0x10 [ 31.038057] ? security_mmap_addr+0x7d/0xa0 [ 31.038586] ? get_unmapped_area+0x1f5/0x3f0 [ 31.039127] do_mmap+0x854/0xf00 [ 31.039563] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.040051] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.040619] ksys_mmap_pgoff+0x3af/0x500 [ 31.041125] do_syscall_64+0x3f/0x90 [ 31.041597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.042236] RIP: 0033:0x7f30e853cd82 [ 31.042688] 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 [ 31.044798] RSP: 002b:00007ffcbeeaa4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.045696] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30e853cd82 [ 31.046535] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30e7976000 [ 31.047377] RBP: 00007f30e7976000 R08: 0000000000000009 R09: 0000000000001000 [ 31.048213] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad406feec0 [ 31.049075] R13: 00007ffcbeeaa510 R14: 00007ffcbeeaa540 R15: 00007ffcbeeaa8a0 [ 31.049924] [ 31.050212] [ 31.050428] Allocated by task 213: [ 31.050855] kasan_save_stack+0x22/0x50 [ 31.051357] kasan_set_track+0x25/0x30 [ 31.051850] __kasan_slab_alloc+0x59/0x70 [ 31.052365] kmem_cache_alloc+0x16b/0x370 [ 31.052883] vm_area_dup+0x20/0x160 [ 31.053333] __split_vma+0x170/0x950 [ 31.053825] split_vma+0xc6/0x110 [ 31.054260] mprotect_fixup+0x8d2/0xb30 [ 31.054759] do_mprotect_pkey+0x87e/0xd40 [ 31.055281] __x64_sys_mprotect+0x78/0xc0 [ 31.055801] do_syscall_64+0x3f/0x90 [ 31.056273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.056916] [ 31.057133] Freed by task 213: [ 31.057526] kasan_save_stack+0x22/0x50 [ 31.058026] kasan_set_track+0x25/0x30 [ 31.058525] kasan_save_free_info+0x2b/0x50 [ 31.059054] __kasan_slab_free+0x10a/0x190 [ 31.059582] kmem_cache_free+0x10d/0x4d0 [ 31.060091] rcu_core+0x8c8/0x2860 [ 31.060554] __do_softirq+0x1b7/0x7d4 [ 31.061031] [ 31.061249] Last potentially related work creation: [ 31.061833] kasan_save_stack+0x22/0x50 [ 31.062332] __kasan_record_aux_stack+0x8e/0xa0 [ 31.062921] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.063591] remove_vma+0x139/0x170 [ 31.064058] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.064650] do_vmi_munmap+0x1f1/0x2b0 [ 31.065155] __vm_munmap+0x138/0x3a0 [ 31.065632] __x64_sys_munmap+0x59/0x80 [ 31.066145] do_syscall_64+0x3f/0x90 [ 31.066636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067308] [ 31.067530] The buggy address belongs to the object at ffff888018cf31d0 [ 31.067530] which belongs to the cache vm_area_struct of size 168 [ 31.069066] The buggy address is located 88 bytes inside of [ 31.069066] freed 168-byte region [ffff888018cf31d0, ffff888018cf3278) [ 31.070522] [ 31.070745] The buggy address belongs to the physical page: [ 31.071427] page:00000000ba777f59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cf3 [ 31.072573] memcg:ffff88800c49f501 [ 31.073014] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.073684] page_type: 0xffffffff() [ 31.074148] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.075094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c49f501 [ 31.076034] page dumped because: kasan: bad access detected [ 31.076724] [ 31.076946] Memory state around the buggy address: [ 31.077538] ffff888018cf3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.078416] ffff888018cf3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.079304] >ffff888018cf3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.080181] ^ [ 31.080777] ffff888018cf3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.081665] ffff888018cf3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.082546] ================================================================== [ 31.083567] Disabling lock debugging due to kernel taint [ 32.934784] BUG: Bad rss-counter state mm:00000000e0db13b3 type:MM_FILEPAGES val:33 [ 32.935567] BUG: Bad rss-counter state mm:00000000e0db13b3 type:MM_ANONPAGES val:22 [ 33.361524] BUG: Bad rss-counter state mm:00000000fa89d540 type:MM_FILEPAGES val:33 [ 33.362604] BUG: Bad rss-counter state mm:00000000fa89d540 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12709' (ECDSA) to the list of known hosts. 2023/06/20 14:43:41 fuzzer started 2023/06/20 14:43:41 dialing manager at localhost:36067 2023/06/20 14:43:41 checking machine... 2023/06/20 14:43:41 checking revisions... [ 34.037202] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:43:41 testing simple program... [ 34.086403] cgroup: Unknown subsys name 'net' [ 34.125536] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:43:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f62b96c6110 CR3=0000000009790000 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=2031343a33343a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a33343a3431203032 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff8880167d6f98 RCX=0000000000000001 RDX=1ffff11002cfadfe RSI=ffff8880167d7ae0 RDI=ffffffff844c7d8e RBP=ffff8880167d6ff0 RSP=ffff8880167d6f80 R8 =0000000000000001 R9 =ffff8880167d6fd8 R10=0000000000038001 R11=00000000000b3f70 R12=ffff8880167d7060 R13=0000000000000000 R14=ffff88800c651b40 R15=0000000000092800 RIP=ffffffff81130399 RFL=00000202 [-------] 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 00007f1d73702900 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=00007f1d736e1020 CR3=000000000f6e2000 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