syzkaller login: [ 29.083688] BUG: Bad rss-counter state mm:000000005cb8f8d0 type:MM_FILEPAGES val:31 [ 29.084732] BUG: Bad rss-counter state mm:000000005cb8f8d0 type:MM_ANONPAGES val:22 [ 29.286259] ================================================================== [ 29.287332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.288456] Read of size 8 at addr ffff88800c547058 by task sshd/220 [ 29.289440] [ 29.289658] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.290530] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.291529] Call Trace: [ 29.291863] [ 29.292147] dump_stack_lvl+0x91/0xf0 [ 29.292640] print_report+0xcc/0x620 [ 29.293128] ? __virt_addr_valid+0x102/0x340 [ 29.293681] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.294295] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.294907] kasan_report+0xbe/0xf0 [ 29.295389] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.296058] vma_interval_tree_remove+0xc75/0xec0 [ 29.296696] vma_prepare+0xc54/0x11a0 [ 29.297199] __split_vma+0x5af/0x950 [ 29.297701] ? __pfx___split_vma+0x10/0x10 [ 29.298265] ? find_held_lock+0x2c/0x110 [ 29.298808] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.299411] ? lock_is_held_type+0x9f/0x120 [ 29.300008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.300655] ? mtree_range_walk+0x632/0x900 [ 29.301254] ? mas_walk+0x5c7/0x7c0 [ 29.301755] do_vmi_munmap+0x1f1/0x2b0 [ 29.302284] mmap_region+0x1f9/0x2660 [ 29.302803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.303344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.304118] ? __pfx_lock_acquire+0x10/0x10 [ 29.304670] ? __pfx_mmap_region+0x10/0x10 [ 29.305202] ? security_mmap_addr+0x7d/0xa0 [ 29.305729] ? get_unmapped_area+0x1f5/0x3f0 [ 29.306281] do_mmap+0x854/0xf00 [ 29.306724] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.307221] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.307796] ksys_mmap_pgoff+0x3af/0x500 [ 29.308304] do_syscall_64+0x3f/0x90 [ 29.308780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.309436] RIP: 0033:0x7fbcbc4a4d82 [ 29.309893] 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 [ 29.312064] RSP: 002b:00007fffa092a858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.312988] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbcbc4a4d82 [ 29.313848] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcbb8de000 [ 29.314700] RBP: 00007fbcbb8de000 R08: 0000000000000009 R09: 0000000000001000 [ 29.315546] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a83555ab20 [ 29.316416] R13: 00007fffa092a870 R14: 00007fffa092a8a0 R15: 00007fffa092ac00 [ 29.317286] [ 29.317583] [ 29.317800] Allocated by task 213: [ 29.318235] kasan_save_stack+0x22/0x50 [ 29.318751] kasan_set_track+0x25/0x30 [ 29.319251] __kasan_slab_alloc+0x59/0x70 [ 29.319790] kmem_cache_alloc+0x16b/0x370 [ 29.320309] vm_area_dup+0x20/0x160 [ 29.320771] __split_vma+0x170/0x950 [ 29.321245] split_vma+0xc6/0x110 [ 29.321696] mprotect_fixup+0x8d2/0xb30 [ 29.322211] do_mprotect_pkey+0x87e/0xd40 [ 29.322741] __x64_sys_mprotect+0x78/0xc0 [ 29.323271] do_syscall_64+0x3f/0x90 [ 29.323770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.324440] [ 29.324657] Freed by task 204: [ 29.325053] kasan_save_stack+0x22/0x50 [ 29.325562] kasan_set_track+0x25/0x30 [ 29.326058] kasan_save_free_info+0x2b/0x50 [ 29.326607] __kasan_slab_free+0x10a/0x190 [ 29.327142] kmem_cache_free+0x10d/0x4d0 [ 29.327659] rcu_core+0x8c8/0x2860 [ 29.328109] __do_softirq+0x1b7/0x7d4 [ 29.328597] [ 29.328816] Last potentially related work creation: [ 29.329408] kasan_save_stack+0x22/0x50 [ 29.329927] __kasan_record_aux_stack+0x8e/0xa0 [ 29.330504] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.331175] remove_vma+0x139/0x170 [ 29.331643] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.332253] do_vmi_munmap+0x1f1/0x2b0 [ 29.332776] __vm_munmap+0x138/0x3a0 [ 29.333268] __x64_sys_munmap+0x59/0x80 [ 29.333789] do_syscall_64+0x3f/0x90 [ 29.334301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.334980] [ 29.335207] Second to last potentially related work creation: [ 29.335947] kasan_save_stack+0x22/0x50 [ 29.336477] __kasan_record_aux_stack+0x8e/0xa0 [ 29.337074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.337747] remove_vma+0x139/0x170 [ 29.338333] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.339117] do_vmi_munmap+0x1f1/0x2b0 [ 29.339827] mmap_region+0x1f9/0x2660 [ 29.340494] do_mmap+0x854/0xf00 [ 29.340969] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.341644] ksys_mmap_pgoff+0x3af/0x500 [ 29.342364] do_syscall_64+0x3f/0x90 [ 29.343049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.343980] [ 29.344287] The buggy address belongs to the object at ffff88800c547000 [ 29.344287] which belongs to the cache vm_area_struct of size 168 [ 29.346223] The buggy address is located 88 bytes inside of [ 29.346223] freed 168-byte region [ffff88800c547000, ffff88800c5470a8) [ 29.347773] [ 29.348012] The buggy address belongs to the physical page: [ 29.348717] page:000000001bd16653 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc547 [ 29.349889] memcg:ffff888014587d01 [ 29.350498] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.351320] page_type: 0xffffffff() [ 29.351827] raw: 0100000000000200 ffff8880087a0c80 ffffea0000390080 dead000000000008 [ 29.352825] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014587d01 [ 29.353822] page dumped because: kasan: bad access detected [ 29.354560] [ 29.354790] Memory state around the buggy address: [ 29.355423] ffff88800c546f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 29.356375] ffff88800c546f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.357324] >ffff88800c547000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.358297] ^ [ 29.359076] ffff88800c547080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 29.360012] ffff88800c547100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.360931] ================================================================== [ 29.361959] Disabling lock debugging due to kernel taint [ 30.995802] BUG: Bad rss-counter state mm:00000000272bda20 type:MM_FILEPAGES val:33 [ 30.996571] BUG: Bad rss-counter state mm:00000000272bda20 type:MM_ANONPAGES val:22 [ 31.309864] BUG: Bad rss-counter state mm:00000000394aff35 type:MM_FILEPAGES val:33 [ 31.310976] BUG: Bad rss-counter state mm:00000000394aff35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59852' (ECDSA) to the list of known hosts. 2023/06/20 17:58:51 fuzzer started 2023/06/20 17:58:52 dialing manager at localhost:36067 2023/06/20 17:58:52 checking machine... 2023/06/20 17:58:52 checking revisions... [ 32.040046] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:58:52 testing simple program... [ 32.089959] cgroup: Unknown subsys name 'net' [ 32.142879] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:58:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f864148a3ec RCX=0000000000000000 RDX=ffff88801478d1c0 RSI=00007ffffffff000 RDI=00007f864148a3ec RBP=00007ffffffff000 RSP=ffff88801a0eff00 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f864148a000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007f864148a3ec R15=0000000000000000 RIP=ffffffff814c0370 RFL=00000093 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f86410ee900 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=00007f864148a3ec CR3=000000001be64000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f189b4ae7a0 CR3=0000000016ec4000 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=2031353a38353a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a38353a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000