syzkaller login: [ 28.713849] BUG: Bad rss-counter state mm:000000001e10e6ce type:MM_FILEPAGES val:33 [ 28.715684] BUG: Bad rss-counter state mm:000000001e10e6ce type:MM_ANONPAGES val:22 [ 28.874518] ================================================================== [ 28.875423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.876361] Read of size 8 at addr ffff88800d488a50 by task sshd/219 [ 28.877152] [ 28.877526] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.878395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.879384] Call Trace: [ 28.879730] [ 28.880019] dump_stack_lvl+0x91/0xf0 [ 28.880514] print_report+0xcc/0x620 [ 28.881013] ? __virt_addr_valid+0x102/0x340 [ 28.881574] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.882191] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.882812] kasan_report+0xbe/0xf0 [ 28.883289] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.883911] vma_interval_tree_remove+0xc75/0xec0 [ 28.884520] vma_prepare+0xc54/0x11a0 [ 28.885019] __split_vma+0x5af/0x950 [ 28.885492] ? __pfx___split_vma+0x10/0x10 [ 28.886023] ? find_held_lock+0x2c/0x110 [ 28.886556] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.887122] ? lock_is_held_type+0x9f/0x120 [ 28.887676] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.888295] ? mtree_range_walk+0x632/0x900 [ 28.888856] ? mas_walk+0x5c7/0x7c0 [ 28.889330] do_vmi_munmap+0x1f1/0x2b0 [ 28.889822] mmap_region+0x1f9/0x2660 [ 28.890315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.890837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.891556] ? __pfx_lock_acquire+0x10/0x10 [ 28.892099] ? __pfx_mmap_region+0x10/0x10 [ 28.892635] ? security_mmap_addr+0x7d/0xa0 [ 28.893178] ? get_unmapped_area+0x1f5/0x3f0 [ 28.893738] do_mmap+0x854/0xf00 [ 28.894183] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.894677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.895250] ksys_mmap_pgoff+0x3af/0x500 [ 28.895759] do_syscall_64+0x3f/0x90 [ 28.896242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.896914] RIP: 0033:0x7f66d526cd82 [ 28.897375] 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 [ 28.899510] RSP: 002b:00007ffd31cc30b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.900412] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66d526cd82 [ 28.901275] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66d46a6000 [ 28.902124] RBP: 00007f66d46a6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.902976] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588651d0ec0 [ 28.903818] R13: 00007ffd31cc30d0 R14: 00007ffd31cc3100 R15: 00007ffd31cc3460 [ 28.904677] [ 28.904987] [ 28.905200] Allocated by task 212: [ 28.905635] kasan_save_stack+0x22/0x50 [ 28.906140] kasan_set_track+0x25/0x30 [ 28.906634] __kasan_slab_alloc+0x59/0x70 [ 28.907166] kmem_cache_alloc+0x16b/0x370 [ 28.907686] vm_area_dup+0x20/0x160 [ 28.908152] __split_vma+0x170/0x950 [ 28.908629] split_vma+0xc6/0x110 [ 28.909078] mprotect_fixup+0x8d2/0xb30 [ 28.909580] do_mprotect_pkey+0x87e/0xd40 [ 28.910098] __x64_sys_mprotect+0x78/0xc0 [ 28.910630] do_syscall_64+0x3f/0x90 [ 28.911102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.911741] [ 28.911960] Freed by task 212: [ 28.912350] kasan_save_stack+0x22/0x50 [ 28.912872] kasan_set_track+0x25/0x30 [ 28.913362] kasan_save_free_info+0x2b/0x50 [ 28.913891] __kasan_slab_free+0x10a/0x190 [ 28.914418] kmem_cache_free+0x10d/0x4d0 [ 28.914933] rcu_core+0x8c8/0x2860 [ 28.915373] __do_softirq+0x1b7/0x7d4 [ 28.915858] [ 28.916075] Last potentially related work creation: [ 28.916659] kasan_save_stack+0x22/0x50 [ 28.917173] __kasan_record_aux_stack+0x8e/0xa0 [ 28.917743] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.918461] remove_vma+0x139/0x170 [ 28.918913] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.919483] do_vmi_munmap+0x1f1/0x2b0 [ 28.919969] __vm_munmap+0x138/0x3a0 [ 28.920431] __x64_sys_munmap+0x59/0x80 [ 28.920944] do_syscall_64+0x3f/0x90 [ 28.921416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922066] [ 28.922280] The buggy address belongs to the object at ffff88800d4889f8 [ 28.922280] which belongs to the cache vm_area_struct of size 168 [ 28.923738] The buggy address is located 88 bytes inside of [ 28.923738] freed 168-byte region [ffff88800d4889f8, ffff88800d488aa0) [ 28.925151] [ 28.925369] The buggy address belongs to the physical page: [ 28.926025] page:000000001053dca9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd488 [ 28.927103] memcg:ffff88800e767f01 [ 28.927527] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.928174] page_type: 0xffffffff() [ 28.928624] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.929545] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e767f01 [ 28.930449] page dumped because: kasan: bad access detected [ 28.931107] [ 28.931324] Memory state around the buggy address: [ 28.931907] ffff88800d488900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.932780] ffff88800d488980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.933648] >ffff88800d488a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.934510] ^ [ 28.935204] ffff88800d488a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 28.936052] ffff88800d488b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.936911] ================================================================== [ 28.937847] Disabling lock debugging due to kernel taint [ 30.944823] BUG: Bad rss-counter state mm:0000000042aed7d6 type:MM_FILEPAGES val:33 [ 30.946151] BUG: Bad rss-counter state mm:0000000042aed7d6 type:MM_ANONPAGES val:22 [ 31.412961] BUG: Bad rss-counter state mm:00000000db275475 type:MM_FILEPAGES val:33 [ 31.414159] BUG: Bad rss-counter state mm:00000000db275475 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54099' (ECDSA) to the list of known hosts. 2023/06/20 19:49:57 fuzzer started 2023/06/20 19:49:58 dialing manager at localhost:36067 2023/06/20 19:49:58 checking machine... 2023/06/20 19:49:58 checking revisions... [ 32.123600] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:49:58 testing simple program... [ 32.164216] cgroup: Unknown subsys name 'net' [ 32.223962] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:49:57 Registers: info registers vcpu 0 RAX=1ffff11001a16f1d RBX=ffff88800d0b78b8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d0b78e8 RBP=ffff88800d0ae700 RSP=ffff88800ab27978 R8 =0000000000000001 R9 =ffffed1001564f23 R10=0000000000000003 R11=0000000000040000 R12=dffffc0000000000 R13=ffff88800d09ba80 R14=ffffffff81803033 R15=ffff8880102ba000 RIP=ffffffff818464e2 RFL=00000046 [---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 00007ff5c5228900 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=00007ffd8b8de000 CR3=000000000f3e4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007f2a0df53570 CR3=0000000019d0c000 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=2037353a39343a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a39343a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000