syzkaller login: [ 30.546862] BUG: Bad rss-counter state mm:00000000b0a2bb79 type:MM_FILEPAGES val:33 [ 30.548011] BUG: Bad rss-counter state mm:00000000b0a2bb79 type:MM_ANONPAGES val:22 [ 30.718321] ================================================================== [ 30.719486] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.720837] Read of size 8 at addr ffff888009975228 by task sshd/221 [ 30.721685] [ 30.721927] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.722899] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.724036] Call Trace: [ 30.724403] <TASK> [ 30.724732] dump_stack_lvl+0x91/0xf0 [ 30.725301] print_report+0xcc/0x620 [ 30.725856] ? __virt_addr_valid+0x102/0x340 [ 30.726492] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727202] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727927] kasan_report+0xbe/0xf0 [ 30.728474] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729186] vma_interval_tree_remove+0xc75/0xec0 [ 30.729882] vma_prepare+0xc54/0x11a0 [ 30.730435] __split_vma+0x5af/0x950 [ 30.730980] ? __pfx___split_vma+0x10/0x10 [ 30.731608] ? find_held_lock+0x2c/0x110 [ 30.732203] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.732848] ? lock_is_held_type+0x9f/0x120 [ 30.733470] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.734165] ? mtree_range_walk+0x632/0x900 [ 30.734798] ? mas_walk+0x5c7/0x7c0 [ 30.735345] do_vmi_munmap+0x1f1/0x2b0 [ 30.735920] mmap_region+0x1f9/0x2660 [ 30.736470] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.737057] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.737879] ? __pfx_lock_acquire+0x10/0x10 [ 30.738488] ? __pfx_mmap_region+0x10/0x10 [ 30.739089] ? security_mmap_addr+0x7d/0xa0 [ 30.739715] ? get_unmapped_area+0x1f5/0x3f0 [ 30.740347] do_mmap+0x854/0xf00 [ 30.740853] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.741415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.742056] ksys_mmap_pgoff+0x3af/0x500 [ 30.742638] do_syscall_64+0x3f/0x90 [ 30.743192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.743947] RIP: 0033:0x7f67cc0e9d82 [ 30.744471] 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 [ 30.746902] RSP: 002b:00007ffde3523e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.747953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f67cc0e9d82 [ 30.748921] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67cb523000 [ 30.749890] RBP: 00007f67cb523000 R08: 0000000000000009 R09: 0000000000001000 [ 30.750856] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fbdd2fdec0 [ 30.751837] R13: 00007ffde3523e20 R14: 00007ffde3523e50 R15: 00007ffde35241b0 [ 30.752807] </TASK> [ 30.753141] [ 30.753380] Allocated by task 214: [ 30.753870] kasan_save_stack+0x22/0x50 [ 30.754432] kasan_set_track+0x25/0x30 [ 30.754989] __kasan_slab_alloc+0x59/0x70 [ 30.755600] kmem_cache_alloc+0x16b/0x370 [ 30.756182] vm_area_dup+0x20/0x160 [ 30.756690] __split_vma+0x170/0x950 [ 30.757220] split_vma+0xc6/0x110 [ 30.757714] mprotect_fixup+0x8d2/0xb30 [ 30.758284] do_mprotect_pkey+0x87e/0xd40 [ 30.758872] __x64_sys_mprotect+0x78/0xc0 [ 30.759453] do_syscall_64+0x3f/0x90 [ 30.760005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760725] [ 30.760967] Freed by task 214: [ 30.761406] kasan_save_stack+0x22/0x50 [ 30.761971] kasan_set_track+0x25/0x30 [ 30.762528] kasan_save_free_info+0x2b/0x50 [ 30.763126] __kasan_slab_free+0x10a/0x190 [ 30.763742] kmem_cache_free+0x10d/0x4d0 [ 30.764315] rcu_core+0x8c8/0x2860 [ 30.764812] __do_softirq+0x1b7/0x7d4 [ 30.765349] [ 30.765589] Last potentially related work creation: [ 30.766253] kasan_save_stack+0x22/0x50 [ 30.766815] __kasan_record_aux_stack+0x8e/0xa0 [ 30.767457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.768158] remove_vma+0x139/0x170 [ 30.768638] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.769243] do_vmi_munmap+0x1f1/0x2b0 [ 30.769770] __vm_munmap+0x138/0x3a0 [ 30.770272] __x64_sys_munmap+0x59/0x80 [ 30.770805] do_syscall_64+0x3f/0x90 [ 30.771318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.772019] [ 30.772253] The buggy address belongs to the object at ffff8880099751d0 [ 30.772253] which belongs to the cache vm_area_struct of size 168 [ 30.773834] The buggy address is located 88 bytes inside of [ 30.773834] freed 168-byte region [ffff8880099751d0, ffff888009975278) [ 30.775343] [ 30.775580] The buggy address belongs to the physical page: [ 30.776284] page:0000000072f3adf9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9975 [ 30.777454] memcg:ffff888016954701 [ 30.777914] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.778609] page_type: 0xffffffff() [ 30.779094] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.780095] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016954701 [ 30.781057] page dumped because: kasan: bad access detected [ 30.781763] [ 30.781994] Memory state around the buggy address: [ 30.782619] ffff888009975100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.783561] ffff888009975180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.784493] >ffff888009975200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.785421] ^ [ 30.786025] ffff888009975280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.786950] ffff888009975300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.787892] ================================================================== [ 30.788925] Disabling lock debugging due to kernel taint [ 33.139848] BUG: Bad rss-counter state mm:00000000cbcdff1e type:MM_FILEPAGES val:33 [ 33.141075] BUG: Bad rss-counter state mm:00000000cbcdff1e type:MM_ANONPAGES val:22 [ 33.723997] BUG: Bad rss-counter state mm:000000008f2f0438 type:MM_FILEPAGES val:33 [ 33.725200] BUG: Bad rss-counter state mm:000000008f2f0438 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20580' (ECDSA) to the list of known hosts. 2023/06/21 04:27:20 fuzzer started 2023/06/21 04:27:20 dialing manager at localhost:36067 2023/06/21 04:27:20 checking machine... 2023/06/21 04:27:20 checking revisions... [ 34.400767] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:27:20 testing simple program... [ 34.449500] cgroup: Unknown subsys name 'net' [ 34.495920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:27:20 Registers: info registers vcpu 0 RAX=0000000000010b8d RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000000011 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffff888017a0fab8 RSP=ffff888017a0f9e0 R8 =ffffffff860d8256 R9 =ffff888017a0faa0 R10=0000000000038001 R11=0000000000010b8d R12=ffff888017a0fac0 R13=ffff888017a0faa8 R14=ffff888017a0faa1 R15=ffff888017a0fa60 RIP=ffffffff8112fc12 RFL=00000206 [-----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 00007fde66077900 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=00007fde6662c650 CR3=000000000e99e000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff1100d9e1329 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806cf09938 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000247 [---Z-PC] 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 00007f010e2f5900 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=00007f010d77b6b0 CR3=000000000c7a6000 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=e13794d48ba7a18e00000000000ae988 XMM05=0e01f0b2db92bee20000000000132ae0 XMM06=c291bd5c70af25b900000000001318d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000