syzkaller login: [ 38.697344] BUG: Bad rss-counter state mm:00000000c7563689 type:MM_FILEPAGES val:33 [ 38.698357] BUG: Bad rss-counter state mm:00000000c7563689 type:MM_ANONPAGES val:22 [ 38.858677] ================================================================== [ 38.859577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.860550] Read of size 8 at addr ffff8880098eb4e0 by task sshd/220 [ 38.861329] [ 38.861545] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.862501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.863479] Call Trace: [ 38.863799] [ 38.864097] dump_stack_lvl+0x91/0xf0 [ 38.864590] print_report+0xcc/0x620 [ 38.865076] ? __virt_addr_valid+0x102/0x340 [ 38.865630] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.866254] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.866871] kasan_report+0xbe/0xf0 [ 38.867347] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.867972] vma_interval_tree_remove+0xc75/0xec0 [ 38.868615] vma_prepare+0xc54/0x11a0 [ 38.869094] __split_vma+0x5af/0x950 [ 38.869569] ? __pfx___split_vma+0x10/0x10 [ 38.870112] ? find_held_lock+0x2c/0x110 [ 38.870638] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.871211] ? lock_is_held_type+0x9f/0x120 [ 38.871764] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.872396] ? mtree_range_walk+0x632/0x900 [ 38.872961] ? mas_walk+0x5c7/0x7c0 [ 38.873453] do_vmi_munmap+0x1f1/0x2b0 [ 38.873970] mmap_region+0x1f9/0x2660 [ 38.874464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.874990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.875713] ? __pfx_lock_acquire+0x10/0x10 [ 38.876261] ? __pfx_mmap_region+0x10/0x10 [ 38.876807] ? security_mmap_addr+0x7d/0xa0 [ 38.877344] ? get_unmapped_area+0x1f5/0x3f0 [ 38.877918] do_mmap+0x854/0xf00 [ 38.878365] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.878869] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.879439] ksys_mmap_pgoff+0x3af/0x500 [ 38.879950] do_syscall_64+0x3f/0x90 [ 38.880453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.881108] RIP: 0033:0x7f8d4c57fd82 [ 38.881571] 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 [ 38.883760] RSP: 002b:00007ffe1c254408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.884703] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d4c57fd82 [ 38.885563] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d4b9b9000 [ 38.886417] RBP: 00007f8d4b9b9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.887287] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aac9961ec0 [ 38.888166] R13: 00007ffe1c254420 R14: 00007ffe1c254450 R15: 00007ffe1c2547b0 [ 38.889034] [ 38.889332] [ 38.889554] Allocated by task 212: [ 38.889990] kasan_save_stack+0x22/0x50 [ 38.890511] kasan_set_track+0x25/0x30 [ 38.891013] __kasan_slab_alloc+0x59/0x70 [ 38.891545] kmem_cache_alloc+0x16b/0x370 [ 38.892084] vm_area_dup+0x20/0x160 [ 38.892547] __split_vma+0x170/0x950 [ 38.893029] split_vma+0xc6/0x110 [ 38.893473] mprotect_fixup+0x8d2/0xb30 [ 38.893983] do_mprotect_pkey+0x87e/0xd40 [ 38.894510] __x64_sys_mprotect+0x78/0xc0 [ 38.895031] do_syscall_64+0x3f/0x90 [ 38.895512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896176] [ 38.896398] Freed by task 210: [ 38.896791] kasan_save_stack+0x22/0x50 [ 38.897305] kasan_set_track+0x25/0x30 [ 38.897816] kasan_save_free_info+0x2b/0x50 [ 38.898348] __kasan_slab_free+0x10a/0x190 [ 38.898893] kmem_cache_free+0x10d/0x4d0 [ 38.899427] rcu_core+0x8c8/0x2860 [ 38.899879] __do_softirq+0x1b7/0x7d4 [ 38.900385] [ 38.900603] Last potentially related work creation: [ 38.901203] kasan_save_stack+0x22/0x50 [ 38.901713] __kasan_record_aux_stack+0x8e/0xa0 [ 38.902294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.902940] remove_vma+0x139/0x170 [ 38.903394] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.903958] do_vmi_munmap+0x1f1/0x2b0 [ 38.904474] __vm_munmap+0x138/0x3a0 [ 38.904948] __x64_sys_munmap+0x59/0x80 [ 38.905451] do_syscall_64+0x3f/0x90 [ 38.905922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906566] [ 38.906782] The buggy address belongs to the object at ffff8880098eb488 [ 38.906782] which belongs to the cache vm_area_struct of size 168 [ 38.908275] The buggy address is located 88 bytes inside of [ 38.908275] freed 168-byte region [ffff8880098eb488, ffff8880098eb530) [ 38.909682] [ 38.909898] The buggy address belongs to the physical page: [ 38.910563] page:0000000058da9d43 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98eb [ 38.911655] memcg:ffff88800d139401 [ 38.912115] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.912818] page_type: 0xffffffff() [ 38.913275] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 38.914200] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d139401 [ 38.915117] page dumped because: kasan: bad access detected [ 38.915796] [ 38.916013] Memory state around the buggy address: [ 38.916609] ffff8880098eb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.917506] ffff8880098eb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.918388] >ffff8880098eb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.919263] ^ [ 38.920032] ffff8880098eb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.920936] ffff8880098eb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.921801] ================================================================== [ 38.922801] Disabling lock debugging due to kernel taint [ 40.868254] BUG: Bad rss-counter state mm:00000000dd04f71b type:MM_FILEPAGES val:33 [ 40.869551] BUG: Bad rss-counter state mm:00000000dd04f71b type:MM_ANONPAGES val:22 [ 41.315308] BUG: Bad rss-counter state mm:00000000d2380029 type:MM_FILEPAGES val:33 [ 41.316393] BUG: Bad rss-counter state mm:00000000d2380029 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36432' (ECDSA) to the list of known hosts. 2023/06/19 23:08:13 fuzzer started 2023/06/19 23:08:13 dialing manager at localhost:44161 2023/06/19 23:08:13 checking machine... 2023/06/19 23:08:13 checking revisions... [ 42.001451] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:08:13 testing simple program... [ 42.048230] cgroup: Unknown subsys name 'net' [ 42.097762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:08:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888006ad9b40 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888006b0f698 RSP=ffff888006b0f620 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000482cc0 R14=ffffffff8366cbd9 R15=0000000000000000 RIP=ffffffff81838c9c RFL=00000246 [---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 00007fd151a45900 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=00007f9078199650 CR3=0000000009476000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=589c3d8b6b32e9f300000000000ae988 XMM05=b3781f1b1091d1f50000000000134b88 XMM06=19e9129bd510f2350000000000133a20 XMM07=fb795ef6d65770560000000000123e68 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613dd30 RDX=1ffff110039b3e5e RSI=1ffff110039b3e5d RDI=1ffff110039b3e5d RBP=ffff88801cd9f2e8 RSP=ffff88801cd9f220 R8 =ffffffff8613dd34 R9 =ffff88801cd9f2d0 R10=0000000000038001 R11=0000000000021ee6 R12=ffff88801cd9f2f0 R13=ffff88801cd9f2d8 R14=ffff88801cd9f510 R15=ffff88801cd9f290 RIP=ffffffff811310ce RFL=00000246 [---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 00007f9077be4900 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=00007f907819b618 CR3=00000000146b8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000