syzkaller login: [ 30.197144] BUG: Bad rss-counter state mm:00000000a8f96da0 type:MM_FILEPAGES val:33 [ 30.198345] BUG: Bad rss-counter state mm:00000000a8f96da0 type:MM_ANONPAGES val:22 [ 30.243973] ================================================================== [ 30.245181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.246287] Read of size 8 at addr ffff88801697f310 by task sshd/220 [ 30.247184] [ 30.247436] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.248420] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.249534] Call Trace: [ 30.249902] [ 30.250227] dump_stack_lvl+0x91/0xf0 [ 30.250793] print_report+0xcc/0x620 [ 30.251361] ? __virt_addr_valid+0x102/0x340 [ 30.251990] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.252710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.253409] kasan_report+0xbe/0xf0 [ 30.253953] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.254662] vma_interval_tree_remove+0xc75/0xec0 [ 30.255370] vma_prepare+0xc54/0x11a0 [ 30.255927] __split_vma+0x5af/0x950 [ 30.256472] ? __pfx___split_vma+0x10/0x10 [ 30.257081] ? find_held_lock+0x2c/0x110 [ 30.257679] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.258330] ? lock_is_held_type+0x9f/0x120 [ 30.258950] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.259655] ? mtree_range_walk+0x632/0x900 [ 30.260302] ? mas_walk+0x5c7/0x7c0 [ 30.260859] do_vmi_munmap+0x1f1/0x2b0 [ 30.261438] mmap_region+0x1f9/0x2660 [ 30.262004] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.262599] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.263446] ? __pfx_lock_acquire+0x10/0x10 [ 30.264061] ? __pfx_mmap_region+0x10/0x10 [ 30.264672] ? security_mmap_addr+0x7d/0xa0 [ 30.265285] ? get_unmapped_area+0x1f5/0x3f0 [ 30.265949] do_mmap+0x854/0xf00 [ 30.266459] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.267036] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.267720] ksys_mmap_pgoff+0x3af/0x500 [ 30.268298] do_syscall_64+0x3f/0x90 [ 30.268840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.269769] RIP: 0033:0x7f33d91e5d82 [ 30.270285] 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 [ 30.272743] RSP: 002b:00007fff98a26e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.273766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33d91e5d82 [ 30.274730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33d861f000 [ 30.275708] RBP: 00007f33d861f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.276664] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a8770dd90 [ 30.277628] R13: 00007fff98a26e70 R14: 00007fff98a26ea0 R15: 00007fff98a27200 [ 30.278603] [ 30.278938] [ 30.279195] Allocated by task 213: [ 30.279684] kasan_save_stack+0x22/0x50 [ 30.280256] kasan_set_track+0x25/0x30 [ 30.280812] __kasan_slab_alloc+0x59/0x70 [ 30.281432] kmem_cache_alloc+0x16b/0x370 [ 30.282022] vm_area_dup+0x20/0x160 [ 30.282542] __split_vma+0x170/0x950 [ 30.283073] split_vma+0xc6/0x110 [ 30.283588] mprotect_fixup+0x8d2/0xb30 [ 30.284168] do_mprotect_pkey+0x87e/0xd40 [ 30.284756] __x64_sys_mprotect+0x78/0xc0 [ 30.285344] do_syscall_64+0x3f/0x90 [ 30.285885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286618] [ 30.286861] Freed by task 203: [ 30.287324] kasan_save_stack+0x22/0x50 [ 30.287898] kasan_set_track+0x25/0x30 [ 30.288466] kasan_save_free_info+0x2b/0x50 [ 30.289074] __kasan_slab_free+0x10a/0x190 [ 30.289675] kmem_cache_free+0x10d/0x4d0 [ 30.290249] rcu_core+0x8c8/0x2860 [ 30.290745] __do_softirq+0x1b7/0x7d4 [ 30.291307] [ 30.291554] Last potentially related work creation: [ 30.292208] kasan_save_stack+0x22/0x50 [ 30.292779] __kasan_record_aux_stack+0x8e/0xa0 [ 30.293424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.294142] remove_vma+0x139/0x170 [ 30.294647] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.295282] do_vmi_munmap+0x1f1/0x2b0 [ 30.295832] __vm_munmap+0x138/0x3a0 [ 30.296355] __x64_sys_munmap+0x59/0x80 [ 30.296910] do_syscall_64+0x3f/0x90 [ 30.297445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.298164] [ 30.298408] The buggy address belongs to the object at ffff88801697f2b8 [ 30.298408] which belongs to the cache vm_area_struct of size 168 [ 30.300062] The buggy address is located 88 bytes inside of [ 30.300062] freed 168-byte region [ffff88801697f2b8, ffff88801697f360) [ 30.301655] [ 30.301894] The buggy address belongs to the physical page: [ 30.302629] page:000000007de24403 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1697f [ 30.303876] memcg:ffff888016082501 [ 30.304353] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.305075] page_type: 0xffffffff() [ 30.305574] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.306602] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016082501 [ 30.307621] page dumped because: kasan: bad access detected [ 30.308357] [ 30.308597] Memory state around the buggy address: [ 30.309241] ffff88801697f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.310200] ffff88801697f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.311170] >ffff88801697f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.312119] ^ [ 30.312658] ffff88801697f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.313611] ffff88801697f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.314549] ================================================================== [ 30.315793] Disabling lock debugging due to kernel taint [ 32.260974] BUG: Bad rss-counter state mm:00000000d287f623 type:MM_FILEPAGES val:33 [ 32.262019] BUG: Bad rss-counter state mm:00000000d287f623 type:MM_ANONPAGES val:22 [ 32.719765] BUG: Bad rss-counter state mm:000000006d7b4a4d type:MM_FILEPAGES val:33 [ 32.720751] BUG: Bad rss-counter state mm:000000006d7b4a4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58868' (ECDSA) to the list of known hosts. 2023/06/20 21:27:23 fuzzer started 2023/06/20 21:27:23 dialing manager at localhost:36067 2023/06/20 21:27:23 checking machine... 2023/06/20 21:27:23 checking revisions... [ 33.464677] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:27:24 testing simple program... [ 33.511522] cgroup: Unknown subsys name 'net' [ 33.562167] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:27:23 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff88800e8369c0 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800e8369c0 RBP=ffff88800e8369c0 RSP=ffff8880147dfb70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880144457f0 R13=0000000000000000 R14=ffff8880147dfdf0 R15=ffff88800cbaa000 RIP=ffffffff8180fea8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9096f11900 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=00007f90962feb10 CR3=000000000d632000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=36a18ee4da446bc100000000000ae988 XMM05=eeb98e69a25d7b360000000000132e28 XMM06=19e9129bd510f2350000000000131f90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff87b89f80 RBX=ffff88800c9a0000 RCX=ffffffff812e0135 RDX=1ffff11001c7ffaa RSI=ffffffff87b89f80 RDI=ffff88800e3ffd78 RBP=ffff88800e3ffd10 RSP=ffff888016f3f8b0 R8 =0000000000000001 R9 =ffffed1002de7f05 R10=0000000000000003 R11=00030009ff02000a R12=0000000000000287 R13=ffffea0000326800 R14=ffffffff8367562f R15=00000000000000a4 RIP=ffffffff844d21b4 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 00007f66d41bc900 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=00007f66d4773618 CR3=00000000096f8000 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