syzkaller login: [ 38.728291] BUG: Bad rss-counter state mm:000000002c003fff type:MM_FILEPAGES val:33 [ 38.729807] BUG: Bad rss-counter state mm:000000002c003fff type:MM_ANONPAGES val:22 [ 38.904497] ================================================================== [ 38.905387] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.906362] Read of size 8 at addr ffff88801b81f3f8 by task sshd/221 [ 38.907153] [ 38.907469] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.908370] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.909362] Call Trace: [ 38.909707] [ 38.910000] dump_stack_lvl+0x91/0xf0 [ 38.910493] print_report+0xcc/0x620 [ 38.910997] ? __virt_addr_valid+0x102/0x340 [ 38.911585] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.912198] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.912820] kasan_report+0xbe/0xf0 [ 38.913295] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913944] vma_interval_tree_remove+0xc75/0xec0 [ 38.914558] vma_prepare+0xc54/0x11a0 [ 38.915051] __split_vma+0x5af/0x950 [ 38.915538] ? __pfx___split_vma+0x10/0x10 [ 38.916088] ? find_held_lock+0x2c/0x110 [ 38.916614] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.917194] ? lock_is_held_type+0x9f/0x120 [ 38.917749] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.918361] ? mtree_range_walk+0x632/0x900 [ 38.918923] ? mas_walk+0x5c7/0x7c0 [ 38.919403] do_vmi_munmap+0x1f1/0x2b0 [ 38.919929] mmap_region+0x1f9/0x2660 [ 38.920415] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.920944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.921663] ? __pfx_lock_acquire+0x10/0x10 [ 38.922214] ? __pfx_mmap_region+0x10/0x10 [ 38.922744] ? security_mmap_addr+0x7d/0xa0 [ 38.923291] ? get_unmapped_area+0x1f5/0x3f0 [ 38.923875] do_mmap+0x854/0xf00 [ 38.924326] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.924824] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.925394] ksys_mmap_pgoff+0x3af/0x500 [ 38.925921] do_syscall_64+0x3f/0x90 [ 38.926408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927076] RIP: 0033:0x7fec85906d82 [ 38.927544] 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 [ 38.929694] RSP: 002b:00007ffc3de14ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.930636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec85906d82 [ 38.931493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec84d40000 [ 38.932396] RBP: 00007fec84d40000 R08: 0000000000000009 R09: 0000000000001000 [ 38.933257] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560734c69ec0 [ 38.934122] R13: 00007ffc3de14ad0 R14: 00007ffc3de14b00 R15: 00007ffc3de14e60 [ 38.934980] [ 38.935285] [ 38.935503] Allocated by task 213: [ 38.935959] kasan_save_stack+0x22/0x50 [ 38.936486] kasan_set_track+0x25/0x30 [ 38.936995] __kasan_slab_alloc+0x59/0x70 [ 38.937538] kmem_cache_alloc+0x16b/0x370 [ 38.938054] vm_area_dup+0x20/0x160 [ 38.938525] __split_vma+0x170/0x950 [ 38.939011] split_vma+0xc6/0x110 [ 38.939469] mprotect_fixup+0x8d2/0xb30 [ 38.939998] do_mprotect_pkey+0x87e/0xd40 [ 38.940538] __x64_sys_mprotect+0x78/0xc0 [ 38.941059] do_syscall_64+0x3f/0x90 [ 38.941552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.942197] [ 38.942429] Freed by task 213: [ 38.942819] kasan_save_stack+0x22/0x50 [ 38.943338] kasan_set_track+0x25/0x30 [ 38.943847] kasan_save_free_info+0x2b/0x50 [ 38.944396] __kasan_slab_free+0x10a/0x190 [ 38.944932] kmem_cache_free+0x10d/0x4d0 [ 38.945456] rcu_core+0x8c8/0x2860 [ 38.945901] __do_softirq+0x1b7/0x7d4 [ 38.946389] [ 38.946651] Last potentially related work creation: [ 38.947366] kasan_save_stack+0x22/0x50 [ 38.948001] __kasan_record_aux_stack+0x8e/0xa0 [ 38.948704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.949495] remove_vma+0x139/0x170 [ 38.950060] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.950751] do_vmi_munmap+0x1f1/0x2b0 [ 38.951344] __vm_munmap+0x138/0x3a0 [ 38.951944] __x64_sys_munmap+0x59/0x80 [ 38.952551] do_syscall_64+0x3f/0x90 [ 38.953134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953922] [ 38.954186] The buggy address belongs to the object at ffff88801b81f3a0 [ 38.954186] which belongs to the cache vm_area_struct of size 168 [ 38.955983] The buggy address is located 88 bytes inside of [ 38.955983] freed 168-byte region [ffff88801b81f3a0, ffff88801b81f448) [ 38.957693] [ 38.957960] The buggy address belongs to the physical page: [ 38.958760] page:0000000018aa04d6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b81f [ 38.960112] memcg:ffff88800ec84b01 [ 38.960639] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.961434] page_type: 0xffffffff() [ 38.961984] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.963092] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec84b01 [ 38.964227] page dumped because: kasan: bad access detected [ 38.965024] [ 38.965284] Memory state around the buggy address: [ 38.965984] ffff88801b81f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.967006] ffff88801b81f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.968051] >ffff88801b81f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.969085] ^ [ 38.970116] ffff88801b81f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.971156] ffff88801b81f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.972204] ================================================================== [ 38.973386] Disabling lock debugging due to kernel taint [ 41.061831] BUG: Bad rss-counter state mm:000000006c2b0bee type:MM_FILEPAGES val:33 [ 41.063011] BUG: Bad rss-counter state mm:000000006c2b0bee type:MM_ANONPAGES val:22 [ 41.555387] BUG: Bad rss-counter state mm:00000000b6c0f10b type:MM_FILEPAGES val:33 [ 41.556640] BUG: Bad rss-counter state mm:00000000b6c0f10b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65493' (ECDSA) to the list of known hosts. 2023/06/21 05:08:27 fuzzer started 2023/06/21 05:08:27 dialing manager at localhost:36067 2023/06/21 05:08:27 checking machine... 2023/06/21 05:08:27 checking revisions... [ 42.229931] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:08:27 testing simple program... [ 42.279921] cgroup: Unknown subsys name 'net' [ 42.342912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:08:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880168a3300 RCX=ffff8880087b23c0 RDX=ffffea000039ab40 RSI=ffff88800daf9f40 RDI=ffff888008441500 RBP=0000000000000000 RSP=ffff88801be4f948 R8 =ffff88800e6ad4e0 R9 =0000000000000000 R10=ffffea000036be40 R11=000000000040001b R12=dffffc0000000000 R13=ffff88801be4f988 R14=ffff8880087b23c0 R15=ffff88800daf9f40 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f2e2e291900 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=00007ffdad150000 CR3=000000001bade000 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=00007f9d721e7f30 CR3=0000000017e5c000 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=2037323a38303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a38303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000