syzkaller login: [ 62.387583] BUG: Bad rss-counter state mm:000000005e69c85d type:MM_FILEPAGES val:33 [ 62.388667] BUG: Bad rss-counter state mm:000000005e69c85d type:MM_ANONPAGES val:22 [ 62.563738] ================================================================== [ 62.564695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.565680] Read of size 8 at addr ffff88801ac36c20 by task sshd/219 [ 62.566596] [ 62.566840] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.567748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.568769] Call Trace: [ 62.569102] [ 62.569399] dump_stack_lvl+0x91/0xf0 [ 62.569915] print_report+0xcc/0x620 [ 62.570419] ? __virt_addr_valid+0x102/0x340 [ 62.571013] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.571661] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.572312] kasan_report+0xbe/0xf0 [ 62.572814] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.573465] vma_interval_tree_remove+0xc75/0xec0 [ 62.574097] vma_prepare+0xc54/0x11a0 [ 62.574597] __split_vma+0x5af/0x950 [ 62.575125] ? __pfx___split_vma+0x10/0x10 [ 62.575684] ? find_held_lock+0x2c/0x110 [ 62.576230] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.576824] ? lock_is_held_type+0x9f/0x120 [ 62.577389] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.578019] ? mtree_range_walk+0x632/0x900 [ 62.578598] ? mas_walk+0x5c7/0x7c0 [ 62.579115] do_vmi_munmap+0x1f1/0x2b0 [ 62.579634] mmap_region+0x1f9/0x2660 [ 62.580143] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.580683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.581429] ? __pfx_lock_acquire+0x10/0x10 [ 62.581992] ? __pfx_mmap_region+0x10/0x10 [ 62.582547] ? security_mmap_addr+0x7d/0xa0 [ 62.583124] ? get_unmapped_area+0x1f5/0x3f0 [ 62.583702] do_mmap+0x854/0xf00 [ 62.584163] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.584679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.585268] ksys_mmap_pgoff+0x3af/0x500 [ 62.585805] do_syscall_64+0x3f/0x90 [ 62.586306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.586996] RIP: 0033:0x7fd934752d82 [ 62.587474] 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 [ 62.589694] RSP: 002b:00007fff6367f198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.590639] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd934752d82 [ 62.591618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd933b8c000 [ 62.592583] RBP: 00007fd933b8c000 R08: 0000000000000009 R09: 0000000000001000 [ 62.593546] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558811be7ec0 [ 62.594505] R13: 00007fff6367f1b0 R14: 00007fff6367f1e0 R15: 00007fff6367f540 [ 62.595503] [ 62.595832] [ 62.596078] Allocated by task 212: [ 62.596561] kasan_save_stack+0x22/0x50 [ 62.597142] kasan_set_track+0x25/0x30 [ 62.597705] __kasan_slab_alloc+0x59/0x70 [ 62.598295] kmem_cache_alloc+0x16b/0x370 [ 62.598900] vm_area_dup+0x20/0x160 [ 62.599409] __split_vma+0x170/0x950 [ 62.599921] split_vma+0xc6/0x110 [ 62.600407] mprotect_fixup+0x8d2/0xb30 [ 62.600957] do_mprotect_pkey+0x87e/0xd40 [ 62.601536] __x64_sys_mprotect+0x78/0xc0 [ 62.602101] do_syscall_64+0x3f/0x90 [ 62.602619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.603348] [ 62.603587] Freed by task 212: [ 62.604021] kasan_save_stack+0x22/0x50 [ 62.604578] kasan_set_track+0x25/0x30 [ 62.605120] kasan_save_free_info+0x2b/0x50 [ 62.605705] __kasan_slab_free+0x10a/0x190 [ 62.606289] kmem_cache_free+0x10d/0x4d0 [ 62.606865] rcu_core+0x8c8/0x2860 [ 62.607353] __do_softirq+0x1b7/0x7d4 [ 62.607886] [ 62.608123] Last potentially related work creation: [ 62.608772] kasan_save_stack+0x22/0x50 [ 62.609325] __kasan_record_aux_stack+0x8e/0xa0 [ 62.609961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.610674] remove_vma+0x139/0x170 [ 62.611184] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.611802] do_vmi_munmap+0x1f1/0x2b0 [ 62.612339] __vm_munmap+0x138/0x3a0 [ 62.612864] __x64_sys_munmap+0x59/0x80 [ 62.613414] do_syscall_64+0x3f/0x90 [ 62.613942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.614650] [ 62.614903] The buggy address belongs to the object at ffff88801ac36bc8 [ 62.614903] which belongs to the cache vm_area_struct of size 168 [ 62.616539] The buggy address is located 88 bytes inside of [ 62.616539] freed 168-byte region [ffff88801ac36bc8, ffff88801ac36c70) [ 62.618092] [ 62.618330] The buggy address belongs to the physical page: [ 62.619070] page:000000002f464659 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ac36 [ 62.620281] memcg:ffff888018e5ff01 [ 62.620735] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.621425] page_type: 0xffffffff() [ 62.621911] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.622911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e5ff01 [ 62.623888] page dumped because: kasan: bad access detected [ 62.624615] [ 62.624854] Memory state around the buggy address: [ 62.625493] ffff88801ac36b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.626440] ffff88801ac36b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 62.627402] >ffff88801ac36c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 62.628338] ^ [ 62.628930] ffff88801ac36c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 62.629890] ffff88801ac36d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 62.630862] ================================================================== [ 62.631989] Disabling lock debugging due to kernel taint [ 64.623230] BUG: Bad rss-counter state mm:00000000550f28fe type:MM_FILEPAGES val:33 [ 64.624204] BUG: Bad rss-counter state mm:00000000550f28fe type:MM_ANONPAGES val:22 [ 65.090705] BUG: Bad rss-counter state mm:00000000dbf6963f type:MM_FILEPAGES val:33 [ 65.091919] BUG: Bad rss-counter state mm:00000000dbf6963f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43469' (ECDSA) to the list of known hosts. 2023/06/19 15:08:38 fuzzer started 2023/06/19 15:08:38 dialing manager at localhost:44161 2023/06/19 15:08:38 checking machine... 2023/06/19 15:08:38 checking revisions... [ 65.815475] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:08:38 testing simple program... [ 65.855448] cgroup: Unknown subsys name 'net' [ 65.915755] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:08:36 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800f027bb0 RCX=ffff88800f027b00 RDX=0000000000000042 RSI=ffff88800c9a11b8 RDI=ffff88800c9a1000 RBP=ffff88800c9a1000 RSP=ffff88800f0279f0 R8 =ffff88800f027bb0 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800c9a11b8 R14=0000000000000042 R15=0000000000000042 RIP=ffffffff814c07eb 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 00007fa41fa44900 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=00007ffc9fe34000 CR3=000000000ca16000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f4a7e2b8f50 CR3=000000001649c000 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=2037333a38303a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a38303a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000