syzkaller login: [ 42.500612] BUG: Bad rss-counter state mm:0000000045cad356 type:MM_FILEPAGES val:32 [ 42.501826] BUG: Bad rss-counter state mm:0000000045cad356 type:MM_ANONPAGES val:22 [ 42.538903] ================================================================== [ 42.539853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.540806] Read of size 8 at addr ffff888018201d08 by task sshd/219 [ 42.541706] [ 42.541929] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.542828] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.543820] Call Trace: [ 42.544149] [ 42.544435] dump_stack_lvl+0x91/0xf0 [ 42.544932] print_report+0xcc/0x620 [ 42.545430] ? __virt_addr_valid+0x102/0x340 [ 42.545990] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.546635] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.547267] kasan_report+0xbe/0xf0 [ 42.547758] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.548391] vma_interval_tree_remove+0xc75/0xec0 [ 42.549015] vma_prepare+0xc54/0x11a0 [ 42.549510] __split_vma+0x5af/0x950 [ 42.549994] ? __pfx___split_vma+0x10/0x10 [ 42.550542] ? find_held_lock+0x2c/0x110 [ 42.551081] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.551660] ? lock_is_held_type+0x9f/0x120 [ 42.552220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.552840] ? mtree_range_walk+0x632/0x900 [ 42.553404] ? mas_walk+0x5c7/0x7c0 [ 42.553894] do_vmi_munmap+0x1f1/0x2b0 [ 42.554416] mmap_region+0x1f9/0x2660 [ 42.554912] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.555433] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.556163] ? __pfx_lock_acquire+0x10/0x10 [ 42.556709] ? __pfx_mmap_region+0x10/0x10 [ 42.557255] ? security_mmap_addr+0x7d/0xa0 [ 42.557799] ? get_unmapped_area+0x1f5/0x3f0 [ 42.558373] do_mmap+0x854/0xf00 [ 42.558816] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.559317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.559890] ksys_mmap_pgoff+0x3af/0x500 [ 42.560407] do_syscall_64+0x3f/0x90 [ 42.560891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.561556] RIP: 0033:0x7f1d04178d82 [ 42.562028] 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 [ 42.564225] RSP: 002b:00007ffd5578a8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.565150] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d04178d82 [ 42.566012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d035b2000 [ 42.566884] RBP: 00007f1d035b2000 R08: 0000000000000009 R09: 0000000000001000 [ 42.567750] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ee9dabeb20 [ 42.568609] R13: 00007ffd5578a8d0 R14: 00007ffd5578a900 R15: 00007ffd5578ac60 [ 42.569482] [ 42.569784] [ 42.570002] Allocated by task 212: [ 42.570450] kasan_save_stack+0x22/0x50 [ 42.570961] kasan_set_track+0x25/0x30 [ 42.571469] __kasan_slab_alloc+0x59/0x70 [ 42.572003] kmem_cache_alloc+0x16b/0x370 [ 42.572526] vm_area_dup+0x20/0x160 [ 42.572988] __split_vma+0x170/0x950 [ 42.573471] split_vma+0xc6/0x110 [ 42.573918] mprotect_fixup+0x8d2/0xb30 [ 42.574445] do_mprotect_pkey+0x87e/0xd40 [ 42.574980] __x64_sys_mprotect+0x78/0xc0 [ 42.575512] do_syscall_64+0x3f/0x90 [ 42.576000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.576648] [ 42.576866] Freed by task 212: [ 42.577271] kasan_save_stack+0x22/0x50 [ 42.577792] kasan_set_track+0x25/0x30 [ 42.578307] kasan_save_free_info+0x2b/0x50 [ 42.578851] __kasan_slab_free+0x10a/0x190 [ 42.579405] kmem_cache_free+0x10d/0x4d0 [ 42.579932] rcu_core+0x8c8/0x2860 [ 42.580391] __do_softirq+0x1b7/0x7d4 [ 42.580879] [ 42.581097] Last potentially related work creation: [ 42.581702] kasan_save_stack+0x22/0x50 [ 42.582236] __kasan_record_aux_stack+0x8e/0xa0 [ 42.582827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.583480] remove_vma+0x139/0x170 [ 42.583957] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.584531] do_vmi_munmap+0x1f1/0x2b0 [ 42.585036] __vm_munmap+0x138/0x3a0 [ 42.585514] __x64_sys_munmap+0x59/0x80 [ 42.586024] do_syscall_64+0x3f/0x90 [ 42.586512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.587171] [ 42.587390] The buggy address belongs to the object at ffff888018201cb0 [ 42.587390] which belongs to the cache vm_area_struct of size 168 [ 42.588896] The buggy address is located 88 bytes inside of [ 42.588896] freed 168-byte region [ffff888018201cb0, ffff888018201d58) [ 42.590352] [ 42.590573] The buggy address belongs to the physical page: [ 42.591255] page:000000007d1b28ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18201 [ 42.592374] memcg:ffff88801a4f1401 [ 42.592807] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.593461] page_type: 0xffffffff() [ 42.593922] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.594871] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a4f1401 [ 42.595768] page dumped because: kasan: bad access detected [ 42.596426] [ 42.596641] Memory state around the buggy address: [ 42.597227] ffff888018201c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 42.598085] ffff888018201c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 42.598947] >ffff888018201d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 42.599813] ^ [ 42.600249] ffff888018201d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.601112] ffff888018201e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.601966] ================================================================== [ 42.603061] Disabling lock debugging due to kernel taint [ 44.529749] BUG: Bad rss-counter state mm:000000006887eb09 type:MM_FILEPAGES val:33 [ 44.530774] BUG: Bad rss-counter state mm:000000006887eb09 type:MM_ANONPAGES val:22 [ 45.089892] BUG: Bad rss-counter state mm:000000001bce369f type:MM_FILEPAGES val:33 [ 45.091061] BUG: Bad rss-counter state mm:000000001bce369f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33850' (ECDSA) to the list of known hosts. 2023/06/20 03:32:04 fuzzer started 2023/06/20 03:32:04 dialing manager at localhost:44161 2023/06/20 03:32:04 checking machine... 2023/06/20 03:32:04 checking revisions... [ 45.718748] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:32:05 testing simple program... [ 45.767236] cgroup: Unknown subsys name 'net' [ 45.802755] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:31:52 Registers: info registers vcpu 0 RAX=ffffffff864efd60 RBX=0000000000000001 RCX=ffffffff8120674e RDX=0000000000002068 RSI=0000000000002067 RDI=ffffffff864efd60 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =0000000000000000 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000009bea R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f9b9 R15=ffff888008d7f978 RIP=ffffffff811307e6 RFL=00000216 [----AP-] 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 0000000000000000 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=00007f2ab9f2efc0 CR3=000000000f950000 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=2034303a32333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a32333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000028 RCX=ffffffff8449f02b RDX=ffff888016b09b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88800e439608 RSP=ffff888018f57ce0 R8 =0000000000000006 R9 =00007f797a83231c R10=00007f797a431fff R11=0000000000000000 R12=0000000000000004 R13=0000000000000008 R14=00007f797a83231c R15=00007f797a431fff RIP=ffffffff814c07eb RFL=00000216 [----AP-] 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 00007f7979cc0900 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=00007f797a83231c CR3=000000000eb14000 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=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