syzkaller login: [ 31.468964] BUG: Bad rss-counter state mm:0000000035a1278e type:MM_FILEPAGES val:33 [ 31.470198] BUG: Bad rss-counter state mm:0000000035a1278e type:MM_ANONPAGES val:22 [ 31.511787] ================================================================== [ 31.513052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.514443] Read of size 8 at addr ffff88800dc834e0 by task sshd/220 [ 31.515458] [ 31.515735] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.516932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.518149] Call Trace: [ 31.518514] [ 31.518871] dump_stack_lvl+0x91/0xf0 [ 31.519488] print_report+0xcc/0x620 [ 31.520163] ? __virt_addr_valid+0x102/0x340 [ 31.520836] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.521693] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.522474] kasan_report+0xbe/0xf0 [ 31.523067] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.523836] vma_interval_tree_remove+0xc75/0xec0 [ 31.524579] vma_prepare+0xc54/0x11a0 [ 31.525169] __split_vma+0x5af/0x950 [ 31.525750] ? __pfx___split_vma+0x10/0x10 [ 31.526420] ? find_held_lock+0x2c/0x110 [ 31.527065] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.527762] ? lock_is_held_type+0x9f/0x120 [ 31.528433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.529181] ? mtree_range_walk+0x632/0x900 [ 31.529894] ? mas_walk+0x5c7/0x7c0 [ 31.530475] do_vmi_munmap+0x1f1/0x2b0 [ 31.531025] mmap_region+0x1f9/0x2660 [ 31.531564] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.532130] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.532924] ? __pfx_lock_acquire+0x10/0x10 [ 31.533520] ? __pfx_mmap_region+0x10/0x10 [ 31.534121] ? security_mmap_addr+0x7d/0xa0 [ 31.534720] ? get_unmapped_area+0x1f5/0x3f0 [ 31.535332] do_mmap+0x854/0xf00 [ 31.535822] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.536376] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.537008] ksys_mmap_pgoff+0x3af/0x500 [ 31.537584] do_syscall_64+0x3f/0x90 [ 31.538122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.538844] RIP: 0033:0x7f3466614d82 [ 31.539350] 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 [ 31.541719] RSP: 002b:00007ffc66cc0848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.542747] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3466614d82 [ 31.543696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3465a4e000 [ 31.544643] RBP: 00007f3465a4e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.545577] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643ede97ec0 [ 31.546519] R13: 00007ffc66cc0860 R14: 00007ffc66cc0890 R15: 00007ffc66cc0bf0 [ 31.547482] [ 31.547810] [ 31.548046] Allocated by task 213: [ 31.548527] kasan_save_stack+0x22/0x50 [ 31.549087] kasan_set_track+0x25/0x30 [ 31.549642] __kasan_slab_alloc+0x59/0x70 [ 31.550229] kmem_cache_alloc+0x16b/0x370 [ 31.550796] vm_area_dup+0x20/0x160 [ 31.551307] __split_vma+0x170/0x950 [ 31.551827] split_vma+0xc6/0x110 [ 31.552317] mprotect_fixup+0x8d2/0xb30 [ 31.552877] do_mprotect_pkey+0x87e/0xd40 [ 31.553463] __x64_sys_mprotect+0x78/0xc0 [ 31.554054] do_syscall_64+0x3f/0x90 [ 31.554580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.555330] [ 31.555572] Freed by task 213: [ 31.556012] kasan_save_stack+0x22/0x50 [ 31.556577] kasan_set_track+0x25/0x30 [ 31.557128] kasan_save_free_info+0x2b/0x50 [ 31.557725] __kasan_slab_free+0x10a/0x190 [ 31.558324] kmem_cache_free+0x10d/0x4d0 [ 31.558889] rcu_core+0x8c8/0x2860 [ 31.559378] __do_softirq+0x1b7/0x7d4 [ 31.559905] [ 31.560146] Last potentially related work creation: [ 31.560797] kasan_save_stack+0x22/0x50 [ 31.561353] __kasan_record_aux_stack+0x8e/0xa0 [ 31.562000] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.562716] remove_vma+0x139/0x170 [ 31.563212] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.563831] do_vmi_munmap+0x1f1/0x2b0 [ 31.564373] __vm_munmap+0x138/0x3a0 [ 31.564894] __x64_sys_munmap+0x59/0x80 [ 31.565449] do_syscall_64+0x3f/0x90 [ 31.565988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.566699] [ 31.566941] The buggy address belongs to the object at ffff88800dc83488 [ 31.566941] which belongs to the cache vm_area_struct of size 168 [ 31.568571] The buggy address is located 88 bytes inside of [ 31.568571] freed 168-byte region [ffff88800dc83488, ffff88800dc83530) [ 31.570152] [ 31.570390] The buggy address belongs to the physical page: [ 31.571127] page:00000000adba83de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc83 [ 31.572327] memcg:ffff88800e936b01 [ 31.572803] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.573513] page_type: 0xffffffff() [ 31.574018] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.575040] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e936b01 [ 31.576049] page dumped because: kasan: bad access detected [ 31.576787] [ 31.577028] Memory state around the buggy address: [ 31.577676] ffff88800dc83380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.578637] ffff88800dc83400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.579597] >ffff88800dc83480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.580541] ^ [ 31.581374] ffff88800dc83500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.582330] ffff88800dc83580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.583278] ================================================================== [ 31.584412] Disabling lock debugging due to kernel taint [ 34.062284] BUG: Bad rss-counter state mm:000000003c38f336 type:MM_FILEPAGES val:33 [ 34.063454] BUG: Bad rss-counter state mm:000000003c38f336 type:MM_ANONPAGES val:22 [ 34.433534] BUG: Bad rss-counter state mm:0000000056239d75 type:MM_FILEPAGES val:33 [ 34.434577] BUG: Bad rss-counter state mm:0000000056239d75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63944' (ECDSA) to the list of known hosts. 2023/06/20 18:35:21 fuzzer started 2023/06/20 18:35:21 dialing manager at localhost:36067 2023/06/20 18:35:21 checking machine... 2023/06/20 18:35:21 checking revisions... [ 35.151181] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:35:21 testing simple program... [ 35.201381] cgroup: Unknown subsys name 'net' [ 35.256897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:35:21 Registers: info registers vcpu 0 RAX=0000000000091afa RBX=0000000000000001 RCX=ffffffff83868345 RDX=0000000000091afa RSI=0000000000028683 RDI=ffffffff8658b400 RBP=ffff8880195173e0 RSP=ffff888019517318 R8 =0000000000000000 R9 =ffff8880195173c8 R10=0000000000038001 R11=0000000000091afa R12=ffff8880195173e8 R13=ffff8880195173d0 R14=ffff8880195173c9 R15=ffff888019517388 RIP=ffffffff81130837 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 00007fd8b2e84900 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=00007fd8b343b618 CR3=000000000d794000 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=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 info registers vcpu 1 RAX=ffffc90000660000 RBX=ffff88800f420b80 RCX=1ffff11001e84242 RDX=1ffff11001e841b6 RSI=0000000000000004 RDI=ffff88800f421210 RBP=1ffff11001e93f76 RSP=ffff88800f49fb38 R8 =0000000000000001 R9 =ffffed1001e93f55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800f420d98 R13=0000000000000001 R14=ffff88800f420000 R15=ffff88800f420b80 RIP=ffffffff8302b66b RFL=00000006 [-----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 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=00007f51f038b930 CR3=000000000cc16000 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=6e7d61ed0acd59836448585f26600c7a XMM02=000000000011a4a0eff9b2d0a8fce9cb XMM03=000000000011a5702c67c8bc2e329bc3 XMM04=937376a68aab2cf300000000000ae988 XMM05=19e9129bd510f2350000000000131900 XMM06=bcae0d30d309543c0000000000130768 XMM07=e042d86d42eb936e0000000000121d08 XMM08=8ece88603d621609000000000011a570 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000