syzkaller login: [ 34.312316] BUG: Bad rss-counter state mm:000000003f257c61 type:MM_FILEPAGES val:33 [ 34.313569] BUG: Bad rss-counter state mm:000000003f257c61 type:MM_ANONPAGES val:22 [ 34.360578] ================================================================== [ 34.361746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.362980] Read of size 8 at addr ffff88801a2a7ed8 by task sshd/219 [ 34.364011] [ 34.364303] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.365458] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.366695] Call Trace: [ 34.367119] [ 34.367449] dump_stack_lvl+0x91/0xf0 [ 34.368109] print_report+0xcc/0x620 [ 34.368768] ? __virt_addr_valid+0x102/0x340 [ 34.369405] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.370236] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.370981] kasan_report+0xbe/0xf0 [ 34.371546] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.372277] vma_interval_tree_remove+0xc75/0xec0 [ 34.372989] vma_prepare+0xc54/0x11a0 [ 34.373556] __split_vma+0x5af/0x950 [ 34.374118] ? __pfx___split_vma+0x10/0x10 [ 34.374768] ? find_held_lock+0x2c/0x110 [ 34.375378] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.376047] ? lock_is_held_type+0x9f/0x120 [ 34.376679] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.377392] ? mtree_range_walk+0x632/0x900 [ 34.378059] ? mas_walk+0x5c7/0x7c0 [ 34.378629] do_vmi_munmap+0x1f1/0x2b0 [ 34.379218] mmap_region+0x1f9/0x2660 [ 34.379788] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.380391] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.381226] ? __pfx_lock_acquire+0x10/0x10 [ 34.381853] ? __pfx_mmap_region+0x10/0x10 [ 34.382482] ? security_mmap_addr+0x7d/0xa0 [ 34.383138] ? get_unmapped_area+0x1f5/0x3f0 [ 34.383796] do_mmap+0x854/0xf00 [ 34.384324] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.384918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.385582] ksys_mmap_pgoff+0x3af/0x500 [ 34.386185] do_syscall_64+0x3f/0x90 [ 34.386758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.387545] RIP: 0033:0x7f6cc3c19d82 [ 34.388089] 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 [ 34.390621] RSP: 002b:00007ffec2fbff58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.391710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cc3c19d82 [ 34.392732] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cc3053000 [ 34.393749] RBP: 00007f6cc3053000 R08: 0000000000000009 R09: 0000000000001000 [ 34.394779] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f891aae980 [ 34.395782] R13: 00007ffec2fbff70 R14: 00007ffec2fbffa0 R15: 00007ffec2fc0300 [ 34.396803] [ 34.397153] [ 34.397410] Allocated by task 212: [ 34.397926] kasan_save_stack+0x22/0x50 [ 34.398520] kasan_set_track+0x25/0x30 [ 34.399108] __kasan_slab_alloc+0x59/0x70 [ 34.399718] kmem_cache_alloc+0x16b/0x370 [ 34.400331] vm_area_dup+0x20/0x160 [ 34.400871] __split_vma+0x170/0x950 [ 34.401421] split_vma+0xc6/0x110 [ 34.401932] mprotect_fixup+0x8d2/0xb30 [ 34.402536] do_mprotect_pkey+0x87e/0xd40 [ 34.403147] __x64_sys_mprotect+0x78/0xc0 [ 34.403866] do_syscall_64+0x3f/0x90 [ 34.404425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.405169] [ 34.405417] Freed by task 212: [ 34.405879] kasan_save_stack+0x22/0x50 [ 34.406469] kasan_set_track+0x25/0x30 [ 34.407061] kasan_save_free_info+0x2b/0x50 [ 34.407686] __kasan_slab_free+0x10a/0x190 [ 34.408311] kmem_cache_free+0x10d/0x4d0 [ 34.408908] rcu_core+0x8c8/0x2860 [ 34.409430] __do_softirq+0x1b7/0x7d4 [ 34.409988] [ 34.410242] Last potentially related work creation: [ 34.410941] kasan_save_stack+0x22/0x50 [ 34.411532] __kasan_record_aux_stack+0x8e/0xa0 [ 34.412209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.412971] remove_vma+0x139/0x170 [ 34.413503] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.414152] do_vmi_munmap+0x1f1/0x2b0 [ 34.414734] __vm_munmap+0x138/0x3a0 [ 34.415287] __x64_sys_munmap+0x59/0x80 [ 34.415868] do_syscall_64+0x3f/0x90 [ 34.416429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.417188] [ 34.417440] The buggy address belongs to the object at ffff88801a2a7e80 [ 34.417440] which belongs to the cache vm_area_struct of size 168 [ 34.419179] The buggy address is located 88 bytes inside of [ 34.419179] freed 168-byte region [ffff88801a2a7e80, ffff88801a2a7f28) [ 34.420842] [ 34.421096] The buggy address belongs to the physical page: [ 34.421878] page:000000008e3690f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2a7 [ 34.423192] memcg:ffff888015f3ff01 [ 34.423694] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.424452] page_type: 0xffffffff() [ 34.424984] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.426055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015f3ff01 [ 34.427133] page dumped because: kasan: bad access detected [ 34.427904] [ 34.428153] Memory state around the buggy address: [ 34.428834] ffff88801a2a7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.429830] ffff88801a2a7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.430834] >ffff88801a2a7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.431823] ^ [ 34.432671] ffff88801a2a7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.433680] ffff88801a2a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.434706] ================================================================== [ 34.435844] Disabling lock debugging due to kernel taint [ 36.757305] BUG: Bad rss-counter state mm:00000000a85acdd0 type:MM_FILEPAGES val:33 [ 36.758488] BUG: Bad rss-counter state mm:00000000a85acdd0 type:MM_ANONPAGES val:22 [ 37.247643] BUG: Bad rss-counter state mm:000000000393736c type:MM_FILEPAGES val:33 [ 37.248801] BUG: Bad rss-counter state mm:000000000393736c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49866' (ECDSA) to the list of known hosts. 2023/06/20 00:16:18 fuzzer started 2023/06/20 00:16:18 dialing manager at localhost:44161 2023/06/20 00:16:18 checking machine... 2023/06/20 00:16:18 checking revisions... [ 37.943873] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:16:18 testing simple program... [ 37.996287] cgroup: Unknown subsys name 'net' [ 38.037869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:16:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888014648000 RSI=ffffffff818cf695 RDI=ffffffff8560b640 RBP=ffff8880160fe758 RSP=ffff88800fe97a58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff8880160fe7e8 R13=ffffffff818cf549 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff812d8604 RFL=00000293 [--S-A-C] 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 00007f936ba18900 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=00007ffc97ddf000 CR3=000000000e830000 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=0000000000000000 RBX=ffff88806cf2c240 RCX=ffffffff813fdc77 RDX=ffff888008d751c0 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888008e27e50 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff888008c58400 R12=0000000000000000 R13=0000000000000000 R14=ffff888008d751c0 R15=0000000000000000 RIP=ffffffff814c01fc 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 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=00007fa6aa1e5c90 CR3=000000000dd0e000 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=9bf0ead0f21bc3b8164bc2387462d069 XMM02=2c67c8bc2e329bc3000000000011de68 XMM03=fb795ef6d65770560000000000124808 XMM04=c12196e415bfb94700000000000ae988 XMM05=19e9129bd510f23500000000001343a8 XMM06=4a4adb6d1e1cbcaf0000000000133210 XMM07=e042d86d42eb936e0000000000124a88 XMM08=8469f498027a52c6000000000011dec8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000