syzkaller login: [ 38.713519] BUG: Bad rss-counter state mm:000000009df61672 type:MM_FILEPAGES val:33 [ 38.714969] BUG: Bad rss-counter state mm:000000009df61672 type:MM_ANONPAGES val:22 [ 38.872424] ================================================================== [ 38.873375] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.874310] Read of size 8 at addr ffff88800d919968 by task sshd/218 [ 38.875071] [ 38.875290] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.876316] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.877296] Call Trace: [ 38.877610] [ 38.877892] dump_stack_lvl+0x91/0xf0 [ 38.878406] print_report+0xcc/0x620 [ 38.878892] ? __virt_addr_valid+0x102/0x340 [ 38.879454] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880060] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880733] kasan_report+0xbe/0xf0 [ 38.881218] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881833] vma_interval_tree_remove+0xc75/0xec0 [ 38.882431] vma_prepare+0xc54/0x11a0 [ 38.882903] __split_vma+0x5af/0x950 [ 38.883375] ? __pfx___split_vma+0x10/0x10 [ 38.883895] ? find_held_lock+0x2c/0x110 [ 38.884413] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.884989] ? lock_is_held_type+0x9f/0x120 [ 38.885536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.886165] ? mtree_range_walk+0x632/0x900 [ 38.886743] ? mas_walk+0x5c7/0x7c0 [ 38.887213] do_vmi_munmap+0x1f1/0x2b0 [ 38.887704] mmap_region+0x1f9/0x2660 [ 38.888200] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.888739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.889458] ? __pfx_lock_acquire+0x10/0x10 [ 38.889986] ? __pfx_mmap_region+0x10/0x10 [ 38.890513] ? security_mmap_addr+0x7d/0xa0 [ 38.891043] ? get_unmapped_area+0x1f5/0x3f0 [ 38.891590] do_mmap+0x854/0xf00 [ 38.892022] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.892508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.893080] ksys_mmap_pgoff+0x3af/0x500 [ 38.893586] do_syscall_64+0x3f/0x90 [ 38.894059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.894709] RIP: 0033:0x7f7d8cfe1d82 [ 38.895158] 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 [ 38.897260] RSP: 002b:00007ffee7158b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.898158] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d8cfe1d82 [ 38.899000] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d8c41b000 [ 38.899839] RBP: 00007f7d8c41b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.900685] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571a1458f70 [ 38.901515] R13: 00007ffee7158b30 R14: 00007ffee7158b60 R15: 00007ffee7158ec0 [ 38.902370] [ 38.902661] [ 38.902877] Allocated by task 211: [ 38.903307] kasan_save_stack+0x22/0x50 [ 38.903811] kasan_set_track+0x25/0x30 [ 38.904307] __kasan_slab_alloc+0x59/0x70 [ 38.904851] kmem_cache_alloc+0x16b/0x370 [ 38.905376] vm_area_dup+0x20/0x160 [ 38.905826] __split_vma+0x170/0x950 [ 38.906285] split_vma+0xc6/0x110 [ 38.906718] mprotect_fixup+0x8d2/0xb30 [ 38.907214] do_mprotect_pkey+0x87e/0xd40 [ 38.907733] __x64_sys_mprotect+0x78/0xc0 [ 38.908255] do_syscall_64+0x3f/0x90 [ 38.908731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.909378] [ 38.909589] Freed by task 211: [ 38.909984] kasan_save_stack+0x22/0x50 [ 38.910484] kasan_set_track+0x25/0x30 [ 38.910970] kasan_save_free_info+0x2b/0x50 [ 38.911494] __kasan_slab_free+0x10a/0x190 [ 38.912020] kmem_cache_free+0x10d/0x4d0 [ 38.912525] rcu_core+0x8c8/0x2860 [ 38.912977] __do_softirq+0x1b7/0x7d4 [ 38.913448] [ 38.913659] Last potentially related work creation: [ 38.914234] kasan_save_stack+0x22/0x50 [ 38.914725] __kasan_record_aux_stack+0x8e/0xa0 [ 38.915283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.915915] remove_vma+0x139/0x170 [ 38.916353] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.917001] do_vmi_munmap+0x1f1/0x2b0 [ 38.917484] __vm_munmap+0x138/0x3a0 [ 38.917938] __x64_sys_munmap+0x59/0x80 [ 38.918429] do_syscall_64+0x3f/0x90 [ 38.918897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919525] [ 38.919737] Second to last potentially related work creation: [ 38.920404] kasan_save_stack+0x22/0x50 [ 38.920922] __kasan_record_aux_stack+0x8e/0xa0 [ 38.921486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.922121] remove_vma+0x139/0x170 [ 38.922568] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.923117] do_vmi_munmap+0x1f1/0x2b0 [ 38.923594] mmap_region+0x1f9/0x2660 [ 38.924061] do_mmap+0x854/0xf00 [ 38.924496] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.924987] ksys_mmap_pgoff+0x7d/0x500 [ 38.925474] do_syscall_64+0x3f/0x90 [ 38.925938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926582] [ 38.926792] The buggy address belongs to the object at ffff88800d919910 [ 38.926792] which belongs to the cache vm_area_struct of size 168 [ 38.928218] The buggy address is located 88 bytes inside of [ 38.928218] freed 168-byte region [ffff88800d919910, ffff88800d9199b8) [ 38.929589] [ 38.929803] The buggy address belongs to the physical page: [ 38.930446] page:000000003328d3d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd919 [ 38.931503] memcg:ffff88800eb22d01 [ 38.931922] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.932623] page_type: 0xffffffff() [ 38.933076] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.933974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb22d01 [ 38.934862] page dumped because: kasan: bad access detected [ 38.935506] [ 38.935720] Memory state around the buggy address: [ 38.936304] ffff88800d919800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.937196] ffff88800d919880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.938048] >ffff88800d919900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.938891] ^ [ 38.939665] ffff88800d919980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.940513] ffff88800d919a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.941351] ================================================================== [ 38.942253] Disabling lock debugging due to kernel taint [ 41.465095] BUG: Bad rss-counter state mm:00000000c0831836 type:MM_FILEPAGES val:33 [ 41.465845] BUG: Bad rss-counter state mm:00000000c0831836 type:MM_ANONPAGES val:22 [ 41.834444] BUG: Bad rss-counter state mm:00000000bf9825f2 type:MM_FILEPAGES val:33 [ 41.835182] BUG: Bad rss-counter state mm:00000000bf9825f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51354' (ECDSA) to the list of known hosts. 2023/06/21 06:40:19 fuzzer started 2023/06/21 06:40:19 dialing manager at localhost:36067 2023/06/21 06:40:19 checking machine... 2023/06/21 06:40:19 checking revisions... [ 42.384773] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:40:20 testing simple program... [ 42.433980] cgroup: Unknown subsys name 'net' [ 42.529111] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:40:19 Registers: info registers vcpu 0 RAX=ffffffff83641088 RBX=ffffffff85fa57f4 RCX=ffffffff83641156 RDX=0000000000000000 RSI=ffffffff863b4250 RDI=ffffffff85fa57f4 RBP=ffffffff85fa57f8 RSP=ffff88800d9b71d0 R8 =ffffffff863b4250 R9 =ffff88800d9b72c8 R10=0000000000038001 R11=000000000008ab8c R12=ffffffff85fa57f4 R13=ffffffff85fa57f4 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcab RFL=00000256 [---ZAP-] 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 00007f9092426900 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=00007f34382c4650 CR3=000000000cb3e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=66c5a04268f8168400000000000ae988 XMM05=574b9fcedcf0d5b70000000000134858 XMM06=bdf2e299e47b49d500000000001332d8 XMM07=fb795ef6d65770560000000000122548 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000009 RBX=000000001b93a750 RCX=ffff88806c5d3a80 RDX=000000000000000e RSI=ffffffff8451f7bb RDI=00000000a306abcc RBP=ffff88800c5bf160 RSP=ffff8880166d7958 R8 =0000000024f83cc3 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff8880166d79c0 R15=000000000000000e RIP=ffffffff822704fc RFL=00000206 [-----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 00007f3437d0f900 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=00007ffe47193bd8 CR3=000000001c98a000 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=00007fb2885e8510000055d09248f790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000