syzkaller login: [ 30.612612] BUG: Bad rss-counter state mm:00000000a23cef3e type:MM_FILEPAGES val:33 [ 30.614048] BUG: Bad rss-counter state mm:00000000a23cef3e type:MM_ANONPAGES val:22 [ 30.766974] ================================================================== [ 30.768049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.769156] Read of size 8 at addr ffff888015a335c8 by task sshd/220 [ 30.770143] [ 30.770366] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.771256] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.772255] Call Trace: [ 30.772580] [ 30.772871] dump_stack_lvl+0x91/0xf0 [ 30.773365] print_report+0xcc/0x620 [ 30.773854] ? __virt_addr_valid+0x102/0x340 [ 30.774420] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775055] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775679] kasan_report+0xbe/0xf0 [ 30.776163] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.776790] vma_interval_tree_remove+0xc75/0xec0 [ 30.777396] vma_prepare+0xc54/0x11a0 [ 30.777879] __split_vma+0x5af/0x950 [ 30.778363] ? __pfx___split_vma+0x10/0x10 [ 30.778916] ? find_held_lock+0x2c/0x110 [ 30.779450] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.780018] ? lock_is_held_type+0x9f/0x120 [ 30.780567] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.781175] ? mtree_range_walk+0x632/0x900 [ 30.781731] ? mas_walk+0x5c7/0x7c0 [ 30.782207] do_vmi_munmap+0x1f1/0x2b0 [ 30.782701] mmap_region+0x1f9/0x2660 [ 30.783205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.783718] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.784429] ? __pfx_lock_acquire+0x10/0x10 [ 30.784973] ? __pfx_mmap_region+0x10/0x10 [ 30.785504] ? security_mmap_addr+0x7d/0xa0 [ 30.786044] ? get_unmapped_area+0x1f5/0x3f0 [ 30.786605] do_mmap+0x854/0xf00 [ 30.787071] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.787574] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.788148] ksys_mmap_pgoff+0x3af/0x500 [ 30.788659] do_syscall_64+0x3f/0x90 [ 30.789149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.789816] RIP: 0033:0x7f2023dd8d82 [ 30.790285] 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 [ 30.792441] RSP: 002b:00007ffc89084c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.793366] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2023dd8d82 [ 30.794222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2023212000 [ 30.795087] RBP: 00007f2023212000 R08: 0000000000000009 R09: 0000000000001000 [ 30.795932] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fb4791d90 [ 30.796778] R13: 00007ffc89084cb0 R14: 00007ffc89084ce0 R15: 00007ffc89085040 [ 30.797628] [ 30.797922] [ 30.798144] Allocated by task 213: [ 30.798574] kasan_save_stack+0x22/0x50 [ 30.799092] kasan_set_track+0x25/0x30 [ 30.799590] __kasan_slab_alloc+0x59/0x70 [ 30.800116] kmem_cache_alloc+0x16b/0x370 [ 30.800639] vm_area_dup+0x20/0x160 [ 30.801124] __split_vma+0x170/0x950 [ 30.801605] split_vma+0xc6/0x110 [ 30.802052] mprotect_fixup+0x8d2/0xb30 [ 30.802557] do_mprotect_pkey+0x87e/0xd40 [ 30.803093] __x64_sys_mprotect+0x78/0xc0 [ 30.803620] do_syscall_64+0x3f/0x90 [ 30.804095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.804750] [ 30.804964] Freed by task 13: [ 30.805350] kasan_save_stack+0x22/0x50 [ 30.805854] kasan_set_track+0x25/0x30 [ 30.806348] kasan_save_free_info+0x2b/0x50 [ 30.806897] __kasan_slab_free+0x10a/0x190 [ 30.807435] kmem_cache_free+0x10d/0x4d0 [ 30.807947] rcu_core+0x8c8/0x2860 [ 30.808393] __do_softirq+0x1b7/0x7d4 [ 30.808879] [ 30.809098] Last potentially related work creation: [ 30.809692] kasan_save_stack+0x22/0x50 [ 30.810207] __kasan_record_aux_stack+0x8e/0xa0 [ 30.810789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.811446] remove_vma+0x139/0x170 [ 30.811899] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.812461] do_vmi_munmap+0x1f1/0x2b0 [ 30.812952] __vm_munmap+0x138/0x3a0 [ 30.813436] __x64_sys_munmap+0x59/0x80 [ 30.813946] do_syscall_64+0x3f/0x90 [ 30.814425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815089] [ 30.815308] The buggy address belongs to the object at ffff888015a33570 [ 30.815308] which belongs to the cache vm_area_struct of size 168 [ 30.816776] The buggy address is located 88 bytes inside of [ 30.816776] freed 168-byte region [ffff888015a33570, ffff888015a33618) [ 30.818189] [ 30.818408] The buggy address belongs to the physical page: [ 30.819076] page:000000009c067e9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a33 [ 30.820171] memcg:ffff888019ccc201 [ 30.820594] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.821236] page_type: 0xffffffff() [ 30.821687] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.822601] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ccc201 [ 30.823522] page dumped because: kasan: bad access detected [ 30.824188] [ 30.824405] Memory state around the buggy address: [ 30.824984] ffff888015a33480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.825836] ffff888015a33500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.826723] >ffff888015a33580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.827607] ^ [ 30.828281] ffff888015a33600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.829130] ffff888015a33680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.829974] ================================================================== [ 30.831317] Disabling lock debugging due to kernel taint [ 32.873672] BUG: Bad rss-counter state mm:00000000b984dd83 type:MM_FILEPAGES val:33 [ 32.874884] BUG: Bad rss-counter state mm:00000000b984dd83 type:MM_ANONPAGES val:22 [ 33.365454] BUG: Bad rss-counter state mm:00000000e5bf9f48 type:MM_FILEPAGES val:33 [ 33.366752] BUG: Bad rss-counter state mm:00000000e5bf9f48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54719' (ECDSA) to the list of known hosts. 2023/06/20 15:33:31 fuzzer started 2023/06/20 15:33:31 dialing manager at localhost:36067 2023/06/20 15:33:31 checking machine... 2023/06/20 15:33:31 checking revisions... [ 34.005265] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:33:31 testing simple program... [ 34.048695] cgroup: Unknown subsys name 'net' [ 34.105238] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:33:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008eb9a00 RCX=ffffffff838699fe RDX=ffff8880158b9b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019cffc48 RSP=ffff888019cffb20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888008fe8158 R13=00000000000000e5 R14=ffff888008fe8000 R15=ffff888008eb9a00 RIP=ffffffff814c0860 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 00007f8a632c6900 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=00007f8a6387d618 CR3=00000000100da000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fe5fe4823e0 CR3=000000000c650000 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=04b20aa030112a8b664f19a236a730f8 XMM02=ec2efd57dc4c00df000000000011a3e8 XMM03=52b7de09aab03f26000000000011a4b8 XMM04=5f374a0d677919eb00000000000ae988 XMM05=f84bb20748d71ce500000000001325e8 XMM06=4fda316b135da52b0000000000131688 XMM07=e042d86d42eb936e0000000000121c48 XMM08=52b7de09aab03f26000000000011a4b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000