syzkaller login: [ 60.329547] BUG: Bad rss-counter state mm:0000000030ef7306 type:MM_FILEPAGES val:33 [ 60.330589] BUG: Bad rss-counter state mm:0000000030ef7306 type:MM_ANONPAGES val:22 [ 60.489734] ================================================================== [ 60.490837] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.491977] Read of size 8 at addr ffff88800faa33f8 by task sshd/221 [ 60.493060] [ 60.493297] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.494178] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.495205] Call Trace: [ 60.495530] [ 60.495829] dump_stack_lvl+0x91/0xf0 [ 60.496333] print_report+0xcc/0x620 [ 60.496843] ? __virt_addr_valid+0x102/0x340 [ 60.497410] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.498040] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.498671] kasan_report+0xbe/0xf0 [ 60.499159] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.499789] vma_interval_tree_remove+0xc75/0xec0 [ 60.500414] vma_prepare+0xc54/0x11a0 [ 60.500904] __split_vma+0x5af/0x950 [ 60.501384] ? __pfx___split_vma+0x10/0x10 [ 60.501927] ? find_held_lock+0x2c/0x110 [ 60.502460] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.503042] ? lock_is_held_type+0x9f/0x120 [ 60.503589] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.504208] ? mtree_range_walk+0x632/0x900 [ 60.504790] ? mas_walk+0x5c7/0x7c0 [ 60.505272] do_vmi_munmap+0x1f1/0x2b0 [ 60.505781] mmap_region+0x1f9/0x2660 [ 60.506267] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.506791] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.507528] ? __pfx_lock_acquire+0x10/0x10 [ 60.508069] ? __pfx_mmap_region+0x10/0x10 [ 60.508617] ? security_mmap_addr+0x7d/0xa0 [ 60.509159] ? get_unmapped_area+0x1f5/0x3f0 [ 60.509713] do_mmap+0x854/0xf00 [ 60.510164] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.510668] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.511252] ksys_mmap_pgoff+0x3af/0x500 [ 60.511771] do_syscall_64+0x3f/0x90 [ 60.512256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.512932] RIP: 0033:0x7f05ba877d82 [ 60.513392] 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 [ 60.515563] RSP: 002b:00007fff5f34f3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.516509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05ba877d82 [ 60.517376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05b9cb1000 [ 60.518244] RBP: 00007f05b9cb1000 R08: 0000000000000009 R09: 0000000000001000 [ 60.519107] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb372ecec0 [ 60.519976] R13: 00007fff5f34f400 R14: 00007fff5f34f430 R15: 00007fff5f34f790 [ 60.520863] [ 60.521162] [ 60.521379] Allocated by task 214: [ 60.521817] kasan_save_stack+0x22/0x50 [ 60.522335] kasan_set_track+0x25/0x30 [ 60.522845] __kasan_slab_alloc+0x59/0x70 [ 60.523386] kmem_cache_alloc+0x16b/0x370 [ 60.523914] vm_area_dup+0x20/0x160 [ 60.524409] __split_vma+0x170/0x950 [ 60.524881] split_vma+0xc6/0x110 [ 60.525329] mprotect_fixup+0x8d2/0xb30 [ 60.525841] do_mprotect_pkey+0x87e/0xd40 [ 60.526377] __x64_sys_mprotect+0x78/0xc0 [ 60.526914] do_syscall_64+0x3f/0x90 [ 60.527400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.528060] [ 60.528283] Freed by task 211: [ 60.528705] kasan_save_stack+0x22/0x50 [ 60.529215] kasan_set_track+0x25/0x30 [ 60.529726] kasan_save_free_info+0x2b/0x50 [ 60.530275] __kasan_slab_free+0x10a/0x190 [ 60.530822] kmem_cache_free+0x10d/0x4d0 [ 60.531342] rcu_core+0x8c8/0x2860 [ 60.531797] __do_softirq+0x1b7/0x7d4 [ 60.532292] [ 60.532517] Last potentially related work creation: [ 60.533167] kasan_save_stack+0x22/0x50 [ 60.533680] __kasan_record_aux_stack+0x8e/0xa0 [ 60.534261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.534914] remove_vma+0x139/0x170 [ 60.535373] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.535942] do_vmi_munmap+0x1f1/0x2b0 [ 60.536482] __vm_munmap+0x138/0x3a0 [ 60.536956] __x64_sys_munmap+0x59/0x80 [ 60.537464] do_syscall_64+0x3f/0x90 [ 60.537947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.538601] [ 60.538820] The buggy address belongs to the object at ffff88800faa33a0 [ 60.538820] which belongs to the cache vm_area_struct of size 168 [ 60.540316] The buggy address is located 88 bytes inside of [ 60.540316] freed 168-byte region [ffff88800faa33a0, ffff88800faa3448) [ 60.541775] [ 60.541998] The buggy address belongs to the physical page: [ 60.542667] page:00000000587c7219 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfaa3 [ 60.543772] memcg:ffff888019bacc01 [ 60.544211] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.544890] page_type: 0xffffffff() [ 60.545348] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.546296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019bacc01 [ 60.547228] page dumped because: kasan: bad access detected [ 60.547917] [ 60.548140] Memory state around the buggy address: [ 60.548749] ffff88800faa3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 60.549621] ffff88800faa3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 60.550496] >ffff88800faa3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.551375] ^ [ 60.552242] ffff88800faa3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.553124] ffff88800faa3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.553997] ================================================================== [ 60.554964] Disabling lock debugging due to kernel taint [ 62.749731] BUG: Bad rss-counter state mm:000000005b5d4ff8 type:MM_FILEPAGES val:33 [ 62.750757] BUG: Bad rss-counter state mm:000000005b5d4ff8 type:MM_ANONPAGES val:22 [ 63.224039] BUG: Bad rss-counter state mm:00000000aedf8edc type:MM_FILEPAGES val:33 [ 63.225262] BUG: Bad rss-counter state mm:00000000aedf8edc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42429' (ECDSA) to the list of known hosts. 2023/06/20 11:11:48 fuzzer started 2023/06/20 11:11:48 dialing manager at localhost:36067 2023/06/20 11:11:48 checking machine... 2023/06/20 11:11:48 checking revisions... [ 63.941530] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:11:48 testing simple program... [ 63.992188] cgroup: Unknown subsys name 'net' [ 64.030067] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:11:47 Registers: info registers vcpu 0 RAX=ffff888009a9db80 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800ea05080 RBP=ffff8880087b8780 RSP=ffff888018c37c78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800ea05080 R13=0000000000000000 R14=ffff888018c37cd0 R15=ffffea00003b5a00 RIP=ffffffff81803e53 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 00007f1efc336900 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=00007f1efc8eb650 CR3=000000000ea14000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffd29cc3408 CR3=000000000cf0a000 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=2037343a31313a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a31313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000