syzkaller login: [ 32.520203] BUG: Bad rss-counter state mm:00000000577fda95 type:MM_FILEPAGES val:33 [ 32.521509] BUG: Bad rss-counter state mm:00000000577fda95 type:MM_ANONPAGES val:22 [ 32.558000] ================================================================== [ 32.558979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.560049] Read of size 8 at addr ffff88800dd9fa50 by task sshd/219 [ 32.560861] [ 32.561107] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.562050] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.563087] Call Trace: [ 32.563425] [ 32.563727] dump_stack_lvl+0x91/0xf0 [ 32.564253] print_report+0xcc/0x620 [ 32.564769] ? __virt_addr_valid+0x102/0x340 [ 32.565376] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.566040] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.566698] kasan_report+0xbe/0xf0 [ 32.567209] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.567873] vma_interval_tree_remove+0xc75/0xec0 [ 32.568522] vma_prepare+0xc54/0x11a0 [ 32.569065] __split_vma+0x5af/0x950 [ 32.569575] ? __pfx___split_vma+0x10/0x10 [ 32.570134] ? find_held_lock+0x2c/0x110 [ 32.570705] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.571332] ? lock_is_held_type+0x9f/0x120 [ 32.571944] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.572626] ? mtree_range_walk+0x632/0x900 [ 32.573250] ? mas_walk+0x5c7/0x7c0 [ 32.573799] do_vmi_munmap+0x1f1/0x2b0 [ 32.574371] mmap_region+0x1f9/0x2660 [ 32.574919] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.575513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.576342] ? __pfx_lock_acquire+0x10/0x10 [ 32.576977] ? __pfx_mmap_region+0x10/0x10 [ 32.577581] ? security_mmap_addr+0x7d/0xa0 [ 32.578196] ? get_unmapped_area+0x1f5/0x3f0 [ 32.578832] do_mmap+0x854/0xf00 [ 32.579339] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.579919] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.580571] ksys_mmap_pgoff+0x3af/0x500 [ 32.581171] do_syscall_64+0x3f/0x90 [ 32.581726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.582479] RIP: 0033:0x7f2ffdde4d82 [ 32.583009] 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 [ 32.585493] RSP: 002b:00007ffd0a6950b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.586546] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ffdde4d82 [ 32.587543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ffd21e000 [ 32.588521] RBP: 00007f2ffd21e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.589521] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c9017ad90 [ 32.590457] R13: 00007ffd0a6950d0 R14: 00007ffd0a695100 R15: 00007ffd0a695460 [ 32.591409] [ 32.591730] [ 32.591964] Allocated by task 212: [ 32.592431] kasan_save_stack+0x22/0x50 [ 32.593011] kasan_set_track+0x25/0x30 [ 32.593557] __kasan_slab_alloc+0x59/0x70 [ 32.594135] kmem_cache_alloc+0x16b/0x370 [ 32.594707] vm_area_dup+0x20/0x160 [ 32.595211] __split_vma+0x170/0x950 [ 32.595726] split_vma+0xc6/0x110 [ 32.596213] mprotect_fixup+0x8d2/0xb30 [ 32.596769] do_mprotect_pkey+0x87e/0xd40 [ 32.597367] __x64_sys_mprotect+0x78/0xc0 [ 32.597939] do_syscall_64+0x3f/0x90 [ 32.598463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.599169] [ 32.599409] Freed by task 212: [ 32.599846] kasan_save_stack+0x22/0x50 [ 32.600396] kasan_set_track+0x25/0x30 [ 32.600953] kasan_save_free_info+0x2b/0x50 [ 32.601547] __kasan_slab_free+0x10a/0x190 [ 32.602137] kmem_cache_free+0x10d/0x4d0 [ 32.602704] rcu_core+0x8c8/0x2860 [ 32.603196] __do_softirq+0x1b7/0x7d4 [ 32.603723] [ 32.603963] Last potentially related work creation: [ 32.604614] kasan_save_stack+0x22/0x50 [ 32.605200] __kasan_record_aux_stack+0x8e/0xa0 [ 32.605843] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.606568] remove_vma+0x139/0x170 [ 32.607071] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.607693] do_vmi_munmap+0x1f1/0x2b0 [ 32.608234] __vm_munmap+0x138/0x3a0 [ 32.608758] __x64_sys_munmap+0x59/0x80 [ 32.609314] do_syscall_64+0x3f/0x90 [ 32.609869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.610595] [ 32.610835] The buggy address belongs to the object at ffff88800dd9f9f8 [ 32.610835] which belongs to the cache vm_area_struct of size 168 [ 32.612491] The buggy address is located 88 bytes inside of [ 32.612491] freed 168-byte region [ffff88800dd9f9f8, ffff88800dd9faa0) [ 32.614065] [ 32.614303] The buggy address belongs to the physical page: [ 32.615036] page:000000000aefcdb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd9f [ 32.616265] memcg:ffff88801976ea01 [ 32.616751] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.617496] page_type: 0xffffffff() [ 32.617988] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.618961] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801976ea01 [ 32.619945] page dumped because: kasan: bad access detected [ 32.620653] [ 32.620892] Memory state around the buggy address: [ 32.621518] ffff88800dd9f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.622448] ffff88800dd9f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.623381] >ffff88800dd9fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.624298] ^ [ 32.625073] ffff88800dd9fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.626004] ffff88800dd9fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.626937] ================================================================== [ 32.628086] Disabling lock debugging due to kernel taint [ 34.167391] BUG: Bad rss-counter state mm:00000000d85d64a3 type:MM_FILEPAGES val:33 [ 34.167949] BUG: Bad rss-counter state mm:00000000d85d64a3 type:MM_ANONPAGES val:22 [ 34.562034] BUG: Bad rss-counter state mm:00000000fbd3ed80 type:MM_FILEPAGES val:33 [ 34.563406] BUG: Bad rss-counter state mm:00000000fbd3ed80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46426' (ECDSA) to the list of known hosts. 2023/06/19 20:55:26 fuzzer started 2023/06/19 20:55:27 dialing manager at localhost:44161 2023/06/19 20:55:27 checking machine... 2023/06/19 20:55:27 checking revisions... [ 35.336442] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:55:27 testing simple program... [ 35.380713] cgroup: Unknown subsys name 'net' [ 35.423051] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:55:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800feef9b0 RSP=ffff88800feef8e8 R8 =ffffffff864b9d5a R9 =ffff88800feef998 R10=0000000000038001 R11=00000000000b6996 R12=ffff88800feef9b8 R13=ffff88800feef9a0 R14=ffff88800feef999 R15=ffff88800feef958 RIP=ffffffff81130ad6 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 00007fa4b7dd9900 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=00007fa4b8390618 CR3=000000000c4d0000 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=563412feff00545000000000000080fe 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f9ba53b1940 CR3=00000000096b0000 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=2036323a35353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a35353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000