syzkaller login: [ 32.099962] BUG: Bad rss-counter state mm:00000000775edc81 type:MM_FILEPAGES val:33 [ 32.101042] BUG: Bad rss-counter state mm:00000000775edc81 type:MM_ANONPAGES val:22 [ 32.199845] ================================================================== [ 32.200561] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.201288] Read of size 8 at addr ffff888016f8e4e0 by task sshd/220 [ 32.201931] [ 32.202107] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.202784] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.203543] Call Trace: [ 32.203791] [ 32.204019] dump_stack_lvl+0x91/0xf0 [ 32.204400] print_report+0xcc/0x620 [ 32.204881] ? __virt_addr_valid+0x102/0x340 [ 32.205325] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.205826] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.206312] kasan_report+0xbe/0xf0 [ 32.206678] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.207195] vma_interval_tree_remove+0xc75/0xec0 [ 32.207672] vma_prepare+0xc54/0x11a0 [ 32.208039] __split_vma+0x5af/0x950 [ 32.208407] ? __pfx___split_vma+0x10/0x10 [ 32.208826] ? find_held_lock+0x2c/0x110 [ 32.209229] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.209677] ? lock_is_held_type+0x9f/0x120 [ 32.210118] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.210572] ? mtree_range_walk+0x632/0x900 [ 32.210893] ? mas_walk+0x5c7/0x7c0 [ 32.211173] do_vmi_munmap+0x1f1/0x2b0 [ 32.211458] mmap_region+0x1f9/0x2660 [ 32.211735] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.212029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.212447] ? __pfx_lock_acquire+0x10/0x10 [ 32.212755] ? __pfx_mmap_region+0x10/0x10 [ 32.213064] ? security_mmap_addr+0x7d/0xa0 [ 32.213376] ? get_unmapped_area+0x1f5/0x3f0 [ 32.213697] do_mmap+0x854/0xf00 [ 32.213959] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.214244] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.214562] ksys_mmap_pgoff+0x3af/0x500 [ 32.214853] do_syscall_64+0x3f/0x90 [ 32.215130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.215504] RIP: 0033:0x7f08b8dd5d82 [ 32.215771] 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 [ 32.217011] RSP: 002b:00007fff618e9dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.217547] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08b8dd5d82 [ 32.218045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08b820f000 [ 32.218542] RBP: 00007f08b820f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.219036] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555ffe722f70 [ 32.219523] R13: 00007fff618e9df0 R14: 00007fff618e9e20 R15: 00007fff618ea180 [ 32.220015] [ 32.220181] [ 32.220306] Allocated by task 213: [ 32.220554] kasan_save_stack+0x22/0x50 [ 32.220845] kasan_set_track+0x25/0x30 [ 32.221130] __kasan_slab_alloc+0x59/0x70 [ 32.221432] kmem_cache_alloc+0x16b/0x370 [ 32.221747] vm_area_dup+0x20/0x160 [ 32.222008] __split_vma+0x170/0x950 [ 32.222280] split_vma+0xc6/0x110 [ 32.222538] mprotect_fixup+0x8d2/0xb30 [ 32.222825] do_mprotect_pkey+0x87e/0xd40 [ 32.223130] __x64_sys_mprotect+0x78/0xc0 [ 32.223431] do_syscall_64+0x3f/0x90 [ 32.223705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.224077] [ 32.224199] Freed by task 19: [ 32.224424] kasan_save_stack+0x22/0x50 [ 32.224718] kasan_set_track+0x25/0x30 [ 32.225005] kasan_save_free_info+0x2b/0x50 [ 32.225312] __kasan_slab_free+0x10a/0x190 [ 32.225615] kmem_cache_free+0x10d/0x4d0 [ 32.225912] rcu_core+0x8c8/0x2860 [ 32.226168] __do_softirq+0x1b7/0x7d4 [ 32.226445] [ 32.226566] Last potentially related work creation: [ 32.226900] kasan_save_stack+0x22/0x50 [ 32.227191] __kasan_record_aux_stack+0x8e/0xa0 [ 32.227525] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.227895] remove_vma+0x139/0x170 [ 32.228157] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.228472] do_vmi_munmap+0x1f1/0x2b0 [ 32.228753] __vm_munmap+0x138/0x3a0 [ 32.229018] __x64_sys_munmap+0x59/0x80 [ 32.229303] do_syscall_64+0x3f/0x90 [ 32.229573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.229955] [ 32.230078] The buggy address belongs to the object at ffff888016f8e488 [ 32.230078] which belongs to the cache vm_area_struct of size 168 [ 32.230929] The buggy address is located 88 bytes inside of [ 32.230929] freed 168-byte region [ffff888016f8e488, ffff888016f8e530) [ 32.231750] [ 32.231872] The buggy address belongs to the physical page: [ 32.232259] page:00000000b127172d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f8e [ 32.232880] memcg:ffff88800e1b9e01 [ 32.233121] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.233493] page_type: 0xffffffff() [ 32.233758] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.234287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1b9e01 [ 32.234806] page dumped because: kasan: bad access detected [ 32.235194] [ 32.235324] Memory state around the buggy address: [ 32.235659] ffff888016f8e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.236156] ffff888016f8e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.236652] >ffff888016f8e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.237136] ^ [ 32.237573] ffff888016f8e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.238084] ffff888016f8e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.238569] ================================================================== [ 32.239084] Disabling lock debugging due to kernel taint [ 34.178679] BUG: Bad rss-counter state mm:00000000d736683a type:MM_FILEPAGES val:33 [ 34.179881] BUG: Bad rss-counter state mm:00000000d736683a type:MM_ANONPAGES val:22 [ 34.628097] BUG: Bad rss-counter state mm:00000000770cb21e type:MM_FILEPAGES val:33 [ 34.629282] BUG: Bad rss-counter state mm:00000000770cb21e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21141' (ECDSA) to the list of known hosts. 2023/06/19 22:17:58 fuzzer started 2023/06/19 22:17:58 dialing manager at localhost:44161 2023/06/19 22:17:58 checking machine... 2023/06/19 22:17:58 checking revisions... [ 35.230498] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:17:58 testing simple program... [ 35.282546] cgroup: Unknown subsys name 'net' [ 35.351544] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:17:56 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff837447a6 RDX=0000000000027447 RSI=0000000000027447 RDI=ffffffff86584cdc RBP=ffff888016c4f260 RSP=ffff888016c4f198 R8 =0000000000000000 R9 =ffff888016c4f248 R10=0000000000038001 R11=000000000008de0d R12=ffff888016c4f268 R13=ffff888016c4f250 R14=ffff888016c4f249 R15=ffff888016c4f208 RIP=ffffffff811307c2 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 00007f7d642f3900 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=00007ffd3549a000 CR3=000000001a26c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffff888008c58400 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=00007efcd4a817c0 CR3=000000000f7e4000 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=2037353a37313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a37313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000