[ 31.836578] BUG: Bad rss-counter state mm:000000001217a420 type:MM_FILEPAGES val:33 [ 31.837732] BUG: Bad rss-counter state mm:000000001217a420 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.998292] ================================================================== [ 31.999341] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.000433] Read of size 8 at addr ffff8880145fa968 by task sshd/218 [ 32.001516] [ 32.001747] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.002597] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.003587] Call Trace: [ 32.003900] [ 32.004177] dump_stack_lvl+0x91/0xf0 [ 32.004669] print_report+0xcc/0x620 [ 32.005149] ? __virt_addr_valid+0x102/0x340 [ 32.005697] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.006316] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.006947] kasan_report+0xbe/0xf0 [ 32.007419] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.008037] vma_interval_tree_remove+0xc75/0xec0 [ 32.008632] vma_prepare+0xc54/0x11a0 [ 32.009104] __split_vma+0x5af/0x950 [ 32.009568] ? __pfx___split_vma+0x10/0x10 [ 32.010088] ? find_held_lock+0x2c/0x110 [ 32.010603] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.011192] ? lock_is_held_type+0x9f/0x120 [ 32.011731] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.012328] ? mtree_range_walk+0x632/0x900 [ 32.012871] ? mas_walk+0x5c7/0x7c0 [ 32.013343] do_vmi_munmap+0x1f1/0x2b0 [ 32.013830] mmap_region+0x1f9/0x2660 [ 32.014307] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.014827] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.015533] ? __pfx_lock_acquire+0x10/0x10 [ 32.016057] ? __pfx_mmap_region+0x10/0x10 [ 32.016581] ? security_mmap_addr+0x7d/0xa0 [ 32.017113] ? get_unmapped_area+0x1f5/0x3f0 [ 32.017655] do_mmap+0x854/0xf00 [ 32.018088] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.018579] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.019149] ksys_mmap_pgoff+0x3af/0x500 [ 32.019660] do_syscall_64+0x3f/0x90 [ 32.020140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.020783] RIP: 0033:0x7fb003f7bd82 [ 32.021234] 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 [ 32.023339] RSP: 002b:00007fff1eb255d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.024380] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb003f7bd82 [ 32.025247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0033b5000 [ 32.026112] RBP: 00007fb0033b5000 R08: 0000000000000009 R09: 0000000000001000 [ 32.026982] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559006a3ab20 [ 32.027849] R13: 00007fff1eb255f0 R14: 00007fff1eb25620 R15: 00007fff1eb25980 [ 32.028732] [ 32.029025] [ 32.029248] Allocated by task 211: [ 32.029684] kasan_save_stack+0x22/0x50 [ 32.030198] kasan_set_track+0x25/0x30 [ 32.030723] __kasan_slab_alloc+0x59/0x70 [ 32.031256] kmem_cache_alloc+0x16b/0x370 [ 32.031779] vm_area_dup+0x20/0x160 [ 32.032237] __split_vma+0x170/0x950 [ 32.032706] split_vma+0xc6/0x110 [ 32.033159] mprotect_fixup+0x8d2/0xb30 [ 32.033667] do_mprotect_pkey+0x87e/0xd40 [ 32.034195] __x64_sys_mprotect+0x78/0xc0 [ 32.034748] do_syscall_64+0x3f/0x90 [ 32.035226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.035865] [ 32.036084] Freed by task 211: [ 32.036478] kasan_save_stack+0x22/0x50 [ 32.036984] kasan_set_track+0x25/0x30 [ 32.037484] kasan_save_free_info+0x2b/0x50 [ 32.038018] __kasan_slab_free+0x10a/0x190 [ 32.038560] kmem_cache_free+0x10d/0x4d0 [ 32.039086] rcu_core+0x8c8/0x2860 [ 32.039537] __do_softirq+0x1b7/0x7d4 [ 32.040136] [ 32.040349] Last potentially related work creation: [ 32.040929] kasan_save_stack+0x22/0x50 [ 32.041431] __kasan_record_aux_stack+0x8e/0xa0 [ 32.042004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.042722] remove_vma+0x139/0x170 [ 32.043167] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.043716] do_vmi_munmap+0x1f1/0x2b0 [ 32.044199] __vm_munmap+0x138/0x3a0 [ 32.044657] __x64_sys_munmap+0x59/0x80 [ 32.045156] do_syscall_64+0x3f/0x90 [ 32.045624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.046254] [ 32.046467] The buggy address belongs to the object at ffff8880145fa910 [ 32.046467] which belongs to the cache vm_area_struct of size 168 [ 32.047930] The buggy address is located 88 bytes inside of [ 32.047930] freed 168-byte region [ffff8880145fa910, ffff8880145fa9b8) [ 32.049323] [ 32.049538] The buggy address belongs to the physical page: [ 32.050195] page:00000000473880d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145fa [ 32.051295] memcg:ffff888016c58601 [ 32.051716] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.052358] page_type: 0xffffffff() [ 32.052802] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.053711] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c58601 [ 32.054604] page dumped because: kasan: bad access detected [ 32.055275] [ 32.055488] Memory state around the buggy address: [ 32.056063] ffff8880145fa800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.056909] ffff8880145fa880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.057766] >ffff8880145fa900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.058612] ^ [ 32.059399] ffff8880145fa980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.060250] ffff8880145faa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.061091] ================================================================== [ 32.062003] Disabling lock debugging due to kernel taint [ 34.140365] BUG: Bad rss-counter state mm:00000000aaa86ea8 type:MM_FILEPAGES val:33 [ 34.141553] BUG: Bad rss-counter state mm:00000000aaa86ea8 type:MM_ANONPAGES val:22 [ 34.608278] BUG: Bad rss-counter state mm:000000000cc6e0fc type:MM_FILEPAGES val:33 [ 34.609475] BUG: Bad rss-counter state mm:000000000cc6e0fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9380' (ECDSA) to the list of known hosts. 2023/06/20 05:26:14 fuzzer started 2023/06/20 05:26:15 dialing manager at localhost:44161 2023/06/20 05:26:15 checking machine... 2023/06/20 05:26:15 checking revisions... [ 35.332973] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:26:15 testing simple program... [ 35.384997] cgroup: Unknown subsys name 'net' [ 35.437014] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:26:13 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09b01 RSI=ffff88806ce09ba8 RDI=ffff88806ce09a88 RBP=ffff88806ce09ad0 RSP=ffff88806ce099f0 R8 =ffffffff860d68fa R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09ad8 R13=ffff88806ce02000 R14=ffff88806ce09bb0 R15=ffff88806ce09a78 RIP=ffffffff811304d1 RFL=00000286 [--S--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 00007fbccf676700 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=00007ffc00f77000 CR3=0000000015f3e000 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=2034313a36323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a36323a3530203032 XMM08=3d656e696c646d632022656369767265 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=00007f945126a5c0 CR3=000000000c5a4000 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=7150578be9e0f0b79849ef740914e482 XMM02=ec2efd57dc4c00df000000000011d518 XMM03=63797410ecf1cc54000000000011d5e8 XMM04=729ac93dec3665a900000000000ae988 XMM05=751b9502027dc0b90000000000133808 XMM06=0355709d76cdeb5000000000001329e0 XMM07=e042d86d42eb936e0000000000124200 XMM08=63797410ecf1cc54000000000011d5e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000