[ 32.848180] BUG: Bad rss-counter state mm:000000000c253116 type:MM_FILEPAGES val:33 [ 32.849550] BUG: Bad rss-counter state mm:000000000c253116 type:MM_ANONPAGES val:22 [ 32.997668] ================================================================== [ 32.999024] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.000139] Read of size 8 at addr ffff888009546058 by task sshd/218 [ 33.001260] [ 33.001527] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.002573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.003782] Call Trace: [ 33.004173] [ 33.004520] dump_stack_lvl+0x91/0xf0 [ 33.005103] print_report+0xcc/0x620 [ 33.005685] ? __virt_addr_valid+0x102/0x340 [ 33.006365] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.007118] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.007851] kasan_report+0xbe/0xf0 [ 33.008418] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.009160] vma_interval_tree_remove+0xc75/0xec0 [ 33.009884] vma_prepare+0xc54/0x11a0 [ 33.010477] __split_vma+0x5af/0x950 [ 33.011050] ? __pfx___split_vma+0x10/0x10 [ 33.011686] ? find_held_lock+0x2c/0x110 [ 33.012311] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.012991] ? lock_is_held_type+0x9f/0x120 [ 33.013643] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.014385] ? mtree_range_walk+0x632/0x900 [ 33.015046] ? mas_walk+0x5c7/0x7c0 [ 33.015621] do_vmi_munmap+0x1f1/0x2b0 [ 33.016213] mmap_region+0x1f9/0x2660 [ 33.016799] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.017416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.018288] ? __pfx_lock_acquire+0x10/0x10 [ 33.018946] ? __pfx_mmap_region+0x10/0x10 [ 33.019587] ? security_mmap_addr+0x7d/0xa0 [ 33.020224] ? get_unmapped_area+0x1f5/0x3f0 [ 33.020884] do_mmap+0x854/0xf00 [ 33.021408] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.022012] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.022699] ksys_mmap_pgoff+0x3af/0x500 [ 33.023310] do_syscall_64+0x3f/0x90 [ 33.023884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.024671] RIP: 0033:0x7f1bc9659d82 [ 33.025231] 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 [ 33.027509] RSP: 002b:00007ffc8952c6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.028369] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1bc9659d82 [ 33.029176] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1bc8a93000 [ 33.029973] RBP: 00007f1bc8a93000 R08: 0000000000000009 R09: 0000000000001000 [ 33.030812] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c022d04b20 [ 33.031653] R13: 00007ffc8952c6c0 R14: 00007ffc8952c6f0 R15: 00007ffc8952ca50 [ 33.032493] [ 33.032780] [ 33.032986] Allocated by task 211: [ 33.033411] kasan_save_stack+0x22/0x50 [ 33.033894] kasan_set_track+0x25/0x30 [ 33.034367] __kasan_slab_alloc+0x59/0x70 [ 33.034860] kmem_cache_alloc+0x16b/0x370 [ 33.035346] vm_area_dup+0x20/0x160 [ 33.035781] __split_vma+0x170/0x950 [ 33.036219] split_vma+0xc6/0x110 [ 33.036637] mprotect_fixup+0x8d2/0xb30 [ 33.037121] do_mprotect_pkey+0x87e/0xd40 [ 33.037612] __x64_sys_mprotect+0x78/0xc0 [ 33.038100] do_syscall_64+0x3f/0x90 [ 33.038567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.039178] [ 33.039391] Freed by task 211: [ 33.039774] kasan_save_stack+0x22/0x50 [ 33.040260] kasan_set_track+0x25/0x30 [ 33.040736] kasan_save_free_info+0x2b/0x50 [ 33.041256] __kasan_slab_free+0x10a/0x190 [ 33.041767] kmem_cache_free+0x10d/0x4d0 [ 33.042312] rcu_core+0x8c8/0x2860 [ 33.042760] __do_softirq+0x1b7/0x7d4 [ 33.043229] [ 33.043437] Last potentially related work creation: [ 33.044004] kasan_save_stack+0x22/0x50 [ 33.044494] __kasan_record_aux_stack+0x8e/0xa0 [ 33.045043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.045666] remove_vma+0x139/0x170 [ 33.046102] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.046644] do_vmi_munmap+0x1f1/0x2b0 [ 33.047118] __vm_munmap+0x138/0x3a0 [ 33.047569] __x64_sys_munmap+0x59/0x80 [ 33.048054] do_syscall_64+0x3f/0x90 [ 33.048515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.049126] [ 33.049340] Second to last potentially related work creation: [ 33.050000] kasan_save_stack+0x22/0x50 [ 33.050511] __kasan_record_aux_stack+0x8e/0xa0 [ 33.051060] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.051678] remove_vma+0x139/0x170 [ 33.052125] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.052664] do_vmi_munmap+0x1f1/0x2b0 [ 33.053137] mmap_region+0x1f9/0x2660 [ 33.053607] do_mmap+0x854/0xf00 [ 33.054022] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.054496] ksys_mmap_pgoff+0x3af/0x500 [ 33.054973] do_syscall_64+0x3f/0x90 [ 33.055431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.056060] [ 33.056272] The buggy address belongs to the object at ffff888009546000 [ 33.056272] which belongs to the cache vm_area_struct of size 168 [ 33.057706] The buggy address is located 88 bytes inside of [ 33.057706] freed 168-byte region [ffff888009546000, ffff8880095460a8) [ 33.059080] [ 33.059295] The buggy address belongs to the physical page: [ 33.059927] page:0000000036274ae2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9546 [ 33.060981] memcg:ffff888009547001 [ 33.061396] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.062075] page_type: 0xffffffff() [ 33.062534] raw: 0100000000000200 ffff88800879fc80 ffffea0000377b00 dead000000000005 [ 33.063428] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009547001 [ 33.064300] page dumped because: kasan: bad access detected [ 33.064937] [ 33.065148] Memory state around the buggy address: [ 33.065710] ffff888009545f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 33.066544] ffff888009545f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.067372] >ffff888009546000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.068191] ^ [ 33.068892] ffff888009546080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 33.069731] ffff888009546100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.070574] ================================================================== [ 33.071650] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.073403] BUG: Bad rss-counter state mm:0000000028ec8aa8 type:MM_FILEPAGES val:33 [ 35.074385] BUG: Bad rss-counter state mm:0000000028ec8aa8 type:MM_ANONPAGES val:22 [ 35.622846] BUG: Bad rss-counter state mm:00000000fdd3cf88 type:MM_FILEPAGES val:33 [ 35.624018] BUG: Bad rss-counter state mm:00000000fdd3cf88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34857' (ECDSA) to the list of known hosts. 2023/06/19 13:55:38 fuzzer started 2023/06/19 13:55:38 dialing manager at localhost:44161 2023/06/19 13:55:38 checking machine... 2023/06/19 13:55:38 checking revisions... [ 36.265953] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:55:38 testing simple program... [ 36.311085] cgroup: Unknown subsys name 'net' [ 36.365793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:55:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002f2ef7b RCX=0000000000000000 RDX=ffffed1002c3d07d RSI=0000000000000000 RDI=ffff88806ce39500 RBP=ffff8880161e8000 RSP=ffff888017977b88 R8 =0000000000000000 R9 =ffff8880161e83e0 R10=ffff8880161e83e7 R11=0000000000000000 R12=0000000000000202 R13=ffff8880161e8910 R14=ffff8880161e8014 R15=ffff88806ce39500 RIP=ffffffff8452fbb5 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 00007f031ad7e700 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=00007fa1e2b080b0 CR3=000000001a052000 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=35353a3331203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732038333a3535 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323939 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f478b9e6970 CR3=000000000d90a000 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=298de0a9bbc128b3a34bb442df2702a1 XMM02=000000000011d688ec2efd57dc4c00df XMM03=0000000000124450bd1b34be312b0dc3 XMM04=d7b98af2bfb3070a00000000000ae988 XMM05=06355c87c0ba6ca90000000000135e18 XMM06=bdf2e299e47b49d50000000000134ed0 XMM07=e042d86d42eb936e0000000000124728 XMM08=bd1b34be312b0dc3000000000011d6e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000