[ 23.828464] BUG: Bad rss-counter state mm:00000000110b7bcb type:MM_FILEPAGES val:33 [ 23.830030] BUG: Bad rss-counter state mm:00000000110b7bcb type:MM_ANONPAGES val:22 [ 23.990273] ================================================================== [ 23.991146] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.992050] Read of size 8 at addr ffff88800e0824e0 by task sshd/218 [ 23.992806] [ 23.993124] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.993963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.994907] Call Trace: [ 23.995232] [ 23.995510] dump_stack_lvl+0x91/0xf0 [ 23.995984] print_report+0xcc/0x620 [ 23.996475] ? __virt_addr_valid+0x102/0x340 [ 23.997013] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.997607] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.998199] kasan_report+0xbe/0xf0 [ 23.998665] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.999270] vma_interval_tree_remove+0xc75/0xec0 [ 23.999859] vma_prepare+0xc54/0x11a0 [ 24.000339] __split_vma+0x5af/0x950 [ 24.000797] ? __pfx___split_vma+0x10/0x10 [ 24.001309] ? find_held_lock+0x2c/0x110 [ 24.001812] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.002379] ? lock_is_held_type+0x9f/0x120 [ 24.002904] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.003487] ? mtree_range_walk+0x632/0x900 [ 24.004007] ? mas_walk+0x5c7/0x7c0 [ 24.004468] do_vmi_munmap+0x1f1/0x2b0 [ 24.004933] mmap_region+0x1f9/0x2660 [ 24.005394] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.005879] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.006556] ? __pfx_lock_acquire+0x10/0x10 [ 24.007056] ? __pfx_mmap_region+0x10/0x10 [ 24.007555] ? security_mmap_addr+0x7d/0xa0 [ 24.008061] ? get_unmapped_area+0x1f5/0x3f0 [ 24.008601] do_mmap+0x854/0xf00 [ 24.009022] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.009490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.010027] ksys_mmap_pgoff+0x3af/0x500 [ 24.010506] do_syscall_64+0x3f/0x90 [ 24.010959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.011572] RIP: 0033:0x7f84dc65bd82 [ 24.012002] 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 [ 24.014058] RSP: 002b:00007fff28fae068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.014957] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84dc65bd82 [ 24.015799] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84dba95000 [ 24.016652] RBP: 00007f84dba95000 R08: 0000000000000009 R09: 0000000000001000 [ 24.017495] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557baaf5eec0 [ 24.018344] R13: 00007fff28fae080 R14: 00007fff28fae0b0 R15: 00007fff28fae410 [ 24.019194] [ 24.019482] [ 24.019693] Allocated by task 211: [ 24.020118] kasan_save_stack+0x22/0x50 [ 24.020635] kasan_set_track+0x25/0x30 [ 24.021123] __kasan_slab_alloc+0x59/0x70 [ 24.021639] kmem_cache_alloc+0x16b/0x370 [ 24.022152] vm_area_dup+0x20/0x160 [ 24.022608] __split_vma+0x170/0x950 [ 24.023066] split_vma+0xc6/0x110 [ 24.023501] mprotect_fixup+0x8d2/0xb30 [ 24.023996] do_mprotect_pkey+0x87e/0xd40 [ 24.024527] __x64_sys_mprotect+0x78/0xc0 [ 24.025033] do_syscall_64+0x3f/0x90 [ 24.025622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.026257] [ 24.026466] Freed by task 211: [ 24.026851] kasan_save_stack+0x22/0x50 [ 24.027344] kasan_set_track+0x25/0x30 [ 24.027835] kasan_save_free_info+0x2b/0x50 [ 24.028370] __kasan_slab_free+0x10a/0x190 [ 24.028907] kmem_cache_free+0x10d/0x4d0 [ 24.029413] rcu_core+0x8c8/0x2860 [ 24.029859] __do_softirq+0x1b7/0x7d4 [ 24.030339] [ 24.030556] Last potentially related work creation: [ 24.031132] kasan_save_stack+0x22/0x50 [ 24.031637] __kasan_record_aux_stack+0x8e/0xa0 [ 24.032210] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.032859] remove_vma+0x139/0x170 [ 24.033303] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.033852] do_vmi_munmap+0x1f1/0x2b0 [ 24.034332] __vm_munmap+0x138/0x3a0 [ 24.034791] __x64_sys_munmap+0x59/0x80 [ 24.035286] do_syscall_64+0x3f/0x90 [ 24.035747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.036399] [ 24.036612] Second to last potentially related work creation: [ 24.037274] kasan_save_stack+0x22/0x50 [ 24.037761] __kasan_record_aux_stack+0x8e/0xa0 [ 24.038332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.038956] remove_vma+0x139/0x170 [ 24.039397] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.039946] do_vmi_munmap+0x1f1/0x2b0 [ 24.040443] mmap_region+0x1f9/0x2660 [ 24.040916] do_mmap+0x854/0xf00 [ 24.041343] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.041824] ksys_mmap_pgoff+0x7d/0x500 [ 24.042313] do_syscall_64+0x3f/0x90 [ 24.042787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.043423] [ 24.043636] The buggy address belongs to the object at ffff88800e082488 [ 24.043636] which belongs to the cache vm_area_struct of size 168 [ 24.045110] The buggy address is located 88 bytes inside of [ 24.045110] freed 168-byte region [ffff88800e082488, ffff88800e082530) [ 24.046498] [ 24.046709] The buggy address belongs to the physical page: [ 24.047363] page:00000000eb5094d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe082 [ 24.048453] memcg:ffff88800eec0401 [ 24.048871] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.049562] page_type: 0xffffffff() [ 24.050006] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.050921] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eec0401 [ 24.051819] page dumped because: kasan: bad access detected [ 24.052480] [ 24.052688] Memory state around the buggy address: [ 24.053257] ffff88800e082380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.054102] ffff88800e082400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.054953] >ffff88800e082480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.055795] ^ [ 24.056546] ffff88800e082500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.057388] ffff88800e082580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.058234] ================================================================== [ 24.059205] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.856600] BUG: Bad rss-counter state mm:000000002627ca7b type:MM_FILEPAGES val:33 [ 25.857613] BUG: Bad rss-counter state mm:000000002627ca7b type:MM_ANONPAGES val:22 [ 26.199365] BUG: Bad rss-counter state mm:00000000b4f926b7 type:MM_FILEPAGES val:33 [ 26.200310] BUG: Bad rss-counter state mm:00000000b4f926b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16525' (ECDSA) to the list of known hosts. 2023/06/21 05:11:15 fuzzer started 2023/06/21 05:11:16 dialing manager at localhost:36067 2023/06/21 05:11:16 checking machine... 2023/06/21 05:11:16 checking revisions... [ 27.042616] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:11:16 testing simple program... [ 27.094914] cgroup: Unknown subsys name 'net' [ 27.145964] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:11:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f07de518080 CR3=000000000d380000 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=584b53173f7b1b8d9a460221fdcb4faf XMM02=000000000011a678ec2efd57dc4c00df XMM03=00000000001214c86f840e0897dfbf6a XMM04=f94ca4bd6c61bdfb00000000000ae988 XMM05=751b9502027dc0b90000000000132468 XMM06=bdf2e299e47b49d500000000001322f0 XMM07=e042d86d42eb936e0000000000121748 XMM08=6f840e0897dfbf6a000000000011a6d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff81809add RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88806cf09e10 RDI=ffffffff81809add RBP=ffffffff81809add RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=0000000000000001 R13=0000000000000000 R14=ffff888019e1d1c0 R15=ffff88801a2a52e0 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f0b5e940900 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=00007ffc5ee56000 CR3=0000000016764000 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=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