[ 32.817302] BUG: Bad rss-counter state mm:00000000ea375fef type:MM_FILEPAGES val:33 [ 32.818356] BUG: Bad rss-counter state mm:00000000ea375fef type:MM_ANONPAGES val:22 [ 32.976638] ================================================================== [ 32.977727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.978702] Read of size 8 at addr ffff888018b84a50 by task sshd/219 [ 32.979582] [ 32.979807] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.980700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.981734] Call Trace: [ 32.982064] [ 32.982359] dump_stack_lvl+0x91/0xf0 [ 32.982873] print_report+0xcc/0x620 [ 32.983366] ? __virt_addr_valid+0x102/0x340 [ 32.983936] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.984581] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.985245] kasan_report+0xbe/0xf0 [ 32.985730] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.986379] vma_interval_tree_remove+0xc75/0xec0 [ 32.987003] vma_prepare+0xc54/0x11a0 [ 32.987497] __split_vma+0x5af/0x950 [ 32.987991] ? __pfx___split_vma+0x10/0x10 [ 32.988539] ? find_held_lock+0x2c/0x110 [ 32.989079] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.989668] ? lock_is_held_type+0x9f/0x120 [ 32.990223] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.990852] ? mtree_range_walk+0x632/0x900 [ 32.991425] ? mas_walk+0x5c7/0x7c0 [ 32.991919] do_vmi_munmap+0x1f1/0x2b0 [ 32.992432] mmap_region+0x1f9/0x2660 [ 32.992961] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.993497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.994241] ? __pfx_lock_acquire+0x10/0x10 [ 32.994814] ? __pfx_mmap_region+0x10/0x10 [ 32.995359] ? security_mmap_addr+0x7d/0xa0 [ 32.995918] ? get_unmapped_area+0x1f5/0x3f0 [ 32.996483] do_mmap+0x854/0xf00 [ 32.996962] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.997484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.998066] ksys_mmap_pgoff+0x3af/0x500 [ 32.998598] do_syscall_64+0x3f/0x90 [ 32.999110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.999777] RIP: 0033:0x7fed76858d82 [ 33.000249] 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 [ 33.002493] RSP: 002b:00007ffededb3d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.003452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed76858d82 [ 33.004347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed75c92000 [ 33.005245] RBP: 00007fed75c92000 R08: 0000000000000009 R09: 0000000000001000 [ 33.006146] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6a4272ec0 [ 33.007034] R13: 00007ffededb3db0 R14: 00007ffededb3de0 R15: 00007ffededb4140 [ 33.007916] [ 33.008234] [ 33.008456] Allocated by task 212: [ 33.008931] kasan_save_stack+0x22/0x50 [ 33.009457] kasan_set_track+0x25/0x30 [ 33.009981] __kasan_slab_alloc+0x59/0x70 [ 33.010536] kmem_cache_alloc+0x16b/0x370 [ 33.011068] vm_area_dup+0x20/0x160 [ 33.011537] __split_vma+0x170/0x950 [ 33.012016] split_vma+0xc6/0x110 [ 33.012464] mprotect_fixup+0x8d2/0xb30 [ 33.013000] do_mprotect_pkey+0x87e/0xd40 [ 33.013546] __x64_sys_mprotect+0x78/0xc0 [ 33.014102] do_syscall_64+0x3f/0x90 [ 33.014598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.015274] [ 33.015498] Freed by task 212: [ 33.015899] kasan_save_stack+0x22/0x50 [ 33.016412] kasan_set_track+0x25/0x30 [ 33.016929] kasan_save_free_info+0x2b/0x50 [ 33.017489] __kasan_slab_free+0x10a/0x190 [ 33.018044] kmem_cache_free+0x10d/0x4d0 [ 33.018575] rcu_core+0x8c8/0x2860 [ 33.019034] __do_softirq+0x1b7/0x7d4 [ 33.019534] [ 33.019753] Last potentially related work creation: [ 33.020353] kasan_save_stack+0x22/0x50 [ 33.020895] __kasan_record_aux_stack+0x8e/0xa0 [ 33.021489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.022165] remove_vma+0x139/0x170 [ 33.022641] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.023212] do_vmi_munmap+0x1f1/0x2b0 [ 33.023732] __vm_munmap+0x138/0x3a0 [ 33.024222] __x64_sys_munmap+0x59/0x80 [ 33.024748] do_syscall_64+0x3f/0x90 [ 33.025244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.025901] [ 33.026124] Second to last potentially related work creation: [ 33.026839] kasan_save_stack+0x22/0x50 [ 33.027355] __kasan_record_aux_stack+0x8e/0xa0 [ 33.027955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.028629] remove_vma+0x139/0x170 [ 33.029121] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.029706] do_vmi_munmap+0x1f1/0x2b0 [ 33.030207] mmap_region+0x1f9/0x2660 [ 33.030723] do_mmap+0x854/0xf00 [ 33.031182] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.031703] ksys_mmap_pgoff+0x3af/0x500 [ 33.032227] do_syscall_64+0x3f/0x90 [ 33.032723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.033409] [ 33.033645] The buggy address belongs to the object at ffff888018b849f8 [ 33.033645] which belongs to the cache vm_area_struct of size 168 [ 33.035183] The buggy address is located 88 bytes inside of [ 33.035183] freed 168-byte region [ffff888018b849f8, ffff888018b84aa0) [ 33.036671] [ 33.036913] The buggy address belongs to the physical page: [ 33.037603] page:000000002f98c535 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18b84 [ 33.038761] memcg:ffff88800c45e401 [ 33.039216] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.039879] page_type: 0xffffffff() [ 33.040352] raw: 0100000000000200 ffff88800879fc80 ffffea0000384c00 0000000000000002 [ 33.041321] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c45e401 [ 33.042260] page dumped because: kasan: bad access detected [ 33.042959] [ 33.043188] Memory state around the buggy address: [ 33.043793] ffff888018b84900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.044710] ffff888018b84980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.045626] >ffff888018b84a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.046513] ^ [ 33.047243] ffff888018b84a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.048140] ffff888018b84b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.049067] ================================================================== [ 33.050240] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.876923] BUG: Bad rss-counter state mm:00000000d9ed3465 type:MM_FILEPAGES val:33 [ 35.877958] BUG: Bad rss-counter state mm:00000000d9ed3465 type:MM_ANONPAGES val:22 [ 36.363898] BUG: Bad rss-counter state mm:00000000c2d3c346 type:MM_FILEPAGES val:33 [ 36.365185] BUG: Bad rss-counter state mm:00000000c2d3c346 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28967' (ECDSA) to the list of known hosts. 2023/06/20 02:25:18 fuzzer started 2023/06/20 02:25:18 dialing manager at localhost:44161 2023/06/20 02:25:18 checking machine... 2023/06/20 02:25:18 checking revisions... [ 37.214629] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:25:19 testing simple program... [ 37.257066] cgroup: Unknown subsys name 'net' [ 37.317115] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:25:09 Registers: info registers vcpu 0 RAX=ffffffff864b4f3d RBX=0000000000000002 RCX=ffffffff864b4f38 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff8605061c RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b4f38 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a72 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 00007fee178cf900 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=00007fee16d1c140 CR3=000000000c64c000 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=1f495036090524a1db4acddc0fb8f6ff XMM02=ec2efd57dc4c00df000000000011e4c8 XMM03=ef57cbf46e0a82ca000000000011e598 XMM04=baa1e0c27a96d0da00000000000ae988 XMM05=9fc5c4a2b8050d6e0000000000136ff8 XMM06=dfcdbad4f1609c370000000000135ae8 XMM07=fb795ef6d65770560000000000124bf0 XMM08=2c67c8bc2e329bc3000000000011e538 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100d9e132e RBX=0000000000000000 RCX=0000000000000100 RDX=ffff888019e18000 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=1ffff1100d9e132e RSP=ffff88806cf09960 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88800db1a280 RIP=ffffffff812d8660 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 00007ff35bfff700 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=00007ffca5958000 CR3=0000000019c9e000 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=2038313a35323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a35323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000