[ 30.579066] BUG: Bad rss-counter state mm:0000000039e480da type:MM_FILEPAGES val:33 [ 30.580471] BUG: Bad rss-counter state mm:0000000039e480da type:MM_ANONPAGES val:22 [ 30.730271] ================================================================== [ 30.731192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.732136] Read of size 8 at addr ffff88800c52fc20 by task sshd/219 [ 30.732901] [ 30.733217] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.734102] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.735080] Call Trace: [ 30.735419] <TASK> [ 30.735703] dump_stack_lvl+0x91/0xf0 [ 30.736203] print_report+0xcc/0x620 [ 30.736689] ? __virt_addr_valid+0x102/0x340 [ 30.737244] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.737857] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738484] kasan_report+0xbe/0xf0 [ 30.738965] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739587] vma_interval_tree_remove+0xc75/0xec0 [ 30.740189] vma_prepare+0xc54/0x11a0 [ 30.740676] __split_vma+0x5af/0x950 [ 30.741148] ? __pfx___split_vma+0x10/0x10 [ 30.741677] ? find_held_lock+0x2c/0x110 [ 30.742209] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.742778] ? lock_is_held_type+0x9f/0x120 [ 30.743318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.743932] ? mtree_range_walk+0x632/0x900 [ 30.744487] ? mas_walk+0x5c7/0x7c0 [ 30.744967] do_vmi_munmap+0x1f1/0x2b0 [ 30.745463] mmap_region+0x1f9/0x2660 [ 30.745948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.746484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.747208] ? __pfx_lock_acquire+0x10/0x10 [ 30.747747] ? __pfx_mmap_region+0x10/0x10 [ 30.748275] ? security_mmap_addr+0x7d/0xa0 [ 30.748808] ? get_unmapped_area+0x1f5/0x3f0 [ 30.749354] do_mmap+0x854/0xf00 [ 30.749797] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.750299] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.750863] ksys_mmap_pgoff+0x3af/0x500 [ 30.751369] do_syscall_64+0x3f/0x90 [ 30.751850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.752493] RIP: 0033:0x7f5111b5dd82 [ 30.752959] 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 [ 30.755155] RSP: 002b:00007ffd2fa432e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.756063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5111b5dd82 [ 30.756917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5110f97000 [ 30.757769] RBP: 00007f5110f97000 R08: 0000000000000009 R09: 0000000000001000 [ 30.758637] R10: 0000000000000812 R11: 0000000000000206 R12: 000055580a284d90 [ 30.759495] R13: 00007ffd2fa43300 R14: 00007ffd2fa43330 R15: 00007ffd2fa43690 [ 30.760361] </TASK> [ 30.760656] [ 30.760877] Allocated by task 211: [ 30.761309] kasan_save_stack+0x22/0x50 [ 30.761817] kasan_set_track+0x25/0x30 [ 30.762325] __kasan_slab_alloc+0x59/0x70 [ 30.762859] kmem_cache_alloc+0x16b/0x370 [ 30.763381] vm_area_dup+0x20/0x160 [ 30.763842] __split_vma+0x170/0x950 [ 30.764306] split_vma+0xc6/0x110 [ 30.764758] mprotect_fixup+0x8d2/0xb30 [ 30.765262] do_mprotect_pkey+0x87e/0xd40 [ 30.765785] __x64_sys_mprotect+0x78/0xc0 [ 30.766333] do_syscall_64+0x3f/0x90 [ 30.766817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767462] [ 30.767685] Freed by task 211: [ 30.768076] kasan_save_stack+0x22/0x50 [ 30.768578] kasan_set_track+0x25/0x30 [ 30.769074] kasan_save_free_info+0x2b/0x50 [ 30.769617] __kasan_slab_free+0x10a/0x190 [ 30.770166] kmem_cache_free+0x10d/0x4d0 [ 30.770680] rcu_core+0x8c8/0x2860 [ 30.771128] __do_softirq+0x1b7/0x7d4 [ 30.771608] [ 30.771827] Last potentially related work creation: [ 30.772416] kasan_save_stack+0x22/0x50 [ 30.772917] __kasan_record_aux_stack+0x8e/0xa0 [ 30.773494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.774153] remove_vma+0x139/0x170 [ 30.774604] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.775164] do_vmi_munmap+0x1f1/0x2b0 [ 30.775653] __vm_munmap+0x138/0x3a0 [ 30.776124] __x64_sys_munmap+0x59/0x80 [ 30.776621] do_syscall_64+0x3f/0x90 [ 30.777102] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.777757] [ 30.777977] The buggy address belongs to the object at ffff88800c52fbc8 [ 30.777977] which belongs to the cache vm_area_struct of size 168 [ 30.779476] The buggy address is located 88 bytes inside of [ 30.779476] freed 168-byte region [ffff88800c52fbc8, ffff88800c52fc70) [ 30.780882] [ 30.781101] The buggy address belongs to the physical page: [ 30.781759] page:000000004463e1a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc52f [ 30.782856] memcg:ffff88800dfc5b01 [ 30.783281] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.783926] page_type: 0xffffffff() [ 30.784378] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.785304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc5b01 [ 30.786222] page dumped because: kasan: bad access detected [ 30.786892] [ 30.787111] Memory state around the buggy address: [ 30.787697] ffff88800c52fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.788549] ffff88800c52fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.789404] >ffff88800c52fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.790261] ^ [ 30.790790] ffff88800c52fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.791649] ffff88800c52fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.792504] ================================================================== [ 30.793796] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.883638] BUG: Bad rss-counter state mm:000000002af499bd type:MM_FILEPAGES val:33 [ 32.884622] BUG: Bad rss-counter state mm:000000002af499bd type:MM_ANONPAGES val:22 [ 33.385638] BUG: Bad rss-counter state mm:00000000c8068563 type:MM_FILEPAGES val:33 [ 33.386879] BUG: Bad rss-counter state mm:00000000c8068563 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52297' (ECDSA) to the list of known hosts. 2023/06/20 17:20:33 fuzzer started 2023/06/20 17:20:33 dialing manager at localhost:36067 2023/06/20 17:20:33 checking machine... 2023/06/20 17:20:33 checking revisions... [ 34.097296] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:20:34 testing simple program... [ 34.142016] cgroup: Unknown subsys name 'net' [ 34.197808] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:20:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888016be74f8 RSI=ffffffff8363e261 RDI=ffff888016be74f8 RBP=ffff888016be7590 RSP=ffff888016be74e0 R8 =0000000000000001 R9 =ffff888016be7538 R10=0000000000038001 R11=000000000008aa79 R12=ffff888016be75c0 R13=0000000000000000 R14=ffff888016881b40 R15=ffff888016be74f8 RIP=ffffffff811305e8 RFL=00000202 [-------] 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 00007fedd7056900 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=00007fedd760b650 CR3=000000000c56a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fd3afa1c1c0 CR3=000000000d84a000 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=4dc6a4920c4a0bb6764559f87c565f18 XMM02=000000000011b778ec2efd57dc4c00df XMM03=0000000000121980a9ea825299e7f1a3 XMM04=b83cc42b2d29c33f00000000000ae988 XMM05=6db9949d706024920000000000131bf8 XMM06=806171799158d9670000000000131368 XMM07=e042d86d42eb936e0000000000121c00 XMM08=a9ea825299e7f1a3000000000011b7d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000