[ 41.994921] BUG: Bad rss-counter state mm:000000006895ffea type:MM_FILEPAGES val:33 [ 41.996122] BUG: Bad rss-counter state mm:000000006895ffea type:MM_ANONPAGES val:22 [ 42.037898] ================================================================== [ 42.038791] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.039940] Read of size 8 at addr ffff88801a242df0 by task sshd/220 [ 42.040712] [ 42.040931] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.041814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.042792] Call Trace: [ 42.043117] [ 42.043405] dump_stack_lvl+0x91/0xf0 [ 42.043901] print_report+0xcc/0x620 [ 42.044387] ? __virt_addr_valid+0x102/0x340 [ 42.044944] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.045596] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.046215] kasan_report+0xbe/0xf0 [ 42.046695] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.047314] vma_interval_tree_remove+0xc75/0xec0 [ 42.047916] vma_prepare+0xc54/0x11a0 [ 42.048404] __split_vma+0x5af/0x950 [ 42.048875] ? __pfx___split_vma+0x10/0x10 [ 42.049415] ? find_held_lock+0x2c/0x110 [ 42.049949] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.050523] ? lock_is_held_type+0x9f/0x120 [ 42.051072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.051692] ? mtree_range_walk+0x632/0x900 [ 42.052249] ? mas_walk+0x5c7/0x7c0 [ 42.052722] do_vmi_munmap+0x1f1/0x2b0 [ 42.053215] mmap_region+0x1f9/0x2660 [ 42.053728] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.054249] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.054976] ? __pfx_lock_acquire+0x10/0x10 [ 42.055513] ? __pfx_mmap_region+0x10/0x10 [ 42.056049] ? security_mmap_addr+0x7d/0xa0 [ 42.056590] ? get_unmapped_area+0x1f5/0x3f0 [ 42.057141] do_mmap+0x854/0xf00 [ 42.057589] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.058089] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.058662] ksys_mmap_pgoff+0x3af/0x500 [ 42.059176] do_syscall_64+0x3f/0x90 [ 42.059656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.060310] RIP: 0033:0x7f16175b1d82 [ 42.060770] 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 [ 42.062952] RSP: 002b:00007ffc0574dca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.063869] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16175b1d82 [ 42.064726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16169eb000 [ 42.065590] RBP: 00007f16169eb000 R08: 0000000000000009 R09: 0000000000001000 [ 42.066473] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589300cbb20 [ 42.067350] R13: 00007ffc0574dcc0 R14: 00007ffc0574dcf0 R15: 00007ffc0574e050 [ 42.068232] [ 42.068544] [ 42.068770] Allocated by task 213: [ 42.069207] kasan_save_stack+0x22/0x50 [ 42.069742] kasan_set_track+0x25/0x30 [ 42.070244] __kasan_slab_alloc+0x59/0x70 [ 42.070803] kmem_cache_alloc+0x16b/0x370 [ 42.071340] vm_area_dup+0x20/0x160 [ 42.071824] __split_vma+0x170/0x950 [ 42.072304] split_vma+0xc6/0x110 [ 42.072758] mprotect_fixup+0x8d2/0xb30 [ 42.073292] do_mprotect_pkey+0x87e/0xd40 [ 42.073830] __x64_sys_mprotect+0x78/0xc0 [ 42.074361] do_syscall_64+0x3f/0x90 [ 42.074841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.075498] [ 42.075716] Freed by task 213: [ 42.076120] kasan_save_stack+0x22/0x50 [ 42.076630] kasan_set_track+0x25/0x30 [ 42.077136] kasan_save_free_info+0x2b/0x50 [ 42.077699] __kasan_slab_free+0x10a/0x190 [ 42.078242] kmem_cache_free+0x10d/0x4d0 [ 42.078762] rcu_core+0x8c8/0x2860 [ 42.079215] __do_softirq+0x1b7/0x7d4 [ 42.079694] [ 42.079913] Last potentially related work creation: [ 42.080512] kasan_save_stack+0x22/0x50 [ 42.081029] __kasan_record_aux_stack+0x8e/0xa0 [ 42.081626] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.082280] remove_vma+0x139/0x170 [ 42.082744] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.083319] do_vmi_munmap+0x1f1/0x2b0 [ 42.083827] __vm_munmap+0x138/0x3a0 [ 42.084304] __x64_sys_munmap+0x59/0x80 [ 42.084819] do_syscall_64+0x3f/0x90 [ 42.085301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.085956] [ 42.086175] The buggy address belongs to the object at ffff88801a242d98 [ 42.086175] which belongs to the cache vm_area_struct of size 168 [ 42.087682] The buggy address is located 88 bytes inside of [ 42.087682] freed 168-byte region [ffff88801a242d98, ffff88801a242e40) [ 42.089121] [ 42.089363] The buggy address belongs to the physical page: [ 42.090036] page:000000004b796c24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a242 [ 42.091140] memcg:ffff88801a224901 [ 42.091573] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.092233] page_type: 0xffffffff() [ 42.092693] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.093633] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a224901 [ 42.094551] page dumped because: kasan: bad access detected [ 42.095224] [ 42.095445] Memory state around the buggy address: [ 42.096032] ffff88801a242c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 42.096951] ffff88801a242d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 42.097841] >ffff88801a242d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 42.098736] ^ [ 42.099584] ffff88801a242e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 42.100488] ffff88801a242e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.101391] ================================================================== [ 42.102706] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.602013] BUG: Bad rss-counter state mm:0000000071b2e96d type:MM_FILEPAGES val:33 [ 43.602774] BUG: Bad rss-counter state mm:0000000071b2e96d type:MM_ANONPAGES val:22 [ 44.008391] BUG: Bad rss-counter state mm:00000000465d2663 type:MM_FILEPAGES val:33 [ 44.009140] BUG: Bad rss-counter state mm:00000000465d2663 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3830' (ECDSA) to the list of known hosts. 2023/06/19 17:40:24 fuzzer started 2023/06/19 17:40:24 dialing manager at localhost:44161 2023/06/19 17:40:24 checking machine... 2023/06/19 17:40:24 checking revisions... [ 44.749051] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:40:25 testing simple program... [ 44.790203] cgroup: Unknown subsys name 'net' [ 44.820409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:40:13 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000000a RCX=ffffffff837264db RDX=ffff88800f7b9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=000000000000000b RSP=ffff888019c5f7b8 R8 =0000000000000005 R9 =0000000000000000 R10=00000000000000e8 R11=00000cd700000cd7 R12=0000000000000002 R13=ffffffff87f96b30 R14=00000000000000e8 R15=0000000000000006 RIP=ffffffff814c07eb RFL=00000206 [-----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 00007f0dcdd73900 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=00007fff40cf8000 CR3=0000000018238000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=0000000000000001 RDI=ffff888008e27dc8 RBP=0000000000000000 RSP=ffff888008e27dc0 R8 =00000008271ebd31 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450c180 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 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=00007f80ab3d1bf0 CR3=000000000de40000 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=2034323a30343a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30343a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000