[ 24.970289] sshd (213) used greatest stack depth: 23992 bytes left [ 24.971624] BUG: Bad rss-counter state mm:00000000dd1d8621 type:MM_FILEPAGES val:33 [ 24.973021] BUG: Bad rss-counter state mm:00000000dd1d8621 type:MM_ANONPAGES val:22 [ 25.122945] ================================================================== [ 25.123861] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.124791] Read of size 8 at addr ffff88800e3e7798 by task sshd/220 [ 25.125556] [ 25.125771] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.126825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.127803] Call Trace: [ 25.128150] [ 25.128436] dump_stack_lvl+0x91/0xf0 [ 25.128941] print_report+0xcc/0x620 [ 25.129426] ? __virt_addr_valid+0x102/0x340 [ 25.129982] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.130597] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.131215] kasan_report+0xbe/0xf0 [ 25.131703] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.132343] vma_interval_tree_remove+0xc75/0xec0 [ 25.132945] vma_prepare+0xc54/0x11a0 [ 25.133426] __split_vma+0x5af/0x950 [ 25.133894] ? __pfx___split_vma+0x10/0x10 [ 25.134426] ? find_held_lock+0x2c/0x110 [ 25.134947] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.135509] ? lock_is_held_type+0x9f/0x120 [ 25.136058] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.136665] ? mtree_range_walk+0x632/0x900 [ 25.137216] ? mas_walk+0x5c7/0x7c0 [ 25.137693] do_vmi_munmap+0x1f1/0x2b0 [ 25.138184] mmap_region+0x1f9/0x2660 [ 25.138664] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.139175] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.139891] ? __pfx_lock_acquire+0x10/0x10 [ 25.140438] ? __pfx_mmap_region+0x10/0x10 [ 25.140962] ? security_mmap_addr+0x7d/0xa0 [ 25.141496] ? get_unmapped_area+0x1f5/0x3f0 [ 25.142042] do_mmap+0x854/0xf00 [ 25.142481] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.142974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.143535] ksys_mmap_pgoff+0x3af/0x500 [ 25.144054] do_syscall_64+0x3f/0x90 [ 25.144531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.145171] RIP: 0033:0x7f4113ab8d82 [ 25.145632] 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 [ 25.147733] RSP: 002b:00007ffc69d1a148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.148651] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4113ab8d82 [ 25.149494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4112ef2000 [ 25.150344] RBP: 00007f4112ef2000 R08: 0000000000000009 R09: 0000000000001000 [ 25.151192] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cace07ec0 [ 25.152041] R13: 00007ffc69d1a160 R14: 00007ffc69d1a190 R15: 00007ffc69d1a4f0 [ 25.152904] [ 25.153196] [ 25.153408] Allocated by task 213: [ 25.153833] kasan_save_stack+0x22/0x50 [ 25.154335] kasan_set_track+0x25/0x30 [ 25.154826] __kasan_slab_alloc+0x59/0x70 [ 25.155345] kmem_cache_alloc+0x16b/0x370 [ 25.155861] vm_area_dup+0x20/0x160 [ 25.156328] __split_vma+0x170/0x950 [ 25.156796] split_vma+0xc6/0x110 [ 25.157234] mprotect_fixup+0x8d2/0xb30 [ 25.157736] do_mprotect_pkey+0x87e/0xd40 [ 25.158250] __x64_sys_mprotect+0x78/0xc0 [ 25.158765] do_syscall_64+0x3f/0x90 [ 25.159233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.159973] [ 25.160186] Freed by task 213: [ 25.160572] kasan_save_stack+0x22/0x50 [ 25.161070] kasan_set_track+0x25/0x30 [ 25.161562] kasan_save_free_info+0x2b/0x50 [ 25.162086] __kasan_slab_free+0x10a/0x190 [ 25.162622] kmem_cache_free+0x10d/0x4d0 [ 25.163131] rcu_core+0x8c8/0x2860 [ 25.163569] __do_softirq+0x1b7/0x7d4 [ 25.164057] [ 25.164268] Last potentially related work creation: [ 25.164856] kasan_save_stack+0x22/0x50 [ 25.165357] __kasan_record_aux_stack+0x8e/0xa0 [ 25.165926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.166571] remove_vma+0x139/0x170 [ 25.167016] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.167570] do_vmi_munmap+0x1f1/0x2b0 [ 25.168118] __vm_munmap+0x138/0x3a0 [ 25.168579] __x64_sys_munmap+0x59/0x80 [ 25.169074] do_syscall_64+0x3f/0x90 [ 25.169540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.170175] [ 25.170387] Second to last potentially related work creation: [ 25.171069] kasan_save_stack+0x22/0x50 [ 25.171570] __kasan_record_aux_stack+0x8e/0xa0 [ 25.172148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.172782] remove_vma+0x139/0x170 [ 25.173230] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.173787] do_vmi_munmap+0x1f1/0x2b0 [ 25.174266] mmap_region+0x1f9/0x2660 [ 25.174741] do_mmap+0x854/0xf00 [ 25.175165] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.175647] ksys_mmap_pgoff+0x3af/0x500 [ 25.176161] do_syscall_64+0x3f/0x90 [ 25.176631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.177269] [ 25.177484] The buggy address belongs to the object at ffff88800e3e7740 [ 25.177484] which belongs to the cache vm_area_struct of size 168 [ 25.178934] The buggy address is located 88 bytes inside of [ 25.178934] freed 168-byte region [ffff88800e3e7740, ffff88800e3e77e8) [ 25.180333] [ 25.180546] The buggy address belongs to the physical page: [ 25.181200] page:0000000088a4f958 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3e7 [ 25.182269] memcg:ffff88800e620201 [ 25.182696] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.183399] page_type: 0xffffffff() [ 25.183841] raw: 0100000000000200 ffff88800879fc80 ffffea00003b35c0 dead000000000007 [ 25.184760] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e620201 [ 25.185664] page dumped because: kasan: bad access detected [ 25.186320] [ 25.186532] Memory state around the buggy address: [ 25.187112] ffff88800e3e7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.187972] ffff88800e3e7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 25.188818] >ffff88800e3e7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 25.189664] ^ [ 25.190154] ffff88800e3e7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 25.191008] ffff88800e3e7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 25.191847] ================================================================== [ 25.192840] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.099925] BUG: Bad rss-counter state mm:00000000200a67ba type:MM_FILEPAGES val:33 [ 27.100664] BUG: Bad rss-counter state mm:00000000200a67ba type:MM_ANONPAGES val:22 [ 27.635432] BUG: Bad rss-counter state mm:00000000d67520df type:MM_FILEPAGES val:33 [ 27.636634] BUG: Bad rss-counter state mm:00000000d67520df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7380' (ECDSA) to the list of known hosts. 2023/06/19 18:26:59 fuzzer started 2023/06/19 18:26:59 dialing manager at localhost:44161 2023/06/19 18:26:59 checking machine... 2023/06/19 18:26:59 checking revisions... [ 28.296553] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:26:59 testing simple program... [ 28.337171] cgroup: Unknown subsys name 'net' [ 28.391737] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:26:58 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff88801461ba74 RBP=ffff88801461b680 RSP=ffff8880145d7448 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801461b680 R13=0000000000000000 R14=ffffffff85652a88 R15=1ffff110028baf1d RIP=ffffffff813744bd 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 00007f89d611a900 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=00007f89d555ae30 CR3=000000000d50e000 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=5ba49c90046891b3f74dc2da206d88a0 XMM02=00000000001205a8eff9b2d0a8fce9cb XMM03=00000000001206782c67c8bc2e329bc3 XMM04=43bc8adf7c411b6900000000000ae988 XMM05=7bb65ec67dd975ee0000000000136460 XMM06=4fda316b135da52b0000000000134ee0 XMM07=fb795ef6d657705600000000001242c0 XMM08=2c67c8bc2e329bc30000000000120618 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000020c48 RBX=0000000000000001 RCX=ffffffff81807eba RDX=0000000000020c49 RSI=000000000000807e RDI=00000000000624d8 RBP=ffff88800b9e7840 RSP=ffff88800b9e7778 R8 =ffffffff86136d7c R9 =ffff88800b9e7828 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800b9e7848 R13=ffff88800b9e7830 R14=ffff88800b9e7829 R15=ffff88800b9e77e8 RIP=ffffffff81130853 RFL=00000283 [--S---C] 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 00007fe38e2f7900 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=00007ffd8e700000 CR3=000000001a1aa000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000