[ 38.373164] BUG: Bad rss-counter state mm:0000000022dac4dc type:MM_FILEPAGES val:33 [ 38.374178] BUG: Bad rss-counter state mm:0000000022dac4dc type:MM_ANONPAGES val:22 [ 38.411705] ================================================================== [ 38.412752] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.413687] Read of size 8 at addr ffff88800d558b38 by task sshd/219 [ 38.414451] [ 38.414667] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.415518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.416502] Call Trace: [ 38.416827] [ 38.417122] dump_stack_lvl+0x91/0xf0 [ 38.417616] print_report+0xcc/0x620 [ 38.418098] ? __virt_addr_valid+0x102/0x340 [ 38.418644] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.419258] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.419889] kasan_report+0xbe/0xf0 [ 38.420371] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.420997] vma_interval_tree_remove+0xc75/0xec0 [ 38.421603] vma_prepare+0xc54/0x11a0 [ 38.422083] __split_vma+0x5af/0x950 [ 38.422557] ? __pfx___split_vma+0x10/0x10 [ 38.423092] ? find_held_lock+0x2c/0x110 [ 38.423718] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.424297] ? lock_is_held_type+0x9f/0x120 [ 38.424835] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.425457] ? mtree_range_walk+0x632/0x900 [ 38.426007] ? mas_walk+0x5c7/0x7c0 [ 38.426480] do_vmi_munmap+0x1f1/0x2b0 [ 38.426978] mmap_region+0x1f9/0x2660 [ 38.427463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.427986] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.428713] ? __pfx_lock_acquire+0x10/0x10 [ 38.429249] ? __pfx_mmap_region+0x10/0x10 [ 38.429783] ? security_mmap_addr+0x7d/0xa0 [ 38.430318] ? get_unmapped_area+0x1f5/0x3f0 [ 38.430867] do_mmap+0x854/0xf00 [ 38.431314] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.431832] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.432396] ksys_mmap_pgoff+0x3af/0x500 [ 38.432909] do_syscall_64+0x3f/0x90 [ 38.433387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.434033] RIP: 0033:0x7f543b145d82 [ 38.434491] 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 [ 38.436642] RSP: 002b:00007ffcb563ff48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.437552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f543b145d82 [ 38.438397] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f543a57f000 [ 38.439239] RBP: 00007f543a57f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.440104] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613bd351b20 [ 38.440941] R13: 00007ffcb563ff60 R14: 00007ffcb563ff90 R15: 00007ffcb56402f0 [ 38.441804] [ 38.442098] [ 38.442315] Allocated by task 212: [ 38.442742] kasan_save_stack+0x22/0x50 [ 38.443253] kasan_set_track+0x25/0x30 [ 38.443751] __kasan_slab_alloc+0x59/0x70 [ 38.444287] kmem_cache_alloc+0x16b/0x370 [ 38.444805] vm_area_dup+0x20/0x160 [ 38.445266] __split_vma+0x170/0x950 [ 38.445734] split_vma+0xc6/0x110 [ 38.446171] mprotect_fixup+0x8d2/0xb30 [ 38.446673] do_mprotect_pkey+0x87e/0xd40 [ 38.447203] __x64_sys_mprotect+0x78/0xc0 [ 38.447722] do_syscall_64+0x3f/0x90 [ 38.448213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.448862] [ 38.449077] Freed by task 212: [ 38.449475] kasan_save_stack+0x22/0x50 [ 38.449985] kasan_set_track+0x25/0x30 [ 38.450480] kasan_save_free_info+0x2b/0x50 [ 38.451014] __kasan_slab_free+0x10a/0x190 [ 38.451541] kmem_cache_free+0x10d/0x4d0 [ 38.452068] rcu_core+0x8c8/0x2860 [ 38.452516] __do_softirq+0x1b7/0x7d4 [ 38.452995] [ 38.453211] Last potentially related work creation: [ 38.453805] kasan_save_stack+0x22/0x50 [ 38.454308] __kasan_record_aux_stack+0x8e/0xa0 [ 38.454882] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.455526] remove_vma+0x139/0x170 [ 38.455998] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.456553] do_vmi_munmap+0x1f1/0x2b0 [ 38.457046] __vm_munmap+0x138/0x3a0 [ 38.457515] __x64_sys_munmap+0x59/0x80 [ 38.458017] do_syscall_64+0x3f/0x90 [ 38.458497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.459134] [ 38.459348] Second to last potentially related work creation: [ 38.460036] kasan_save_stack+0x22/0x50 [ 38.460540] __kasan_record_aux_stack+0x8e/0xa0 [ 38.461119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.461759] remove_vma+0x139/0x170 [ 38.462210] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.462772] do_vmi_munmap+0x1f1/0x2b0 [ 38.463254] mmap_region+0x1f9/0x2660 [ 38.463729] do_mmap+0x854/0xf00 [ 38.464186] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.464675] ksys_mmap_pgoff+0x3af/0x500 [ 38.465185] do_syscall_64+0x3f/0x90 [ 38.465659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.466304] [ 38.466520] The buggy address belongs to the object at ffff88800d558ae0 [ 38.466520] which belongs to the cache vm_area_struct of size 168 [ 38.467997] The buggy address is located 88 bytes inside of [ 38.467997] freed 168-byte region [ffff88800d558ae0, ffff88800d558b88) [ 38.469401] [ 38.469616] The buggy address belongs to the physical page: [ 38.470271] page:000000006d0fd5ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd558 [ 38.471368] memcg:ffff88800d579701 [ 38.471795] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.472462] page_type: 0xffffffff() [ 38.472928] raw: 0100000000000200 ffff88800879fc80 ffffea00002668c0 dead000000000002 [ 38.473875] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d579701 [ 38.474785] page dumped because: kasan: bad access detected [ 38.475446] [ 38.475663] Memory state around the buggy address: [ 38.476252] ffff88800d558a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.477105] ffff88800d558a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.477966] >ffff88800d558b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.478818] ^ [ 38.479433] ffff88800d558b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.480299] ffff88800d558c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.481158] ================================================================== [ 38.482353] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.328788] BUG: Bad rss-counter state mm:00000000f1c01822 type:MM_FILEPAGES val:33 [ 40.330018] BUG: Bad rss-counter state mm:00000000f1c01822 type:MM_ANONPAGES val:22 [ 40.791816] BUG: Bad rss-counter state mm:0000000089a1f8f4 type:MM_FILEPAGES val:33 [ 40.792848] BUG: Bad rss-counter state mm:0000000089a1f8f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2436' (ECDSA) to the list of known hosts. 2023/06/19 14:35:57 fuzzer started 2023/06/19 14:35:57 dialing manager at localhost:44161 2023/06/19 14:35:57 checking machine... 2023/06/19 14:35:57 checking revisions... [ 41.517078] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:35:57 testing simple program... [ 41.572533] cgroup: Unknown subsys name 'net' [ 41.612055] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:35:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055edda39a028 RCX=00000000000000e4 RDX=0000000000000001 RSI=0000000000000000 RDI=ffff888015ddffc8 RBP=000055edda3b4810 RSP=fffffe0000002ff8 R8 =000055edda3b4810 R9 =00007fff48616158 R10=000055edda3ba2c0 R11=0000000000000246 R12=0000000000000000 R13=0000000000000000 R14=00007fff4861d170 R15=00007fff4861cf20 RIP=ffffffff84601650 RFL=00000006 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe8783b3900 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=00007fe878f55968 CR3=000000000edde000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000126c15fe54 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000012 RSI=ffff88806cf28140 RDI=000000000005460a RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f1882 R11=ffff88806cf09ff8 R12=000000000005460a R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000016 [----AP-] 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=00007fe4f47096d0 CR3=00000000098f8000 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=2036353a35333a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a35333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000