[ 24.120006] BUG: Bad rss-counter state mm:0000000087eaf835 type:MM_FILEPAGES val:33 [ 24.120814] BUG: Bad rss-counter state mm:0000000087eaf835 type:MM_ANONPAGES val:22 [ 24.268847] ================================================================== [ 24.269961] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.271072] Read of size 8 at addr ffff88800fbbd058 by task sshd/220 [ 24.272059] [ 24.272315] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.273181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.274154] Call Trace: [ 24.274488] [ 24.274775] dump_stack_lvl+0x91/0xf0 [ 24.275273] print_report+0xcc/0x620 [ 24.275756] ? __virt_addr_valid+0x102/0x340 [ 24.276324] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.276947] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.277568] kasan_report+0xbe/0xf0 [ 24.278050] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.278668] vma_interval_tree_remove+0xc75/0xec0 [ 24.279280] vma_prepare+0xc54/0x11a0 [ 24.279757] __split_vma+0x5af/0x950 [ 24.280227] ? __pfx___split_vma+0x10/0x10 [ 24.280751] ? find_held_lock+0x2c/0x110 [ 24.281291] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.281854] ? lock_is_held_type+0x9f/0x120 [ 24.282392] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.283010] ? mtree_range_walk+0x632/0x900 [ 24.283568] ? mas_walk+0x5c7/0x7c0 [ 24.284051] do_vmi_munmap+0x1f1/0x2b0 [ 24.284542] mmap_region+0x1f9/0x2660 [ 24.285025] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.285543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.286264] ? __pfx_lock_acquire+0x10/0x10 [ 24.286799] ? __pfx_mmap_region+0x10/0x10 [ 24.287328] ? security_mmap_addr+0x7d/0xa0 [ 24.287860] ? get_unmapped_area+0x1f5/0x3f0 [ 24.288408] do_mmap+0x854/0xf00 [ 24.288850] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.289366] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.289930] ksys_mmap_pgoff+0x3af/0x500 [ 24.290440] do_syscall_64+0x3f/0x90 [ 24.290914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.291560] RIP: 0033:0x7f3173009d82 [ 24.292022] 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 [ 24.294167] RSP: 002b:00007ffe8d4c6ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.295083] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3173009d82 [ 24.295944] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3172443000 [ 24.296796] RBP: 00007f3172443000 R08: 0000000000000009 R09: 0000000000001000 [ 24.297649] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557103586f70 [ 24.298491] R13: 00007ffe8d4c6ec0 R14: 00007ffe8d4c6ef0 R15: 00007ffe8d4c7250 [ 24.299346] [ 24.299637] [ 24.299852] Allocated by task 212: [ 24.300279] kasan_save_stack+0x22/0x50 [ 24.300785] kasan_set_track+0x25/0x30 [ 24.301299] __kasan_slab_alloc+0x59/0x70 [ 24.301826] kmem_cache_alloc+0x16b/0x370 [ 24.302345] vm_area_dup+0x20/0x160 [ 24.302807] __split_vma+0x170/0x950 [ 24.303270] split_vma+0xc6/0x110 [ 24.303711] mprotect_fixup+0x8d2/0xb30 [ 24.304213] do_mprotect_pkey+0x87e/0xd40 [ 24.304739] __x64_sys_mprotect+0x78/0xc0 [ 24.305274] do_syscall_64+0x3f/0x90 [ 24.305747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.306395] [ 24.306611] Freed by task 212: [ 24.307002] kasan_save_stack+0x22/0x50 [ 24.307508] kasan_set_track+0x25/0x30 [ 24.308008] kasan_save_free_info+0x2b/0x50 [ 24.308539] __kasan_slab_free+0x10a/0x190 [ 24.309071] kmem_cache_free+0x10d/0x4d0 [ 24.309599] rcu_core+0x8c8/0x2860 [ 24.310043] __do_softirq+0x1b7/0x7d4 [ 24.310529] [ 24.310744] Last potentially related work creation: [ 24.311342] kasan_save_stack+0x22/0x50 [ 24.311847] __kasan_record_aux_stack+0x8e/0xa0 [ 24.312431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.313180] remove_vma+0x139/0x170 [ 24.313646] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.314217] do_vmi_munmap+0x1f1/0x2b0 [ 24.314707] __vm_munmap+0x138/0x3a0 [ 24.315174] __x64_sys_munmap+0x59/0x80 [ 24.315675] do_syscall_64+0x3f/0x90 [ 24.316166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.316813] [ 24.317031] Second to last potentially related work creation: [ 24.317748] kasan_save_stack+0x22/0x50 [ 24.318253] __kasan_record_aux_stack+0x8e/0xa0 [ 24.318827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.319471] remove_vma+0x139/0x170 [ 24.319925] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.320482] do_vmi_munmap+0x1f1/0x2b0 [ 24.320969] mmap_region+0x1f9/0x2660 [ 24.321457] do_mmap+0x854/0xf00 [ 24.321890] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.322374] ksys_mmap_pgoff+0x3af/0x500 [ 24.322879] do_syscall_64+0x3f/0x90 [ 24.323349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.323986] [ 24.324199] The buggy address belongs to the object at ffff88800fbbd000 [ 24.324199] which belongs to the cache vm_area_struct of size 168 [ 24.325673] The buggy address is located 88 bytes inside of [ 24.325673] freed 168-byte region [ffff88800fbbd000, ffff88800fbbd0a8) [ 24.327078] [ 24.327291] The buggy address belongs to the physical page: [ 24.327951] page:000000009d29a8b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbbd [ 24.329038] memcg:ffff88800e2a9c01 [ 24.329486] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.330140] page_type: 0xffffffff() [ 24.330593] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 24.331512] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2a9c01 [ 24.332418] page dumped because: kasan: bad access detected [ 24.333078] [ 24.333306] Memory state around the buggy address: [ 24.333887] ffff88800fbbcf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 24.334755] ffff88800fbbcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.335626] >ffff88800fbbd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.336480] ^ [ 24.337230] ffff88800fbbd080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.338078] ffff88800fbbd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.338934] ================================================================== [ 24.339843] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.343628] BUG: Bad rss-counter state mm:00000000f0834806 type:MM_FILEPAGES val:33 [ 26.345028] BUG: Bad rss-counter state mm:00000000f0834806 type:MM_ANONPAGES val:22 [ 26.814112] BUG: Bad rss-counter state mm:00000000902a220c type:MM_FILEPAGES val:33 [ 26.815112] BUG: Bad rss-counter state mm:00000000902a220c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60752' (ECDSA) to the list of known hosts. 2023/06/19 22:50:25 fuzzer started 2023/06/19 22:50:25 dialing manager at localhost:44161 2023/06/19 22:50:25 checking machine... 2023/06/19 22:50:25 checking revisions... [ 27.530818] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:50:25 testing simple program... [ 27.571473] cgroup: Unknown subsys name 'net' [ 27.609799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:50:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=0000000000000100 RDX=ffff88800b8551c0 RSI=ffffffff814c83f1 RDI=ffff88800b8555b4 RBP=00007fca88d7a477 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007fca88d7a477 R13=0000000000000000 R14=ffff88800b8551c0 R15=ffff88800e080f80 RIP=ffffffff84532a40 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 00007fca88887900 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=00007fca88e3f0b0 CR3=000000001464c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffe8b9b9818 CR3=000000000e81e000 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=2035323a30353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000