[ 25.746761] BUG: Bad rss-counter state mm:0000000030b87c17 type:MM_FILEPAGES val:33 [ 25.747500] BUG: Bad rss-counter state mm:0000000030b87c17 type:MM_ANONPAGES val:22 [ 25.858209] ================================================================== [ 25.859012] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.859806] Read of size 8 at addr ffff888018e385c8 by task sshd/221 [ 25.860473] [ 25.860673] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.861417] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.862418] Call Trace: [ 25.862674] [ 25.862901] dump_stack_lvl+0x91/0xf0 [ 25.863303] print_report+0xcc/0x620 [ 25.863695] ? __virt_addr_valid+0x102/0x340 [ 25.864159] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.864684] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.865133] kasan_report+0xbe/0xf0 [ 25.865405] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.865757] vma_interval_tree_remove+0xc75/0xec0 [ 25.866100] vma_prepare+0xc54/0x11a0 [ 25.866382] __split_vma+0x5af/0x950 [ 25.866652] ? __pfx___split_vma+0x10/0x10 [ 25.866961] ? find_held_lock+0x2c/0x110 [ 25.867275] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.867610] ? lock_is_held_type+0x9f/0x120 [ 25.867932] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.868303] ? mtree_range_walk+0x632/0x900 [ 25.868636] ? mas_walk+0x5c7/0x7c0 [ 25.868924] do_vmi_munmap+0x1f1/0x2b0 [ 25.869220] mmap_region+0x1f9/0x2660 [ 25.869503] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.869796] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.870220] ? __pfx_lock_acquire+0x10/0x10 [ 25.870527] ? __pfx_mmap_region+0x10/0x10 [ 25.870832] ? security_mmap_addr+0x7d/0xa0 [ 25.871138] ? get_unmapped_area+0x1f5/0x3f0 [ 25.871454] do_mmap+0x854/0xf00 [ 25.871702] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.871985] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.872320] ksys_mmap_pgoff+0x3af/0x500 [ 25.872624] do_syscall_64+0x3f/0x90 [ 25.872903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.873345] RIP: 0033:0x7f796839ed82 [ 25.873640] 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 [ 25.875140] RSP: 002b:00007ffe28306388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.875812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f796839ed82 [ 25.876447] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79677d8000 [ 25.877096] RBP: 00007f79677d8000 R08: 0000000000000009 R09: 0000000000001000 [ 25.877723] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562002272ec0 [ 25.878366] R13: 00007ffe283063a0 R14: 00007ffe283063d0 R15: 00007ffe28306730 [ 25.878994] [ 25.879215] [ 25.879374] Allocated by task 213: [ 25.879697] kasan_save_stack+0x22/0x50 [ 25.880071] kasan_set_track+0x25/0x30 [ 25.880436] __kasan_slab_alloc+0x59/0x70 [ 25.880864] kmem_cache_alloc+0x16b/0x370 [ 25.881256] vm_area_dup+0x20/0x160 [ 25.881593] __split_vma+0x170/0x950 [ 25.881949] split_vma+0xc6/0x110 [ 25.882284] mprotect_fixup+0x8d2/0xb30 [ 25.882665] do_mprotect_pkey+0x87e/0xd40 [ 25.883054] __x64_sys_mprotect+0x78/0xc0 [ 25.883424] do_syscall_64+0x3f/0x90 [ 25.883768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.884272] [ 25.884423] Freed by task 204: [ 25.884720] kasan_save_stack+0x22/0x50 [ 25.885076] kasan_set_track+0x25/0x30 [ 25.885456] kasan_save_free_info+0x2b/0x50 [ 25.885835] __kasan_slab_free+0x10a/0x190 [ 25.886215] kmem_cache_free+0x10d/0x4d0 [ 25.886580] rcu_core+0x8c8/0x2860 [ 25.886898] __do_softirq+0x1b7/0x7d4 [ 25.887249] [ 25.887402] Last potentially related work creation: [ 25.887812] kasan_save_stack+0x22/0x50 [ 25.888170] __kasan_record_aux_stack+0x8e/0xa0 [ 25.888569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.889039] remove_vma+0x139/0x170 [ 25.889368] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.889754] do_vmi_munmap+0x1f1/0x2b0 [ 25.890101] __vm_munmap+0x138/0x3a0 [ 25.890421] __x64_sys_munmap+0x59/0x80 [ 25.890788] do_syscall_64+0x3f/0x90 [ 25.891147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.891642] [ 25.891807] Second to last potentially related work creation: [ 25.892307] kasan_save_stack+0x22/0x50 [ 25.892698] __kasan_record_aux_stack+0x8e/0xa0 [ 25.893129] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.893611] remove_vma+0x139/0x170 [ 25.893936] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.894341] do_vmi_munmap+0x1f1/0x2b0 [ 25.894695] mmap_region+0x1f9/0x2660 [ 25.895052] do_mmap+0x854/0xf00 [ 25.895379] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.895734] ksys_mmap_pgoff+0x3af/0x500 [ 25.896099] do_syscall_64+0x3f/0x90 [ 25.896447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.896923] [ 25.897081] The buggy address belongs to the object at ffff888018e38570 [ 25.897081] which belongs to the cache vm_area_struct of size 168 [ 25.898152] The buggy address is located 88 bytes inside of [ 25.898152] freed 168-byte region [ffff888018e38570, ffff888018e38618) [ 25.899192] [ 25.899352] The buggy address belongs to the physical page: [ 25.899848] page:000000005e0f53f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e38 [ 25.900668] memcg:ffff888015c74201 [ 25.900973] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.901451] page_type: 0xffffffff() [ 25.901784] raw: 0100000000000200 ffff88800879fc80 ffffea0000576040 dead00000000000c [ 25.902472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c74201 [ 25.903262] page dumped because: kasan: bad access detected [ 25.903744] [ 25.903900] Memory state around the buggy address: [ 25.904331] ffff888018e38480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.904981] ffff888018e38500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 25.905625] >ffff888018e38580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.906270] ^ [ 25.906754] ffff888018e38600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 25.907385] ffff888018e38680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.908007] ================================================================== [ 25.908744] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.446562] BUG: Bad rss-counter state mm:0000000032ba2e77 type:MM_FILEPAGES val:33 [ 27.447219] BUG: Bad rss-counter state mm:0000000032ba2e77 type:MM_ANONPAGES val:22 [ 27.832211] BUG: Bad rss-counter state mm:000000007116d277 type:MM_FILEPAGES val:33 [ 27.833057] BUG: Bad rss-counter state mm:000000007116d277 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11938' (ECDSA) to the list of known hosts. 2023/06/20 08:11:12 fuzzer started 2023/06/20 08:11:12 dialing manager at localhost:44161 2023/06/20 08:11:12 checking machine... 2023/06/20 08:11:12 checking revisions... [ 28.463793] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:11:13 testing simple program... [ 28.505134] cgroup: Unknown subsys name 'net' [ 28.539011] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:11:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f6605769ab0 CR3=000000000c762000 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=4e765c12aaf20582de42d25e2d22f72e XMM02=000000000011c580eff9b2d0a8fce9cb XMM03=000000000011c6502c67c8bc2e329bc3 XMM04=cbec9e452272fe5c00000000000ae988 XMM05=19e9129bd510f2350000000000133c58 XMM06=4fda316b135da52b0000000000133ae0 XMM07=e042d86d42eb936e00000000001232f0 XMM08=892f2c8c31d88806000000000011c650 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801ca87760 RCX=0000000000000001 RDX=1ffff11003950eec RSI=ffffffff81741198 RDI=ffff88801ca8776c RBP=0000000000000009 RSP=ffff88801ca87678 R8 =0000000000000001 R9 =ffff88801ca876d8 R10=0000000000038001 R11=000000000001e456 R12=ffff88801ca87760 R13=0000000000000000 R14=ffff888006a80000 R15=ffff8880084c6140 RIP=ffffffff813ad4cf 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 00007fa54af43900 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=00007fa54af22020 CR3=00000000096e4000 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=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