[ 85.421819] BUG: Bad rss-counter state mm:000000002734326b type:MM_FILEPAGES val:33 [ 85.423229] BUG: Bad rss-counter state mm:000000002734326b type:MM_ANONPAGES val:22 [ 85.583340] ================================================================== [ 85.584299] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 85.585256] Read of size 8 at addr ffff888015c97140 by task sshd/226 [ 85.586153] [ 85.586372] CPU: 0 PID: 226 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 85.587425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 85.588404] Call Trace: [ 85.588726] [ 85.589012] dump_stack_lvl+0x91/0xf0 [ 85.589504] print_report+0xcc/0x620 [ 85.590010] ? __virt_addr_valid+0x102/0x340 [ 85.590577] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.591209] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.591837] kasan_report+0xbe/0xf0 [ 85.592316] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.592938] vma_interval_tree_remove+0xc75/0xec0 [ 85.593547] vma_prepare+0xc54/0x11a0 [ 85.594033] __split_vma+0x5af/0x950 [ 85.594516] ? __pfx___split_vma+0x10/0x10 [ 85.595070] ? find_held_lock+0x2c/0x110 [ 85.595595] do_vmi_align_munmap+0x2ba/0x11f0 [ 85.596172] ? lock_is_held_type+0x9f/0x120 [ 85.596722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 85.597338] ? mtree_range_walk+0x632/0x900 [ 85.597892] ? mas_walk+0x5c7/0x7c0 [ 85.598367] do_vmi_munmap+0x1f1/0x2b0 [ 85.598872] mmap_region+0x1f9/0x2660 [ 85.599376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 85.599890] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 85.600603] ? __pfx_lock_acquire+0x10/0x10 [ 85.601143] ? __pfx_mmap_region+0x10/0x10 [ 85.601679] ? security_mmap_addr+0x7d/0xa0 [ 85.602213] ? get_unmapped_area+0x1f5/0x3f0 [ 85.602775] do_mmap+0x854/0xf00 [ 85.603241] vm_mmap_pgoff+0x1a6/0x3a0 [ 85.603741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 85.604308] ksys_mmap_pgoff+0x3af/0x500 [ 85.604817] do_syscall_64+0x3f/0x90 [ 85.605303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.605951] RIP: 0033:0x7f6a40b27d82 [ 85.606409] 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 [ 85.608564] RSP: 002b:00007fffb7c9b598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 85.609490] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a40b27d82 [ 85.610346] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a3ff61000 [ 85.611224] RBP: 00007f6a3ff61000 R08: 0000000000000009 R09: 0000000000001000 [ 85.612072] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a60ea4ec0 [ 85.612920] R13: 00007fffb7c9b5b0 R14: 00007fffb7c9b5e0 R15: 00007fffb7c9b940 [ 85.613785] [ 85.614082] [ 85.614299] Allocated by task 213: [ 85.614735] kasan_save_stack+0x22/0x50 [ 85.615264] kasan_set_track+0x25/0x30 [ 85.615769] __kasan_slab_alloc+0x59/0x70 [ 85.616296] kmem_cache_alloc+0x16b/0x370 [ 85.616817] vm_area_dup+0x20/0x160 [ 85.617277] __split_vma+0x170/0x950 [ 85.617751] split_vma+0xc6/0x110 [ 85.618194] mprotect_fixup+0x8d2/0xb30 [ 85.618704] do_mprotect_pkey+0x87e/0xd40 [ 85.619252] __x64_sys_mprotect+0x78/0xc0 [ 85.619775] do_syscall_64+0x3f/0x90 [ 85.620260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.620922] [ 85.621139] Freed by task 213: [ 85.621532] kasan_save_stack+0x22/0x50 [ 85.622041] kasan_set_track+0x25/0x30 [ 85.622551] kasan_save_free_info+0x2b/0x50 [ 85.623099] __kasan_slab_free+0x10a/0x190 [ 85.623639] kmem_cache_free+0x10d/0x4d0 [ 85.624152] rcu_core+0x8c8/0x2860 [ 85.624601] __do_softirq+0x1b7/0x7d4 [ 85.625079] [ 85.625296] Last potentially related work creation: [ 85.625906] kasan_save_stack+0x22/0x50 [ 85.626414] __kasan_record_aux_stack+0x8e/0xa0 [ 85.627032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 85.627703] remove_vma+0x139/0x170 [ 85.628163] do_vmi_align_munmap+0xd4a/0x11f0 [ 85.628733] do_vmi_munmap+0x1f1/0x2b0 [ 85.629235] __vm_munmap+0x138/0x3a0 [ 85.629716] __x64_sys_munmap+0x59/0x80 [ 85.630223] do_syscall_64+0x3f/0x90 [ 85.630714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.631383] [ 85.631601] The buggy address belongs to the object at ffff888015c970e8 [ 85.631601] which belongs to the cache vm_area_struct of size 168 [ 85.633128] The buggy address is located 88 bytes inside of [ 85.633128] freed 168-byte region [ffff888015c970e8, ffff888015c97190) [ 85.634568] [ 85.634784] The buggy address belongs to the physical page: [ 85.635466] page:0000000023d9d74c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c97 [ 85.636568] memcg:ffff88800eae0c01 [ 85.636999] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 85.637705] page_type: 0xffffffff() [ 85.638162] raw: 0100000000000200 ffff88800879fc80 ffffea00003e0180 dead000000000007 [ 85.639120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eae0c01 [ 85.640043] page dumped because: kasan: bad access detected [ 85.640713] [ 85.640932] Memory state around the buggy address: [ 85.641515] ffff888015c97000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 85.642383] ffff888015c97080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 85.643276] >ffff888015c97100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 85.644142] ^ [ 85.644789] ffff888015c97180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 85.645663] ffff888015c97200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 85.646532] ================================================================== [ 85.647521] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 87.619673] BUG: Bad rss-counter state mm:00000000fd61e953 type:MM_FILEPAGES val:33 [ 87.620959] BUG: Bad rss-counter state mm:00000000fd61e953 type:MM_ANONPAGES val:22 [ 88.185600] BUG: Bad rss-counter state mm:00000000eacc0f0a type:MM_FILEPAGES val:33 [ 88.186788] BUG: Bad rss-counter state mm:00000000eacc0f0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61339' (ECDSA) to the list of known hosts. 2023/06/20 05:13:12 fuzzer started 2023/06/20 05:13:12 dialing manager at localhost:44161 2023/06/20 05:13:12 checking machine... 2023/06/20 05:13:12 checking revisions... [ 88.831730] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:13:12 testing simple program... [ 88.893016] cgroup: Unknown subsys name 'net' [ 88.936376] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:12:17 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=00007ff8f7fd3880 CR3=000000000d822000 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=8e0f0819c859af9ee64a1de93c1482a3 XMM02=0000000000129eb8eff9b2d0a8fce9cb XMM03=0000000000129f882c67c8bc2e329bc3 XMM04=83c2f6c6198f26bd00000000000ae988 XMM05=6860aeb314f8829d000000000013ff70 XMM06=09b2da48a87f35ce000000000013f148 XMM07=e042d86d42eb936e0000000000130b50 XMM08=0b869260dfaff38a0000000000129f88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a78 RCX=ffff88800d7e8000 RDX=1ffff1100d9e1351 RSI=0000000000000001 RDI=ffff88806cf09a88 RBP=ffff88800d7e7520 RSP=ffff88806cf099d0 R8 =0000000000000000 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b523e R12=0000000000000008 R13=ffff88800d7e0000 R14=ffff88800d7e7528 R15=ffff88806cf09a78 RIP=ffffffff81130516 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 00007f0edcad8900 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=00007ffe112d8000 CR3=0000000016a0e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000