[ 24.307392] BUG: Bad rss-counter state mm:00000000160a2975 type:MM_FILEPAGES val:33 [ 24.308723] BUG: Bad rss-counter state mm:00000000160a2975 type:MM_ANONPAGES val:22 [ 24.344788] ================================================================== [ 24.345612] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.346452] Read of size 8 at addr ffff88800e684ed8 by task sshd/219 [ 24.347136] [ 24.347328] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.348103] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.348978] Call Trace: [ 24.349270] [ 24.349534] dump_stack_lvl+0x91/0xf0 [ 24.349975] print_report+0xcc/0x620 [ 24.350411] ? __virt_addr_valid+0x102/0x340 [ 24.350911] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.351458] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.352009] kasan_report+0xbe/0xf0 [ 24.352429] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.352986] vma_interval_tree_remove+0xc75/0xec0 [ 24.353572] vma_prepare+0xc54/0x11a0 [ 24.354008] __split_vma+0x5af/0x950 [ 24.354436] ? __pfx___split_vma+0x10/0x10 [ 24.354927] ? find_held_lock+0x2c/0x110 [ 24.355401] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.355935] ? lock_is_held_type+0x9f/0x120 [ 24.356432] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.356984] ? mtree_range_walk+0x632/0x900 [ 24.357510] ? mas_walk+0x5c7/0x7c0 [ 24.357952] do_vmi_munmap+0x1f1/0x2b0 [ 24.358409] mmap_region+0x1f9/0x2660 [ 24.358843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.359318] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.359967] ? __pfx_lock_acquire+0x10/0x10 [ 24.360450] ? __pfx_mmap_region+0x10/0x10 [ 24.360932] ? security_mmap_addr+0x7d/0xa0 [ 24.361422] ? get_unmapped_area+0x1f5/0x3f0 [ 24.361918] do_mmap+0x854/0xf00 [ 24.362306] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.362753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.363267] ksys_mmap_pgoff+0x3af/0x500 [ 24.363717] do_syscall_64+0x3f/0x90 [ 24.364136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.364707] RIP: 0033:0x7f39c8815d82 [ 24.365115] 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 [ 24.367006] RSP: 002b:00007ffc7eac99d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.367849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39c8815d82 [ 24.368619] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39c7c4f000 [ 24.369415] RBP: 00007f39c7c4f000 R08: 0000000000000009 R09: 0000000000001000 [ 24.370185] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a20c95b20 [ 24.370966] R13: 00007ffc7eac99f0 R14: 00007ffc7eac9a20 R15: 00007ffc7eac9d80 [ 24.371750] [ 24.372017] [ 24.372212] Allocated by task 211: [ 24.372610] kasan_save_stack+0x22/0x50 [ 24.373149] kasan_set_track+0x25/0x30 [ 24.373612] __kasan_slab_alloc+0x59/0x70 [ 24.374083] kmem_cache_alloc+0x16b/0x370 [ 24.374553] vm_area_dup+0x20/0x160 [ 24.374965] __split_vma+0x170/0x950 [ 24.375394] split_vma+0xc6/0x110 [ 24.375795] mprotect_fixup+0x8d2/0xb30 [ 24.376259] do_mprotect_pkey+0x87e/0xd40 [ 24.376741] __x64_sys_mprotect+0x78/0xc0 [ 24.377212] do_syscall_64+0x3f/0x90 [ 24.377656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.378242] [ 24.378441] Freed by task 203: [ 24.378796] kasan_save_stack+0x22/0x50 [ 24.379253] kasan_set_track+0x25/0x30 [ 24.379712] kasan_save_free_info+0x2b/0x50 [ 24.380196] __kasan_slab_free+0x10a/0x190 [ 24.380679] kmem_cache_free+0x10d/0x4d0 [ 24.381148] rcu_core+0x8c8/0x2860 [ 24.381573] __do_softirq+0x1b7/0x7d4 [ 24.382009] [ 24.382205] Last potentially related work creation: [ 24.382740] kasan_save_stack+0x22/0x50 [ 24.383198] __kasan_record_aux_stack+0x8e/0xa0 [ 24.383734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.384313] remove_vma+0x139/0x170 [ 24.384714] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.385198] do_vmi_munmap+0x1f1/0x2b0 [ 24.385632] __vm_munmap+0x138/0x3a0 [ 24.386036] __x64_sys_munmap+0x59/0x80 [ 24.386471] do_syscall_64+0x3f/0x90 [ 24.386891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.387446] [ 24.387638] The buggy address belongs to the object at ffff88800e684e80 [ 24.387638] which belongs to the cache vm_area_struct of size 168 [ 24.388911] The buggy address is located 88 bytes inside of [ 24.388911] freed 168-byte region [ffff88800e684e80, ffff88800e684f28) [ 24.390143] [ 24.390328] The buggy address belongs to the physical page: [ 24.390904] page:000000008410416e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe684 [ 24.391854] memcg:ffff88800cb24001 [ 24.392224] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.392802] page_type: 0xffffffff() [ 24.393193] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.394015] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb24001 [ 24.394812] page dumped because: kasan: bad access detected [ 24.395394] [ 24.395581] Memory state around the buggy address: [ 24.396082] ffff88800e684d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.396823] ffff88800e684e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.397580] >ffff88800e684e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.398318] ^ [ 24.398956] ffff88800e684f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.399701] ffff88800e684f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.400454] ================================================================== [ 24.401497] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.112801] BUG: Bad rss-counter state mm:0000000052cf5eb2 type:MM_FILEPAGES val:33 [ 26.113983] BUG: Bad rss-counter state mm:0000000052cf5eb2 type:MM_ANONPAGES val:22 [ 26.515044] BUG: Bad rss-counter state mm:0000000070066dd6 type:MM_FILEPAGES val:33 [ 26.516242] BUG: Bad rss-counter state mm:0000000070066dd6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18069' (ECDSA) to the list of known hosts. 2023/06/20 17:21:59 fuzzer started 2023/06/20 17:21:59 dialing manager at localhost:36067 2023/06/20 17:21:59 checking machine... 2023/06/20 17:21:59 checking revisions... [ 27.257908] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:21:59 testing simple program... [ 27.299566] cgroup: Unknown subsys name 'net' [ 27.343900] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:21:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe90ced538 CR3=0000000005482000 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=00007f5aaeffd51000005652b41f3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110018a2c13 RBX=ffff88800c516068 RCX=1ffff11001afdbdc RDX=dffffc0000000000 RSI=ffff8880165770e8 RDI=ffff88800c516098 RBP=ffff8880145921a8 RSP=ffff8880194676b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888016577000 R13=0000000000000000 R14=ffff888016576d58 R15=ffff888016576d10 RIP=ffffffff8184767e RFL=00000046 [---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 00007fa835d8c900 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=00007fa836343618 CR3=0000000016f62000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000