[ 31.444943] BUG: Bad rss-counter state mm:00000000d20afdd8 type:MM_FILEPAGES val:33 [ 31.446923] BUG: Bad rss-counter state mm:00000000d20afdd8 type:MM_ANONPAGES val:22 [ 31.607105] ================================================================== [ 31.608022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.608976] Read of size 8 at addr ffff88801a7675c8 by task sshd/219 [ 31.609733] [ 31.610019] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.610906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.611879] Call Trace: [ 31.612220] [ 31.612511] dump_stack_lvl+0x91/0xf0 [ 31.613009] print_report+0xcc/0x620 [ 31.613498] ? __virt_addr_valid+0x102/0x340 [ 31.614053] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.614670] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.615284] kasan_report+0xbe/0xf0 [ 31.615761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.616375] vma_interval_tree_remove+0xc75/0xec0 [ 31.616990] vma_prepare+0xc54/0x11a0 [ 31.617468] __split_vma+0x5af/0x950 [ 31.617944] ? __pfx___split_vma+0x10/0x10 [ 31.618470] ? find_held_lock+0x2c/0x110 [ 31.619001] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.619564] ? lock_is_held_type+0x9f/0x120 [ 31.620104] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.620730] ? mtree_range_walk+0x632/0x900 [ 31.621306] ? mas_walk+0x5c7/0x7c0 [ 31.621784] do_vmi_munmap+0x1f1/0x2b0 [ 31.622279] mmap_region+0x1f9/0x2660 [ 31.622767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.623281] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.623997] ? __pfx_lock_acquire+0x10/0x10 [ 31.624529] ? __pfx_mmap_region+0x10/0x10 [ 31.625067] ? security_mmap_addr+0x7d/0xa0 [ 31.625602] ? get_unmapped_area+0x1f5/0x3f0 [ 31.626156] do_mmap+0x854/0xf00 [ 31.626590] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.627085] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.627643] ksys_mmap_pgoff+0x3af/0x500 [ 31.628143] do_syscall_64+0x3f/0x90 [ 31.628622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.629294] RIP: 0033:0x7fdde81ddd82 [ 31.629754] 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 [ 31.631860] RSP: 002b:00007ffffd44dd48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.632770] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdde81ddd82 [ 31.633611] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdde7617000 [ 31.634446] RBP: 00007fdde7617000 R08: 0000000000000009 R09: 0000000000001000 [ 31.635288] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a842d9ec0 [ 31.636123] R13: 00007ffffd44dd60 R14: 00007ffffd44dd90 R15: 00007ffffd44e0f0 [ 31.636983] [ 31.637272] [ 31.637488] Allocated by task 208: [ 31.637912] kasan_save_stack+0x22/0x50 [ 31.638414] kasan_set_track+0x25/0x30 [ 31.638914] __kasan_slab_alloc+0x59/0x70 [ 31.639444] kmem_cache_alloc+0x16b/0x370 [ 31.639959] vm_area_dup+0x20/0x160 [ 31.640411] __split_vma+0x170/0x950 [ 31.640890] split_vma+0xc6/0x110 [ 31.641327] mprotect_fixup+0x8d2/0xb30 [ 31.641823] do_mprotect_pkey+0x87e/0xd40 [ 31.642339] __x64_sys_mprotect+0x78/0xc0 [ 31.642852] do_syscall_64+0x3f/0x90 [ 31.643324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.643960] [ 31.644175] Freed by task 208: [ 31.644563] kasan_save_stack+0x22/0x50 [ 31.645086] kasan_set_track+0x25/0x30 [ 31.645584] kasan_save_free_info+0x2b/0x50 [ 31.646113] __kasan_slab_free+0x10a/0x190 [ 31.646643] kmem_cache_free+0x10d/0x4d0 [ 31.647159] rcu_core+0x8c8/0x2860 [ 31.647608] __do_softirq+0x1b7/0x7d4 [ 31.648089] [ 31.648305] Last potentially related work creation: [ 31.648905] kasan_save_stack+0x22/0x50 [ 31.649407] __kasan_record_aux_stack+0x8e/0xa0 [ 31.649983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.650615] remove_vma+0x139/0x170 [ 31.651070] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.651626] do_vmi_munmap+0x1f1/0x2b0 [ 31.652115] __vm_munmap+0x138/0x3a0 [ 31.652580] __x64_sys_munmap+0x59/0x80 [ 31.653083] do_syscall_64+0x3f/0x90 [ 31.653558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.654200] [ 31.654415] The buggy address belongs to the object at ffff88801a767570 [ 31.654415] which belongs to the cache vm_area_struct of size 168 [ 31.655870] The buggy address is located 88 bytes inside of [ 31.655870] freed 168-byte region [ffff88801a767570, ffff88801a767618) [ 31.657279] [ 31.657497] The buggy address belongs to the physical page: [ 31.658155] page:000000002ab77697 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a767 [ 31.659232] memcg:ffff88801a732b01 [ 31.659652] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.660302] page_type: 0xffffffff() [ 31.660770] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.661679] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a732b01 [ 31.662580] page dumped because: kasan: bad access detected [ 31.663254] [ 31.663476] Memory state around the buggy address: [ 31.664062] ffff88801a767480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.664925] ffff88801a767500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.665791] >ffff88801a767580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.666650] ^ [ 31.667334] ffff88801a767600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.668210] ffff88801a767680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.669096] ================================================================== [ 31.670093] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.899128] BUG: Bad rss-counter state mm:0000000014da24ac type:MM_FILEPAGES val:33 [ 33.900266] BUG: Bad rss-counter state mm:0000000014da24ac type:MM_ANONPAGES val:22 [ 34.346598] BUG: Bad rss-counter state mm:000000006be66075 type:MM_FILEPAGES val:33 [ 34.347886] BUG: Bad rss-counter state mm:000000006be66075 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58751' (ECDSA) to the list of known hosts. 2023/06/21 05:15:21 fuzzer started 2023/06/21 05:15:22 dialing manager at localhost:36067 2023/06/21 05:15:22 checking machine... 2023/06/21 05:15:22 checking revisions... [ 35.063107] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:15:22 testing simple program... [ 35.113454] cgroup: Unknown subsys name 'net' [ 35.166713] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:15:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800daefe70 RCX=ffffffff82168420 RDX=ffff8880145b1b40 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000000006007 RSP=ffff88800daefae8 R8 =0000000000000006 R9 =000055d8cba83a20 R10=000055d8cba89a27 R11=0000000000000000 R12=000055d8cba83a20 R13=0000000000000000 R14=000055d8cba89a27 R15=0000000000000000 RIP=ffffffff814c0860 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 00007fa5312a1900 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=00007f3e9f5f1650 CR3=000000000d75e000 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=d2c0dbb89eedd8b4434fc5d5d59d1507 XMM02=eff9b2d0a8fce9cb000000000011aea8 XMM03=2c67c8bc2e329bc3000000000011afd0 XMM04=e6807eb97454a0c200000000000ae988 XMM05=40f0e3afa0c9acf600000000001329a8 XMM06=806171799158d9670000000000131428 XMM07=fb795ef6d65770560000000000120d68 XMM08=2c67c8bc2e329bc3000000000011afd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8180b005 RDX=00000000000080b0 RSI=00000000000080b0 RDI=ffffffff86509cb0 RBP=ffff8880101972b0 RSP=ffff8880101971e8 R8 =0000000000000000 R9 =ffff888010197298 R10=0000000000038001 R11=0000000000020d03 R12=ffff8880101972b8 R13=ffff8880101972a0 R14=ffff888010197299 R15=ffff888010197258 RIP=ffffffff811307c2 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 00007f3e9f03c900 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=00007f3e9f5f3618 CR3=000000000f674000 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