[ 24.066493] BUG: Bad rss-counter state mm:00000000d723b51f type:MM_FILEPAGES val:33 [ 24.068213] BUG: Bad rss-counter state mm:00000000d723b51f type:MM_ANONPAGES val:22 [ 24.229807] ================================================================== [ 24.230950] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.232280] Read of size 8 at addr ffff88800e986df0 by task sshd/219 [ 24.233168] [ 24.233398] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.234351] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.235388] Call Trace: [ 24.235729] [ 24.236029] dump_stack_lvl+0x91/0xf0 [ 24.236550] print_report+0xcc/0x620 [ 24.237064] ? __virt_addr_valid+0x102/0x340 [ 24.237668] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.238321] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.238980] kasan_report+0xbe/0xf0 [ 24.239477] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.240139] vma_interval_tree_remove+0xc75/0xec0 [ 24.240786] vma_prepare+0xc54/0x11a0 [ 24.241305] __split_vma+0x5af/0x950 [ 24.241829] ? __pfx___split_vma+0x10/0x10 [ 24.242390] ? find_held_lock+0x2c/0x110 [ 24.242937] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.243545] ? lock_is_held_type+0x9f/0x120 [ 24.244114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.244758] ? mtree_range_walk+0x632/0x900 [ 24.245344] ? mas_walk+0x5c7/0x7c0 [ 24.245856] do_vmi_munmap+0x1f1/0x2b0 [ 24.246374] mmap_region+0x1f9/0x2660 [ 24.246884] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.247427] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.248187] ? __pfx_lock_acquire+0x10/0x10 [ 24.248750] ? __pfx_mmap_region+0x10/0x10 [ 24.249313] ? security_mmap_addr+0x7d/0xa0 [ 24.249899] ? get_unmapped_area+0x1f5/0x3f0 [ 24.250486] do_mmap+0x854/0xf00 [ 24.250952] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.251480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.252068] ksys_mmap_pgoff+0x3af/0x500 [ 24.252603] do_syscall_64+0x3f/0x90 [ 24.253113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.253828] RIP: 0033:0x7f140a1e6d82 [ 24.254291] 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 [ 24.256549] RSP: 002b:00007fff23152648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.257527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f140a1e6d82 [ 24.258433] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1409620000 [ 24.259329] RBP: 00007f1409620000 R08: 0000000000000009 R09: 0000000000001000 [ 24.260231] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6ed259ec0 [ 24.261135] R13: 00007fff23152660 R14: 00007fff23152690 R15: 00007fff231529f0 [ 24.262074] [ 24.262383] [ 24.262612] Allocated by task 212: [ 24.263065] kasan_save_stack+0x22/0x50 [ 24.263599] kasan_set_track+0x25/0x30 [ 24.264122] __kasan_slab_alloc+0x59/0x70 [ 24.264667] kmem_cache_alloc+0x16b/0x370 [ 24.265200] vm_area_dup+0x20/0x160 [ 24.265678] __split_vma+0x170/0x950 [ 24.266164] split_vma+0xc6/0x110 [ 24.266619] mprotect_fixup+0x8d2/0xb30 [ 24.267144] do_mprotect_pkey+0x87e/0xd40 [ 24.267687] __x64_sys_mprotect+0x78/0xc0 [ 24.268225] do_syscall_64+0x3f/0x90 [ 24.268714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.269389] [ 24.269631] Freed by task 212: [ 24.270034] kasan_save_stack+0x22/0x50 [ 24.270557] kasan_set_track+0x25/0x30 [ 24.271057] kasan_save_free_info+0x2b/0x50 [ 24.271603] __kasan_slab_free+0x10a/0x190 [ 24.272153] kmem_cache_free+0x10d/0x4d0 [ 24.272682] rcu_core+0x8c8/0x2860 [ 24.273201] __do_softirq+0x1b7/0x7d4 [ 24.273713] [ 24.273936] Last potentially related work creation: [ 24.274545] kasan_save_stack+0x22/0x50 [ 24.275067] __kasan_record_aux_stack+0x8e/0xa0 [ 24.275668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.276324] remove_vma+0x139/0x170 [ 24.276790] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.277366] do_vmi_munmap+0x1f1/0x2b0 [ 24.277896] __vm_munmap+0x138/0x3a0 [ 24.278380] __x64_sys_munmap+0x59/0x80 [ 24.278907] do_syscall_64+0x3f/0x90 [ 24.279394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.280061] [ 24.280280] Second to last potentially related work creation: [ 24.280991] kasan_save_stack+0x22/0x50 [ 24.281526] __kasan_record_aux_stack+0x8e/0xa0 [ 24.282119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.282784] remove_vma+0x139/0x170 [ 24.283250] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.283827] do_vmi_munmap+0x1f1/0x2b0 [ 24.284326] mmap_region+0x1f9/0x2660 [ 24.284824] do_mmap+0x854/0xf00 [ 24.285269] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.285782] ksys_mmap_pgoff+0x3af/0x500 [ 24.286302] do_syscall_64+0x3f/0x90 [ 24.286797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.287459] [ 24.287682] The buggy address belongs to the object at ffff88800e986d98 [ 24.287682] which belongs to the cache vm_area_struct of size 168 [ 24.289200] The buggy address is located 88 bytes inside of [ 24.289200] freed 168-byte region [ffff88800e986d98, ffff88800e986e40) [ 24.290673] [ 24.290893] The buggy address belongs to the physical page: [ 24.291577] page:00000000a1e4855e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe986 [ 24.292700] memcg:ffff88800e750201 [ 24.293145] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.293819] page_type: 0xffffffff() [ 24.294289] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aa880 dead000000000006 [ 24.295257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e750201 [ 24.296199] page dumped because: kasan: bad access detected [ 24.296884] [ 24.297107] Memory state around the buggy address: [ 24.297729] ffff88800e986c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.298628] ffff88800e986d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.299517] >ffff88800e986d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.300408] ^ [ 24.301243] ffff88800e986e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.302138] ffff88800e986e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.303020] ================================================================== [ 24.303994] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.664472] BUG: Bad rss-counter state mm:00000000f94fac7b type:MM_FILEPAGES val:33 [ 26.665516] BUG: Bad rss-counter state mm:00000000f94fac7b type:MM_ANONPAGES val:22 [ 27.225024] BUG: Bad rss-counter state mm:0000000004f8f5aa type:MM_FILEPAGES val:33 [ 27.226222] BUG: Bad rss-counter state mm:0000000004f8f5aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62496' (ECDSA) to the list of known hosts. 2023/06/20 23:21:19 fuzzer started 2023/06/20 23:21:19 dialing manager at localhost:36067 2023/06/20 23:21:19 checking machine... 2023/06/20 23:21:19 checking revisions... [ 27.914398] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:21:19 testing simple program... [ 27.976816] cgroup: Unknown subsys name 'net' [ 28.068924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:21:18 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=00000000f8c024ca RCX=ffff88806c412650 RDX=000000000000000b RSI=ffffffff8185af33 RDI=000000008506a642 RBP=ffff88800ccf5d60 RSP=ffff88800fe977c8 R8 =000000001abf005e R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000dc0 R14=ffff88800fe97830 R15=000000000000000b RIP=ffffffff82270500 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 00007fb10c422900 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=00007fb10c9da0b0 CR3=000000000dff0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000039500 RCX=0000000652cd5d76 RDX=1ffff11001b3336b RSI=0000000000000008 RDI=ffff88806cf39f48 RBP=ffff88800d977b50 RSP=ffff88800d977a20 R8 =ffff88806cf39f40 R9 =ffffed1001b2ef36 R10=0000000000000003 R11=0000000000000000 R12=ffff88806cf39500 R13=ffff88800d999b40 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8451e432 RFL=00000002 [-------] 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 00007f9436ffd900 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=00007f9436474e70 CR3=000000000cd06000 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=99091683f32c1a9b44473f15daa895c5 XMM02=2c67c8bc2e329bc3000000000011cdd0 XMM03=fb795ef6d65770560000000000120a40 XMM04=8c4170b6a0f23a8600000000000ae988 XMM05=dfcdbad4f1609c370000000000131c18 XMM06=ebee8643891d63390000000000130b20 XMM07=e042d86d42eb936e0000000000120cc0 XMM08=6fe3a61c363ed6c6000000000011ce30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000