[ 38.217885] BUG: Bad rss-counter state mm:000000003b660b62 type:MM_FILEPAGES val:33 [ 38.219151] BUG: Bad rss-counter state mm:000000003b660b62 type:MM_ANONPAGES val:22 [ 38.259839] ================================================================== [ 38.260905] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.261912] Read of size 8 at addr ffff88801bc16df0 by task sshd/218 [ 38.262700] [ 38.262920] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.263788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.264754] Call Trace: [ 38.265072] [ 38.265353] dump_stack_lvl+0x91/0xf0 [ 38.265841] print_report+0xcc/0x620 [ 38.266353] ? __virt_addr_valid+0x102/0x340 [ 38.266901] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.267533] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.268155] kasan_report+0xbe/0xf0 [ 38.268638] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.269253] vma_interval_tree_remove+0xc75/0xec0 [ 38.269852] vma_prepare+0xc54/0x11a0 [ 38.270333] __split_vma+0x5af/0x950 [ 38.270803] ? __pfx___split_vma+0x10/0x10 [ 38.271333] ? find_held_lock+0x2c/0x110 [ 38.271855] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.272415] ? lock_is_held_type+0x9f/0x120 [ 38.272953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.273558] ? mtree_range_walk+0x632/0x900 [ 38.274111] ? mas_walk+0x5c7/0x7c0 [ 38.274594] do_vmi_munmap+0x1f1/0x2b0 [ 38.275089] mmap_region+0x1f9/0x2660 [ 38.275566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.276078] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.276791] ? __pfx_lock_acquire+0x10/0x10 [ 38.277320] ? __pfx_mmap_region+0x10/0x10 [ 38.277849] ? security_mmap_addr+0x7d/0xa0 [ 38.278396] ? get_unmapped_area+0x1f5/0x3f0 [ 38.278947] do_mmap+0x854/0xf00 [ 38.279386] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.279877] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.280436] ksys_mmap_pgoff+0x3af/0x500 [ 38.280941] do_syscall_64+0x3f/0x90 [ 38.281412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.282059] RIP: 0033:0x7fc3e45e2d82 [ 38.282522] 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 [ 38.284647] RSP: 002b:00007ffffbc49ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.285566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3e45e2d82 [ 38.286427] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3e3a1c000 [ 38.287265] RBP: 00007fc3e3a1c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.288110] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f4405edec0 [ 38.288969] R13: 00007ffffbc49af0 R14: 00007ffffbc49b20 R15: 00007ffffbc49e80 [ 38.289827] [ 38.290119] [ 38.290344] Allocated by task 208: [ 38.290777] kasan_save_stack+0x22/0x50 [ 38.291280] kasan_set_track+0x25/0x30 [ 38.291770] __kasan_slab_alloc+0x59/0x70 [ 38.292295] kmem_cache_alloc+0x16b/0x370 [ 38.292810] vm_area_dup+0x20/0x160 [ 38.293271] __split_vma+0x170/0x950 [ 38.293741] split_vma+0xc6/0x110 [ 38.294178] mprotect_fixup+0x8d2/0xb30 [ 38.294699] do_mprotect_pkey+0x87e/0xd40 [ 38.295217] __x64_sys_mprotect+0x78/0xc0 [ 38.295742] do_syscall_64+0x3f/0x90 [ 38.296215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.296860] [ 38.297074] Freed by task 208: [ 38.297461] kasan_save_stack+0x22/0x50 [ 38.297961] kasan_set_track+0x25/0x30 [ 38.298459] kasan_save_free_info+0x2b/0x50 [ 38.299004] __kasan_slab_free+0x10a/0x190 [ 38.299534] kmem_cache_free+0x10d/0x4d0 [ 38.300047] rcu_core+0x8c8/0x2860 [ 38.300493] __do_softirq+0x1b7/0x7d4 [ 38.300965] [ 38.301179] Last potentially related work creation: [ 38.301763] kasan_save_stack+0x22/0x50 [ 38.302272] __kasan_record_aux_stack+0x8e/0xa0 [ 38.302841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.303489] remove_vma+0x139/0x170 [ 38.303942] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.304504] do_vmi_munmap+0x1f1/0x2b0 [ 38.304989] __vm_munmap+0x138/0x3a0 [ 38.305452] __x64_sys_munmap+0x59/0x80 [ 38.305948] do_syscall_64+0x3f/0x90 [ 38.306437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.307077] [ 38.307291] The buggy address belongs to the object at ffff88801bc16d98 [ 38.307291] which belongs to the cache vm_area_struct of size 168 [ 38.308766] The buggy address is located 88 bytes inside of [ 38.308766] freed 168-byte region [ffff88801bc16d98, ffff88801bc16e40) [ 38.310162] [ 38.310390] The buggy address belongs to the physical page: [ 38.311054] page:00000000e3f0570c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc16 [ 38.312154] memcg:ffff88801bc17001 [ 38.312588] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.313240] page_type: 0xffffffff() [ 38.313691] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.314624] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc17001 [ 38.315541] page dumped because: kasan: bad access detected [ 38.316206] [ 38.316420] Memory state around the buggy address: [ 38.317005] ffff88801bc16c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.317874] ffff88801bc16d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.318743] >ffff88801bc16d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.319598] ^ [ 38.320404] ffff88801bc16e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.321258] ffff88801bc16e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.322106] ================================================================== [ 38.323197] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.943824] BUG: Bad rss-counter state mm:0000000068bb7388 type:MM_FILEPAGES val:33 [ 39.944391] BUG: Bad rss-counter state mm:0000000068bb7388 type:MM_ANONPAGES val:22 [ 40.323713] BUG: Bad rss-counter state mm:000000006d6c858e type:MM_FILEPAGES val:33 [ 40.324460] BUG: Bad rss-counter state mm:000000006d6c858e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65035' (ECDSA) to the list of known hosts. 2023/06/19 17:45:44 fuzzer started 2023/06/19 17:45:44 dialing manager at localhost:44161 2023/06/19 17:45:44 checking machine... 2023/06/19 17:45:44 checking revisions... [ 41.026265] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:45:44 testing simple program... [ 41.074133] cgroup: Unknown subsys name 'net' [ 41.124970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:45:30 Registers: info registers vcpu 0 RAX=000000003a653db4 RBX=00000000000134fc RCX=0000000000000000 RDX=0000000000000012 RSI=ffffffff813c920d RDI=ffffffff85497f20 RBP=0000000000000000 RSP=ffff88806ce09f50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88806ce2c2b8 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff810a48a7 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 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=00007ffd9980e478 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=00007f2b7d9cb5100000560ae1b50790 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=0000000000000002 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000000002 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffff8880167372b0 RSP=ffff8880167371d0 R8 =ffffffff864b9d50 R9 =ffff888016737298 R10=0000000000038001 R11=00000000000b6996 R12=ffff8880167372b8 R13=ffff8880167372a0 R14=ffff888016737299 R15=ffff888016737258 RIP=ffffffff8112fc16 RFL=00000202 [-------] 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 00007faf32c8a900 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=00007faf33241618 CR3=0000000019812000 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