syzkaller login: [ 31.153659] BUG: Bad rss-counter state mm:00000000c3baa328 type:MM_FILEPAGES val:33 [ 31.155088] BUG: Bad rss-counter state mm:00000000c3baa328 type:MM_ANONPAGES val:22 [ 31.297726] ================================================================== [ 31.298618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.299576] Read of size 8 at addr ffff88800f738058 by task sshd/220 [ 31.300346] [ 31.300563] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.301670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.302628] Call Trace: [ 31.302951] [ 31.303259] dump_stack_lvl+0x91/0xf0 [ 31.303754] print_report+0xcc/0x620 [ 31.304236] ? __virt_addr_valid+0x102/0x340 [ 31.304801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.305419] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306034] kasan_report+0xbe/0xf0 [ 31.306506] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307130] vma_interval_tree_remove+0xc75/0xec0 [ 31.307741] vma_prepare+0xc54/0x11a0 [ 31.308224] __split_vma+0x5af/0x950 [ 31.308695] ? __pfx___split_vma+0x10/0x10 [ 31.309241] ? find_held_lock+0x2c/0x110 [ 31.309772] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.310340] ? lock_is_held_type+0x9f/0x120 [ 31.310878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.311483] ? mtree_range_walk+0x632/0x900 [ 31.312031] ? mas_walk+0x5c7/0x7c0 [ 31.312503] do_vmi_munmap+0x1f1/0x2b0 [ 31.313019] mmap_region+0x1f9/0x2660 [ 31.313502] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.314016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.314726] ? __pfx_lock_acquire+0x10/0x10 [ 31.315258] ? __pfx_mmap_region+0x10/0x10 [ 31.315785] ? security_mmap_addr+0x7d/0xa0 [ 31.316317] ? get_unmapped_area+0x1f5/0x3f0 [ 31.316874] do_mmap+0x854/0xf00 [ 31.317312] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.317808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.318366] ksys_mmap_pgoff+0x3af/0x500 [ 31.318870] do_syscall_64+0x3f/0x90 [ 31.319346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319994] RIP: 0033:0x7f36d9811d82 [ 31.320453] 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 [ 31.322591] RSP: 002b:00007ffe5dfb94f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.323500] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36d9811d82 [ 31.324354] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36d8c4b000 [ 31.325224] RBP: 00007f36d8c4b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.326065] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557a66c07f60 [ 31.326911] R13: 00007ffe5dfb9510 R14: 00007ffe5dfb9540 R15: 00007ffe5dfb98a0 [ 31.327774] [ 31.328063] [ 31.328276] Allocated by task 213: [ 31.328711] kasan_save_stack+0x22/0x50 [ 31.329230] kasan_set_track+0x25/0x30 [ 31.329724] __kasan_slab_alloc+0x59/0x70 [ 31.330245] kmem_cache_alloc+0x16b/0x370 [ 31.330763] vm_area_dup+0x20/0x160 [ 31.331214] __split_vma+0x170/0x950 [ 31.331677] split_vma+0xc6/0x110 [ 31.332115] mprotect_fixup+0x8d2/0xb30 [ 31.332615] do_mprotect_pkey+0x87e/0xd40 [ 31.333143] __x64_sys_mprotect+0x78/0xc0 [ 31.333664] do_syscall_64+0x3f/0x90 [ 31.334141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.334782] [ 31.334996] Freed by task 203: [ 31.335386] kasan_save_stack+0x22/0x50 [ 31.335891] kasan_set_track+0x25/0x30 [ 31.336385] kasan_save_free_info+0x2b/0x50 [ 31.336922] __kasan_slab_free+0x10a/0x190 [ 31.337459] kmem_cache_free+0x10d/0x4d0 [ 31.337966] rcu_core+0x8c8/0x2860 [ 31.338411] __do_softirq+0x1b7/0x7d4 [ 31.338892] [ 31.339107] Last potentially related work creation: [ 31.339688] kasan_save_stack+0x22/0x50 [ 31.340201] __kasan_record_aux_stack+0x8e/0xa0 [ 31.340785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.341433] remove_vma+0x139/0x170 [ 31.341911] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.342480] do_vmi_munmap+0x1f1/0x2b0 [ 31.342965] __vm_munmap+0x138/0x3a0 [ 31.343431] __x64_sys_munmap+0x59/0x80 [ 31.343929] do_syscall_64+0x3f/0x90 [ 31.344400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.345049] [ 31.345263] The buggy address belongs to the object at ffff88800f738000 [ 31.345263] which belongs to the cache vm_area_struct of size 168 [ 31.346733] The buggy address is located 88 bytes inside of [ 31.346733] freed 168-byte region [ffff88800f738000, ffff88800f7380a8) [ 31.348131] [ 31.348349] The buggy address belongs to the physical page: [ 31.349039] page:000000008ca5c20f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf738 [ 31.350128] memcg:ffff88801665d301 [ 31.350551] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.351209] page_type: 0xffffffff() [ 31.351667] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.352604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801665d301 [ 31.353515] page dumped because: kasan: bad access detected [ 31.354190] [ 31.354406] Memory state around the buggy address: [ 31.354984] ffff88800f737f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.355852] ffff88800f737f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.356721] >ffff88800f738000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.357583] ^ [ 31.358320] ffff88800f738080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.359175] ffff88800f738100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.360040] ================================================================== [ 31.360976] Disabling lock debugging due to kernel taint [ 33.632433] BUG: Bad rss-counter state mm:000000004011f306 type:MM_FILEPAGES val:33 [ 33.633421] BUG: Bad rss-counter state mm:000000004011f306 type:MM_ANONPAGES val:22 [ 34.058248] BUG: Bad rss-counter state mm:00000000a3d686c0 type:MM_FILEPAGES val:33 [ 34.059274] BUG: Bad rss-counter state mm:00000000a3d686c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29751' (ECDSA) to the list of known hosts. 2023/06/21 02:24:39 fuzzer started 2023/06/21 02:24:39 dialing manager at localhost:36067 2023/06/21 02:24:39 checking machine... 2023/06/21 02:24:39 checking revisions... [ 34.770096] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:24:39 testing simple program... [ 34.828522] cgroup: Unknown subsys name 'net' [ 34.877486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:24:38 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=ffffffff864bbb54 RDX=1ffff11002d68ecd RSI=0000000000000000 RDI=ffff888016b47668 RBP=ffff888016b476f0 RSP=ffff888016b47658 R8 =ffffffff864bbb58 R9 =ffff888016b47698 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888016b47720 R13=0000000000000000 R14=ffff888015951b40 R15=0000000000092cc0 RIP=ffffffff810bd05d RFL=00000292 [--S-A--] 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 00007fa600a07900 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=00007fa600fbe618 CR3=000000000eb8e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f0c649c6020 CR3=000000000ca22000 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=35d4a6fa862191b1974140ee0fb3506c XMM02=ec2efd57dc4c00df000000000011b3f0 XMM03=00732cfded439da6000000000011b4c0 XMM04=a496df665d832a6700000000000ae988 XMM05=19e9129bd510f2350000000000131bd8 XMM06=9096e445c6f304f40000000000130a40 XMM07=e042d86d42eb936e0000000000121fe0 XMM08=00732cfded439da6000000000011b4c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000