syzkaller login: [ 81.800490] BUG: Bad rss-counter state mm:00000000f16acc74 type:MM_FILEPAGES val:33 [ 81.801513] BUG: Bad rss-counter state mm:00000000f16acc74 type:MM_ANONPAGES val:22 [ 81.963029] ================================================================== [ 81.964068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 81.965170] Read of size 8 at addr ffff88800decba50 by task sshd/221 [ 81.966253] [ 81.966508] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 81.967521] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 81.968664] Call Trace: [ 81.969037] [ 81.969369] dump_stack_lvl+0x91/0xf0 [ 81.969971] print_report+0xcc/0x620 [ 81.970539] ? __virt_addr_valid+0x102/0x340 [ 81.971099] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.971705] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.972312] kasan_report+0xbe/0xf0 [ 81.972772] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.973381] vma_interval_tree_remove+0xc75/0xec0 [ 81.973994] vma_prepare+0xc54/0x11a0 [ 81.974469] __split_vma+0x5af/0x950 [ 81.974935] ? __pfx___split_vma+0x10/0x10 [ 81.975453] ? find_held_lock+0x2c/0x110 [ 81.975963] do_vmi_align_munmap+0x2ba/0x11f0 [ 81.976519] ? lock_is_held_type+0x9f/0x120 [ 81.977052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 81.977660] ? mtree_range_walk+0x632/0x900 [ 81.978198] ? mas_walk+0x5c7/0x7c0 [ 81.978663] do_vmi_munmap+0x1f1/0x2b0 [ 81.979144] mmap_region+0x1f9/0x2660 [ 81.979615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 81.980118] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 81.980818] ? __pfx_lock_acquire+0x10/0x10 [ 81.981342] ? __pfx_mmap_region+0x10/0x10 [ 81.981868] ? security_mmap_addr+0x7d/0xa0 [ 81.982390] ? get_unmapped_area+0x1f5/0x3f0 [ 81.982932] do_mmap+0x854/0xf00 [ 81.983365] vm_mmap_pgoff+0x1a6/0x3a0 [ 81.983848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 81.984400] ksys_mmap_pgoff+0x3af/0x500 [ 81.984899] do_syscall_64+0x3f/0x90 [ 81.985372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.986011] RIP: 0033:0x7f8f3e446d82 [ 81.986460] 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 [ 81.988535] RSP: 002b:00007fff186d0a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 81.989424] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f3e446d82 [ 81.990277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f3d880000 [ 81.991106] RBP: 00007f8f3d880000 R08: 0000000000000009 R09: 0000000000001000 [ 81.991937] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ca5e8b980 [ 81.992768] R13: 00007fff186d0a50 R14: 00007fff186d0a80 R15: 00007fff186d0de0 [ 81.993616] [ 81.993903] [ 81.994114] Allocated by task 214: [ 81.994537] kasan_save_stack+0x22/0x50 [ 81.995034] kasan_set_track+0x25/0x30 [ 81.995519] __kasan_slab_alloc+0x59/0x70 [ 81.996037] kmem_cache_alloc+0x16b/0x370 [ 81.996546] vm_area_dup+0x20/0x160 [ 81.996989] __split_vma+0x170/0x950 [ 81.997444] split_vma+0xc6/0x110 [ 81.997897] mprotect_fixup+0x8d2/0xb30 [ 81.998391] do_mprotect_pkey+0x87e/0xd40 [ 81.998901] __x64_sys_mprotect+0x78/0xc0 [ 81.999411] do_syscall_64+0x3f/0x90 [ 81.999877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.000507] [ 82.000721] Freed by task 214: [ 82.001106] kasan_save_stack+0x22/0x50 [ 82.001608] kasan_set_track+0x25/0x30 [ 82.002093] kasan_save_free_info+0x2b/0x50 [ 82.002614] __kasan_slab_free+0x10a/0x190 [ 82.003138] kmem_cache_free+0x10d/0x4d0 [ 82.003639] rcu_core+0x8c8/0x2860 [ 82.004075] __do_softirq+0x1b7/0x7d4 [ 82.004542] [ 82.004753] Last potentially related work creation: [ 82.005328] kasan_save_stack+0x22/0x50 [ 82.005828] __kasan_record_aux_stack+0x8e/0xa0 [ 82.006392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.007098] remove_vma+0x139/0x170 [ 82.007540] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.008083] do_vmi_munmap+0x1f1/0x2b0 [ 82.008557] __vm_munmap+0x138/0x3a0 [ 82.009012] __x64_sys_munmap+0x59/0x80 [ 82.009508] do_syscall_64+0x3f/0x90 [ 82.009972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.010611] [ 82.010825] The buggy address belongs to the object at ffff88800decb9f8 [ 82.010825] which belongs to the cache vm_area_struct of size 168 [ 82.012274] The buggy address is located 88 bytes inside of [ 82.012274] freed 168-byte region [ffff88800decb9f8, ffff88800decbaa0) [ 82.013670] [ 82.013886] The buggy address belongs to the physical page: [ 82.014553] page:00000000544900da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdecb [ 82.015634] memcg:ffff888015b5b501 [ 82.016069] flags: 0x100000000000200(slab|node=0|zone=1) [ 82.016721] page_type: 0xffffffff() [ 82.017163] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 82.018087] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b5b501 [ 82.018977] page dumped because: kasan: bad access detected [ 82.019624] [ 82.019834] Memory state around the buggy address: [ 82.020400] ffff88800decb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 82.021238] ffff88800decb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 82.022079] >ffff88800decba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.022913] ^ [ 82.023601] ffff88800decba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 82.024435] ffff88800decbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.025265] ================================================================== [ 82.026163] Disabling lock debugging due to kernel taint [ 83.997329] BUG: Bad rss-counter state mm:0000000017ab29a0 type:MM_FILEPAGES val:33 [ 83.998549] BUG: Bad rss-counter state mm:0000000017ab29a0 type:MM_ANONPAGES val:22 [ 84.547570] BUG: Bad rss-counter state mm:00000000c2eaa973 type:MM_FILEPAGES val:33 [ 84.548704] BUG: Bad rss-counter state mm:00000000c2eaa973 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30026' (ECDSA) to the list of known hosts. 2023/06/19 17:59:42 fuzzer started 2023/06/19 17:59:42 dialing manager at localhost:44161 2023/06/19 17:59:42 checking machine... 2023/06/19 17:59:42 checking revisions... [ 85.205400] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:59:42 testing simple program... [ 85.256734] cgroup: Unknown subsys name 'net' [ 85.311761] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:59:21 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136c RSI=ffffffff836382d7 RDI=ffff88806ce09b6c RBP=0000000000000015 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000091b07 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88801659d1c0 R15=ffff88800e67a540 RIP=ffffffff813ad4cf 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 00007fb1d5665900 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=00007fb1d5c1c618 CR3=0000000016e2c000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7a114b16f0 CR3=000000000d5c2000 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=e45245536b1fda961047470c9d63f942 XMM02=000000000011d998eff9b2d0a8fce9cb XMM03=000000000011da682c67c8bc2e329bc3 XMM04=0bf5de9c1ed14e8d00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134280 XMM06=a9d5dd3249e5439f00000000001330e8 XMM07=e042d86d42eb936e0000000000124960 XMM08=dd0040741ee6a263000000000011da68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000