syzkaller login: [ 38.752521] BUG: Bad rss-counter state mm:00000000623408bb type:MM_FILEPAGES val:33 [ 38.754568] BUG: Bad rss-counter state mm:00000000623408bb type:MM_ANONPAGES val:22 [ 38.923051] ================================================================== [ 38.924147] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.925358] Read of size 8 at addr ffff88800e6e9798 by task sshd/221 [ 38.926206] [ 38.926424] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.927306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.928275] Call Trace: [ 38.928593] [ 38.928882] dump_stack_lvl+0x91/0xf0 [ 38.929370] print_report+0xcc/0x620 [ 38.929870] ? __virt_addr_valid+0x102/0x340 [ 38.930427] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931041] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.931664] kasan_report+0xbe/0xf0 [ 38.932142] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.932768] vma_interval_tree_remove+0xc75/0xec0 [ 38.933368] vma_prepare+0xc54/0x11a0 [ 38.933873] __split_vma+0x5af/0x950 [ 38.934346] ? __pfx___split_vma+0x10/0x10 [ 38.934878] ? find_held_lock+0x2c/0x110 [ 38.935404] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.935967] ? lock_is_held_type+0x9f/0x120 [ 38.936508] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.937120] ? mtree_range_walk+0x632/0x900 [ 38.937683] ? mas_walk+0x5c7/0x7c0 [ 38.938163] do_vmi_munmap+0x1f1/0x2b0 [ 38.938663] mmap_region+0x1f9/0x2660 [ 38.939138] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.939650] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.940366] ? __pfx_lock_acquire+0x10/0x10 [ 38.940907] ? __pfx_mmap_region+0x10/0x10 [ 38.941444] ? security_mmap_addr+0x7d/0xa0 [ 38.941972] ? get_unmapped_area+0x1f5/0x3f0 [ 38.942519] do_mmap+0x854/0xf00 [ 38.942965] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.943465] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.944032] ksys_mmap_pgoff+0x3af/0x500 [ 38.944539] do_syscall_64+0x3f/0x90 [ 38.945018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945683] RIP: 0033:0x7fb79f5b8d82 [ 38.946141] 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 [ 38.948273] RSP: 002b:00007ffe0d83e318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.949185] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb79f5b8d82 [ 38.950049] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb79e9f2000 [ 38.950903] RBP: 00007fb79e9f2000 R08: 0000000000000009 R09: 0000000000001000 [ 38.951757] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c44719bf70 [ 38.952614] R13: 00007ffe0d83e330 R14: 00007ffe0d83e360 R15: 00007ffe0d83e6c0 [ 38.953515] [ 38.953811] [ 38.954024] Allocated by task 214: [ 38.954454] kasan_save_stack+0x22/0x50 [ 38.954964] kasan_set_track+0x25/0x30 [ 38.955458] __kasan_slab_alloc+0x59/0x70 [ 38.955978] kmem_cache_alloc+0x16b/0x370 [ 38.956499] vm_area_dup+0x20/0x160 [ 38.956955] __split_vma+0x170/0x950 [ 38.957439] split_vma+0xc6/0x110 [ 38.957886] mprotect_fixup+0x8d2/0xb30 [ 38.958386] do_mprotect_pkey+0x87e/0xd40 [ 38.958907] __x64_sys_mprotect+0x78/0xc0 [ 38.959424] do_syscall_64+0x3f/0x90 [ 38.959901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.960545] [ 38.960757] Freed by task 214: [ 38.961153] kasan_save_stack+0x22/0x50 [ 38.961680] kasan_set_track+0x25/0x30 [ 38.962181] kasan_save_free_info+0x2b/0x50 [ 38.962719] __kasan_slab_free+0x10a/0x190 [ 38.963251] kmem_cache_free+0x10d/0x4d0 [ 38.963759] rcu_core+0x8c8/0x2860 [ 38.964202] __do_softirq+0x1b7/0x7d4 [ 38.964677] [ 38.964890] Last potentially related work creation: [ 38.965489] kasan_save_stack+0x22/0x50 [ 38.965992] __kasan_record_aux_stack+0x8e/0xa0 [ 38.966563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.967203] remove_vma+0x139/0x170 [ 38.967654] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.968213] do_vmi_munmap+0x1f1/0x2b0 [ 38.968698] __vm_munmap+0x138/0x3a0 [ 38.969171] __x64_sys_munmap+0x59/0x80 [ 38.969678] do_syscall_64+0x3f/0x90 [ 38.970157] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.970807] [ 38.971023] Second to last potentially related work creation: [ 38.971730] kasan_save_stack+0x22/0x50 [ 38.972239] __kasan_record_aux_stack+0x8e/0xa0 [ 38.972817] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.973479] remove_vma+0x139/0x170 [ 38.973926] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.974497] do_vmi_munmap+0x1f1/0x2b0 [ 38.974993] mmap_region+0x1f9/0x2660 [ 38.975477] do_mmap+0x854/0xf00 [ 38.975905] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.976392] ksys_mmap_pgoff+0x3af/0x500 [ 38.976904] do_syscall_64+0x3f/0x90 [ 38.977388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.978041] [ 38.978257] The buggy address belongs to the object at ffff88800e6e9740 [ 38.978257] which belongs to the cache vm_area_struct of size 168 [ 38.979712] The buggy address is located 88 bytes inside of [ 38.979712] freed 168-byte region [ffff88800e6e9740, ffff88800e6e97e8) [ 38.981099] [ 38.981312] The buggy address belongs to the physical page: [ 38.981988] page:00000000c3b08ced refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6e9 [ 38.983069] memcg:ffff88800e7bc401 [ 38.983494] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.984201] page_type: 0xffffffff() [ 38.984656] raw: 0100000000000200 ffff8880087a0c80 ffffea00005891c0 dead000000000003 [ 38.985583] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7bc401 [ 38.986498] page dumped because: kasan: bad access detected [ 38.987166] [ 38.987382] Memory state around the buggy address: [ 38.987978] ffff88800e6e9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.988844] ffff88800e6e9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.989718] >ffff88800e6e9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.990585] ^ [ 38.991076] ffff88800e6e9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.991942] ffff88800e6e9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.992796] ================================================================== [ 38.993886] Disabling lock debugging due to kernel taint [ 40.986456] BUG: Bad rss-counter state mm:000000001a45be20 type:MM_FILEPAGES val:33 [ 40.987620] BUG: Bad rss-counter state mm:000000001a45be20 type:MM_ANONPAGES val:22 [ 41.514588] BUG: Bad rss-counter state mm:00000000289de772 type:MM_FILEPAGES val:33 [ 41.515579] BUG: Bad rss-counter state mm:00000000289de772 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45831' (ECDSA) to the list of known hosts. 2023/06/21 05:38:46 fuzzer started 2023/06/21 05:38:46 dialing manager at localhost:36067 2023/06/21 05:38:46 checking machine... 2023/06/21 05:38:46 checking revisions... [ 42.221328] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:38:46 testing simple program... [ 42.261873] cgroup: Unknown subsys name 'net' [ 42.326637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:38:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff888016570e68 RBP=ffff888016570c40 RSP=ffff888016317c58 R8 =0000000000000001 R9 =ffffed1002cae204 R10=ffff888016571027 R11=00000000000b6a61 R12=ffff888016570d18 R13=ffff888016570c68 R14=ffffffff84d2ed20 R15=ffff888016570d18 RIP=ffffffff8166e0a6 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 00007f6713af6900 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=00007ffc2a6ca000 CR3=0000000016354000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=ffff888008c04400 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=00007f0fc07d6df0 CR3=0000000014580000 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=dff32ef7aeb23c86fb4c74885a7b3571 XMM02=000000000011b868eff9b2d0a8fce9cb XMM03=000000000011b9382c67c8bc2e329bc3 XMM04=01e99a23ba982c0900000000000ae988 XMM05=e4cb8bb95a7664b60000000000132950 XMM06=f21d0029730050450000000000131b28 XMM07=e042d86d42eb936e0000000000121d80 XMM08=ceb963de8d4a2e6c000000000011b938 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000