syzkaller login: [ 29.334384] BUG: Bad rss-counter state mm:00000000a020e022 type:MM_FILEPAGES val:33 [ 29.335507] BUG: Bad rss-counter state mm:00000000a020e022 type:MM_ANONPAGES val:22 [ 29.500609] ================================================================== [ 29.501541] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.502581] Read of size 8 at addr ffff88800debaed8 by task sshd/219 [ 29.503342] [ 29.503574] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.504475] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.505494] Call Trace: [ 29.505823] [ 29.506116] dump_stack_lvl+0x91/0xf0 [ 29.506606] print_report+0xcc/0x620 [ 29.507099] ? __virt_addr_valid+0x102/0x340 [ 29.507680] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.508308] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.508951] kasan_report+0xbe/0xf0 [ 29.509438] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.510060] vma_interval_tree_remove+0xc75/0xec0 [ 29.510662] vma_prepare+0xc54/0x11a0 [ 29.511156] __split_vma+0x5af/0x950 [ 29.511634] ? __pfx___split_vma+0x10/0x10 [ 29.512162] ? find_held_lock+0x2c/0x110 [ 29.512679] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.513245] ? lock_is_held_type+0x9f/0x120 [ 29.513776] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.514383] ? mtree_range_walk+0x632/0x900 [ 29.514940] ? mas_walk+0x5c7/0x7c0 [ 29.515414] do_vmi_munmap+0x1f1/0x2b0 [ 29.515948] mmap_region+0x1f9/0x2660 [ 29.516454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.516948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.517622] ? __pfx_lock_acquire+0x10/0x10 [ 29.518130] ? __pfx_mmap_region+0x10/0x10 [ 29.518633] ? security_mmap_addr+0x7d/0xa0 [ 29.519148] ? get_unmapped_area+0x1f5/0x3f0 [ 29.519737] do_mmap+0x854/0xf00 [ 29.520177] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.520649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.521186] ksys_mmap_pgoff+0x3af/0x500 [ 29.521704] do_syscall_64+0x3f/0x90 [ 29.522231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.522852] RIP: 0033:0x7fcc57343d82 [ 29.523282] 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 [ 29.525326] RSP: 002b:00007ffd71ab3698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.526216] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc57343d82 [ 29.527043] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc5677d000 [ 29.527891] RBP: 00007fcc5677d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.528723] R10: 0000000000000812 R11: 0000000000000206 R12: 00005636ef8f7ec0 [ 29.529553] R13: 00007ffd71ab36b0 R14: 00007ffd71ab36e0 R15: 00007ffd71ab3a40 [ 29.530395] [ 29.530680] [ 29.530893] Allocated by task 212: [ 29.531314] kasan_save_stack+0x22/0x50 [ 29.531830] kasan_set_track+0x25/0x30 [ 29.532321] __kasan_slab_alloc+0x59/0x70 [ 29.532838] kmem_cache_alloc+0x16b/0x370 [ 29.533343] vm_area_dup+0x20/0x160 [ 29.533795] __split_vma+0x170/0x950 [ 29.534257] split_vma+0xc6/0x110 [ 29.534686] mprotect_fixup+0x8d2/0xb30 [ 29.535183] do_mprotect_pkey+0x87e/0xd40 [ 29.535699] __x64_sys_mprotect+0x78/0xc0 [ 29.536221] do_syscall_64+0x3f/0x90 [ 29.536680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.537306] [ 29.537524] Freed by task 212: [ 29.537908] kasan_save_stack+0x22/0x50 [ 29.538404] kasan_set_track+0x25/0x30 [ 29.538890] kasan_save_free_info+0x2b/0x50 [ 29.539420] __kasan_slab_free+0x10a/0x190 [ 29.539968] kmem_cache_free+0x10d/0x4d0 [ 29.540465] rcu_core+0x8c8/0x2860 [ 29.540907] __do_softirq+0x1b7/0x7d4 [ 29.541378] [ 29.541595] Last potentially related work creation: [ 29.542175] kasan_save_stack+0x22/0x50 [ 29.542674] __kasan_record_aux_stack+0x8e/0xa0 [ 29.543234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.543872] remove_vma+0x139/0x170 [ 29.544312] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.544861] do_vmi_munmap+0x1f1/0x2b0 [ 29.545343] __vm_munmap+0x138/0x3a0 [ 29.545803] __x64_sys_munmap+0x59/0x80 [ 29.546290] do_syscall_64+0x3f/0x90 [ 29.546762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.547398] [ 29.547630] The buggy address belongs to the object at ffff88800debae80 [ 29.547630] which belongs to the cache vm_area_struct of size 168 [ 29.549079] The buggy address is located 88 bytes inside of [ 29.549079] freed 168-byte region [ffff88800debae80, ffff88800debaf28) [ 29.550473] [ 29.550687] The buggy address belongs to the physical page: [ 29.551351] page:0000000059c592cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeba [ 29.552435] memcg:ffff888016919701 [ 29.552860] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.553492] page_type: 0xffffffff() [ 29.553935] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.554838] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016919701 [ 29.555759] page dumped because: kasan: bad access detected [ 29.556420] [ 29.556632] Memory state around the buggy address: [ 29.557204] ffff88800debad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.558050] ffff88800debae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 29.558895] >ffff88800debae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.559745] ^ [ 29.560461] ffff88800debaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.561302] ffff88800debaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.562140] ================================================================== [ 29.563115] Disabling lock debugging due to kernel taint [ 31.788830] BUG: Bad rss-counter state mm:00000000bdae0e83 type:MM_FILEPAGES val:33 [ 31.789856] BUG: Bad rss-counter state mm:00000000bdae0e83 type:MM_ANONPAGES val:22 [ 32.329026] BUG: Bad rss-counter state mm:0000000099ec7dcc type:MM_FILEPAGES val:33 [ 32.330252] BUG: Bad rss-counter state mm:0000000099ec7dcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37409' (ECDSA) to the list of known hosts. 2023/06/19 21:27:16 fuzzer started 2023/06/19 21:27:17 dialing manager at localhost:44161 2023/06/19 21:27:17 checking machine... 2023/06/19 21:27:17 checking revisions... [ 32.975409] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:27:17 testing simple program... [ 33.027390] cgroup: Unknown subsys name 'net' [ 33.081018] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:27:16 Registers: info registers vcpu 0 RAX=1ffff11002ef1f4b RBX=0000000000000009 RCX=0000000000000001 RDX=0000000000092cc0 RSI=000000000000000c RDI=ffff88801778fa58 RBP=dffffc0000000000 RSP=ffff88801778f980 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000c R13=0000000000092cc0 R14=ffff88801778fa10 R15=0000000000092cc0 RIP=ffffffff813ad5ca 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 00007f96a7b08900 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=00007ffde48de000 CR3=00000000102e4000 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=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=00007f85a7a97b80 CR3=000000000c630000 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=1092a15167be78aa434f55ad7d648ed8 XMM02=000000000011ece8eff9b2d0a8fce9cb XMM03=000000000011edb82c67c8bc2e329bc3 XMM04=c565ee6319e6cc5700000000000ae988 XMM05=dfcdbad4f1609c370000000000135600 XMM06=3674f41dcb65cd1e0000000000134468 XMM07=e042d86d42eb936e0000000000126448 XMM08=7ce2f466b30f1c6e000000000011edb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000