syzkaller login: [ 30.534931] BUG: Bad rss-counter state mm:00000000fdade186 type:MM_FILEPAGES val:33 [ 30.536514] BUG: Bad rss-counter state mm:00000000fdade186 type:MM_ANONPAGES val:22 [ 30.696601] ================================================================== [ 30.697519] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.698456] Read of size 8 at addr ffff888009518a50 by task sshd/221 [ 30.699319] [ 30.699583] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.700455] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.701437] Call Trace: [ 30.701776] [ 30.702062] dump_stack_lvl+0x91/0xf0 [ 30.702560] print_report+0xcc/0x620 [ 30.703046] ? __virt_addr_valid+0x102/0x340 [ 30.703597] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.704232] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.704848] kasan_report+0xbe/0xf0 [ 30.705323] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.705953] vma_interval_tree_remove+0xc75/0xec0 [ 30.706558] vma_prepare+0xc54/0x11a0 [ 30.707043] __split_vma+0x5af/0x950 [ 30.707518] ? __pfx___split_vma+0x10/0x10 [ 30.708075] ? find_held_lock+0x2c/0x110 [ 30.708597] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.709159] ? lock_is_held_type+0x9f/0x120 [ 30.709699] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.710304] ? mtree_range_walk+0x632/0x900 [ 30.710864] ? mas_walk+0x5c7/0x7c0 [ 30.711336] do_vmi_munmap+0x1f1/0x2b0 [ 30.711838] mmap_region+0x1f9/0x2660 [ 30.712321] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.712832] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.713550] ? __pfx_lock_acquire+0x10/0x10 [ 30.714091] ? __pfx_mmap_region+0x10/0x10 [ 30.714635] ? security_mmap_addr+0x7d/0xa0 [ 30.715166] ? get_unmapped_area+0x1f5/0x3f0 [ 30.715716] do_mmap+0x854/0xf00 [ 30.716173] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.716670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.717229] ksys_mmap_pgoff+0x3af/0x500 [ 30.717739] do_syscall_64+0x3f/0x90 [ 30.718229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718874] RIP: 0033:0x7f252febdd82 [ 30.719332] 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 [ 30.721464] RSP: 002b:00007ffc9a3fe298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.722371] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f252febdd82 [ 30.723219] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f252f2f7000 [ 30.724089] RBP: 00007f252f2f7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.724946] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f78b09f70 [ 30.725804] R13: 00007ffc9a3fe2b0 R14: 00007ffc9a3fe2e0 R15: 00007ffc9a3fe640 [ 30.726660] [ 30.726958] [ 30.727171] Allocated by task 214: [ 30.727597] kasan_save_stack+0x22/0x50 [ 30.728117] kasan_set_track+0x25/0x30 [ 30.728681] __kasan_slab_alloc+0x59/0x70 [ 30.729316] kmem_cache_alloc+0x16b/0x370 [ 30.729943] vm_area_dup+0x20/0x160 [ 30.730491] __split_vma+0x170/0x950 [ 30.731053] split_vma+0xc6/0x110 [ 30.731589] mprotect_fixup+0x8d2/0xb30 [ 30.732341] do_mprotect_pkey+0x87e/0xd40 [ 30.733002] __x64_sys_mprotect+0x78/0xc0 [ 30.733642] do_syscall_64+0x3f/0x90 [ 30.734231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.735018] [ 30.735279] Freed by task 214: [ 30.735755] kasan_save_stack+0x22/0x50 [ 30.736387] kasan_set_track+0x25/0x30 [ 30.736999] kasan_save_free_info+0x2b/0x50 [ 30.737664] __kasan_slab_free+0x10a/0x190 [ 30.738321] kmem_cache_free+0x10d/0x4d0 [ 30.738943] rcu_core+0x8c8/0x2860 [ 30.739502] __do_softirq+0x1b7/0x7d4 [ 30.740180] [ 30.740444] Last potentially related work creation: [ 30.741166] kasan_save_stack+0x22/0x50 [ 30.741785] __kasan_record_aux_stack+0x8e/0xa0 [ 30.742493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.743287] remove_vma+0x139/0x170 [ 30.743870] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.744515] do_vmi_munmap+0x1f1/0x2b0 [ 30.744996] __vm_munmap+0x138/0x3a0 [ 30.745464] __x64_sys_munmap+0x59/0x80 [ 30.745959] do_syscall_64+0x3f/0x90 [ 30.746440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747082] [ 30.747296] Second to last potentially related work creation: [ 30.747990] kasan_save_stack+0x22/0x50 [ 30.748499] __kasan_record_aux_stack+0x8e/0xa0 [ 30.749079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.749724] remove_vma+0x139/0x170 [ 30.750182] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.750736] do_vmi_munmap+0x1f1/0x2b0 [ 30.751221] mmap_region+0x1f9/0x2660 [ 30.751707] do_mmap+0x854/0xf00 [ 30.752149] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752649] ksys_mmap_pgoff+0x3af/0x500 [ 30.753164] do_syscall_64+0x3f/0x90 [ 30.753638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754277] [ 30.754502] The buggy address belongs to the object at ffff8880095189f8 [ 30.754502] which belongs to the cache vm_area_struct of size 168 [ 30.755989] The buggy address is located 88 bytes inside of [ 30.755989] freed 168-byte region [ffff8880095189f8, ffff888009518aa0) [ 30.757392] [ 30.757613] The buggy address belongs to the physical page: [ 30.758274] page:00000000d9e4efbb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9518 [ 30.759354] memcg:ffff88800dd51b01 [ 30.759781] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.760491] page_type: 0xffffffff() [ 30.760946] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.761876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd51b01 [ 30.762782] page dumped because: kasan: bad access detected [ 30.763444] [ 30.763666] Memory state around the buggy address: [ 30.764254] ffff888009518900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.765117] ffff888009518980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.765979] >ffff888009518a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.766840] ^ [ 30.767545] ffff888009518a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.768430] ffff888009518b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.769276] ================================================================== [ 30.770279] Disabling lock debugging due to kernel taint [ 33.711378] BUG: Bad rss-counter state mm:00000000dafeaf67 type:MM_FILEPAGES val:33 [ 33.712399] BUG: Bad rss-counter state mm:00000000dafeaf67 type:MM_ANONPAGES val:22 [ 34.104016] BUG: Bad rss-counter state mm:0000000022c22e12 type:MM_FILEPAGES val:33 [ 34.105060] BUG: Bad rss-counter state mm:0000000022c22e12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41524' (ECDSA) to the list of known hosts. 2023/06/21 02:00:57 fuzzer started 2023/06/21 02:00:57 dialing manager at localhost:36067 2023/06/21 02:00:58 checking machine... 2023/06/21 02:00:58 checking revisions... [ 34.851579] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:00:58 testing simple program... [ 34.902051] cgroup: Unknown subsys name 'net' [ 34.940197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:00:57 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00007f2e36a29366 RCX=ffffffff813a0add RDX=ffff88801420b680 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff8880166af3e0 R8 =0000000000000006 R9 =00007f2e36a29366 R10=ffffffffffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88801420b680 R15=0000000000082cc0 RIP=ffffffff814c086b 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 00007f2e36536900 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=00007ffed920b000 CR3=000000000c950000 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=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=00007f6eb1ac6020 CR3=000000000c4ea000 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=98985805a99616872c488b243b9b4e98 XMM02=2c67c8bc2e329bc3000000000011bbf0 XMM03=fb795ef6d65770560000000000122dd8 XMM04=98f1aa18c1c27bf000000000000ae988 XMM05=e4cb8bb95a7664b60000000000134010 XMM06=c291bd5c70af25b90000000000133e98 XMM07=e042d86d42eb936e0000000000123058 XMM08=7d6bf0d9a38e5569000000000011bc50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000