syzkaller login: [ 30.842980] BUG: Bad rss-counter state mm:0000000057802fb8 type:MM_FILEPAGES val:33 [ 30.844134] BUG: Bad rss-counter state mm:0000000057802fb8 type:MM_ANONPAGES val:22 [ 30.887769] ================================================================== [ 30.888945] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.890070] Read of size 8 at addr ffff888015ff6c20 by task sshd/220 [ 30.890969] [ 30.891238] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.892205] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.893300] Call Trace: [ 30.893620] [ 30.893909] dump_stack_lvl+0x91/0xf0 [ 30.894479] print_report+0xcc/0x620 [ 30.895037] ? __virt_addr_valid+0x102/0x340 [ 30.895740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.896441] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.897123] kasan_report+0xbe/0xf0 [ 30.897678] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.898442] vma_interval_tree_remove+0xc75/0xec0 [ 30.899051] vma_prepare+0xc54/0x11a0 [ 30.899534] __split_vma+0x5af/0x950 [ 30.900009] ? __pfx___split_vma+0x10/0x10 [ 30.900550] ? find_held_lock+0x2c/0x110 [ 30.901077] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.901644] ? lock_is_held_type+0x9f/0x120 [ 30.902186] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.902793] ? mtree_range_walk+0x632/0x900 [ 30.903351] ? mas_walk+0x5c7/0x7c0 [ 30.903830] do_vmi_munmap+0x1f1/0x2b0 [ 30.904331] mmap_region+0x1f9/0x2660 [ 30.904820] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.905332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.906050] ? __pfx_lock_acquire+0x10/0x10 [ 30.906583] ? __pfx_mmap_region+0x10/0x10 [ 30.907116] ? security_mmap_addr+0x7d/0xa0 [ 30.907651] ? get_unmapped_area+0x1f5/0x3f0 [ 30.908203] do_mmap+0x854/0xf00 [ 30.908674] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.909181] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.909749] ksys_mmap_pgoff+0x3af/0x500 [ 30.910265] do_syscall_64+0x3f/0x90 [ 30.910747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.911392] RIP: 0033:0x7f60d6b9fd82 [ 30.911861] 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 [ 30.913993] RSP: 002b:00007ffc0ecb36b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.914903] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60d6b9fd82 [ 30.915764] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60d5fd9000 [ 30.916628] RBP: 00007f60d5fd9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.917474] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a91109fec0 [ 30.918329] R13: 00007ffc0ecb36d0 R14: 00007ffc0ecb3700 R15: 00007ffc0ecb3a60 [ 30.919203] [ 30.919495] [ 30.919708] Allocated by task 213: [ 30.920138] kasan_save_stack+0x22/0x50 [ 30.920658] kasan_set_track+0x25/0x30 [ 30.921158] __kasan_slab_alloc+0x59/0x70 [ 30.921683] kmem_cache_alloc+0x16b/0x370 [ 30.922200] vm_area_dup+0x20/0x160 [ 30.922653] __split_vma+0x170/0x950 [ 30.923119] split_vma+0xc6/0x110 [ 30.923559] mprotect_fixup+0x8d2/0xb30 [ 30.924066] do_mprotect_pkey+0x87e/0xd40 [ 30.924596] __x64_sys_mprotect+0x78/0xc0 [ 30.925118] do_syscall_64+0x3f/0x90 [ 30.925591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926244] [ 30.926465] Freed by task 213: [ 30.926862] kasan_save_stack+0x22/0x50 [ 30.927366] kasan_set_track+0x25/0x30 [ 30.927859] kasan_save_free_info+0x2b/0x50 [ 30.928385] __kasan_slab_free+0x10a/0x190 [ 30.928929] kmem_cache_free+0x10d/0x4d0 [ 30.929523] rcu_core+0x8c8/0x2860 [ 30.929973] __do_softirq+0x1b7/0x7d4 [ 30.930444] [ 30.930660] Last potentially related work creation: [ 30.931240] kasan_save_stack+0x22/0x50 [ 30.931744] __kasan_record_aux_stack+0x8e/0xa0 [ 30.932314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.932965] remove_vma+0x139/0x170 [ 30.933420] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.933978] do_vmi_munmap+0x1f1/0x2b0 [ 30.934459] __vm_munmap+0x138/0x3a0 [ 30.934927] __x64_sys_munmap+0x59/0x80 [ 30.935428] do_syscall_64+0x3f/0x90 [ 30.935913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.936594] [ 30.936819] The buggy address belongs to the object at ffff888015ff6bc8 [ 30.936819] which belongs to the cache vm_area_struct of size 168 [ 30.938291] The buggy address is located 88 bytes inside of [ 30.938291] freed 168-byte region [ffff888015ff6bc8, ffff888015ff6c70) [ 30.939716] [ 30.939930] The buggy address belongs to the physical page: [ 30.940611] page:00000000ce4b5aee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15ff6 [ 30.941715] memcg:ffff888016a1d501 [ 30.942137] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.942782] page_type: 0xffffffff() [ 30.943231] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.944181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a1d501 [ 30.945103] page dumped because: kasan: bad access detected [ 30.945790] [ 30.946009] Memory state around the buggy address: [ 30.946587] ffff888015ff6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.947444] ffff888015ff6b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.948299] >ffff888015ff6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.949154] ^ [ 30.949682] ffff888015ff6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.950543] ffff888015ff6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.951391] ================================================================== [ 30.952311] Disabling lock debugging due to kernel taint [ 32.946879] BUG: Bad rss-counter state mm:00000000eca85e1f type:MM_FILEPAGES val:33 [ 32.947573] BUG: Bad rss-counter state mm:00000000eca85e1f type:MM_ANONPAGES val:22 [ 33.362112] BUG: Bad rss-counter state mm:000000009ceabfc9 type:MM_FILEPAGES val:33 [ 33.362823] BUG: Bad rss-counter state mm:000000009ceabfc9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49682' (ECDSA) to the list of known hosts. 2023/06/20 15:32:53 fuzzer started 2023/06/20 15:32:54 dialing manager at localhost:36067 2023/06/20 15:32:54 checking machine... 2023/06/20 15:32:54 checking revisions... [ 34.097030] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:32:54 testing simple program... [ 34.171508] cgroup: Unknown subsys name 'net' [ 34.231015] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:32:53 Registers: info registers vcpu 0 RAX=ffff8880144143f8 RBX=ffff88800ed753f8 RCX=1ffff11001b7ca14 RDX=dffffc0000000000 RSI=ffff88800cc48450 RDI=ffff88800ed75428 RBP=ffff88800ed75408 RSP=ffff8880180efc68 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800cc48280 R13=0000000000000000 R14=ffff888016ea9508 R15=ffff888016ea94c0 RIP=ffffffff818476cc RFL=00000046 [---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 00007fbf6f29b900 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=00007ffdf844d000 CR3=0000000009d4c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f4f3c72bdd0 CR3=000000000cafa000 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=1cf01e53604c919737431a5b3f0d803b XMM02=000000000011b308eff9b2d0a8fce9cb XMM03=000000000011b3d82c67c8bc2e329bc3 XMM04=e651e530822a30f600000000000ae988 XMM05=19e9129bd510f2350000000000131ee0 XMM06=4a2f5156faec1ab20000000000130d48 XMM07=e042d86d42eb936e0000000000122300 XMM08=d06f0107af54af51000000000011b3d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000