syzkaller login: [ 28.892744] BUG: Bad rss-counter state mm:000000005fd1a3d7 type:MM_FILEPAGES val:33 [ 28.893968] BUG: Bad rss-counter state mm:000000005fd1a3d7 type:MM_ANONPAGES val:22 [ 28.938146] ================================================================== [ 28.939100] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.940099] Read of size 8 at addr ffff88800fbdea50 by task sshd/220 [ 28.940910] [ 28.941149] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.942060] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.943087] Call Trace: [ 28.943436] [ 28.943774] dump_stack_lvl+0x91/0xf0 [ 28.944300] print_report+0xcc/0x620 [ 28.944964] ? __virt_addr_valid+0x102/0x340 [ 28.945558] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.946212] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.946889] kasan_report+0xbe/0xf0 [ 28.947401] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.948080] vma_interval_tree_remove+0xc75/0xec0 [ 28.948731] vma_prepare+0xc54/0x11a0 [ 28.949251] __split_vma+0x5af/0x950 [ 28.949763] ? __pfx___split_vma+0x10/0x10 [ 28.950325] ? find_held_lock+0x2c/0x110 [ 28.950879] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.951504] ? lock_is_held_type+0x9f/0x120 [ 28.952088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.952738] ? mtree_range_walk+0x632/0x900 [ 28.953351] ? mas_walk+0x5c7/0x7c0 [ 28.953861] do_vmi_munmap+0x1f1/0x2b0 [ 28.954396] mmap_region+0x1f9/0x2660 [ 28.954933] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.955490] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.956270] ? __pfx_lock_acquire+0x10/0x10 [ 28.956837] ? __pfx_mmap_region+0x10/0x10 [ 28.957414] ? security_mmap_addr+0x7d/0xa0 [ 28.957988] ? get_unmapped_area+0x1f5/0x3f0 [ 28.958585] do_mmap+0x854/0xf00 [ 28.959055] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.959587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.960203] ksys_mmap_pgoff+0x3af/0x500 [ 28.960740] do_syscall_64+0x3f/0x90 [ 28.961254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.961946] RIP: 0033:0x7fc20b60dd82 [ 28.962433] 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 [ 28.964720] RSP: 002b:00007ffeb67eb348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.965679] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc20b60dd82 [ 28.966590] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc20aa47000 [ 28.967491] RBP: 00007fc20aa47000 R08: 0000000000000009 R09: 0000000000001000 [ 28.968397] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c3272cf70 [ 28.969307] R13: 00007ffeb67eb360 R14: 00007ffeb67eb390 R15: 00007ffeb67eb6f0 [ 28.970227] [ 28.970537] [ 28.970766] Allocated by task 212: [ 28.971224] kasan_save_stack+0x22/0x50 [ 28.971778] kasan_set_track+0x25/0x30 [ 28.972311] __kasan_slab_alloc+0x59/0x70 [ 28.972865] kmem_cache_alloc+0x16b/0x370 [ 28.973419] vm_area_dup+0x20/0x160 [ 28.973906] __split_vma+0x170/0x950 [ 28.974404] split_vma+0xc6/0x110 [ 28.974869] mprotect_fixup+0x8d2/0xb30 [ 28.975413] do_mprotect_pkey+0x87e/0xd40 [ 28.975981] __x64_sys_mprotect+0x78/0xc0 [ 28.976539] do_syscall_64+0x3f/0x90 [ 28.977042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.977730] [ 28.977958] Freed by task 212: [ 28.978373] kasan_save_stack+0x22/0x50 [ 28.978911] kasan_set_track+0x25/0x30 [ 28.979440] kasan_save_free_info+0x2b/0x50 [ 28.980015] __kasan_slab_free+0x10a/0x190 [ 28.980578] kmem_cache_free+0x10d/0x4d0 [ 28.981119] rcu_core+0x8c8/0x2860 [ 28.981591] __do_softirq+0x1b7/0x7d4 [ 28.982100] [ 28.982330] Last potentially related work creation: [ 28.982946] kasan_save_stack+0x22/0x50 [ 28.983480] __kasan_record_aux_stack+0x8e/0xa0 [ 28.984094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.984774] remove_vma+0x139/0x170 [ 28.985255] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.985849] do_vmi_munmap+0x1f1/0x2b0 [ 28.986373] __vm_munmap+0x138/0x3a0 [ 28.986875] __x64_sys_munmap+0x59/0x80 [ 28.987405] do_syscall_64+0x3f/0x90 [ 28.987927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.988614] [ 28.988842] The buggy address belongs to the object at ffff88800fbde9f8 [ 28.988842] which belongs to the cache vm_area_struct of size 168 [ 28.990403] The buggy address is located 88 bytes inside of [ 28.990403] freed 168-byte region [ffff88800fbde9f8, ffff88800fbdeaa0) [ 28.991892] [ 28.992124] The buggy address belongs to the physical page: [ 28.992822] page:000000003398dee1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbde [ 28.993976] memcg:ffff888016aff401 [ 28.994427] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.995106] page_type: 0xffffffff() [ 28.995583] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.996559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016aff401 [ 28.997526] page dumped because: kasan: bad access detected [ 28.998221] [ 28.998449] Memory state around the buggy address: [ 28.999063] ffff88800fbde900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.999985] ffff88800fbde980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.000890] >ffff88800fbdea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.001797] ^ [ 29.002569] ffff88800fbdea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.003519] ffff88800fbdeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.004461] ================================================================== [ 29.005639] Disabling lock debugging due to kernel taint [ 31.628434] BUG: Bad rss-counter state mm:000000002f8249a2 type:MM_FILEPAGES val:33 [ 31.630165] BUG: Bad rss-counter state mm:000000002f8249a2 type:MM_ANONPAGES val:22 [ 32.172754] BUG: Bad rss-counter state mm:000000008a2c228a type:MM_FILEPAGES val:33 [ 32.174040] BUG: Bad rss-counter state mm:000000008a2c228a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57797' (ECDSA) to the list of known hosts. 2023/06/21 06:12:20 fuzzer started 2023/06/21 06:12:20 dialing manager at localhost:36067 2023/06/21 06:12:20 checking machine... 2023/06/21 06:12:20 checking revisions... [ 32.746299] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:12:20 testing simple program... [ 32.790109] cgroup: Unknown subsys name 'net' [ 32.840175] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:12:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11003386f1e RDX=dffffc0000000000 RSI=ffff888019c37868 RDI=ffff888019c37898 RBP=ffff888019c378f0 RSP=ffff888019c377d8 R8 =0000000000000001 R9 =ffff888019c378d8 R10=0000000000038001 R11=0000000000006097 R12=ffff888019c378f8 R13=ffff888019c378e0 R14=ffff888019c378d9 R15=ffff888019c37898 RIP=ffffffff81130706 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 00007f74805e5900 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=00007f7480b9a650 CR3=000000000c5c2000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f8266b8b270 CR3=000000000d828000 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=9f95f74a8e920fb4e84c83a45aa7d6c4 XMM02=2c67c8bc2e329bc3000000000011c588 XMM03=fb795ef6d65770560000000000120a40 XMM04=22af1ba16194848500000000000ae988 XMM05=e4cb8bb95a7664b60000000000130f68 XMM06=9c015555ca8a4bdd000000000012f668 XMM07=e042d86d42eb936e0000000000120d18 XMM08=9e5269f094654b50000000000011c5e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000