syzkaller login: [ 28.836041] BUG: Bad rss-counter state mm:000000001f1a4729 type:MM_FILEPAGES val:33 [ 28.837439] BUG: Bad rss-counter state mm:000000001f1a4729 type:MM_ANONPAGES val:22 [ 28.877667] ================================================================== [ 28.878779] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.879841] Read of size 8 at addr ffff88800ddfab38 by task sshd/220 [ 28.880722] [ 28.880969] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.881946] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.883058] Call Trace: [ 28.883425] [ 28.883744] dump_stack_lvl+0x91/0xf0 [ 28.884306] print_report+0xcc/0x620 [ 28.884851] ? __virt_addr_valid+0x102/0x340 [ 28.885477] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.886173] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.886869] kasan_report+0xbe/0xf0 [ 28.887396] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888103] vma_interval_tree_remove+0xc75/0xec0 [ 28.888807] vma_prepare+0xc54/0x11a0 [ 28.889351] __split_vma+0x5af/0x950 [ 28.889891] ? __pfx___split_vma+0x10/0x10 [ 28.890480] ? find_held_lock+0x2c/0x110 [ 28.891064] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.891702] ? lock_is_held_type+0x9f/0x120 [ 28.892317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.892991] ? mtree_range_walk+0x632/0x900 [ 28.893615] ? mas_walk+0x5c7/0x7c0 [ 28.894157] do_vmi_munmap+0x1f1/0x2b0 [ 28.894706] mmap_region+0x1f9/0x2660 [ 28.895238] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.895813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.896623] ? __pfx_lock_acquire+0x10/0x10 [ 28.897222] ? __pfx_mmap_region+0x10/0x10 [ 28.897815] ? security_mmap_addr+0x7d/0xa0 [ 28.898417] ? get_unmapped_area+0x1f5/0x3f0 [ 28.899031] do_mmap+0x854/0xf00 [ 28.899523] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.900077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.900733] ksys_mmap_pgoff+0x3af/0x500 [ 28.901308] do_syscall_64+0x3f/0x90 [ 28.901859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.902598] RIP: 0033:0x7f1de176cd82 [ 28.903124] 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 [ 28.905651] RSP: 002b:00007ffed4a4e108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.906680] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1de176cd82 [ 28.907630] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1de0ba6000 [ 28.908602] RBP: 00007f1de0ba6000 R08: 0000000000000009 R09: 0000000000001000 [ 28.909559] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a70c3dcd90 [ 28.910504] R13: 00007ffed4a4e120 R14: 00007ffed4a4e150 R15: 00007ffed4a4e4b0 [ 28.911456] [ 28.911787] [ 28.912031] Allocated by task 213: [ 28.912520] kasan_save_stack+0x22/0x50 [ 28.913061] kasan_set_track+0x25/0x30 [ 28.913593] __kasan_slab_alloc+0x59/0x70 [ 28.914162] kmem_cache_alloc+0x16b/0x370 [ 28.914719] vm_area_dup+0x20/0x160 [ 28.915200] __split_vma+0x170/0x950 [ 28.915701] split_vma+0xc6/0x110 [ 28.916173] mprotect_fixup+0x8d2/0xb30 [ 28.916715] do_mprotect_pkey+0x87e/0xd40 [ 28.917272] __x64_sys_mprotect+0x78/0xc0 [ 28.917825] do_syscall_64+0x3f/0x90 [ 28.918332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.919016] [ 28.919244] Freed by task 213: [ 28.919671] kasan_save_stack+0x22/0x50 [ 28.920204] kasan_set_track+0x25/0x30 [ 28.920742] kasan_save_free_info+0x2b/0x50 [ 28.921303] __kasan_slab_free+0x10a/0x190 [ 28.921871] kmem_cache_free+0x10d/0x4d0 [ 28.922415] rcu_core+0x8c8/0x2860 [ 28.922887] __do_softirq+0x1b7/0x7d4 [ 28.923400] [ 28.923631] Last potentially related work creation: [ 28.924247] kasan_save_stack+0x22/0x50 [ 28.924797] __kasan_record_aux_stack+0x8e/0xa0 [ 28.925405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.926096] remove_vma+0x139/0x170 [ 28.926575] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.927172] do_vmi_munmap+0x1f1/0x2b0 [ 28.927689] __vm_munmap+0x138/0x3a0 [ 28.928189] __x64_sys_munmap+0x59/0x80 [ 28.928740] do_syscall_64+0x3f/0x90 [ 28.929247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929946] [ 28.930172] Second to last potentially related work creation: [ 28.930892] kasan_save_stack+0x22/0x50 [ 28.931429] __kasan_record_aux_stack+0x8e/0xa0 [ 28.932040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.932734] remove_vma+0x139/0x170 [ 28.933214] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.933810] do_vmi_munmap+0x1f1/0x2b0 [ 28.934329] mmap_region+0x1f9/0x2660 [ 28.934847] do_mmap+0x854/0xf00 [ 28.935309] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.935842] ksys_mmap_pgoff+0x3af/0x500 [ 28.936386] do_syscall_64+0x3f/0x90 [ 28.936895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.937582] [ 28.937817] The buggy address belongs to the object at ffff88800ddfaae0 [ 28.937817] which belongs to the cache vm_area_struct of size 168 [ 28.939410] The buggy address is located 88 bytes inside of [ 28.939410] freed 168-byte region [ffff88800ddfaae0, ffff88800ddfab88) [ 28.940930] [ 28.941158] The buggy address belongs to the physical page: [ 28.941859] page:000000003960c3dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddfa [ 28.943012] memcg:ffff88800e286501 [ 28.943461] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.944151] page_type: 0xffffffff() [ 28.944640] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ba480 dead000000000002 [ 28.945611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e286501 [ 28.946588] page dumped because: kasan: bad access detected [ 28.947302] [ 28.947538] Memory state around the buggy address: [ 28.948169] ffff88800ddfaa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.949108] ffff88800ddfaa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 28.950039] >ffff88800ddfab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.950959] ^ [ 28.951629] ffff88800ddfab80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 28.952566] ffff88800ddfac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.953487] ================================================================== [ 28.955111] Disabling lock debugging due to kernel taint [ 31.346666] BUG: Bad rss-counter state mm:00000000a741a708 type:MM_FILEPAGES val:33 [ 31.347940] BUG: Bad rss-counter state mm:00000000a741a708 type:MM_ANONPAGES val:22 [ 31.768948] BUG: Bad rss-counter state mm:000000008a028eaf type:MM_FILEPAGES val:33 [ 31.770193] BUG: Bad rss-counter state mm:000000008a028eaf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43729' (ECDSA) to the list of known hosts. 2023/06/20 21:53:33 fuzzer started 2023/06/20 21:53:34 dialing manager at localhost:36067 2023/06/20 21:53:34 checking machine... 2023/06/20 21:53:34 checking revisions... [ 32.390963] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:53:34 testing simple program... [ 32.437172] cgroup: Unknown subsys name 'net' [ 32.477258] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:53:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=1ffff1100d9c1358 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff86138e90 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=0000000000000005 R15=ffff88806ce09a78 RIP=ffffffff81130b54 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 00007f9840675900 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=00007f9840c2a650 CR3=000000001bc40000 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=00007f1da97a6f00 CR3=000000000ef44000 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=7434182631fb84af0a4d3df0cee45f38 XMM02=000000000011da30ec2efd57dc4c00df XMM03=00000000001221d0b8349f614df25f87 XMM04=bf185b8b11cc998800000000000ae988 XMM05=19e9129bd510f23500000000001332f0 XMM06=15bb372da07a0f280000000000132158 XMM07=e042d86d42eb936e0000000000122450 XMM08=b8349f614df25f87000000000011da90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000