syzkaller login: [ 30.544857] BUG: Bad rss-counter state mm:00000000e7a1c584 type:MM_FILEPAGES val:33 [ 30.546316] BUG: Bad rss-counter state mm:00000000e7a1c584 type:MM_ANONPAGES val:22 [ 30.709546] ================================================================== [ 30.710549] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.711553] Read of size 8 at addr ffff88800df93798 by task sshd/219 [ 30.712572] [ 30.712808] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.713751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.714785] Call Trace: [ 30.715123] [ 30.715424] dump_stack_lvl+0x91/0xf0 [ 30.715950] print_report+0xcc/0x620 [ 30.716458] ? __virt_addr_valid+0x102/0x340 [ 30.717062] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717719] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718375] kasan_report+0xbe/0xf0 [ 30.718882] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.719554] vma_interval_tree_remove+0xc75/0xec0 [ 30.720209] vma_prepare+0xc54/0x11a0 [ 30.720732] __split_vma+0x5af/0x950 [ 30.721256] ? __pfx___split_vma+0x10/0x10 [ 30.721839] ? find_held_lock+0x2c/0x110 [ 30.722412] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.723029] ? lock_is_held_type+0x9f/0x120 [ 30.723621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.724280] ? mtree_range_walk+0x632/0x900 [ 30.724884] ? mas_walk+0x5c7/0x7c0 [ 30.725423] do_vmi_munmap+0x1f1/0x2b0 [ 30.725964] mmap_region+0x1f9/0x2660 [ 30.726495] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.727048] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.727826] ? __pfx_lock_acquire+0x10/0x10 [ 30.728400] ? __pfx_mmap_region+0x10/0x10 [ 30.728984] ? security_mmap_addr+0x7d/0xa0 [ 30.729555] ? get_unmapped_area+0x1f5/0x3f0 [ 30.730157] do_mmap+0x854/0xf00 [ 30.730637] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.731166] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.731776] ksys_mmap_pgoff+0x3af/0x500 [ 30.732327] do_syscall_64+0x3f/0x90 [ 30.732853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.733572] RIP: 0033:0x7fe350596d82 [ 30.734069] 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 [ 30.736353] RSP: 002b:00007ffeddba20a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.737337] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe350596d82 [ 30.738247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe34f9d0000 [ 30.739166] RBP: 00007fe34f9d0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.740125] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556bd7080ec0 [ 30.741061] R13: 00007ffeddba20c0 R14: 00007ffeddba20f0 R15: 00007ffeddba2450 [ 30.741987] [ 30.742297] [ 30.742522] Allocated by task 212: [ 30.742975] kasan_save_stack+0x22/0x50 [ 30.743518] kasan_set_track+0x25/0x30 [ 30.744045] __kasan_slab_alloc+0x59/0x70 [ 30.744603] kmem_cache_alloc+0x16b/0x370 [ 30.745161] vm_area_dup+0x20/0x160 [ 30.745634] __split_vma+0x170/0x950 [ 30.746124] split_vma+0xc6/0x110 [ 30.746584] mprotect_fixup+0x8d2/0xb30 [ 30.747102] do_mprotect_pkey+0x87e/0xd40 [ 30.747653] __x64_sys_mprotect+0x78/0xc0 [ 30.748199] do_syscall_64+0x3f/0x90 [ 30.748694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.749378] [ 30.749607] Freed by task 212: [ 30.750030] kasan_save_stack+0x22/0x50 [ 30.750567] kasan_set_track+0x25/0x30 [ 30.751092] kasan_save_free_info+0x2b/0x50 [ 30.751659] __kasan_slab_free+0x10a/0x190 [ 30.752228] kmem_cache_free+0x10d/0x4d0 [ 30.752776] rcu_core+0x8c8/0x2860 [ 30.753263] __do_softirq+0x1b7/0x7d4 [ 30.753829] [ 30.754058] Last potentially related work creation: [ 30.754675] kasan_save_stack+0x22/0x50 [ 30.755202] __kasan_record_aux_stack+0x8e/0xa0 [ 30.755802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.756476] remove_vma+0x139/0x170 [ 30.756964] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.757552] do_vmi_munmap+0x1f1/0x2b0 [ 30.758073] __vm_munmap+0x138/0x3a0 [ 30.758568] __x64_sys_munmap+0x59/0x80 [ 30.759095] do_syscall_64+0x3f/0x90 [ 30.759594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.760259] [ 30.760482] The buggy address belongs to the object at ffff88800df93740 [ 30.760482] which belongs to the cache vm_area_struct of size 168 [ 30.762035] The buggy address is located 88 bytes inside of [ 30.762035] freed 168-byte region [ffff88800df93740, ffff88800df937e8) [ 30.763517] [ 30.763744] The buggy address belongs to the physical page: [ 30.764442] page:0000000019e9abc6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf93 [ 30.765584] memcg:ffff88800d63fc01 [ 30.766033] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.766763] page_type: 0xffffffff() [ 30.767234] raw: 0100000000000200 ffff8880087a0c80 ffffea0000336f00 dead000000000005 [ 30.768181] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d63fc01 [ 30.769143] page dumped because: kasan: bad access detected [ 30.769827] [ 30.770056] Memory state around the buggy address: [ 30.770662] ffff88800df93680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.771549] ffff88800df93700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.772434] >ffff88800df93780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.773334] ^ [ 30.773846] ffff88800df93800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.774730] ffff88800df93880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.775624] ================================================================== [ 30.776642] Disabling lock debugging due to kernel taint [ 32.745425] BUG: Bad rss-counter state mm:0000000095f3f386 type:MM_FILEPAGES val:33 [ 32.746491] BUG: Bad rss-counter state mm:0000000095f3f386 type:MM_ANONPAGES val:22 [ 33.209237] BUG: Bad rss-counter state mm:000000003f5acbba type:MM_FILEPAGES val:33 [ 33.210239] BUG: Bad rss-counter state mm:000000003f5acbba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29222' (ECDSA) to the list of known hosts. 2023/06/20 19:11:59 fuzzer started 2023/06/20 19:12:00 dialing manager at localhost:36067 2023/06/20 19:12:00 checking machine... 2023/06/20 19:12:00 checking revisions... [ 33.992378] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:12:00 testing simple program... [ 34.041825] cgroup: Unknown subsys name 'net' [ 34.091132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:11:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888010671280 RCX=0000000000000000 RDX=ffff8880159ad1c0 RSI=ffffffff81f30f0c RDI=ffff888010670e70 RBP=ffff8880145cfc38 RSP=ffff8880145cfa58 R8 =0000000000000005 R9 =000000000000017f R10=0000000000000170 R11=0000000000000000 R12=ffff88800f60d808 R13=ffff8880145cfc3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f4d51e RFL=00000293 [--S-A-C] 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 00007fad7306c900 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=00007ffef19b3000 CR3=000000000e362000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007feec28643c0 CR3=00000000144d4000 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=fa004b2fe1d9208ef443eaf85c1a610b XMM02=000000000011af08eff9b2d0a8fce9cb XMM03=000000000011afd82c67c8bc2e329bc3 XMM04=bfdd1fbbcbb72e2400000000000ae988 XMM05=dfcdbad4f1609c370000000000131138 XMM06=806171799158d9670000000000130fc0 XMM07=e042d86d42eb936e00000000001214e0 XMM08=88d3a84d5eb1e1e6000000000011afd8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000