syzkaller login: [ 34.433823] BUG: Bad rss-counter state mm:00000000a3a212fc type:MM_FILEPAGES val:33 [ 34.435036] BUG: Bad rss-counter state mm:00000000a3a212fc type:MM_ANONPAGES val:22 [ 34.472336] ================================================================== [ 34.473307] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.474335] Read of size 8 at addr ffff888019e403f8 by task sshd/220 [ 34.475148] [ 34.475377] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.476288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.477314] Call Trace: [ 34.477651] [ 34.477962] dump_stack_lvl+0x91/0xf0 [ 34.478491] print_report+0xcc/0x620 [ 34.479008] ? __virt_addr_valid+0x102/0x340 [ 34.479584] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.480245] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.480901] kasan_report+0xbe/0xf0 [ 34.481402] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.482067] vma_interval_tree_remove+0xc75/0xec0 [ 34.482718] vma_prepare+0xc54/0x11a0 [ 34.483373] __split_vma+0x5af/0x950 [ 34.483952] ? __pfx___split_vma+0x10/0x10 [ 34.484511] ? find_held_lock+0x2c/0x110 [ 34.485068] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.485665] ? lock_is_held_type+0x9f/0x120 [ 34.486240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.486880] ? mtree_range_walk+0x632/0x900 [ 34.487461] ? mas_walk+0x5c7/0x7c0 [ 34.487970] do_vmi_munmap+0x1f1/0x2b0 [ 34.488489] mmap_region+0x1f9/0x2660 [ 34.488997] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.489538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.490304] ? __pfx_lock_acquire+0x10/0x10 [ 34.490866] ? __pfx_mmap_region+0x10/0x10 [ 34.491435] ? security_mmap_addr+0x7d/0xa0 [ 34.492011] ? get_unmapped_area+0x1f5/0x3f0 [ 34.492594] do_mmap+0x854/0xf00 [ 34.493067] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.493594] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.494191] ksys_mmap_pgoff+0x3af/0x500 [ 34.494754] do_syscall_64+0x3f/0x90 [ 34.495263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.495949] RIP: 0033:0x7f14ad01cd82 [ 34.496431] 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 [ 34.498685] RSP: 002b:00007ffee6c286d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.499643] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14ad01cd82 [ 34.500541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f14ac456000 [ 34.501437] RBP: 00007f14ac456000 R08: 0000000000000009 R09: 0000000000001000 [ 34.502338] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ad7ae91ec0 [ 34.503236] R13: 00007ffee6c286f0 R14: 00007ffee6c28720 R15: 00007ffee6c28a80 [ 34.504144] [ 34.504452] [ 34.504681] Allocated by task 213: [ 34.505138] kasan_save_stack+0x22/0x50 [ 34.505674] kasan_set_track+0x25/0x30 [ 34.506217] __kasan_slab_alloc+0x59/0x70 [ 34.506778] kmem_cache_alloc+0x16b/0x370 [ 34.507331] vm_area_dup+0x20/0x160 [ 34.507812] __split_vma+0x170/0x950 [ 34.508307] split_vma+0xc6/0x110 [ 34.508772] mprotect_fixup+0x8d2/0xb30 [ 34.509302] do_mprotect_pkey+0x87e/0xd40 [ 34.509863] __x64_sys_mprotect+0x78/0xc0 [ 34.510427] do_syscall_64+0x3f/0x90 [ 34.510933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.511616] [ 34.511850] Freed by task 213: [ 34.512266] kasan_save_stack+0x22/0x50 [ 34.512798] kasan_set_track+0x25/0x30 [ 34.513331] kasan_save_free_info+0x2b/0x50 [ 34.513897] __kasan_slab_free+0x10a/0x190 [ 34.514473] kmem_cache_free+0x10d/0x4d0 [ 34.515013] rcu_core+0x8c8/0x2860 [ 34.515484] __do_softirq+0x1b7/0x7d4 [ 34.515995] [ 34.516224] Last potentially related work creation: [ 34.516846] kasan_save_stack+0x22/0x50 [ 34.517378] __kasan_record_aux_stack+0x8e/0xa0 [ 34.517986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.518684] remove_vma+0x139/0x170 [ 34.519158] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.519747] do_vmi_munmap+0x1f1/0x2b0 [ 34.520260] __vm_munmap+0x138/0x3a0 [ 34.520754] __x64_sys_munmap+0x59/0x80 [ 34.521278] do_syscall_64+0x3f/0x90 [ 34.521778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.522466] [ 34.522697] The buggy address belongs to the object at ffff888019e403a0 [ 34.522697] which belongs to the cache vm_area_struct of size 168 [ 34.524252] The buggy address is located 88 bytes inside of [ 34.524252] freed 168-byte region [ffff888019e403a0, ffff888019e40448) [ 34.525804] [ 34.526050] The buggy address belongs to the physical page: [ 34.526790] page:00000000a4a5a17c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e40 [ 34.527968] memcg:ffff888019e41001 [ 34.528505] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.529203] page_type: 0xffffffff() [ 34.529685] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.530688] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e41001 [ 34.531659] page dumped because: kasan: bad access detected [ 34.532369] [ 34.532597] Memory state around the buggy address: [ 34.533228] ffff888019e40280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.534149] ffff888019e40300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.535068] >ffff888019e40380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.535976] ^ [ 34.536908] ffff888019e40400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.537847] ffff888019e40480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.538810] ================================================================== [ 34.539970] Disabling lock debugging due to kernel taint [ 36.526475] BUG: Bad rss-counter state mm:00000000cc95b991 type:MM_FILEPAGES val:33 [ 36.527402] BUG: Bad rss-counter state mm:00000000cc95b991 type:MM_ANONPAGES val:22 [ 36.991805] BUG: Bad rss-counter state mm:00000000848423fe type:MM_FILEPAGES val:33 [ 36.992748] BUG: Bad rss-counter state mm:00000000848423fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39126' (ECDSA) to the list of known hosts. 2023/06/19 19:37:52 fuzzer started 2023/06/19 19:37:52 dialing manager at localhost:44161 2023/06/19 19:37:52 checking machine... 2023/06/19 19:37:52 checking revisions... [ 37.688750] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:37:52 testing simple program... [ 37.743408] cgroup: Unknown subsys name 'net' [ 37.804216] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0005fe80ab9c73cf RCX=0000000000000000 RDX=00000000ffffffff RSI=ffffffffffffffff RDI=000055f79b43dc70 RBP=000055f79b440360 RSP=00007ffda2b23af0 R8 =000000006490ae8f R9 =00007ffda2bf4080 R10=00007ffda2bf4080 R11=0000000000000202 R12=0000000000000000 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=00007f07ecdd6bc3 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f07ec25d900 00000000 00000000 GS =0000 0000000000000000 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=00007f07eb76e008 CR3=000000000d84e000 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=0c2b80a1b6c4fcbc7f499270775dd0b3 XMM02=000000000011d120eff9b2d0a8fce9cb XMM03=000000000011d1f02c67c8bc2e329bc3 XMM04=7638829a519db2da00000000000ae988 XMM05=19e9129bd510f2350000000000134160 XMM06=431c75b180bd06b00000000000132fc8 XMM07=e042d86d42eb936e00000000001248d0 XMM08=d80e6345cfac08a3000000000011d1f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffccb36bb18 CR3=000000000ed76000 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=2031353a37333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a37333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000