syzkaller login: [ 61.422914] BUG: Bad rss-counter state mm:000000002eb85846 type:MM_FILEPAGES val:33 [ 61.424210] BUG: Bad rss-counter state mm:000000002eb85846 type:MM_ANONPAGES val:22 [ 61.464161] ================================================================== [ 61.465080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.466251] Read of size 8 at addr ffff88800d8f4ed8 by task sshd/229 [ 61.467034] [ 61.467260] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.468153] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.469149] Call Trace: [ 61.469489] [ 61.469779] dump_stack_lvl+0x91/0xf0 [ 61.470287] print_report+0xcc/0x620 [ 61.470786] ? __virt_addr_valid+0x102/0x340 [ 61.471359] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.471984] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.472617] kasan_report+0xbe/0xf0 [ 61.473099] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.473753] vma_interval_tree_remove+0xc75/0xec0 [ 61.474364] vma_prepare+0xc54/0x11a0 [ 61.474849] __split_vma+0x5af/0x950 [ 61.475336] ? __pfx___split_vma+0x10/0x10 [ 61.475874] ? find_held_lock+0x2c/0x110 [ 61.476411] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.476989] ? lock_is_held_type+0x9f/0x120 [ 61.477558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.478179] ? mtree_range_walk+0x632/0x900 [ 61.478747] ? mas_walk+0x5c7/0x7c0 [ 61.479233] do_vmi_munmap+0x1f1/0x2b0 [ 61.479742] mmap_region+0x1f9/0x2660 [ 61.480232] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.480763] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.481515] ? __pfx_lock_acquire+0x10/0x10 [ 61.482060] ? __pfx_mmap_region+0x10/0x10 [ 61.482608] ? security_mmap_addr+0x7d/0xa0 [ 61.483157] ? get_unmapped_area+0x1f5/0x3f0 [ 61.483728] do_mmap+0x854/0xf00 [ 61.484177] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.484688] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.485269] ksys_mmap_pgoff+0x3af/0x500 [ 61.485791] do_syscall_64+0x3f/0x90 [ 61.486280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.486942] RIP: 0033:0x7fa7b9c4dd82 [ 61.487416] 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 [ 61.489600] RSP: 002b:00007ffd2f97be88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.490525] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7b9c4dd82 [ 61.491394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7b9087000 [ 61.492261] RBP: 00007fa7b9087000 R08: 0000000000000009 R09: 0000000000001000 [ 61.493122] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e7be6cec0 [ 61.493989] R13: 00007ffd2f97bea0 R14: 00007ffd2f97bed0 R15: 00007ffd2f97c230 [ 61.494870] [ 61.495170] [ 61.495395] Allocated by task 222: [ 61.495830] kasan_save_stack+0x22/0x50 [ 61.496343] kasan_set_track+0x25/0x30 [ 61.496843] __kasan_slab_alloc+0x59/0x70 [ 61.497387] kmem_cache_alloc+0x16b/0x370 [ 61.497923] vm_area_dup+0x20/0x160 [ 61.498381] __split_vma+0x170/0x950 [ 61.498858] split_vma+0xc6/0x110 [ 61.499303] mprotect_fixup+0x8d2/0xb30 [ 61.499821] do_mprotect_pkey+0x87e/0xd40 [ 61.500376] __x64_sys_mprotect+0x78/0xc0 [ 61.500909] do_syscall_64+0x3f/0x90 [ 61.501404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.502058] [ 61.502275] Freed by task 222: [ 61.502667] kasan_save_stack+0x22/0x50 [ 61.503173] kasan_set_track+0x25/0x30 [ 61.503682] kasan_save_free_info+0x2b/0x50 [ 61.504243] __kasan_slab_free+0x10a/0x190 [ 61.504801] kmem_cache_free+0x10d/0x4d0 [ 61.505317] rcu_core+0x8c8/0x2860 [ 61.505766] __do_softirq+0x1b7/0x7d4 [ 61.506247] [ 61.506468] Last potentially related work creation: [ 61.507057] kasan_save_stack+0x22/0x50 [ 61.507574] __kasan_record_aux_stack+0x8e/0xa0 [ 61.508153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.508800] remove_vma+0x139/0x170 [ 61.509261] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.509841] do_vmi_munmap+0x1f1/0x2b0 [ 61.510341] __vm_munmap+0x138/0x3a0 [ 61.510819] __x64_sys_munmap+0x59/0x80 [ 61.511337] do_syscall_64+0x3f/0x90 [ 61.511818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.512516] [ 61.512741] The buggy address belongs to the object at ffff88800d8f4e80 [ 61.512741] which belongs to the cache vm_area_struct of size 168 [ 61.514252] The buggy address is located 88 bytes inside of [ 61.514252] freed 168-byte region [ffff88800d8f4e80, ffff88800d8f4f28) [ 61.515686] [ 61.515914] The buggy address belongs to the physical page: [ 61.516586] page:00000000242b9aa1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8f4 [ 61.517699] memcg:ffff888016b73101 [ 61.518137] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.518806] page_type: 0xffffffff() [ 61.519271] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.520203] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b73101 [ 61.521120] page dumped because: kasan: bad access detected [ 61.521804] [ 61.522025] Memory state around the buggy address: [ 61.522610] ffff88800d8f4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.523487] ffff88800d8f4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 61.524357] >ffff88800d8f4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.525224] ^ [ 61.525975] ffff88800d8f4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 61.526841] ffff88800d8f4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.527704] ================================================================== [ 61.528754] Disabling lock debugging due to kernel taint [ 63.465066] BUG: Bad rss-counter state mm:0000000054d045ca type:MM_FILEPAGES val:33 [ 63.466644] BUG: Bad rss-counter state mm:0000000054d045ca type:MM_ANONPAGES val:22 [ 64.033834] BUG: Bad rss-counter state mm:00000000bcc1b99c type:MM_FILEPAGES val:33 [ 64.035220] BUG: Bad rss-counter state mm:00000000bcc1b99c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7730' (ECDSA) to the list of known hosts. 2023/06/20 11:00:19 fuzzer started 2023/06/20 11:00:19 dialing manager at localhost:36067 2023/06/20 11:00:19 checking machine... 2023/06/20 11:00:19 checking revisions... [ 64.717545] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:00:20 testing simple program... [ 64.762815] cgroup: Unknown subsys name 'net' [ 64.802456] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:00:19 Registers: info registers vcpu 0 RAX=ffffffff863b3571 RBX=0000000000000001 RCX=ffffffff863b356c RDX=0000000000000000 RSI=1ffffffff0c766ae RDI=ffffffff85fa4f3c RBP=ffff8880194179d0 RSP=ffff888019417908 R8 =ffffffff863b353c R9 =ffff8880194179b8 R10=0000000000038001 R11=000000000008a95e R12=ffff8880194179d8 R13=ffff8880194179c0 R14=ffff8880194179b9 R15=ffff888019417978 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 00007f58dab32900 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=00007f58db0e7650 CR3=000000000dfde000 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=ffff888008c04400 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=00007ffd97851bf8 CR3=0000000015d94000 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=30303a3131203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3833325b646873732039313a3030 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000