syzkaller login: [ 32.153836] BUG: Bad rss-counter state mm:00000000fba0c07f type:MM_FILEPAGES val:33 [ 32.155545] BUG: Bad rss-counter state mm:00000000fba0c07f type:MM_ANONPAGES val:22 [ 32.319439] ================================================================== [ 32.320604] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.321855] Read of size 8 at addr ffff888010260d08 by task sshd/218 [ 32.322890] [ 32.323156] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.324083] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.325088] Call Trace: [ 32.325406] [ 32.325697] dump_stack_lvl+0x91/0xf0 [ 32.326187] print_report+0xcc/0x620 [ 32.326699] ? __virt_addr_valid+0x102/0x340 [ 32.327252] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.327869] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.328519] kasan_report+0xbe/0xf0 [ 32.329015] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.329670] vma_interval_tree_remove+0xc75/0xec0 [ 32.330309] vma_prepare+0xc54/0x11a0 [ 32.330829] __split_vma+0x5af/0x950 [ 32.331331] ? __pfx___split_vma+0x10/0x10 [ 32.331888] ? find_held_lock+0x2c/0x110 [ 32.332443] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.333040] ? lock_is_held_type+0x9f/0x120 [ 32.333604] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.334247] ? mtree_range_walk+0x632/0x900 [ 32.334861] ? mas_walk+0x5c7/0x7c0 [ 32.335357] do_vmi_munmap+0x1f1/0x2b0 [ 32.335879] mmap_region+0x1f9/0x2660 [ 32.336386] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.336926] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.337670] ? __pfx_lock_acquire+0x10/0x10 [ 32.338234] ? __pfx_mmap_region+0x10/0x10 [ 32.338793] ? security_mmap_addr+0x7d/0xa0 [ 32.339348] ? get_unmapped_area+0x1f5/0x3f0 [ 32.339933] do_mmap+0x854/0xf00 [ 32.340396] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.340920] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.341506] ksys_mmap_pgoff+0x3af/0x500 [ 32.342047] do_syscall_64+0x3f/0x90 [ 32.342563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.343244] RIP: 0033:0x7f212131ad82 [ 32.343719] 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 [ 32.345961] RSP: 002b:00007ffe48319648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.346923] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f212131ad82 [ 32.347811] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2120754000 [ 32.348707] RBP: 00007f2120754000 R08: 0000000000000009 R09: 0000000000001000 [ 32.349593] R10: 0000000000000812 R11: 0000000000000206 R12: 000056418e74b980 [ 32.350495] R13: 00007ffe48319660 R14: 00007ffe48319690 R15: 00007ffe483199f0 [ 32.351399] [ 32.351705] [ 32.351927] Allocated by task 211: [ 32.352373] kasan_save_stack+0x22/0x50 [ 32.352905] kasan_set_track+0x25/0x30 [ 32.353427] __kasan_slab_alloc+0x59/0x70 [ 32.353986] kmem_cache_alloc+0x16b/0x370 [ 32.354534] vm_area_dup+0x20/0x160 [ 32.355017] __split_vma+0x170/0x950 [ 32.355500] split_vma+0xc6/0x110 [ 32.355964] mprotect_fixup+0x8d2/0xb30 [ 32.356486] do_mprotect_pkey+0x87e/0xd40 [ 32.357039] __x64_sys_mprotect+0x78/0xc0 [ 32.357581] do_syscall_64+0x3f/0x90 [ 32.358068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.358758] [ 32.358983] Freed by task 211: [ 32.359397] kasan_save_stack+0x22/0x50 [ 32.359929] kasan_set_track+0x25/0x30 [ 32.360456] kasan_save_free_info+0x2b/0x50 [ 32.361014] __kasan_slab_free+0x10a/0x190 [ 32.361571] kmem_cache_free+0x10d/0x4d0 [ 32.362104] rcu_core+0x8c8/0x2860 [ 32.362582] __do_softirq+0x1b7/0x7d4 [ 32.363088] [ 32.363313] Last potentially related work creation: [ 32.363990] kasan_save_stack+0x22/0x50 [ 32.364509] __kasan_record_aux_stack+0x8e/0xa0 [ 32.365104] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.365773] remove_vma+0x139/0x170 [ 32.366248] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.366861] do_vmi_munmap+0x1f1/0x2b0 [ 32.367374] __vm_munmap+0x138/0x3a0 [ 32.367865] __x64_sys_munmap+0x59/0x80 [ 32.368393] do_syscall_64+0x3f/0x90 [ 32.368882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.369554] [ 32.369774] The buggy address belongs to the object at ffff888010260cb0 [ 32.369774] which belongs to the cache vm_area_struct of size 168 [ 32.371330] The buggy address is located 88 bytes inside of [ 32.371330] freed 168-byte region [ffff888010260cb0, ffff888010260d58) [ 32.372813] [ 32.373039] The buggy address belongs to the physical page: [ 32.373732] page:00000000f26dbd7f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10260 [ 32.374912] memcg:ffff88800e062101 [ 32.375360] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.376039] page_type: 0xffffffff() [ 32.376512] raw: 0100000000000200 ffff88800879fc80 ffffea000039f0c0 dead000000000008 [ 32.377489] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e062101 [ 32.378447] page dumped because: kasan: bad access detected [ 32.379149] [ 32.379374] Memory state around the buggy address: [ 32.380004] ffff888010260c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.380903] ffff888010260c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.381808] >ffff888010260d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.382717] ^ [ 32.383173] ffff888010260d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.384071] ffff888010260e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.384964] ================================================================== [ 32.386036] Disabling lock debugging due to kernel taint [ 35.311343] BUG: Bad rss-counter state mm:00000000763bc23f type:MM_FILEPAGES val:33 [ 35.312325] BUG: Bad rss-counter state mm:00000000763bc23f type:MM_ANONPAGES val:22 [ 35.876101] BUG: Bad rss-counter state mm:00000000494f7249 type:MM_FILEPAGES val:33 [ 35.877300] BUG: Bad rss-counter state mm:00000000494f7249 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4878' (ECDSA) to the list of known hosts. 2023/06/19 22:18:03 fuzzer started 2023/06/19 22:18:03 dialing manager at localhost:44161 2023/06/19 22:18:03 checking machine... 2023/06/19 22:18:03 checking revisions... [ 36.508835] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:18:03 testing simple program... [ 36.556171] cgroup: Unknown subsys name 'net' [ 36.591630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:17:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002c95fbe RCX=0000000000000000 RDX=ffff888016ad8000 RSI=ffffffff8363e797 RDI=ffff88800e652930 RBP=ffff88800885cac0 RSP=ffff8880164afde8 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800e652780 R11=0000000000000000 R12=000000000000000c R13=00007fffa9d38908 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c081b 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 00007f25c8afc900 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=00007fffa9d35000 CR3=000000000d592000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007fd3df7f7c20 CR3=000000000cbf2000 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=2033303a38313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000