syzkaller login: [ 31.523611] BUG: Bad rss-counter state mm:00000000368865ff type:MM_FILEPAGES val:33 [ 31.524873] BUG: Bad rss-counter state mm:00000000368865ff type:MM_ANONPAGES val:22 [ 31.562752] ================================================================== [ 31.563755] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.564682] Read of size 8 at addr ffff88800f24a6b0 by task sshd/220 [ 31.565454] [ 31.565684] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.566557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.567527] Call Trace: [ 31.567849] [ 31.568133] dump_stack_lvl+0x91/0xf0 [ 31.568629] print_report+0xcc/0x620 [ 31.569105] ? __virt_addr_valid+0x102/0x340 [ 31.569672] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.570293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.570917] kasan_report+0xbe/0xf0 [ 31.571396] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.572025] vma_interval_tree_remove+0xc75/0xec0 [ 31.572633] vma_prepare+0xc54/0x11a0 [ 31.573111] __split_vma+0x5af/0x950 [ 31.573599] ? __pfx___split_vma+0x10/0x10 [ 31.574126] ? find_held_lock+0x2c/0x110 [ 31.574642] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.575208] ? lock_is_held_type+0x9f/0x120 [ 31.575739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.576341] ? mtree_range_walk+0x632/0x900 [ 31.576891] ? mas_walk+0x5c7/0x7c0 [ 31.577361] do_vmi_munmap+0x1f1/0x2b0 [ 31.577858] mmap_region+0x1f9/0x2660 [ 31.578342] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.578848] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.579589] ? __pfx_lock_acquire+0x10/0x10 [ 31.580130] ? __pfx_mmap_region+0x10/0x10 [ 31.580664] ? security_mmap_addr+0x7d/0xa0 [ 31.581192] ? get_unmapped_area+0x1f5/0x3f0 [ 31.581753] do_mmap+0x854/0xf00 [ 31.582194] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.582687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.583247] ksys_mmap_pgoff+0x3af/0x500 [ 31.583752] do_syscall_64+0x3f/0x90 [ 31.584233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.584884] RIP: 0033:0x7ff7cc2e4d82 [ 31.585337] 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 [ 31.587449] RSP: 002b:00007fffd91f94b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.588379] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7cc2e4d82 [ 31.589226] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7cb71e000 [ 31.590189] RBP: 00007ff7cb71e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.591090] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594357c1d90 [ 31.591935] R13: 00007fffd91f94d0 R14: 00007fffd91f9500 R15: 00007fffd91f9860 [ 31.592801] [ 31.593095] [ 31.593311] Allocated by task 213: [ 31.593745] kasan_save_stack+0x22/0x50 [ 31.594245] kasan_set_track+0x25/0x30 [ 31.594733] __kasan_slab_alloc+0x59/0x70 [ 31.595253] kmem_cache_alloc+0x16b/0x370 [ 31.595766] vm_area_dup+0x20/0x160 [ 31.596215] __split_vma+0x170/0x950 [ 31.596696] split_vma+0xc6/0x110 [ 31.597143] mprotect_fixup+0x8d2/0xb30 [ 31.597655] do_mprotect_pkey+0x87e/0xd40 [ 31.598176] __x64_sys_mprotect+0x78/0xc0 [ 31.598700] do_syscall_64+0x3f/0x90 [ 31.599179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.599814] [ 31.600032] Freed by task 213: [ 31.600422] kasan_save_stack+0x22/0x50 [ 31.600926] kasan_set_track+0x25/0x30 [ 31.601426] kasan_save_free_info+0x2b/0x50 [ 31.601968] __kasan_slab_free+0x10a/0x190 [ 31.602503] kmem_cache_free+0x10d/0x4d0 [ 31.603010] rcu_core+0x8c8/0x2860 [ 31.603453] __do_softirq+0x1b7/0x7d4 [ 31.603933] [ 31.604148] Last potentially related work creation: [ 31.604736] kasan_save_stack+0x22/0x50 [ 31.605241] __kasan_record_aux_stack+0x8e/0xa0 [ 31.605825] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.606465] remove_vma+0x139/0x170 [ 31.606920] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.607469] do_vmi_munmap+0x1f1/0x2b0 [ 31.607952] __vm_munmap+0x138/0x3a0 [ 31.608414] __x64_sys_munmap+0x59/0x80 [ 31.608913] do_syscall_64+0x3f/0x90 [ 31.609384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.610029] [ 31.610243] Second to last potentially related work creation: [ 31.610916] kasan_save_stack+0x22/0x50 [ 31.611417] __kasan_record_aux_stack+0x8e/0xa0 [ 31.611987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.612622] remove_vma+0x139/0x170 [ 31.613074] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.613645] do_vmi_munmap+0x1f1/0x2b0 [ 31.614130] mmap_region+0x1f9/0x2660 [ 31.614602] do_mmap+0x854/0xf00 [ 31.615035] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.615518] ksys_mmap_pgoff+0x3af/0x500 [ 31.616023] do_syscall_64+0x3f/0x90 [ 31.616491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.617124] [ 31.617341] The buggy address belongs to the object at ffff88800f24a658 [ 31.617341] which belongs to the cache vm_area_struct of size 168 [ 31.618809] The buggy address is located 88 bytes inside of [ 31.618809] freed 168-byte region [ffff88800f24a658, ffff88800f24a700) [ 31.620203] [ 31.620415] The buggy address belongs to the physical page: [ 31.621076] page:0000000022d4f4e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf24a [ 31.622185] memcg:ffff888016565f01 [ 31.622614] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.623250] page_type: 0xffffffff() [ 31.623692] raw: 0100000000000200 ffff88800879fc80 ffffea0000383480 dead000000000008 [ 31.624607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016565f01 [ 31.625502] page dumped because: kasan: bad access detected [ 31.626168] [ 31.626384] Memory state around the buggy address: [ 31.626965] ffff88800f24a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.627813] ffff88800f24a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.628668] >ffff88800f24a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.629513] ^ [ 31.630113] ffff88800f24a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.630972] ffff88800f24a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.631820] ================================================================== [ 31.632897] Disabling lock debugging due to kernel taint [ 33.505744] BUG: Bad rss-counter state mm:00000000fc9fc674 type:MM_FILEPAGES val:33 [ 33.506796] BUG: Bad rss-counter state mm:00000000fc9fc674 type:MM_ANONPAGES val:22 [ 33.977088] BUG: Bad rss-counter state mm:000000001dbac6f0 type:MM_FILEPAGES val:33 [ 33.978089] BUG: Bad rss-counter state mm:000000001dbac6f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64182' (ECDSA) to the list of known hosts. 2023/06/19 12:55:07 fuzzer started 2023/06/19 12:55:08 dialing manager at localhost:44161 2023/06/19 12:55:08 checking machine... 2023/06/19 12:55:08 checking revisions... [ 34.772821] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:55:08 testing simple program... [ 34.833176] cgroup: Unknown subsys name 'net' [ 34.892546] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:55:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b15f4 RDX=1ffff11001d22eaa RSI=1ffff11001d22ea8 RDI=ffff88800e917550 RBP=ffff88800e917540 RSP=ffff88800e917478 R8 =ffffffff863b15f8 R9 =ffff88800e917528 R10=0000000000038001 R11=000000000008a85c R12=ffff88800e917548 R13=ffff88800e917530 R14=ffff88800e917cb0 R15=ffff88800e9174e8 RIP=ffffffff811310f5 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 00007f5d58a4d700 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=00007fa666d140b0 CR3=0000000015c8e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037303a3535 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363633 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f9f6fc790d0 CR3=000000000c508000 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=8d298e38e589c2b812476c9caadfed42 XMM02=000000000011d030ec2efd57dc4c00df XMM03=00000000001245700488d603567bfb1e XMM04=16e560727f74aa9600000000000ae988 XMM05=19e9129bd510f23500000000001354b8 XMM06=4fda316b135da52b0000000000135340 XMM07=e042d86d42eb936e00000000001247f0 XMM08=0488d603567bfb1e000000000011d090 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000