syzkaller login: [ 61.460862] BUG: Bad rss-counter state mm:00000000d89a2e11 type:MM_FILEPAGES val:33 [ 61.462071] BUG: Bad rss-counter state mm:00000000d89a2e11 type:MM_ANONPAGES val:22 [ 61.632291] ================================================================== [ 61.633386] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.634508] Read of size 8 at addr ffff88801a047880 by task sshd/219 [ 61.635537] [ 61.635813] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.636842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.638132] Call Trace: [ 61.638536] [ 61.638891] dump_stack_lvl+0x91/0xf0 [ 61.639497] print_report+0xcc/0x620 [ 61.640114] ? __virt_addr_valid+0x102/0x340 [ 61.640795] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.641562] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.642329] kasan_report+0xbe/0xf0 [ 61.642919] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.643691] vma_interval_tree_remove+0xc75/0xec0 [ 61.644476] vma_prepare+0xc54/0x11a0 [ 61.645002] __split_vma+0x5af/0x950 [ 61.645464] ? __pfx___split_vma+0x10/0x10 [ 61.645974] ? find_held_lock+0x2c/0x110 [ 61.646485] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.647039] ? lock_is_held_type+0x9f/0x120 [ 61.647559] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.648166] ? mtree_range_walk+0x632/0x900 [ 61.648707] ? mas_walk+0x5c7/0x7c0 [ 61.649166] do_vmi_munmap+0x1f1/0x2b0 [ 61.649650] mmap_region+0x1f9/0x2660 [ 61.650130] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.650634] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.651337] ? __pfx_lock_acquire+0x10/0x10 [ 61.651860] ? __pfx_mmap_region+0x10/0x10 [ 61.652381] ? security_mmap_addr+0x7d/0xa0 [ 61.652891] ? get_unmapped_area+0x1f5/0x3f0 [ 61.653424] do_mmap+0x854/0xf00 [ 61.653854] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.654330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.654875] ksys_mmap_pgoff+0x3af/0x500 [ 61.655367] do_syscall_64+0x3f/0x90 [ 61.655842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.656464] RIP: 0033:0x7ff3b5af2d82 [ 61.656909] 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 [ 61.658992] RSP: 002b:00007ffe61b80f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.659877] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3b5af2d82 [ 61.660704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3b4f2c000 [ 61.661530] RBP: 00007ff3b4f2c000 R08: 0000000000000009 R09: 0000000000001000 [ 61.662348] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d42b733f70 [ 61.663170] R13: 00007ffe61b80fb0 R14: 00007ffe61b80fe0 R15: 00007ffe61b81340 [ 61.664024] [ 61.664315] [ 61.664523] Allocated by task 212: [ 61.664943] kasan_save_stack+0x22/0x50 [ 61.665432] kasan_set_track+0x25/0x30 [ 61.665936] __kasan_slab_alloc+0x59/0x70 [ 61.666456] kmem_cache_alloc+0x16b/0x370 [ 61.666952] vm_area_dup+0x20/0x160 [ 61.667391] __split_vma+0x170/0x950 [ 61.667852] split_vma+0xc6/0x110 [ 61.668286] mprotect_fixup+0x8d2/0xb30 [ 61.668772] do_mprotect_pkey+0x87e/0xd40 [ 61.669284] __x64_sys_mprotect+0x78/0xc0 [ 61.669793] do_syscall_64+0x3f/0x90 [ 61.670249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.670895] [ 61.671140] Freed by task 212: [ 61.671591] kasan_save_stack+0x22/0x50 [ 61.672196] kasan_set_track+0x25/0x30 [ 61.672763] kasan_save_free_info+0x2b/0x50 [ 61.673374] __kasan_slab_free+0x10a/0x190 [ 61.673989] kmem_cache_free+0x10d/0x4d0 [ 61.674576] rcu_core+0x8c8/0x2860 [ 61.675074] __do_softirq+0x1b7/0x7d4 [ 61.675613] [ 61.675867] Last potentially related work creation: [ 61.676537] kasan_save_stack+0x22/0x50 [ 61.677109] __kasan_record_aux_stack+0x8e/0xa0 [ 61.677772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.678493] remove_vma+0x139/0x170 [ 61.679005] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.679650] do_vmi_munmap+0x1f1/0x2b0 [ 61.680239] __vm_munmap+0x138/0x3a0 [ 61.680788] __x64_sys_munmap+0x59/0x80 [ 61.681352] do_syscall_64+0x3f/0x90 [ 61.681900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.682640] [ 61.682882] The buggy address belongs to the object at ffff88801a047828 [ 61.682882] which belongs to the cache vm_area_struct of size 168 [ 61.684599] The buggy address is located 88 bytes inside of [ 61.684599] freed 168-byte region [ffff88801a047828, ffff88801a0478d0) [ 61.686221] [ 61.686473] The buggy address belongs to the physical page: [ 61.687228] page:00000000c12a776d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a047 [ 61.688507] memcg:ffff88801a042101 [ 61.688996] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.689745] page_type: 0xffffffff() [ 61.690269] raw: 0100000000000200 ffff88800879fc80 ffffea0000680c80 dead000000000006 [ 61.691334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a042101 [ 61.692413] page dumped because: kasan: bad access detected [ 61.693184] [ 61.693440] Memory state around the buggy address: [ 61.694110] ffff88801a047780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.695091] ffff88801a047800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.696080] >ffff88801a047880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.697048] ^ [ 61.697522] ffff88801a047900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.698500] ffff88801a047980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.699480] ================================================================== [ 61.700623] Disabling lock debugging due to kernel taint [ 64.269497] BUG: Bad rss-counter state mm:000000000ffdda15 type:MM_FILEPAGES val:33 [ 64.270695] BUG: Bad rss-counter state mm:000000000ffdda15 type:MM_ANONPAGES val:22 [ 64.749242] BUG: Bad rss-counter state mm:000000008e09dec8 type:MM_FILEPAGES val:33 [ 64.750410] BUG: Bad rss-counter state mm:000000008e09dec8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20098' (ECDSA) to the list of known hosts. 2023/06/19 20:10:42 fuzzer started 2023/06/19 20:10:42 dialing manager at localhost:44161 2023/06/19 20:10:42 checking machine... 2023/06/19 20:10:42 checking revisions... [ 65.491555] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:10:42 testing simple program... [ 65.532295] cgroup: Unknown subsys name 'net' [ 65.591678] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:10:41 Registers: info registers vcpu 0 RAX=0000000080010002 RBX=003b9aca00000000 RCX=ffffffff813c803e RDX=ffffffff8542a6c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88806ce09db8 RSP=ffff88806ce09cf0 R8 =0000000000000006 R9 =0010de3dccb96e1c R10=003b9aca00000000 R11=ffff88806ce09ff8 R12=00000000005549f8 R13=0010de3dccb96e1c R14=0000000000280ce4 R15=00000f423ffff834 RIP=ffffffff814c07e0 RFL=00000083 [--S---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 0000000000000000 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=00007f0b5dc8ccc0 CR3=000000000e738000 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=57eb1359e9361ca9c04b0c57fc11e004 XMM02=000000000011c448eff9b2d0a8fce9cb XMM03=000000000011c5182c67c8bc2e329bc3 XMM04=feb70130dcb57dd600000000000ae988 XMM05=f75a46d529765ec20000000000134500 XMM06=806171799158d96700000000001332f0 XMM07=fb795ef6d65770560000000000123920 XMM08=2c67c8bc2e329bc3000000000011c4b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880101e8000 RBX=ffff8880101e7f58 RCX=0000000000000001 RDX=ffff8880101e7f60 RSI=ffff8880101e7f48 RDI=ffff8880101e75b0 RBP=ffff8880101e0000 RSP=ffff8880101e7530 R8 =0000000000000001 R9 =ffff8880101e75e0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880101e7600 R13=ffff8880101e75e8 R14=ffff8880101e7f48 R15=ffff8880101e75a0 RIP=ffffffff81131296 RFL=00000287 [--S--PC] 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 00007fd57ccee900 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=00007ffd12a6c000 CR3=000000000f466000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000