syzkaller login: [ 38.693381] BUG: Bad rss-counter state mm:00000000b2c6dbe3 type:MM_FILEPAGES val:33 [ 38.694763] BUG: Bad rss-counter state mm:00000000b2c6dbe3 type:MM_ANONPAGES val:22 [ 38.733328] ================================================================== [ 38.734142] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.734887] Read of size 8 at addr ffff88800cad3d08 by task sshd/219 [ 38.735491] [ 38.735667] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.736352] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.737122] Call Trace: [ 38.737373] [ 38.737709] dump_stack_lvl+0x91/0xf0 [ 38.738107] print_report+0xcc/0x620 [ 38.738490] ? __virt_addr_valid+0x102/0x340 [ 38.738924] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.739407] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.739904] kasan_report+0xbe/0xf0 [ 38.740277] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.740763] vma_interval_tree_remove+0xc75/0xec0 [ 38.741241] vma_prepare+0xc54/0x11a0 [ 38.741619] __split_vma+0x5af/0x950 [ 38.742006] ? __pfx___split_vma+0x10/0x10 [ 38.742420] ? find_held_lock+0x2c/0x110 [ 38.742836] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.743281] ? lock_is_held_type+0x9f/0x120 [ 38.743711] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.744191] ? mtree_range_walk+0x632/0x900 [ 38.744632] ? mas_walk+0x5c7/0x7c0 [ 38.744996] do_vmi_munmap+0x1f1/0x2b0 [ 38.745389] mmap_region+0x1f9/0x2660 [ 38.745771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.746193] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.746763] ? __pfx_lock_acquire+0x10/0x10 [ 38.747188] ? __pfx_mmap_region+0x10/0x10 [ 38.747607] ? security_mmap_addr+0x7d/0xa0 [ 38.748034] ? get_unmapped_area+0x1f5/0x3f0 [ 38.748467] do_mmap+0x854/0xf00 [ 38.748815] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.749210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.749658] ksys_mmap_pgoff+0x3af/0x500 [ 38.750068] do_syscall_64+0x3f/0x90 [ 38.750449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.750966] RIP: 0033:0x7fc691297d82 [ 38.751328] 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 [ 38.753009] RSP: 002b:00007ffceb7aa0a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.753726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc691297d82 [ 38.754420] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6906d1000 [ 38.755102] RBP: 00007fc6906d1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.755775] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555860f60b20 [ 38.756448] R13: 00007ffceb7aa0c0 R14: 00007ffceb7aa0f0 R15: 00007ffceb7aa450 [ 38.757129] [ 38.757358] [ 38.757528] Allocated by task 212: [ 38.757879] kasan_save_stack+0x22/0x50 [ 38.758284] kasan_set_track+0x25/0x30 [ 38.758682] __kasan_slab_alloc+0x59/0x70 [ 38.759095] kmem_cache_alloc+0x16b/0x370 [ 38.759502] vm_area_dup+0x20/0x160 [ 38.759862] __split_vma+0x170/0x950 [ 38.760229] split_vma+0xc6/0x110 [ 38.760579] mprotect_fixup+0x8d2/0xb30 [ 38.760978] do_mprotect_pkey+0x87e/0xd40 [ 38.761390] __x64_sys_mprotect+0x78/0xc0 [ 38.761805] do_syscall_64+0x3f/0x90 [ 38.762191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.762699] [ 38.762870] Freed by task 212: [ 38.763183] kasan_save_stack+0x22/0x50 [ 38.763581] kasan_set_track+0x25/0x30 [ 38.763974] kasan_save_free_info+0x2b/0x50 [ 38.764396] __kasan_slab_free+0x10a/0x190 [ 38.764821] kmem_cache_free+0x10d/0x4d0 [ 38.765222] rcu_core+0x8c8/0x2860 [ 38.765581] __do_softirq+0x1b7/0x7d4 [ 38.765976] [ 38.766147] Last potentially related work creation: [ 38.766577] kasan_save_stack+0x22/0x50 [ 38.766964] __kasan_record_aux_stack+0x8e/0xa0 [ 38.767386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.767870] remove_vma+0x139/0x170 [ 38.768213] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.768630] do_vmi_munmap+0x1f1/0x2b0 [ 38.768989] __vm_munmap+0x138/0x3a0 [ 38.769336] __x64_sys_munmap+0x59/0x80 [ 38.769704] do_syscall_64+0x3f/0x90 [ 38.770067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.770543] [ 38.770704] Second to last potentially related work creation: [ 38.771205] kasan_save_stack+0x22/0x50 [ 38.771580] __kasan_record_aux_stack+0x8e/0xa0 [ 38.772007] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.772487] remove_vma+0x139/0x170 [ 38.772822] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.773229] do_vmi_munmap+0x1f1/0x2b0 [ 38.773585] mmap_region+0x1f9/0x2660 [ 38.773954] do_mmap+0x854/0xf00 [ 38.774271] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.774628] ksys_mmap_pgoff+0x3af/0x500 [ 38.775002] do_syscall_64+0x3f/0x90 [ 38.775352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.775819] [ 38.775978] The buggy address belongs to the object at ffff88800cad3cb0 [ 38.775978] which belongs to the cache vm_area_struct of size 168 [ 38.777046] The buggy address is located 88 bytes inside of [ 38.777046] freed 168-byte region [ffff88800cad3cb0, ffff88800cad3d58) [ 38.778071] [ 38.778232] The buggy address belongs to the physical page: [ 38.778727] page:00000000b5717c77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcad3 [ 38.779538] memcg:ffff888013ff9601 [ 38.779855] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.780363] page_type: 0xffffffff() [ 38.780695] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c0340 dead000000000005 [ 38.781373] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ff9601 [ 38.782042] page dumped because: kasan: bad access detected [ 38.782523] [ 38.782681] Memory state around the buggy address: [ 38.783102] ffff88800cad3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.783725] ffff88800cad3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.784350] >ffff88800cad3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.784975] ^ [ 38.785301] ffff88800cad3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.785931] ffff88800cad3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.786549] ================================================================== [ 38.787375] Disabling lock debugging due to kernel taint [ 40.798777] BUG: Bad rss-counter state mm:00000000be3f6d98 type:MM_FILEPAGES val:33 [ 40.799756] BUG: Bad rss-counter state mm:00000000be3f6d98 type:MM_ANONPAGES val:22 [ 41.251562] BUG: Bad rss-counter state mm:00000000d5648e7d type:MM_FILEPAGES val:33 [ 41.252722] BUG: Bad rss-counter state mm:00000000d5648e7d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12928' (ECDSA) to the list of known hosts. 2023/06/20 17:09:04 fuzzer started 2023/06/20 17:09:04 dialing manager at localhost:36067 2023/06/20 17:09:04 checking machine... 2023/06/20 17:09:04 checking revisions... [ 41.973231] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:09:04 testing simple program... [ 42.040073] cgroup: Unknown subsys name 'net' [ 42.098200] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:09:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09cd0 R8 =0000000000000000 R9 =1ffffffff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88806ce361a0 R13=ffffffff81830805 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8180f094 RFL=00000086 [--S--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 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=000056046905ffe0 CR3=000000000e288000 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=2034303a39303a3731203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a39303a3731203032 XMM08=3d656e696c646d632022656369767265 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=00007f1811743cc0 CR3=000000000e288000 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=39303a3731203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000