syzkaller login: [ 29.497942] BUG: Bad rss-counter state mm:000000007c29b876 type:MM_FILEPAGES val:33 [ 29.498556] BUG: Bad rss-counter state mm:000000007c29b876 type:MM_ANONPAGES val:22 [ 29.605945] ================================================================== [ 29.606496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.607101] Read of size 8 at addr ffff888019b6ea50 by task sshd/221 [ 29.607575] [ 29.607726] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.608262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.608866] Call Trace: [ 29.609062] [ 29.609237] dump_stack_lvl+0x91/0xf0 [ 29.609544] print_report+0xcc/0x620 [ 29.609841] ? __virt_addr_valid+0x102/0x340 [ 29.610179] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.610558] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.610932] kasan_report+0xbe/0xf0 [ 29.611319] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.611709] vma_interval_tree_remove+0xc75/0xec0 [ 29.612079] vma_prepare+0xc54/0x11a0 [ 29.612378] __split_vma+0x5af/0x950 [ 29.612666] ? __pfx___split_vma+0x10/0x10 [ 29.612990] ? find_held_lock+0x2c/0x110 [ 29.613315] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.613659] ? lock_is_held_type+0x9f/0x120 [ 29.613991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.614365] ? mtree_range_walk+0x632/0x900 [ 29.614700] ? mas_walk+0x5c7/0x7c0 [ 29.614987] do_vmi_munmap+0x1f1/0x2b0 [ 29.615296] mmap_region+0x1f9/0x2660 [ 29.615588] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.615906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.616351] ? __pfx_lock_acquire+0x10/0x10 [ 29.616683] ? __pfx_mmap_region+0x10/0x10 [ 29.617014] ? security_mmap_addr+0x7d/0xa0 [ 29.617350] ? get_unmapped_area+0x1f5/0x3f0 [ 29.617688] do_mmap+0x854/0xf00 [ 29.617957] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.618266] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.618614] ksys_mmap_pgoff+0x3af/0x500 [ 29.618930] do_syscall_64+0x3f/0x90 [ 29.619221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.619626] RIP: 0033:0x7ff3b1d0fd82 [ 29.619932] 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 [ 29.621274] RSP: 002b:00007ffd941fc598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.621840] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3b1d0fd82 [ 29.622367] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3b1149000 [ 29.622895] RBP: 00007ff3b1149000 R08: 0000000000000009 R09: 0000000000001000 [ 29.623425] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632b93ffec0 [ 29.623961] R13: 00007ffd941fc5b0 R14: 00007ffd941fc5e0 R15: 00007ffd941fc940 [ 29.624499] [ 29.624684] [ 29.624816] Allocated by task 214: [ 29.625090] kasan_save_stack+0x22/0x50 [ 29.625403] kasan_set_track+0x25/0x30 [ 29.625707] __kasan_slab_alloc+0x59/0x70 [ 29.626033] kmem_cache_alloc+0x16b/0x370 [ 29.626354] vm_area_dup+0x20/0x160 [ 29.626634] __split_vma+0x170/0x950 [ 29.626924] split_vma+0xc6/0x110 [ 29.627194] mprotect_fixup+0x8d2/0xb30 [ 29.627506] do_mprotect_pkey+0x87e/0xd40 [ 29.627835] __x64_sys_mprotect+0x78/0xc0 [ 29.628154] do_syscall_64+0x3f/0x90 [ 29.628450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.628847] [ 29.628980] Freed by task 13: [ 29.629218] kasan_save_stack+0x22/0x50 [ 29.629527] kasan_set_track+0x25/0x30 [ 29.629833] kasan_save_free_info+0x2b/0x50 [ 29.630164] __kasan_slab_free+0x10a/0x190 [ 29.630499] kmem_cache_free+0x10d/0x4d0 [ 29.630812] rcu_core+0x8c8/0x2860 [ 29.631085] __do_softirq+0x1b7/0x7d4 [ 29.631380] [ 29.631517] Last potentially related work creation: [ 29.631902] kasan_save_stack+0x22/0x50 [ 29.632216] __kasan_record_aux_stack+0x8e/0xa0 [ 29.632571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.632978] remove_vma+0x139/0x170 [ 29.633258] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.633604] do_vmi_munmap+0x1f1/0x2b0 [ 29.633903] __vm_munmap+0x138/0x3a0 [ 29.634191] __x64_sys_munmap+0x59/0x80 [ 29.634498] do_syscall_64+0x3f/0x90 [ 29.634794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.635188] [ 29.635324] The buggy address belongs to the object at ffff888019b6e9f8 [ 29.635324] which belongs to the cache vm_area_struct of size 168 [ 29.636246] The buggy address is located 88 bytes inside of [ 29.636246] freed 168-byte region [ffff888019b6e9f8, ffff888019b6eaa0) [ 29.637132] [ 29.637265] The buggy address belongs to the physical page: [ 29.637677] page:00000000555575b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b6e [ 29.638367] memcg:ffff888016846d01 [ 29.638630] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.639073] page_type: 0xffffffff() [ 29.639351] raw: 0100000000000200 ffff88800879fc80 ffffea00003aed80 dead000000000003 [ 29.639931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016846d01 [ 29.640498] page dumped because: kasan: bad access detected [ 29.640916] [ 29.641050] Memory state around the buggy address: [ 29.641409] ffff888019b6e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.641942] ffff888019b6e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.642477] >ffff888019b6ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.643006] ^ [ 29.643439] ffff888019b6ea80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 29.643988] ffff888019b6eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.644516] ================================================================== [ 29.645111] Disabling lock debugging due to kernel taint [ 32.009482] BUG: Bad rss-counter state mm:000000008d41fb38 type:MM_FILEPAGES val:33 [ 32.010491] BUG: Bad rss-counter state mm:000000008d41fb38 type:MM_ANONPAGES val:22 [ 32.549219] BUG: Bad rss-counter state mm:000000001a8c4b44 type:MM_FILEPAGES val:33 [ 32.550471] BUG: Bad rss-counter state mm:000000001a8c4b44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52151' (ECDSA) to the list of known hosts. 2023/06/20 10:37:02 fuzzer started 2023/06/20 10:37:02 dialing manager at localhost:44161 2023/06/20 10:37:02 checking machine... 2023/06/20 10:37:02 checking revisions... [ 33.161366] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:37:02 testing simple program... [ 33.212788] cgroup: Unknown subsys name 'net' [ 33.263499] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:37:01 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100333eece RSI=ffffffff81741198 RDI=ffff8880199f7670 RBP=ffff8880199f7708 RSP=ffff8880199f7648 R8 =0000000000000001 R9 =ffff8880199f76b0 R10=0000000000038001 R11=000000000001e456 R12=ffff8880199f7738 R13=0000000000000000 R14=ffff8880158351c0 R15=ffff8880199f7670 RIP=ffffffff811305f0 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 00007f3dff650900 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=00007f3dff62f020 CR3=000000001896a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fd0243f30e0 CR3=000000000e64c000 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=2031303a37333a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a37333a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000