syzkaller login: [ 92.674837] BUG: Bad rss-counter state mm:00000000c5668f6c type:MM_FILEPAGES val:33 [ 92.676524] BUG: Bad rss-counter state mm:00000000c5668f6c type:MM_ANONPAGES val:22 [ 92.841563] ================================================================== [ 92.842507] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 92.843518] Read of size 8 at addr ffff8880199036b0 by task sshd/227 [ 92.844390] [ 92.844639] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 92.845728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 92.846774] Call Trace: [ 92.847113] [ 92.847428] dump_stack_lvl+0x91/0xf0 [ 92.847954] print_report+0xcc/0x620 [ 92.848472] ? __virt_addr_valid+0x102/0x340 [ 92.849083] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.849740] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.850397] kasan_report+0xbe/0xf0 [ 92.850905] ? vma_interval_tree_remove+0xc75/0xec0 [ 92.851559] vma_interval_tree_remove+0xc75/0xec0 [ 92.852205] vma_prepare+0xc54/0x11a0 [ 92.852721] __split_vma+0x5af/0x950 [ 92.853215] ? __pfx___split_vma+0x10/0x10 [ 92.853775] ? find_held_lock+0x2c/0x110 [ 92.854328] do_vmi_align_munmap+0x2ba/0x11f0 [ 92.854926] ? lock_is_held_type+0x9f/0x120 [ 92.855507] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 92.856146] ? mtree_range_walk+0x632/0x900 [ 92.856729] ? mas_walk+0x5c7/0x7c0 [ 92.857222] do_vmi_munmap+0x1f1/0x2b0 [ 92.857738] mmap_region+0x1f9/0x2660 [ 92.858237] ? vm_mmap_pgoff+0x15c/0x3a0 [ 92.858765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 92.859515] ? __pfx_lock_acquire+0x10/0x10 [ 92.860085] ? __pfx_mmap_region+0x10/0x10 [ 92.860648] ? security_mmap_addr+0x7d/0xa0 [ 92.861196] ? get_unmapped_area+0x1f5/0x3f0 [ 92.861764] do_mmap+0x854/0xf00 [ 92.862231] vm_mmap_pgoff+0x1a6/0x3a0 [ 92.862752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 92.863357] ksys_mmap_pgoff+0x3af/0x500 [ 92.863887] do_syscall_64+0x3f/0x90 [ 92.864385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.865045] RIP: 0033:0x7fef35af6d82 [ 92.865519] 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 [ 92.867737] RSP: 002b:00007ffcba919a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 92.868670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef35af6d82 [ 92.869545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef34f30000 [ 92.870419] RBP: 00007fef34f30000 R08: 0000000000000009 R09: 0000000000001000 [ 92.871306] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627bc4acf70 [ 92.872183] R13: 00007ffcba919a40 R14: 00007ffcba919a70 R15: 00007ffcba919dd0 [ 92.873081] [ 92.873383] [ 92.873602] Allocated by task 220: [ 92.874046] kasan_save_stack+0x22/0x50 [ 92.874594] kasan_set_track+0x25/0x30 [ 92.875166] __kasan_slab_alloc+0x59/0x70 [ 92.875781] kmem_cache_alloc+0x16b/0x370 [ 92.876380] vm_area_dup+0x20/0x160 [ 92.876907] __split_vma+0x170/0x950 [ 92.877449] split_vma+0xc6/0x110 [ 92.877955] mprotect_fixup+0x8d2/0xb30 [ 92.878535] do_mprotect_pkey+0x87e/0xd40 [ 92.879138] __x64_sys_mprotect+0x78/0xc0 [ 92.879756] do_syscall_64+0x3f/0x90 [ 92.880301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.881047] [ 92.881294] Freed by task 220: [ 92.881749] kasan_save_stack+0x22/0x50 [ 92.882358] kasan_set_track+0x25/0x30 [ 92.882932] kasan_save_free_info+0x2b/0x50 [ 92.883569] __kasan_slab_free+0x10a/0x190 [ 92.884187] kmem_cache_free+0x10d/0x4d0 [ 92.884782] rcu_core+0x8c8/0x2860 [ 92.885291] __do_softirq+0x1b7/0x7d4 [ 92.885844] [ 92.886088] Last potentially related work creation: [ 92.886754] kasan_save_stack+0x22/0x50 [ 92.887345] __kasan_record_aux_stack+0x8e/0xa0 [ 92.887998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 92.888740] remove_vma+0x139/0x170 [ 92.889256] do_vmi_align_munmap+0xd4a/0x11f0 [ 92.889899] do_vmi_munmap+0x1f1/0x2b0 [ 92.890452] __vm_munmap+0x138/0x3a0 [ 92.890993] __x64_sys_munmap+0x59/0x80 [ 92.891572] do_syscall_64+0x3f/0x90 [ 92.892119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 92.892871] [ 92.893116] The buggy address belongs to the object at ffff888019903658 [ 92.893116] which belongs to the cache vm_area_struct of size 168 [ 92.894793] The buggy address is located 88 bytes inside of [ 92.894793] freed 168-byte region [ffff888019903658, ffff888019903700) [ 92.896422] [ 92.896667] The buggy address belongs to the physical page: [ 92.897427] page:0000000029241923 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19903 [ 92.898671] memcg:ffff88800cc17c01 [ 92.899160] flags: 0x100000000000200(slab|node=0|zone=1) [ 92.899892] page_type: 0xffffffff() [ 92.900402] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 92.901440] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc17c01 [ 92.902467] page dumped because: kasan: bad access detected [ 92.903226] [ 92.903489] Memory state around the buggy address: [ 92.904154] ffff888019903580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 92.905124] ffff888019903600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 92.906090] >ffff888019903680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.907047] ^ [ 92.907720] ffff888019903700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 92.908691] ffff888019903780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 92.909654] ================================================================== [ 92.910760] Disabling lock debugging due to kernel taint [ 94.852797] BUG: Bad rss-counter state mm:0000000072974098 type:MM_FILEPAGES val:33 [ 94.853977] BUG: Bad rss-counter state mm:0000000072974098 type:MM_ANONPAGES val:22 [ 95.325617] BUG: Bad rss-counter state mm:000000002862192a type:MM_FILEPAGES val:33 [ 95.326616] BUG: Bad rss-counter state mm:000000002862192a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5832' (ECDSA) to the list of known hosts. 2023/06/20 08:14:11 fuzzer started 2023/06/20 08:14:11 dialing manager at localhost:44161 2023/06/20 08:14:11 checking machine... 2023/06/20 08:14:11 checking revisions... [ 96.074372] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:14:12 testing simple program... [ 96.136276] cgroup: Unknown subsys name 'net' [ 96.184863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:13:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000001c0 RCX=0000000000000000 RDX=ffff888019110000 RSI=ffffffff816f2400 RDI=0000000000000005 RBP=00007fb91c032000 RSP=ffff88800fd2fa10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000000000005a R13=00007fb91c031e40 R14=0000000000000000 R15=1ffff11001fa5f44 RIP=ffffffff814c07e0 RFL=00040206 [-----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 00007fb929966700 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=00007fffbda24000 CR3=000000000d80c000 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=2031313a34313a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a34313a3830203032 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=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=00007f6f63a9e5c0 CR3=0000000008db8000 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=306e6fa5aad0e3a9e349aff927517e86 XMM02=0000000000122350eff9b2d0a8fce9cb XMM03=00000000001224202c67c8bc2e329bc3 XMM04=f80501f44065a65e00000000000ae988 XMM05=16bbfc4fa606b6250000000000138cd8 XMM06=e8008b1642ea3e600000000000138b60 XMM07=e042d86d42eb936e0000000000129040 XMM08=795b1ee6658280390000000000122420 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000