syzkaller login: [ 34.274669] BUG: Bad rss-counter state mm:000000004600729c type:MM_FILEPAGES val:33 [ 34.275898] BUG: Bad rss-counter state mm:000000004600729c type:MM_ANONPAGES val:22 [ 34.314298] ================================================================== [ 34.315490] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.316669] Read of size 8 at addr ffff888016440880 by task sshd/220 [ 34.317631] [ 34.317901] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.318968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.320183] Call Trace: [ 34.320610] [ 34.320938] dump_stack_lvl+0x91/0xf0 [ 34.321538] print_report+0xcc/0x620 [ 34.322118] ? __virt_addr_valid+0x102/0x340 [ 34.322798] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.323565] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.324319] kasan_report+0xbe/0xf0 [ 34.324877] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.325603] vma_interval_tree_remove+0xc75/0xec0 [ 34.326409] vma_prepare+0xc54/0x11a0 [ 34.326917] __split_vma+0x5af/0x950 [ 34.327433] ? __pfx___split_vma+0x10/0x10 [ 34.328014] ? find_held_lock+0x2c/0x110 [ 34.328604] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.329391] ? lock_is_held_type+0x9f/0x120 [ 34.329962] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.330774] ? mtree_range_walk+0x632/0x900 [ 34.331558] ? mas_walk+0x5c7/0x7c0 [ 34.332091] do_vmi_munmap+0x1f1/0x2b0 [ 34.332645] mmap_region+0x1f9/0x2660 [ 34.333234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.333806] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.334731] ? __pfx_lock_acquire+0x10/0x10 [ 34.335434] ? __pfx_mmap_region+0x10/0x10 [ 34.335998] ? security_mmap_addr+0x7d/0xa0 [ 34.336577] ? get_unmapped_area+0x1f5/0x3f0 [ 34.337176] do_mmap+0x854/0xf00 [ 34.337656] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.338190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.338804] ksys_mmap_pgoff+0x3af/0x500 [ 34.339373] do_syscall_64+0x3f/0x90 [ 34.339905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.340605] RIP: 0033:0x7f2960b0dd82 [ 34.341100] 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 [ 34.343386] RSP: 002b:00007ffd6e2a3e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.344368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2960b0dd82 [ 34.345274] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f295ff47000 [ 34.346178] RBP: 00007f295ff47000 R08: 0000000000000009 R09: 0000000000001000 [ 34.347079] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddb4ae8ec0 [ 34.347993] R13: 00007ffd6e2a3e30 R14: 00007ffd6e2a3e60 R15: 00007ffd6e2a41c0 [ 34.348914] [ 34.349230] [ 34.349461] Allocated by task 213: [ 34.349922] kasan_save_stack+0x22/0x50 [ 34.350470] kasan_set_track+0x25/0x30 [ 34.350998] __kasan_slab_alloc+0x59/0x70 [ 34.351578] kmem_cache_alloc+0x16b/0x370 [ 34.352135] vm_area_dup+0x20/0x160 [ 34.352627] __split_vma+0x170/0x950 [ 34.353124] split_vma+0xc6/0x110 [ 34.353598] mprotect_fixup+0x8d2/0xb30 [ 34.354138] do_mprotect_pkey+0x87e/0xd40 [ 34.354701] __x64_sys_mprotect+0x78/0xc0 [ 34.355285] do_syscall_64+0x3f/0x90 [ 34.355792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.356480] [ 34.356714] Freed by task 213: [ 34.357137] kasan_save_stack+0x22/0x50 [ 34.357675] kasan_set_track+0x25/0x30 [ 34.358213] kasan_save_free_info+0x2b/0x50 [ 34.358787] __kasan_slab_free+0x10a/0x190 [ 34.359428] kmem_cache_free+0x10d/0x4d0 [ 34.359996] rcu_core+0x8c8/0x2860 [ 34.360470] __do_softirq+0x1b7/0x7d4 [ 34.360959] [ 34.361181] Last potentially related work creation: [ 34.361813] kasan_save_stack+0x22/0x50 [ 34.362363] __kasan_record_aux_stack+0x8e/0xa0 [ 34.362988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.363723] remove_vma+0x139/0x170 [ 34.364215] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.364820] do_vmi_munmap+0x1f1/0x2b0 [ 34.365346] __vm_munmap+0x138/0x3a0 [ 34.365852] __x64_sys_munmap+0x59/0x80 [ 34.366386] do_syscall_64+0x3f/0x90 [ 34.366897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.367599] [ 34.367834] The buggy address belongs to the object at ffff888016440828 [ 34.367834] which belongs to the cache vm_area_struct of size 168 [ 34.369470] The buggy address is located 88 bytes inside of [ 34.369470] freed 168-byte region [ffff888016440828, ffff8880164408d0) [ 34.370978] [ 34.371235] The buggy address belongs to the physical page: [ 34.371941] page:000000000e5a6f08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16440 [ 34.373113] memcg:ffff888019dc3901 [ 34.373573] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.374266] page_type: 0xffffffff() [ 34.374755] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.375754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dc3901 [ 34.376765] page dumped because: kasan: bad access detected [ 34.377471] [ 34.377700] Memory state around the buggy address: [ 34.378325] ffff888016440780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.379253] ffff888016440800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.380173] >ffff888016440880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.381110] ^ [ 34.381571] ffff888016440900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.382502] ffff888016440980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 34.383463] ================================================================== [ 34.384581] Disabling lock debugging due to kernel taint [ 36.266026] BUG: Bad rss-counter state mm:0000000085ebddd3 type:MM_FILEPAGES val:33 [ 36.267132] BUG: Bad rss-counter state mm:0000000085ebddd3 type:MM_ANONPAGES val:22 [ 36.648176] BUG: Bad rss-counter state mm:00000000ed4d153b type:MM_FILEPAGES val:33 [ 36.648934] BUG: Bad rss-counter state mm:00000000ed4d153b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16256' (ECDSA) to the list of known hosts. 2023/06/20 08:01:12 fuzzer started 2023/06/20 08:01:12 dialing manager at localhost:44161 2023/06/20 08:01:12 checking machine... 2023/06/20 08:01:12 checking revisions... [ 37.277994] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:01:12 testing simple program... [ 37.336661] cgroup: Unknown subsys name 'net' [ 37.394977] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:01:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801615f9a0 RCX=0000000000000001 RDX=1ffff11002c2bf34 RSI=ffffffff82198604 RDI=ffff88801615f9ac RBP=000000000000000c RSP=ffff88801615f8b8 R8 =0000000000000001 R9 =ffff88801615f918 R10=0000000000038001 R11=000000000001cf8f R12=ffff88801615f9a0 R13=0000000000000000 R14=ffff88801a0251c0 R15=0000000080080003 RIP=ffffffff813ad4d5 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 00007fa419c86900 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=00007fa419c3a01c CR3=000000000e8f8000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000008000 RCX=ffffffff81850abc RDX=ffff88801a0251c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016aa0c98 RSP=ffff88801615f920 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=0000000000000001 R12=0000000000000000 R13=ffff88800c84ea50 R14=0000000000000000 R15=1ffff11002c2bf33 RIP=ffffffff81850afd 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 00007fa419c86900 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=00007fa41a23e0b0 CR3=000000000e8f8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000