syzkaller login: [ 30.578011] BUG: Bad rss-counter state mm:00000000e8585223 type:MM_FILEPAGES val:33 [ 30.579403] BUG: Bad rss-counter state mm:00000000e8585223 type:MM_ANONPAGES val:22 [ 30.744476] ================================================================== [ 30.745483] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.746472] Read of size 8 at addr ffff8880184b1798 by task sshd/220 [ 30.747518] [ 30.747755] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.748664] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.749706] Call Trace: [ 30.750045] [ 30.750348] dump_stack_lvl+0x91/0xf0 [ 30.750895] print_report+0xcc/0x620 [ 30.751412] ? __virt_addr_valid+0x102/0x340 [ 30.751996] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752659] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753308] kasan_report+0xbe/0xf0 [ 30.753819] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754477] vma_interval_tree_remove+0xc75/0xec0 [ 30.755133] vma_prepare+0xc54/0x11a0 [ 30.755646] __split_vma+0x5af/0x950 [ 30.756152] ? __pfx___split_vma+0x10/0x10 [ 30.756721] ? find_held_lock+0x2c/0x110 [ 30.757282] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.757889] ? lock_is_held_type+0x9f/0x120 [ 30.758473] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.759141] ? mtree_range_walk+0x632/0x900 [ 30.759742] ? mas_walk+0x5c7/0x7c0 [ 30.760264] do_vmi_munmap+0x1f1/0x2b0 [ 30.760800] mmap_region+0x1f9/0x2660 [ 30.761324] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.761871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.762667] ? __pfx_lock_acquire+0x10/0x10 [ 30.763244] ? __pfx_mmap_region+0x10/0x10 [ 30.763821] ? security_mmap_addr+0x7d/0xa0 [ 30.764381] ? get_unmapped_area+0x1f5/0x3f0 [ 30.764968] do_mmap+0x854/0xf00 [ 30.765448] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.765977] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.766588] ksys_mmap_pgoff+0x3af/0x500 [ 30.767132] do_syscall_64+0x3f/0x90 [ 30.767647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.768345] RIP: 0033:0x7f56f14b7d82 [ 30.768931] 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 [ 30.771259] RSP: 002b:00007ffe1b58a638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.772227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56f14b7d82 [ 30.773135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56f08f1000 [ 30.774037] RBP: 00007f56f08f1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.774947] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f86c727f70 [ 30.775860] R13: 00007ffe1b58a650 R14: 00007ffe1b58a680 R15: 00007ffe1b58a9e0 [ 30.776784] [ 30.777096] [ 30.777325] Allocated by task 213: [ 30.777792] kasan_save_stack+0x22/0x50 [ 30.778335] kasan_set_track+0x25/0x30 [ 30.778881] __kasan_slab_alloc+0x59/0x70 [ 30.779446] kmem_cache_alloc+0x16b/0x370 [ 30.780000] vm_area_dup+0x20/0x160 [ 30.780488] __split_vma+0x170/0x950 [ 30.780989] split_vma+0xc6/0x110 [ 30.781454] mprotect_fixup+0x8d2/0xb30 [ 30.781989] do_mprotect_pkey+0x87e/0xd40 [ 30.782568] __x64_sys_mprotect+0x78/0xc0 [ 30.783134] do_syscall_64+0x3f/0x90 [ 30.783644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784339] [ 30.784565] Freed by task 213: [ 30.784984] kasan_save_stack+0x22/0x50 [ 30.785524] kasan_set_track+0x25/0x30 [ 30.786060] kasan_save_free_info+0x2b/0x50 [ 30.786635] __kasan_slab_free+0x10a/0x190 [ 30.787197] kmem_cache_free+0x10d/0x4d0 [ 30.787739] rcu_core+0x8c8/0x2860 [ 30.788216] __do_softirq+0x1b7/0x7d4 [ 30.788816] [ 30.789047] Last potentially related work creation: [ 30.789667] kasan_save_stack+0x22/0x50 [ 30.790210] __kasan_record_aux_stack+0x8e/0xa0 [ 30.790845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.791538] remove_vma+0x139/0x170 [ 30.792031] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.792629] do_vmi_munmap+0x1f1/0x2b0 [ 30.793143] __vm_munmap+0x138/0x3a0 [ 30.793643] __x64_sys_munmap+0x59/0x80 [ 30.794171] do_syscall_64+0x3f/0x90 [ 30.794682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795371] [ 30.795598] The buggy address belongs to the object at ffff8880184b1740 [ 30.795598] which belongs to the cache vm_area_struct of size 168 [ 30.797157] The buggy address is located 88 bytes inside of [ 30.797157] freed 168-byte region [ffff8880184b1740, ffff8880184b17e8) [ 30.798655] [ 30.798886] The buggy address belongs to the physical page: [ 30.799596] page:000000002ab615ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x184b1 [ 30.800758] memcg:ffff888008ed3701 [ 30.801223] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.801909] page_type: 0xffffffff() [ 30.802394] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.803408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008ed3701 [ 30.804390] page dumped because: kasan: bad access detected [ 30.805100] [ 30.805338] Memory state around the buggy address: [ 30.805963] ffff8880184b1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.806881] ffff8880184b1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.807806] >ffff8880184b1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.808731] ^ [ 30.809265] ffff8880184b1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.810182] ffff8880184b1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.811113] ================================================================== [ 30.812143] Disabling lock debugging due to kernel taint [ 33.007684] BUG: Bad rss-counter state mm:0000000099b3b2ac type:MM_FILEPAGES val:33 [ 33.009022] BUG: Bad rss-counter state mm:0000000099b3b2ac type:MM_ANONPAGES val:22 [ 33.523287] BUG: Bad rss-counter state mm:00000000fd8e56e1 type:MM_FILEPAGES val:33 [ 33.524690] BUG: Bad rss-counter state mm:00000000fd8e56e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60068' (ECDSA) to the list of known hosts. 2023/06/21 05:58:39 fuzzer started 2023/06/21 05:58:40 dialing manager at localhost:36067 2023/06/21 05:58:40 checking machine... 2023/06/21 05:58:40 checking revisions... [ 34.208656] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:58:40 testing simple program... [ 34.269378] cgroup: Unknown subsys name 'net' [ 34.316934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:58:39 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffea00005d3c00 RCX=ffffffff8196df04 RDX=ffff888014620000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019300828 RSP=ffff88801461f9f0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=0000000000000000 R13=0000000000000000 R14=0000000000001000 R15=0000000000408c40 RIP=ffffffff814c0261 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f924cdd3900 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=00007f924c2f1000 CR3=000000000eea6000 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=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2d85bf41ccb859f300000000000ae988 XMM05=7bfe07d702d305ba0000000000132c78 XMM06=00603b655ade40b50000000000131d20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff8880146bd1c0 RSI=ffffffff8139349d RDI=0000000000000000 RBP=ffff88800e2bc000 RSP=ffff88806cf09df8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800e2bc4d8 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800e2bc6c0 RIP=ffffffff813934b0 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 00007fd046b57900 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=00007ffe45963000 CR3=000000000ef4a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000