syzkaller login: [ 30.924391] BUG: Bad rss-counter state mm:00000000eb6bc290 type:MM_FILEPAGES val:33 [ 30.926088] BUG: Bad rss-counter state mm:00000000eb6bc290 type:MM_ANONPAGES val:22 [ 31.092651] ================================================================== [ 31.093509] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.094396] Read of size 8 at addr ffff888019c73c20 by task sshd/221 [ 31.095228] [ 31.095439] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.096249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.097175] Call Trace: [ 31.097477] [ 31.097747] dump_stack_lvl+0x91/0xf0 [ 31.098215] print_report+0xcc/0x620 [ 31.098679] ? __virt_addr_valid+0x102/0x340 [ 31.099230] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.099808] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.100395] kasan_report+0xbe/0xf0 [ 31.100845] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.101429] vma_interval_tree_remove+0xc75/0xec0 [ 31.102001] vma_prepare+0xc54/0x11a0 [ 31.102460] __split_vma+0x5af/0x950 [ 31.102909] ? __pfx___split_vma+0x10/0x10 [ 31.103448] ? find_held_lock+0x2c/0x110 [ 31.103973] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.104532] ? lock_is_held_type+0x9f/0x120 [ 31.105069] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.105668] ? mtree_range_walk+0x632/0x900 [ 31.106212] ? mas_walk+0x5c7/0x7c0 [ 31.106684] do_vmi_munmap+0x1f1/0x2b0 [ 31.107183] mmap_region+0x1f9/0x2660 [ 31.107657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.108156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.108872] ? __pfx_lock_acquire+0x10/0x10 [ 31.109397] ? __pfx_mmap_region+0x10/0x10 [ 31.109924] ? security_mmap_addr+0x7d/0xa0 [ 31.110462] ? get_unmapped_area+0x1f5/0x3f0 [ 31.111001] do_mmap+0x854/0xf00 [ 31.111451] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.111929] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.112489] ksys_mmap_pgoff+0x3af/0x500 [ 31.112994] do_syscall_64+0x3f/0x90 [ 31.113473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.114122] RIP: 0033:0x7f901c6cdd82 [ 31.114570] 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 [ 31.116689] RSP: 002b:00007fffafa4d9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.117568] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f901c6cdd82 [ 31.118409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f901bb07000 [ 31.119269] RBP: 00007f901bb07000 R08: 0000000000000009 R09: 0000000000001000 [ 31.120110] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a112cffec0 [ 31.120937] R13: 00007fffafa4d9e0 R14: 00007fffafa4da10 R15: 00007fffafa4dd70 [ 31.121769] [ 31.122057] [ 31.122269] Allocated by task 213: [ 31.122687] kasan_save_stack+0x22/0x50 [ 31.123186] kasan_set_track+0x25/0x30 [ 31.123668] __kasan_slab_alloc+0x59/0x70 [ 31.124194] kmem_cache_alloc+0x16b/0x370 [ 31.124698] vm_area_dup+0x20/0x160 [ 31.125151] __split_vma+0x170/0x950 [ 31.125607] split_vma+0xc6/0x110 [ 31.126048] mprotect_fixup+0x8d2/0xb30 [ 31.126544] do_mprotect_pkey+0x87e/0xd40 [ 31.127054] __x64_sys_mprotect+0x78/0xc0 [ 31.127585] do_syscall_64+0x3f/0x90 [ 31.128054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.128683] [ 31.128894] Freed by task 213: [ 31.129284] kasan_save_stack+0x22/0x50 [ 31.129786] kasan_set_track+0x25/0x30 [ 31.130268] kasan_save_free_info+0x2b/0x50 [ 31.130793] __kasan_slab_free+0x10a/0x190 [ 31.131332] kmem_cache_free+0x10d/0x4d0 [ 31.131837] rcu_core+0x8c8/0x2860 [ 31.132284] __do_softirq+0x1b7/0x7d4 [ 31.132747] [ 31.132961] Last potentially related work creation: [ 31.133532] kasan_save_stack+0x22/0x50 [ 31.134034] __kasan_record_aux_stack+0x8e/0xa0 [ 31.134605] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.135247] remove_vma+0x139/0x170 [ 31.135702] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.136255] do_vmi_munmap+0x1f1/0x2b0 [ 31.136735] __vm_munmap+0x138/0x3a0 [ 31.137193] __x64_sys_munmap+0x59/0x80 [ 31.137692] do_syscall_64+0x3f/0x90 [ 31.138165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138787] [ 31.139001] The buggy address belongs to the object at ffff888019c73bc8 [ 31.139001] which belongs to the cache vm_area_struct of size 168 [ 31.140473] The buggy address is located 88 bytes inside of [ 31.140473] freed 168-byte region [ffff888019c73bc8, ffff888019c73c70) [ 31.141861] [ 31.142077] The buggy address belongs to the physical page: [ 31.142732] page:000000004651aabc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c73 [ 31.143832] memcg:ffff8880147d0201 [ 31.144246] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.144915] page_type: 0xffffffff() [ 31.145355] raw: 0100000000000200 ffff8880087a0c80 ffffea000040bbc0 0000000000000003 [ 31.146243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147d0201 [ 31.147148] page dumped because: kasan: bad access detected [ 31.147799] [ 31.148011] Memory state around the buggy address: [ 31.148580] ffff888019c73b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.149410] ffff888019c73b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.150241] >ffff888019c73c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.151082] ^ [ 31.151613] ffff888019c73c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.152454] ffff888019c73d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.153290] ================================================================== [ 31.154395] Disabling lock debugging due to kernel taint [ 33.392016] BUG: Bad rss-counter state mm:00000000366c6837 type:MM_FILEPAGES val:33 [ 33.393010] BUG: Bad rss-counter state mm:00000000366c6837 type:MM_ANONPAGES val:22 [ 33.872741] BUG: Bad rss-counter state mm:0000000029ebdfb5 type:MM_FILEPAGES val:33 [ 33.873764] BUG: Bad rss-counter state mm:0000000029ebdfb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5671' (ECDSA) to the list of known hosts. 2023/06/21 04:05:27 fuzzer started 2023/06/21 04:05:27 dialing manager at localhost:36067 2023/06/21 04:05:27 checking machine... 2023/06/21 04:05:27 checking revisions... [ 34.381889] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:05:27 testing simple program... [ 34.419627] cgroup: Unknown subsys name 'net' [ 34.453660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:05:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=000000000000001e RDX=0000000000000001 RSI=0000000000000000 RDI=00005605b7534360 RBP=00005605b7534620 RSP=00007ffed9446728 R8 =00005605b7537220 R9 =0000000000000001 R10=0000000000000017 R11=00005605b7538400 R12=0000000000000000 R13=00005605b7534360 R14=0000000000000100 R15=0000000000000001 RIP=00007f3a574fa7c3 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3a56984900 00000000 00000000 GS =0000 0000000000000000 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=00007f3a55d9ec50 CR3=000000000d9a6000 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=7e8a42789393c4b7000000000011d7c0 XMM01=362d22166285e6bff441234c8d62fd7e XMM02=2c67c8bc2e329bc3000000000011da98 XMM03=fb795ef6d65770560000000000122160 XMM04=a8ed2644fa26c65900000000000ae988 XMM05=e4cb8bb95a7664b60000000000131fc8 XMM06=5eb121c52226c26f0000000000130e30 XMM07=e042d86d42eb936e00000000001223e0 XMM08=a1c5f0bb634f7e93000000000011daf8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfb69 RBX=ffffffff85dfdb48 RCX=ffffffff818088f6 RDX=0000000000000000 RSI=ffffffff8613873c RDI=ffffffff85dfdb3c RBP=ffffffff85dfdb48 RSP=ffff888016527978 R8 =ffffffff8613873c R9 =ffff888016527a70 R10=0000000000038001 R11=0000000000020c5e R12=ffffffff85dfdb4c R13=ffffffff85dfdb3c R14=ffffffff85dfdb44 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f3d32236900 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=00007ffd6404c000 CR3=0000000014566000 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