syzkaller login: [ 60.768790] BUG: Bad rss-counter state mm:0000000067ef58dd type:MM_FILEPAGES val:33 [ 60.769793] BUG: Bad rss-counter state mm:0000000067ef58dd type:MM_ANONPAGES val:22 [ 60.942354] ================================================================== [ 60.943296] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.944229] Read of size 8 at addr ffff88800ddaa310 by task sshd/218 [ 60.945094] [ 60.945312] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.946201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.947204] Call Trace: [ 60.947523] [ 60.947810] dump_stack_lvl+0x91/0xf0 [ 60.948300] print_report+0xcc/0x620 [ 60.948784] ? __virt_addr_valid+0x102/0x340 [ 60.949333] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.949960] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.950603] kasan_report+0xbe/0xf0 [ 60.951093] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.951705] vma_interval_tree_remove+0xc75/0xec0 [ 60.952308] vma_prepare+0xc54/0x11a0 [ 60.952789] __split_vma+0x5af/0x950 [ 60.953257] ? __pfx___split_vma+0x10/0x10 [ 60.953787] ? find_held_lock+0x2c/0x110 [ 60.954320] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.954899] ? lock_is_held_type+0x9f/0x120 [ 60.955440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.956074] ? mtree_range_walk+0x632/0x900 [ 60.956616] ? mas_walk+0x5c7/0x7c0 [ 60.957093] do_vmi_munmap+0x1f1/0x2b0 [ 60.957577] mmap_region+0x1f9/0x2660 [ 60.958055] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.958557] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.959274] ? __pfx_lock_acquire+0x10/0x10 [ 60.959807] ? __pfx_mmap_region+0x10/0x10 [ 60.960330] ? security_mmap_addr+0x7d/0xa0 [ 60.960856] ? get_unmapped_area+0x1f5/0x3f0 [ 60.961396] do_mmap+0x854/0xf00 [ 60.961829] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.962319] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.962920] ksys_mmap_pgoff+0x3af/0x500 [ 60.963444] do_syscall_64+0x3f/0x90 [ 60.963931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.964582] RIP: 0033:0x7ff8ce5e6d82 [ 60.965044] 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 [ 60.967234] RSP: 002b:00007fff911b89b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.968142] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8ce5e6d82 [ 60.968997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8cda20000 [ 60.969861] RBP: 00007ff8cda20000 R08: 0000000000000009 R09: 0000000000001000 [ 60.970731] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecf4719ec0 [ 60.971620] R13: 00007fff911b89d0 R14: 00007fff911b8a00 R15: 00007fff911b8d60 [ 60.972525] [ 60.972833] [ 60.973050] Allocated by task 211: [ 60.973482] kasan_save_stack+0x22/0x50 [ 60.973978] kasan_set_track+0x25/0x30 [ 60.974463] __kasan_slab_alloc+0x59/0x70 [ 60.975021] kmem_cache_alloc+0x16b/0x370 [ 60.975544] vm_area_dup+0x20/0x160 [ 60.976005] __split_vma+0x170/0x950 [ 60.976476] split_vma+0xc6/0x110 [ 60.976923] mprotect_fixup+0x8d2/0xb30 [ 60.977426] do_mprotect_pkey+0x87e/0xd40 [ 60.977952] __x64_sys_mprotect+0x78/0xc0 [ 60.978479] do_syscall_64+0x3f/0x90 [ 60.979057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.979728] [ 60.979949] Freed by task 211: [ 60.980354] kasan_save_stack+0x22/0x50 [ 60.980881] kasan_set_track+0x25/0x30 [ 60.981388] kasan_save_free_info+0x2b/0x50 [ 60.981939] __kasan_slab_free+0x10a/0x190 [ 60.982488] kmem_cache_free+0x10d/0x4d0 [ 60.983023] rcu_core+0x8c8/0x2860 [ 60.983477] __do_softirq+0x1b7/0x7d4 [ 60.983948] [ 60.984164] Last potentially related work creation: [ 60.984760] kasan_save_stack+0x22/0x50 [ 60.985270] __kasan_record_aux_stack+0x8e/0xa0 [ 60.985850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.986492] remove_vma+0x139/0x170 [ 60.986956] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.987526] do_vmi_munmap+0x1f1/0x2b0 [ 60.988039] __vm_munmap+0x138/0x3a0 [ 60.988511] __x64_sys_munmap+0x59/0x80 [ 60.989017] do_syscall_64+0x3f/0x90 [ 60.989515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.990172] [ 60.990392] The buggy address belongs to the object at ffff88800ddaa2b8 [ 60.990392] which belongs to the cache vm_area_struct of size 168 [ 60.991935] The buggy address is located 88 bytes inside of [ 60.991935] freed 168-byte region [ffff88800ddaa2b8, ffff88800ddaa360) [ 60.993343] [ 60.993559] The buggy address belongs to the physical page: [ 60.994225] page:000000005ebcbb34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddaa [ 60.995317] memcg:ffff88800e59db01 [ 60.995745] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.996438] page_type: 0xffffffff() [ 60.996889] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 60.997803] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e59db01 [ 60.998725] page dumped because: kasan: bad access detected [ 60.999400] [ 60.999619] Memory state around the buggy address: [ 61.000205] ffff88800ddaa200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 61.001066] ffff88800ddaa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 61.001930] >ffff88800ddaa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 61.002795] ^ [ 61.003268] ffff88800ddaa380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 61.004129] ffff88800ddaa400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 61.004987] ================================================================== [ 61.005980] Disabling lock debugging due to kernel taint [ 62.708884] BUG: Bad rss-counter state mm:0000000060228e2d type:MM_FILEPAGES val:33 [ 62.709920] BUG: Bad rss-counter state mm:0000000060228e2d type:MM_ANONPAGES val:22 [ 63.253264] BUG: Bad rss-counter state mm:00000000830a57de type:MM_FILEPAGES val:33 [ 63.254432] BUG: Bad rss-counter state mm:00000000830a57de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47535' (ECDSA) to the list of known hosts. 2023/06/21 02:35:07 fuzzer started 2023/06/21 02:35:08 dialing manager at localhost:36067 2023/06/21 02:35:08 checking machine... 2023/06/21 02:35:08 checking revisions... [ 63.862752] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:35:08 testing simple program... [ 63.902596] cgroup: Unknown subsys name 'net' [ 63.942355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:35:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86139744 RDX=1ffff110011b3f34 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008d9f9b0 RSP=ffff888008d9f8e8 R8 =ffffffff86139748 R9 =ffff888008d9f998 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008d9f9b8 R13=ffff888008d9f9a0 R14=ffff888008d9fcc8 R15=ffff888008d9f958 RIP=ffffffff81131c60 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 0000000000000000 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=00007f9ecfe7af20 CR3=000000000ca6a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8d735d678a1b833d00000000000ae988 XMM05=3ccf2867d9f4244700000000001326f0 XMM06=bdf2e299e47b49d50000000000131170 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e134a RSI=ffffffff83723dcf RDI=ffff88806cf09a50 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000975cd R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888015dbd1c0 R15=ffff88806cf09a50 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 00007f091ccb2900 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=00007fff0a565000 CR3=000000000e508000 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