syzkaller login: [ 33.069829] BUG: Bad rss-counter state mm:0000000031ac4b70 type:MM_FILEPAGES val:33 [ 33.071662] BUG: Bad rss-counter state mm:0000000031ac4b70 type:MM_ANONPAGES val:22 [ 33.249180] ================================================================== [ 33.250198] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.251183] Read of size 8 at addr ffff88800e1ff058 by task sshd/220 [ 33.251988] [ 33.252214] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.253186] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.254244] Call Trace: [ 33.254582] [ 33.254883] dump_stack_lvl+0x91/0xf0 [ 33.255398] print_report+0xcc/0x620 [ 33.255903] ? __virt_addr_valid+0x102/0x340 [ 33.256486] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.257138] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.257799] kasan_report+0xbe/0xf0 [ 33.258299] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.258958] vma_interval_tree_remove+0xc75/0xec0 [ 33.259583] vma_prepare+0xc54/0x11a0 [ 33.260080] __split_vma+0x5af/0x950 [ 33.260570] ? __pfx___split_vma+0x10/0x10 [ 33.261116] ? find_held_lock+0x2c/0x110 [ 33.261664] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.262249] ? lock_is_held_type+0x9f/0x120 [ 33.262811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.263441] ? mtree_range_walk+0x632/0x900 [ 33.264017] ? mas_walk+0x5c7/0x7c0 [ 33.264507] do_vmi_munmap+0x1f1/0x2b0 [ 33.265016] mmap_region+0x1f9/0x2660 [ 33.265538] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.266069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.266817] ? __pfx_lock_acquire+0x10/0x10 [ 33.267370] ? __pfx_mmap_region+0x10/0x10 [ 33.267928] ? security_mmap_addr+0x7d/0xa0 [ 33.268481] ? get_unmapped_area+0x1f5/0x3f0 [ 33.269052] do_mmap+0x854/0xf00 [ 33.269524] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.270038] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.270619] ksys_mmap_pgoff+0x3af/0x500 [ 33.271144] do_syscall_64+0x3f/0x90 [ 33.271636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.272307] RIP: 0033:0x7f75b8414d82 [ 33.272782] 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 [ 33.275027] RSP: 002b:00007ffec24eb8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.275966] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75b8414d82 [ 33.276852] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75b784e000 [ 33.277756] RBP: 00007f75b784e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.278642] R10: 0000000000000812 R11: 0000000000000206 R12: 000056018edcff70 [ 33.279524] R13: 00007ffec24eb8d0 R14: 00007ffec24eb900 R15: 00007ffec24ebc60 [ 33.280422] [ 33.280728] [ 33.280950] Allocated by task 213: [ 33.281403] kasan_save_stack+0x22/0x50 [ 33.281932] kasan_set_track+0x25/0x30 [ 33.282443] __kasan_slab_alloc+0x59/0x70 [ 33.282988] kmem_cache_alloc+0x16b/0x370 [ 33.283530] vm_area_dup+0x20/0x160 [ 33.284001] __split_vma+0x170/0x950 [ 33.284484] split_vma+0xc6/0x110 [ 33.284939] mprotect_fixup+0x8d2/0xb30 [ 33.285470] do_mprotect_pkey+0x87e/0xd40 [ 33.286064] __x64_sys_mprotect+0x78/0xc0 [ 33.286706] do_syscall_64+0x3f/0x90 [ 33.287287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.288078] [ 33.288329] Freed by task 213: [ 33.288791] kasan_save_stack+0x22/0x50 [ 33.289394] kasan_set_track+0x25/0x30 [ 33.289982] kasan_save_free_info+0x2b/0x50 [ 33.290616] __kasan_slab_free+0x10a/0x190 [ 33.291240] kmem_cache_free+0x10d/0x4d0 [ 33.291837] rcu_core+0x8c8/0x2860 [ 33.292359] __do_softirq+0x1b7/0x7d4 [ 33.292927] [ 33.293188] Last potentially related work creation: [ 33.293914] kasan_save_stack+0x22/0x50 [ 33.294526] __kasan_record_aux_stack+0x8e/0xa0 [ 33.295150] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.295800] remove_vma+0x139/0x170 [ 33.296256] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.296842] do_vmi_munmap+0x1f1/0x2b0 [ 33.297369] __vm_munmap+0x138/0x3a0 [ 33.297847] __x64_sys_munmap+0x59/0x80 [ 33.298378] do_syscall_64+0x3f/0x90 [ 33.298857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.299500] [ 33.299725] Second to last potentially related work creation: [ 33.300432] kasan_save_stack+0x22/0x50 [ 33.300944] __kasan_record_aux_stack+0x8e/0xa0 [ 33.301518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.302166] remove_vma+0x139/0x170 [ 33.302628] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.303194] do_vmi_munmap+0x1f1/0x2b0 [ 33.303697] mmap_region+0x1f9/0x2660 [ 33.304187] do_mmap+0x854/0xf00 [ 33.304627] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.305140] ksys_mmap_pgoff+0x3af/0x500 [ 33.305663] do_syscall_64+0x3f/0x90 [ 33.306147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.306809] [ 33.307032] The buggy address belongs to the object at ffff88800e1ff000 [ 33.307032] which belongs to the cache vm_area_struct of size 168 [ 33.308550] The buggy address is located 88 bytes inside of [ 33.308550] freed 168-byte region [ffff88800e1ff000, ffff88800e1ff0a8) [ 33.310022] [ 33.310241] The buggy address belongs to the physical page: [ 33.310934] page:00000000f44a50a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1ff [ 33.312045] memcg:ffff88800e533e01 [ 33.312490] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.313209] page_type: 0xffffffff() [ 33.313688] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.314640] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e533e01 [ 33.315578] page dumped because: kasan: bad access detected [ 33.316263] [ 33.316486] Memory state around the buggy address: [ 33.317085] ffff88800e1fef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.317989] ffff88800e1fef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.318877] >ffff88800e1ff000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.319771] ^ [ 33.320526] ffff88800e1ff080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 33.321420] ffff88800e1ff100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.322306] ================================================================== [ 33.323432] Disabling lock debugging due to kernel taint [ 35.172546] BUG: Bad rss-counter state mm:00000000f4bfad29 type:MM_FILEPAGES val:33 [ 35.173572] BUG: Bad rss-counter state mm:00000000f4bfad29 type:MM_ANONPAGES val:22 [ 35.618618] BUG: Bad rss-counter state mm:0000000021eb9426 type:MM_FILEPAGES val:33 [ 35.619818] BUG: Bad rss-counter state mm:0000000021eb9426 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2378' (ECDSA) to the list of known hosts. 2023/06/19 19:57:48 fuzzer started 2023/06/19 19:57:48 dialing manager at localhost:44161 2023/06/19 19:57:48 checking machine... 2023/06/19 19:57:48 checking revisions... [ 36.283256] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:57:48 testing simple program... [ 36.339359] cgroup: Unknown subsys name 'net' [ 36.390976] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:57:46 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007fc96a404c64 RCX=0000000000000000 RDX=ffff888015c20000 RSI=ffffffff81007b6c RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888015c1f248 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff888015c1f390 R13=0000000000000000 R14=ffff888015c20000 R15=0000000000000cc0 RIP=ffffffff814c0800 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 00007fc969b4b900 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=00007fc968f52c00 CR3=000000000d604000 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=213b2a09a6715c9c00000000000ae988 XMM05=20ffdfdea2a33cee0000000000136978 XMM06=4fda316b135da52b0000000000135768 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000001751237afc RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=0000000000053934 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef3c5 R11=0000000000000001 R12=0000000000053934 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000016 [----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 00007f3e140cc900 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=00007ffc65138000 CR3=000000001bc6c000 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