syzkaller login: [ 30.492710] BUG: Bad rss-counter state mm:0000000020c0b514 type:MM_FILEPAGES val:33 [ 30.493995] BUG: Bad rss-counter state mm:0000000020c0b514 type:MM_ANONPAGES val:22 [ 30.653829] ================================================================== [ 30.654774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.655874] Read of size 8 at addr ffff888009478310 by task sshd/222 [ 30.656831] [ 30.657110] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.658031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.659062] Call Trace: [ 30.659488] [ 30.659873] dump_stack_lvl+0x91/0xf0 [ 30.660520] print_report+0xcc/0x620 [ 30.661057] ? __virt_addr_valid+0x102/0x340 [ 30.661647] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.662266] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.662928] kasan_report+0xbe/0xf0 [ 30.663438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664131] vma_interval_tree_remove+0xc75/0xec0 [ 30.664797] vma_prepare+0xc54/0x11a0 [ 30.665303] __split_vma+0x5af/0x950 [ 30.665801] ? __pfx___split_vma+0x10/0x10 [ 30.666353] ? find_held_lock+0x2c/0x110 [ 30.666943] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.667537] ? lock_is_held_type+0x9f/0x120 [ 30.668107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.668740] ? mtree_range_walk+0x632/0x900 [ 30.669321] ? mas_walk+0x5c7/0x7c0 [ 30.669868] do_vmi_munmap+0x1f1/0x2b0 [ 30.670415] mmap_region+0x1f9/0x2660 [ 30.670947] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.671522] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.672284] ? __pfx_lock_acquire+0x10/0x10 [ 30.672923] ? __pfx_mmap_region+0x10/0x10 [ 30.673538] ? security_mmap_addr+0x7d/0xa0 [ 30.674103] ? get_unmapped_area+0x1f5/0x3f0 [ 30.674716] do_mmap+0x854/0xf00 [ 30.675217] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.675764] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.676499] ksys_mmap_pgoff+0x3af/0x500 [ 30.677131] do_syscall_64+0x3f/0x90 [ 30.677676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678399] RIP: 0033:0x7f2ae614cd82 [ 30.678938] 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 [ 30.681347] RSP: 002b:00007fff24d3a4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.682373] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ae614cd82 [ 30.683319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ae5586000 [ 30.684307] RBP: 00007f2ae5586000 R08: 0000000000000009 R09: 0000000000001000 [ 30.685227] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594add05b20 [ 30.686193] R13: 00007fff24d3a4e0 R14: 00007fff24d3a510 R15: 00007fff24d3a870 [ 30.687226] [ 30.687548] [ 30.687771] Allocated by task 215: [ 30.688232] kasan_save_stack+0x22/0x50 [ 30.688805] kasan_set_track+0x25/0x30 [ 30.689324] __kasan_slab_alloc+0x59/0x70 [ 30.689890] kmem_cache_alloc+0x16b/0x370 [ 30.690447] vm_area_dup+0x20/0x160 [ 30.690944] __split_vma+0x170/0x950 [ 30.691444] split_vma+0xc6/0x110 [ 30.691905] mprotect_fixup+0x8d2/0xb30 [ 30.692493] do_mprotect_pkey+0x87e/0xd40 [ 30.693038] __x64_sys_mprotect+0x78/0xc0 [ 30.693681] do_syscall_64+0x3f/0x90 [ 30.694278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.695104] [ 30.695346] Freed by task 215: [ 30.695809] kasan_save_stack+0x22/0x50 [ 30.696439] kasan_set_track+0x25/0x30 [ 30.697000] kasan_save_free_info+0x2b/0x50 [ 30.697564] __kasan_slab_free+0x10a/0x190 [ 30.698124] kmem_cache_free+0x10d/0x4d0 [ 30.698695] rcu_core+0x8c8/0x2860 [ 30.699189] __do_softirq+0x1b7/0x7d4 [ 30.699686] [ 30.699914] Last potentially related work creation: [ 30.700532] kasan_save_stack+0x22/0x50 [ 30.701155] __kasan_record_aux_stack+0x8e/0xa0 [ 30.701785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.702465] remove_vma+0x139/0x170 [ 30.702954] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.703538] do_vmi_munmap+0x1f1/0x2b0 [ 30.704076] __vm_munmap+0x138/0x3a0 [ 30.704572] __x64_sys_munmap+0x59/0x80 [ 30.705107] do_syscall_64+0x3f/0x90 [ 30.705636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.706329] [ 30.706634] The buggy address belongs to the object at ffff8880094782b8 [ 30.706634] which belongs to the cache vm_area_struct of size 168 [ 30.708299] The buggy address is located 88 bytes inside of [ 30.708299] freed 168-byte region [ffff8880094782b8, ffff888009478360) [ 30.709879] [ 30.710135] The buggy address belongs to the physical page: [ 30.710898] page:00000000d89ecf8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9478 [ 30.712159] memcg:ffff88800f9d2a01 [ 30.712756] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.713488] page_type: 0xffffffff() [ 30.713978] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.714992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f9d2a01 [ 30.716061] page dumped because: kasan: bad access detected [ 30.716764] [ 30.716991] Memory state around the buggy address: [ 30.717600] ffff888009478200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.718491] ffff888009478280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.719444] >ffff888009478300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.720438] ^ [ 30.720941] ffff888009478380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.721843] ffff888009478400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.722847] ================================================================== [ 30.724056] Disabling lock debugging due to kernel taint [ 32.823970] BUG: Bad rss-counter state mm:000000002a173124 type:MM_FILEPAGES val:33 [ 32.825041] BUG: Bad rss-counter state mm:000000002a173124 type:MM_ANONPAGES val:22 [ 33.352333] BUG: Bad rss-counter state mm:00000000aca32571 type:MM_FILEPAGES val:33 [ 33.353565] BUG: Bad rss-counter state mm:00000000aca32571 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31449' (ECDSA) to the list of known hosts. 2023/06/19 14:36:28 fuzzer started 2023/06/19 14:36:28 dialing manager at localhost:44161 2023/06/19 14:36:28 checking machine... 2023/06/19 14:36:28 checking revisions... [ 33.990152] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:36:28 testing simple program... [ 34.038359] cgroup: Unknown subsys name 'net' [ 34.096085] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:36:28 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888018e07d80 RCX=ffffffff83874edc RDX=ffff888018fe51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000014 RSP=ffff888018e07be0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000014 R13=0000000000000000 R14=0000000000000000 R15=ffff888018e458c0 RIP=ffffffff814c07eb 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 00007f4224580900 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=00007f4224b37618 CR3=000000000cb44000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002b02eae RSP=ffff888015817550 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=0000000000000dc0 RIP=ffffffff8135b8e5 RFL=00000247 [---Z-PC] 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 00007f66265bf900 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=00007f6625a4ef10 CR3=000000001375c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=260402bddbcce6e000000000000ae988 XMM05=2faa46910ff75d0c0000000000134c78 XMM06=59d5b690e0af863b0000000000133b10 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000