syzkaller login: [ 30.328157] BUG: Bad rss-counter state mm:00000000a6ae69c8 type:MM_FILEPAGES val:33 [ 30.329462] BUG: Bad rss-counter state mm:00000000a6ae69c8 type:MM_ANONPAGES val:22 [ 30.370146] ================================================================== [ 30.371251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.372289] Read of size 8 at addr ffff8880094de798 by task sshd/220 [ 30.373137] [ 30.373394] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.374353] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.375440] Call Trace: [ 30.375795] [ 30.376117] dump_stack_lvl+0x91/0xf0 [ 30.376667] print_report+0xcc/0x620 [ 30.377199] ? __virt_addr_valid+0x102/0x340 [ 30.377822] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.378514] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.379199] kasan_report+0xbe/0xf0 [ 30.379722] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.380408] vma_interval_tree_remove+0xc75/0xec0 [ 30.381078] vma_prepare+0xc54/0x11a0 [ 30.381628] __split_vma+0x5af/0x950 [ 30.382151] ? __pfx___split_vma+0x10/0x10 [ 30.382737] ? find_held_lock+0x2c/0x110 [ 30.383318] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.383938] ? lock_is_held_type+0x9f/0x120 [ 30.384537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.385215] ? mtree_range_walk+0x632/0x900 [ 30.385830] ? mas_walk+0x5c7/0x7c0 [ 30.386354] do_vmi_munmap+0x1f1/0x2b0 [ 30.386903] mmap_region+0x1f9/0x2660 [ 30.387431] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.387998] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.388790] ? __pfx_lock_acquire+0x10/0x10 [ 30.389397] ? __pfx_mmap_region+0x10/0x10 [ 30.389986] ? security_mmap_addr+0x7d/0xa0 [ 30.390576] ? get_unmapped_area+0x1f5/0x3f0 [ 30.391190] do_mmap+0x854/0xf00 [ 30.391680] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.392235] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.392862] ksys_mmap_pgoff+0x3af/0x500 [ 30.393437] do_syscall_64+0x3f/0x90 [ 30.393962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.394677] RIP: 0033:0x7ff96eb88d82 [ 30.395185] 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 [ 30.397748] RSP: 002b:00007ffc26bc6238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.398721] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff96eb88d82 [ 30.399635] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff96dfc2000 [ 30.400532] RBP: 00007ff96dfc2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.401447] R10: 0000000000000812 R11: 0000000000000206 R12: 000056030e2bff70 [ 30.402351] R13: 00007ffc26bc6250 R14: 00007ffc26bc6280 R15: 00007ffc26bc65e0 [ 30.403261] [ 30.403570] [ 30.403799] Allocated by task 212: [ 30.404257] kasan_save_stack+0x22/0x50 [ 30.404801] kasan_set_track+0x25/0x30 [ 30.405336] __kasan_slab_alloc+0x59/0x70 [ 30.405902] kmem_cache_alloc+0x16b/0x370 [ 30.406450] vm_area_dup+0x20/0x160 [ 30.406935] __split_vma+0x170/0x950 [ 30.407440] split_vma+0xc6/0x110 [ 30.407917] mprotect_fixup+0x8d2/0xb30 [ 30.408457] do_mprotect_pkey+0x87e/0xd40 [ 30.409017] __x64_sys_mprotect+0x78/0xc0 [ 30.409600] do_syscall_64+0x3f/0x90 [ 30.410116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.410798] [ 30.411031] Freed by task 212: [ 30.411446] kasan_save_stack+0x22/0x50 [ 30.411985] kasan_set_track+0x25/0x30 [ 30.412515] kasan_save_free_info+0x2b/0x50 [ 30.413089] __kasan_slab_free+0x10a/0x190 [ 30.413670] kmem_cache_free+0x10d/0x4d0 [ 30.414218] rcu_core+0x8c8/0x2860 [ 30.414699] __do_softirq+0x1b7/0x7d4 [ 30.415211] [ 30.415442] Last potentially related work creation: [ 30.416069] kasan_save_stack+0x22/0x50 [ 30.416604] __kasan_record_aux_stack+0x8e/0xa0 [ 30.417220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.417926] remove_vma+0x139/0x170 [ 30.418410] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.419008] do_vmi_munmap+0x1f1/0x2b0 [ 30.419530] __vm_munmap+0x138/0x3a0 [ 30.420029] __x64_sys_munmap+0x59/0x80 [ 30.420565] do_syscall_64+0x3f/0x90 [ 30.421073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.421762] [ 30.421996] Second to last potentially related work creation: [ 30.422727] kasan_save_stack+0x22/0x50 [ 30.423269] __kasan_record_aux_stack+0x8e/0xa0 [ 30.423891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.424565] remove_vma+0x139/0x170 [ 30.425047] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.425664] do_vmi_munmap+0x1f1/0x2b0 [ 30.426184] move_vma.constprop.0+0x88a/0x1ba0 [ 30.426795] __do_sys_mremap+0xb78/0x1780 [ 30.427357] do_syscall_64+0x3f/0x90 [ 30.427861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.428539] [ 30.428771] The buggy address belongs to the object at ffff8880094de740 [ 30.428771] which belongs to the cache vm_area_struct of size 168 [ 30.430342] The buggy address is located 88 bytes inside of [ 30.430342] freed 168-byte region [ffff8880094de740, ffff8880094de7e8) [ 30.431840] [ 30.432076] The buggy address belongs to the physical page: [ 30.432773] page:000000008a77211c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94de [ 30.433937] memcg:ffff88800dc8e901 [ 30.434398] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.435145] page_type: 0xffffffff() [ 30.435630] raw: 0100000000000200 ffff88800879fc80 ffffea0000381000 dead000000000003 [ 30.436618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc8e901 [ 30.437609] page dumped because: kasan: bad access detected [ 30.438324] [ 30.438551] Memory state around the buggy address: [ 30.439183] ffff8880094de680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.440099] ffff8880094de700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.441005] >ffff8880094de780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.441914] ^ [ 30.442447] ffff8880094de800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.443366] ffff8880094de880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.444259] ================================================================== [ 30.445435] Disabling lock debugging due to kernel taint [ 32.380926] BUG: Bad rss-counter state mm:00000000d424ed96 type:MM_FILEPAGES val:33 [ 32.382464] BUG: Bad rss-counter state mm:00000000d424ed96 type:MM_ANONPAGES val:22 [ 32.831314] BUG: Bad rss-counter state mm:00000000fd6c02b1 type:MM_FILEPAGES val:33 [ 32.831853] BUG: Bad rss-counter state mm:00000000fd6c02b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13658' (ECDSA) to the list of known hosts. 2023/06/20 06:44:13 fuzzer started 2023/06/20 06:44:13 dialing manager at localhost:44161 2023/06/20 06:44:13 checking machine... 2023/06/20 06:44:13 checking revisions... [ 33.468360] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:44:13 testing simple program... [ 33.528809] cgroup: Unknown subsys name 'net' [ 33.574306] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:44:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fe755166260 CR3=000000000f1d2000 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=2e54e34e28484b974544005b605fc9fa XMM02=ec2efd57dc4c00df000000000011d250 XMM03=2d3ab99c6e1a584a000000000011d320 XMM04=8b5d9d7c879421f200000000000ae988 XMM05=4431b9501476bbc700000000001364b8 XMM06=4fda316b135da52b0000000000135300 XMM07=fb795ef6d65770560000000000123fd8 XMM08=2c67c8bc2e329bc3000000000011d2c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83874352 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110033ece49 RSI=ffffffff83874352 RDI=ffff888019f672b8 RBP=ffff888019f67288 RSP=ffff888019f671e8 R8 =0000000000000001 R9 =ffff888019f67230 R10=0000000000038001 R11=0000000000091bf6 R12=ffff888019f672b8 R13=0000000000000000 R14=ffff888019eed1c0 R15=0000000000001000 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007f3b495e9900 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=00007f3b49ba0618 CR3=000000000f254000 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=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