syzkaller login: [ 31.213000] BUG: Bad rss-counter state mm:00000000b6511399 type:MM_FILEPAGES val:33 [ 31.214204] BUG: Bad rss-counter state mm:00000000b6511399 type:MM_ANONPAGES val:22 [ 31.250619] ================================================================== [ 31.251517] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.252605] Read of size 8 at addr ffff888016938d08 by task sshd/220 [ 31.253478] [ 31.253697] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.254565] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.255556] Call Trace: [ 31.255874] [ 31.256165] dump_stack_lvl+0x91/0xf0 [ 31.256678] print_report+0xcc/0x620 [ 31.257159] ? __virt_addr_valid+0x102/0x340 [ 31.257713] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258336] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.258952] kasan_report+0xbe/0xf0 [ 31.259442] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.260067] vma_interval_tree_remove+0xc75/0xec0 [ 31.260679] vma_prepare+0xc54/0x11a0 [ 31.261163] __split_vma+0x5af/0x950 [ 31.261637] ? __pfx___split_vma+0x10/0x10 [ 31.262170] ? find_held_lock+0x2c/0x110 [ 31.262690] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.263247] ? lock_is_held_type+0x9f/0x120 [ 31.263783] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.264402] ? mtree_range_walk+0x632/0x900 [ 31.264959] ? mas_walk+0x5c7/0x7c0 [ 31.265431] do_vmi_munmap+0x1f1/0x2b0 [ 31.265927] mmap_region+0x1f9/0x2660 [ 31.266404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.266913] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.267618] ? __pfx_lock_acquire+0x10/0x10 [ 31.268151] ? __pfx_mmap_region+0x10/0x10 [ 31.268688] ? security_mmap_addr+0x7d/0xa0 [ 31.269215] ? get_unmapped_area+0x1f5/0x3f0 [ 31.269761] do_mmap+0x854/0xf00 [ 31.270210] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.270700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.271260] ksys_mmap_pgoff+0x3af/0x500 [ 31.271763] do_syscall_64+0x3f/0x90 [ 31.272246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272902] RIP: 0033:0x7f9501be6d82 [ 31.273355] 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 [ 31.275460] RSP: 002b:00007ffd3e273068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.276376] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9501be6d82 [ 31.277221] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9501020000 [ 31.278060] RBP: 00007f9501020000 R08: 0000000000000009 R09: 0000000000001000 [ 31.278908] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618b5462ec0 [ 31.279743] R13: 00007ffd3e273080 R14: 00007ffd3e2730b0 R15: 00007ffd3e273410 [ 31.280617] [ 31.280906] [ 31.281119] Allocated by task 213: [ 31.281546] kasan_save_stack+0x22/0x50 [ 31.282053] kasan_set_track+0x25/0x30 [ 31.282540] __kasan_slab_alloc+0x59/0x70 [ 31.283067] kmem_cache_alloc+0x16b/0x370 [ 31.283581] vm_area_dup+0x20/0x160 [ 31.284032] __split_vma+0x170/0x950 [ 31.284510] split_vma+0xc6/0x110 [ 31.284950] mprotect_fixup+0x8d2/0xb30 [ 31.285455] do_mprotect_pkey+0x87e/0xd40 [ 31.285979] __x64_sys_mprotect+0x78/0xc0 [ 31.286500] do_syscall_64+0x3f/0x90 [ 31.286971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287605] [ 31.287818] Freed by task 213: [ 31.288214] kasan_save_stack+0x22/0x50 [ 31.288719] kasan_set_track+0x25/0x30 [ 31.289215] kasan_save_free_info+0x2b/0x50 [ 31.289742] __kasan_slab_free+0x10a/0x190 [ 31.290281] kmem_cache_free+0x10d/0x4d0 [ 31.290811] rcu_core+0x8c8/0x2860 [ 31.291275] __do_softirq+0x1b7/0x7d4 [ 31.291750] [ 31.291965] Last potentially related work creation: [ 31.292568] kasan_save_stack+0x22/0x50 [ 31.293067] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294283] remove_vma+0x139/0x170 [ 31.294731] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295288] do_vmi_munmap+0x1f1/0x2b0 [ 31.295775] __vm_munmap+0x138/0x3a0 [ 31.296252] __x64_sys_munmap+0x59/0x80 [ 31.296742] do_syscall_64+0x3f/0x90 [ 31.297226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297868] [ 31.298082] The buggy address belongs to the object at ffff888016938cb0 [ 31.298082] which belongs to the cache vm_area_struct of size 168 [ 31.299544] The buggy address is located 88 bytes inside of [ 31.299544] freed 168-byte region [ffff888016938cb0, ffff888016938d58) [ 31.301025] [ 31.301246] The buggy address belongs to the physical page: [ 31.301904] page:00000000dfad2400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16938 [ 31.302996] memcg:ffff888019c76501 [ 31.303426] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.304074] page_type: 0xffffffff() [ 31.304539] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.305461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c76501 [ 31.306360] page dumped because: kasan: bad access detected [ 31.307016] [ 31.307228] Memory state around the buggy address: [ 31.307809] ffff888016938c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.308679] ffff888016938c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.309524] >ffff888016938d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.310386] ^ [ 31.310826] ffff888016938d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.311684] ffff888016938e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.312549] ================================================================== [ 31.313580] Disabling lock debugging due to kernel taint [ 33.125291] BUG: Bad rss-counter state mm:00000000f6fb1a9c type:MM_FILEPAGES val:33 [ 33.126370] BUG: Bad rss-counter state mm:00000000f6fb1a9c type:MM_ANONPAGES val:22 [ 33.611264] BUG: Bad rss-counter state mm:00000000dfb3c7d3 type:MM_FILEPAGES val:33 [ 33.612432] BUG: Bad rss-counter state mm:00000000dfb3c7d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47265' (ECDSA) to the list of known hosts. 2023/06/20 22:52:57 fuzzer started 2023/06/20 22:52:57 dialing manager at localhost:36067 2023/06/20 22:52:57 checking machine... 2023/06/20 22:52:57 checking revisions... [ 34.324412] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:52:57 testing simple program... [ 34.371462] cgroup: Unknown subsys name 'net' [ 34.411093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:52:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86139744 RDX=0000000000000001 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=ffffffff81131153 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=00007f9c54c92000 CR3=000000000d91a000 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=c06e20af09c5caa4e74ae01614f9391e XMM02=2c67c8bc2e329bc3000000000011a708 XMM03=fb795ef6d65770560000000000121bc8 XMM04=7537913683440f4500000000000ae988 XMM05=414aa93141fc4b0f0000000000131f18 XMM06=4fda316b135da52b0000000000131910 XMM07=e042d86d42eb936e0000000000121e48 XMM08=d99260db59a9d92f000000000011a768 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180effe RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110011c6f31 RSI=ffffffff8180effe RDI=ffff888008e379f8 RBP=ffff888008e379c8 RSP=ffff888008e37928 R8 =ffffffff86138e90 R9 =ffff888008e37970 R10=0000000000038001 R11=0000000000020d8f R12=ffff888008e379f8 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88800e453280 RIP=ffffffff84538440 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 0000000000000000 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=00007fcaebd09618 CR3=00000000094a0000 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