syzkaller login: [ 36.178488] BUG: Bad rss-counter state mm:000000000a1405b9 type:MM_FILEPAGES val:33 [ 36.179803] BUG: Bad rss-counter state mm:000000000a1405b9 type:MM_ANONPAGES val:22 [ 36.223189] ================================================================== [ 36.224192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.225170] Read of size 8 at addr ffff88801a24ed08 by task sshd/221 [ 36.225970] [ 36.226196] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.227095] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.228124] Call Trace: [ 36.228461] [ 36.228757] dump_stack_lvl+0x91/0xf0 [ 36.229275] print_report+0xcc/0x620 [ 36.229785] ? __virt_addr_valid+0x102/0x340 [ 36.230356] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.231007] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.231679] kasan_report+0xbe/0xf0 [ 36.232181] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.232833] vma_interval_tree_remove+0xc75/0xec0 [ 36.233468] vma_prepare+0xc54/0x11a0 [ 36.233970] __split_vma+0x5af/0x950 [ 36.234462] ? __pfx___split_vma+0x10/0x10 [ 36.235026] ? find_held_lock+0x2c/0x110 [ 36.235585] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.236178] ? lock_is_held_type+0x9f/0x120 [ 36.236736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.237364] ? mtree_range_walk+0x632/0x900 [ 36.237934] ? mas_walk+0x5c7/0x7c0 [ 36.238428] do_vmi_munmap+0x1f1/0x2b0 [ 36.238939] mmap_region+0x1f9/0x2660 [ 36.239445] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.239979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.240711] ? __pfx_lock_acquire+0x10/0x10 [ 36.241263] ? __pfx_mmap_region+0x10/0x10 [ 36.241816] ? security_mmap_addr+0x7d/0xa0 [ 36.242368] ? get_unmapped_area+0x1f5/0x3f0 [ 36.242942] do_mmap+0x854/0xf00 [ 36.243402] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.243940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.244533] ksys_mmap_pgoff+0x3af/0x500 [ 36.245062] do_syscall_64+0x3f/0x90 [ 36.245556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.246228] RIP: 0033:0x7f9d2ea8ed82 [ 36.246705] 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 [ 36.248947] RSP: 002b:00007fffdf716918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.249882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d2ea8ed82 [ 36.250768] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d2dec8000 [ 36.251663] RBP: 00007f9d2dec8000 R08: 0000000000000009 R09: 0000000000001000 [ 36.252543] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557cc1b1f70 [ 36.253420] R13: 00007fffdf716930 R14: 00007fffdf716960 R15: 00007fffdf716cc0 [ 36.254308] [ 36.254612] [ 36.254832] Allocated by task 214: [ 36.255270] kasan_save_stack+0x22/0x50 [ 36.255803] kasan_set_track+0x25/0x30 [ 36.256316] __kasan_slab_alloc+0x59/0x70 [ 36.256854] kmem_cache_alloc+0x16b/0x370 [ 36.257393] vm_area_dup+0x20/0x160 [ 36.257862] __split_vma+0x170/0x950 [ 36.258356] split_vma+0xc6/0x110 [ 36.258810] mprotect_fixup+0x8d2/0xb30 [ 36.259324] do_mprotect_pkey+0x87e/0xd40 [ 36.259877] __x64_sys_mprotect+0x78/0xc0 [ 36.260420] do_syscall_64+0x3f/0x90 [ 36.260914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.261577] [ 36.261797] Freed by task 214: [ 36.262199] kasan_save_stack+0x22/0x50 [ 36.262718] kasan_set_track+0x25/0x30 [ 36.263225] kasan_save_free_info+0x2b/0x50 [ 36.263782] __kasan_slab_free+0x10a/0x190 [ 36.264333] kmem_cache_free+0x10d/0x4d0 [ 36.264853] rcu_core+0x8c8/0x2860 [ 36.265307] __do_softirq+0x1b7/0x7d4 [ 36.265800] [ 36.266021] Last potentially related work creation: [ 36.266616] kasan_save_stack+0x22/0x50 [ 36.267127] __kasan_record_aux_stack+0x8e/0xa0 [ 36.267726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.268387] remove_vma+0x139/0x170 [ 36.268853] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.269428] do_vmi_munmap+0x1f1/0x2b0 [ 36.269931] __vm_munmap+0x138/0x3a0 [ 36.270410] __x64_sys_munmap+0x59/0x80 [ 36.270907] do_syscall_64+0x3f/0x90 [ 36.271378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.272051] [ 36.272268] The buggy address belongs to the object at ffff88801a24ecb0 [ 36.272268] which belongs to the cache vm_area_struct of size 168 [ 36.273745] The buggy address is located 88 bytes inside of [ 36.273745] freed 168-byte region [ffff88801a24ecb0, ffff88801a24ed58) [ 36.275156] [ 36.275376] The buggy address belongs to the physical page: [ 36.276047] page:000000007c51683e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a24e [ 36.277149] memcg:ffff88801a126401 [ 36.277579] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.278227] page_type: 0xffffffff() [ 36.278691] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.279623] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a126401 [ 36.280547] page dumped because: kasan: bad access detected [ 36.281211] [ 36.281427] Memory state around the buggy address: [ 36.282005] ffff88801a24ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 36.282882] ffff88801a24ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.283887] >ffff88801a24ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.284751] ^ [ 36.285194] ffff88801a24ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.286071] ffff88801a24ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.287028] ================================================================== [ 36.288378] Disabling lock debugging due to kernel taint [ 38.051666] BUG: Bad rss-counter state mm:0000000083a4df0c type:MM_FILEPAGES val:33 [ 38.053038] BUG: Bad rss-counter state mm:0000000083a4df0c type:MM_ANONPAGES val:22 [ 38.598589] BUG: Bad rss-counter state mm:0000000084e00b06 type:MM_FILEPAGES val:33 [ 38.599781] BUG: Bad rss-counter state mm:0000000084e00b06 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34012' (ECDSA) to the list of known hosts. 2023/06/19 18:00:52 fuzzer started 2023/06/19 18:00:53 dialing manager at localhost:44161 2023/06/19 18:00:53 checking machine... 2023/06/19 18:00:53 checking revisions... [ 39.214186] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:00:53 testing simple program... [ 39.260651] cgroup: Unknown subsys name 'net' [ 39.317061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:00:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880198ed1c0 RSI=ffffffff83744040 RDI=ffff88800e45e3c0 RBP=ffff888008f7d000 RSP=ffff888019d5fb10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008f7d698 R13=ffff88800e45e3c0 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff838767e4 RFL=00000293 [--S-A-C] 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 00007f3e3a90c900 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=00007f3e3aec3618 CR3=000000000f650000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f1adc5361c0 CR3=000000000d912000 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=5b4a847d91dea5b4c04baf2f961348b7 XMM02=000000000011e820eff9b2d0a8fce9cb XMM03=000000000011e8f02c67c8bc2e329bc3 XMM04=6ca5c746c93adc0300000000000ae988 XMM05=e4cb8bb95a7664b60000000000134e40 XMM06=ed833d21156ec2850000000000133ca8 XMM07=e042d86d42eb936e0000000000125540 XMM08=4f0fcc2c076ef52b000000000011e8f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000