syzkaller login: [ 34.195782] BUG: Bad rss-counter state mm:0000000028743256 type:MM_FILEPAGES val:33 [ 34.197580] BUG: Bad rss-counter state mm:0000000028743256 type:MM_ANONPAGES val:22 [ 34.336622] ================================================================== [ 34.337797] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.339027] Read of size 8 at addr ffff888016723d08 by task sshd/222 [ 34.340154] [ 34.340432] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.341565] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.342884] Call Trace: [ 34.343306] [ 34.343669] dump_stack_lvl+0x91/0xf0 [ 34.344304] print_report+0xcc/0x620 [ 34.344937] ? __virt_addr_valid+0x102/0x340 [ 34.345574] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.346199] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.346844] kasan_report+0xbe/0xf0 [ 34.347329] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.347959] vma_interval_tree_remove+0xc75/0xec0 [ 34.348574] vma_prepare+0xc54/0x11a0 [ 34.349060] __split_vma+0x5af/0x950 [ 34.349545] ? __pfx___split_vma+0x10/0x10 [ 34.350082] ? find_held_lock+0x2c/0x110 [ 34.350612] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.351194] ? lock_is_held_type+0x9f/0x120 [ 34.351744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.352363] ? mtree_range_walk+0x632/0x900 [ 34.352921] ? mas_walk+0x5c7/0x7c0 [ 34.353402] do_vmi_munmap+0x1f1/0x2b0 [ 34.353909] mmap_region+0x1f9/0x2660 [ 34.354407] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.354984] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.355752] ? __pfx_lock_acquire+0x10/0x10 [ 34.356325] ? __pfx_mmap_region+0x10/0x10 [ 34.356891] ? security_mmap_addr+0x7d/0xa0 [ 34.357446] ? get_unmapped_area+0x1f5/0x3f0 [ 34.358028] do_mmap+0x854/0xf00 [ 34.358494] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.359037] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.359626] ksys_mmap_pgoff+0x3af/0x500 [ 34.360167] do_syscall_64+0x3f/0x90 [ 34.360675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.361354] RIP: 0033:0x7f0f06d99d82 [ 34.361835] 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 [ 34.364133] RSP: 002b:00007ffd5e1f41e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.365101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f06d99d82 [ 34.366024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f061d3000 [ 34.366959] RBP: 00007f0f061d3000 R08: 0000000000000009 R09: 0000000000001000 [ 34.367864] R10: 0000000000000812 R11: 0000000000000206 R12: 000055669cb84ec0 [ 34.368773] R13: 00007ffd5e1f4200 R14: 00007ffd5e1f4230 R15: 00007ffd5e1f4590 [ 34.369681] [ 34.369994] [ 34.370227] Allocated by task 215: [ 34.370691] kasan_save_stack+0x22/0x50 [ 34.371221] kasan_set_track+0x25/0x30 [ 34.371752] __kasan_slab_alloc+0x59/0x70 [ 34.372312] kmem_cache_alloc+0x16b/0x370 [ 34.372853] vm_area_dup+0x20/0x160 [ 34.373335] __split_vma+0x170/0x950 [ 34.373833] split_vma+0xc6/0x110 [ 34.374297] mprotect_fixup+0x8d2/0xb30 [ 34.374855] do_mprotect_pkey+0x87e/0xd40 [ 34.375403] __x64_sys_mprotect+0x78/0xc0 [ 34.375962] do_syscall_64+0x3f/0x90 [ 34.376465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.377143] [ 34.377377] Freed by task 215: [ 34.377798] kasan_save_stack+0x22/0x50 [ 34.378344] kasan_set_track+0x25/0x30 [ 34.378872] kasan_save_free_info+0x2b/0x50 [ 34.379450] __kasan_slab_free+0x10a/0x190 [ 34.380014] kmem_cache_free+0x10d/0x4d0 [ 34.380553] rcu_core+0x8c8/0x2860 [ 34.381020] __do_softirq+0x1b7/0x7d4 [ 34.381529] [ 34.381755] Last potentially related work creation: [ 34.382379] kasan_save_stack+0x22/0x50 [ 34.382930] __kasan_record_aux_stack+0x8e/0xa0 [ 34.383547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.384225] remove_vma+0x139/0x170 [ 34.384708] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.385303] do_vmi_munmap+0x1f1/0x2b0 [ 34.385822] __vm_munmap+0x138/0x3a0 [ 34.386326] __x64_sys_munmap+0x59/0x80 [ 34.386875] do_syscall_64+0x3f/0x90 [ 34.387381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.388059] [ 34.388292] The buggy address belongs to the object at ffff888016723cb0 [ 34.388292] which belongs to the cache vm_area_struct of size 168 [ 34.389864] The buggy address is located 88 bytes inside of [ 34.389864] freed 168-byte region [ffff888016723cb0, ffff888016723d58) [ 34.391393] [ 34.391623] The buggy address belongs to the physical page: [ 34.392329] page:00000000dedb9733 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16723 [ 34.393491] memcg:ffff88800f3a4101 [ 34.393956] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.394639] page_type: 0xffffffff() [ 34.395129] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.396098] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3a4101 [ 34.397066] page dumped because: kasan: bad access detected [ 34.397768] [ 34.397996] Memory state around the buggy address: [ 34.398618] ffff888016723c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.399548] ffff888016723c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.400465] >ffff888016723d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.401376] ^ [ 34.401844] ffff888016723d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.402779] ffff888016723e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.403693] ================================================================== [ 34.404750] Disabling lock debugging due to kernel taint [ 37.157418] BUG: Bad rss-counter state mm:000000003bd7fea9 type:MM_FILEPAGES val:33 [ 37.158614] BUG: Bad rss-counter state mm:000000003bd7fea9 type:MM_ANONPAGES val:22 [ 37.625592] BUG: Bad rss-counter state mm:00000000dc312abd type:MM_FILEPAGES val:33 [ 37.626770] BUG: Bad rss-counter state mm:00000000dc312abd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21019' (ECDSA) to the list of known hosts. 2023/06/20 10:45:37 fuzzer started 2023/06/20 10:45:38 dialing manager at localhost:44161 2023/06/20 10:45:38 checking machine... 2023/06/20 10:45:38 checking revisions... [ 38.408215] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:45:38 testing simple program... [ 38.461252] cgroup: Unknown subsys name 'net' [ 38.525941] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:45:34 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=00007ffdf4a5cef8 CR3=000000000f226000 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=2037333a35343a3031203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a35343a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019e83680 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff888019e83a74 RBP=00007f6326513163 RSP=ffff88806cf09a00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f6326513163 R13=0000000000000000 R14=ffff888019e83680 R15=ffff88800dc4f180 RIP=ffffffff8135bd1b RFL=00000217 [----APC] 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 00007f6326020900 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=00007f63265d7618 CR3=000000000dd98000 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