syzkaller login: [ 24.144752] BUG: Bad rss-counter state mm:000000001c90ca52 type:MM_FILEPAGES val:33 [ 24.146099] BUG: Bad rss-counter state mm:000000001c90ca52 type:MM_ANONPAGES val:22 [ 24.303837] ================================================================== [ 24.304742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.305691] Read of size 8 at addr ffff88800e7bb3f8 by task sshd/218 [ 24.306675] [ 24.306898] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.307753] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.308740] Call Trace: [ 24.309058] [ 24.309342] dump_stack_lvl+0x91/0xf0 [ 24.309859] print_report+0xcc/0x620 [ 24.310345] ? __virt_addr_valid+0x102/0x340 [ 24.310896] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.311513] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.312133] kasan_report+0xbe/0xf0 [ 24.312612] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.313231] vma_interval_tree_remove+0xc75/0xec0 [ 24.313845] vma_prepare+0xc54/0x11a0 [ 24.314322] __split_vma+0x5af/0x950 [ 24.314793] ? __pfx___split_vma+0x10/0x10 [ 24.315328] ? find_held_lock+0x2c/0x110 [ 24.315948] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.316505] ? lock_is_held_type+0x9f/0x120 [ 24.317031] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.317636] ? mtree_range_walk+0x632/0x900 [ 24.318185] ? mas_walk+0x5c7/0x7c0 [ 24.318654] do_vmi_munmap+0x1f1/0x2b0 [ 24.319141] mmap_region+0x1f9/0x2660 [ 24.319616] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.320122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.320822] ? __pfx_lock_acquire+0x10/0x10 [ 24.321346] ? __pfx_mmap_region+0x10/0x10 [ 24.321887] ? security_mmap_addr+0x7d/0xa0 [ 24.322411] ? get_unmapped_area+0x1f5/0x3f0 [ 24.322954] do_mmap+0x854/0xf00 [ 24.323386] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.323878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.324431] ksys_mmap_pgoff+0x3af/0x500 [ 24.324931] do_syscall_64+0x3f/0x90 [ 24.325403] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.326042] RIP: 0033:0x7fbcaeba8d82 [ 24.326491] 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 [ 24.328570] RSP: 002b:00007fff0a05a478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.329459] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbcaeba8d82 [ 24.330297] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbcadfe2000 [ 24.331134] RBP: 00007fbcadfe2000 R08: 0000000000000009 R09: 0000000000001000 [ 24.331971] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625fc432ec0 [ 24.332797] R13: 00007fff0a05a490 R14: 00007fff0a05a4c0 R15: 00007fff0a05a820 [ 24.333651] [ 24.333942] [ 24.334155] Allocated by task 211: [ 24.334574] kasan_save_stack+0x22/0x50 [ 24.335072] kasan_set_track+0x25/0x30 [ 24.335558] __kasan_slab_alloc+0x59/0x70 [ 24.336075] kmem_cache_alloc+0x16b/0x370 [ 24.336582] vm_area_dup+0x20/0x160 [ 24.337032] __split_vma+0x170/0x950 [ 24.337492] split_vma+0xc6/0x110 [ 24.337933] mprotect_fixup+0x8d2/0xb30 [ 24.338423] do_mprotect_pkey+0x87e/0xd40 [ 24.338933] __x64_sys_mprotect+0x78/0xc0 [ 24.339442] do_syscall_64+0x3f/0x90 [ 24.339907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.340542] [ 24.340754] Freed by task 211: [ 24.341140] kasan_save_stack+0x22/0x50 [ 24.341653] kasan_set_track+0x25/0x30 [ 24.342141] kasan_save_free_info+0x2b/0x50 [ 24.342670] __kasan_slab_free+0x10a/0x190 [ 24.343196] kmem_cache_free+0x10d/0x4d0 [ 24.343694] rcu_core+0x8c8/0x2860 [ 24.344132] __do_softirq+0x1b7/0x7d4 [ 24.344600] [ 24.344813] Last potentially related work creation: [ 24.345389] kasan_save_stack+0x22/0x50 [ 24.345892] __kasan_record_aux_stack+0x8e/0xa0 [ 24.346460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.347096] remove_vma+0x139/0x170 [ 24.347544] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.348096] do_vmi_munmap+0x1f1/0x2b0 [ 24.348572] __vm_munmap+0x138/0x3a0 [ 24.349032] __x64_sys_munmap+0x59/0x80 [ 24.349537] do_syscall_64+0x3f/0x90 [ 24.350004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.350634] [ 24.350847] The buggy address belongs to the object at ffff88800e7bb3a0 [ 24.350847] which belongs to the cache vm_area_struct of size 168 [ 24.352282] The buggy address is located 88 bytes inside of [ 24.352282] freed 168-byte region [ffff88800e7bb3a0, ffff88800e7bb448) [ 24.353653] [ 24.353868] The buggy address belongs to the physical page: [ 24.354513] page:000000008f7d66d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7bb [ 24.355592] memcg:ffff888009547a01 [ 24.356006] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.356637] page_type: 0xffffffff() [ 24.357075] raw: 0100000000000200 ffff88800879fc80 ffffea00003c00c0 dead000000000008 [ 24.357979] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009547a01 [ 24.358859] page dumped because: kasan: bad access detected [ 24.359495] [ 24.359706] Memory state around the buggy address: [ 24.360274] ffff88800e7bb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.361109] ffff88800e7bb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.361943] >ffff88800e7bb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.362764] ^ [ 24.363579] ffff88800e7bb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.364401] ffff88800e7bb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.365222] ================================================================== [ 24.366176] Disabling lock debugging due to kernel taint [ 26.215917] BUG: Bad rss-counter state mm:00000000744fd65b type:MM_FILEPAGES val:33 [ 26.216910] BUG: Bad rss-counter state mm:00000000744fd65b type:MM_ANONPAGES val:22 [ 26.718920] BUG: Bad rss-counter state mm:00000000175a4adf type:MM_FILEPAGES val:33 [ 26.719741] BUG: Bad rss-counter state mm:00000000175a4adf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65109' (ECDSA) to the list of known hosts. 2023/06/20 04:47:17 fuzzer started 2023/06/20 04:47:17 dialing manager at localhost:44161 2023/06/20 04:47:17 checking machine... 2023/06/20 04:47:17 checking revisions... [ 27.344185] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:47:17 testing simple program... [ 27.384502] cgroup: Unknown subsys name 'net' [ 27.447805] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:16 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=00007f601d676650 CR3=0000000019e3a000 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=2037313a37343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a37343a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c97ef7 RBX=ffff88800e4bf788 RCX=1ffff11001c2056a RDX=dffffc0000000000 RSI=ffff888019845a30 RDI=ffff88800e4bf7b8 RBP=ffff88800da06408 RSP=ffff888015f0fc58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880198458f8 R13=0000000000000000 R14=ffff88800fea2178 R15=ffff88800fea2130 RIP=ffffffff818474fe RFL=00000046 [---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 00007f601d0c1900 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=00007f601d678618 CR3=000000000f14e000 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