syzkaller login: [ 36.119139] sshd (213) used greatest stack depth: 24128 bytes left [ 36.120449] BUG: Bad rss-counter state mm:000000009e1f2b8d type:MM_FILEPAGES val:33 [ 36.121703] BUG: Bad rss-counter state mm:000000009e1f2b8d type:MM_ANONPAGES val:22 [ 36.282352] ================================================================== [ 36.283261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.284220] Read of size 8 at addr ffff8880145e05c8 by task sshd/222 [ 36.285004] [ 36.285226] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.286199] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.287202] Call Trace: [ 36.287523] [ 36.287810] dump_stack_lvl+0x91/0xf0 [ 36.288311] print_report+0xcc/0x620 [ 36.288806] ? __virt_addr_valid+0x102/0x340 [ 36.289350] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.289959] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.290589] kasan_report+0xbe/0xf0 [ 36.291061] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.291678] vma_interval_tree_remove+0xc75/0xec0 [ 36.292278] vma_prepare+0xc54/0x11a0 [ 36.292757] __split_vma+0x5af/0x950 [ 36.293221] ? __pfx___split_vma+0x10/0x10 [ 36.293740] ? find_held_lock+0x2c/0x110 [ 36.294271] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.294827] ? lock_is_held_type+0x9f/0x120 [ 36.295354] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.295965] ? mtree_range_walk+0x632/0x900 [ 36.296511] ? mas_walk+0x5c7/0x7c0 [ 36.296982] do_vmi_munmap+0x1f1/0x2b0 [ 36.297471] mmap_region+0x1f9/0x2660 [ 36.297950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.298471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.299175] ? __pfx_lock_acquire+0x10/0x10 [ 36.299704] ? __pfx_mmap_region+0x10/0x10 [ 36.300228] ? security_mmap_addr+0x7d/0xa0 [ 36.300756] ? get_unmapped_area+0x1f5/0x3f0 [ 36.301298] do_mmap+0x854/0xf00 [ 36.301742] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.302254] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.302820] ksys_mmap_pgoff+0x3af/0x500 [ 36.303319] do_syscall_64+0x3f/0x90 [ 36.303793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.304429] RIP: 0033:0x7f6a3c2a5d82 [ 36.304878] 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 [ 36.306986] RSP: 002b:00007ffc6dda0a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.307878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a3c2a5d82 [ 36.308716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a3b6df000 [ 36.309553] RBP: 00007f6a3b6df000 R08: 0000000000000009 R09: 0000000000001000 [ 36.310403] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556227515f70 [ 36.311244] R13: 00007ffc6dda0a30 R14: 00007ffc6dda0a60 R15: 00007ffc6dda0dc0 [ 36.312094] [ 36.312386] [ 36.312603] Allocated by task 213: [ 36.313026] kasan_save_stack+0x22/0x50 [ 36.313528] kasan_set_track+0x25/0x30 [ 36.314014] __kasan_slab_alloc+0x59/0x70 [ 36.314554] kmem_cache_alloc+0x16b/0x370 [ 36.315066] vm_area_dup+0x20/0x160 [ 36.315520] __split_vma+0x170/0x950 [ 36.315977] split_vma+0xc6/0x110 [ 36.316415] mprotect_fixup+0x8d2/0xb30 [ 36.316911] do_mprotect_pkey+0x87e/0xd40 [ 36.317427] __x64_sys_mprotect+0x78/0xc0 [ 36.317950] do_syscall_64+0x3f/0x90 [ 36.318428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.319063] [ 36.319281] Freed by task 213: [ 36.319674] kasan_save_stack+0x22/0x50 [ 36.320177] kasan_set_track+0x25/0x30 [ 36.320662] kasan_save_free_info+0x2b/0x50 [ 36.321193] __kasan_slab_free+0x10a/0x190 [ 36.321724] kmem_cache_free+0x10d/0x4d0 [ 36.322237] rcu_core+0x8c8/0x2860 [ 36.322682] __do_softirq+0x1b7/0x7d4 [ 36.323154] [ 36.323370] Last potentially related work creation: [ 36.323951] kasan_save_stack+0x22/0x50 [ 36.324454] __kasan_record_aux_stack+0x8e/0xa0 [ 36.325017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.325654] remove_vma+0x139/0x170 [ 36.326113] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.326669] do_vmi_munmap+0x1f1/0x2b0 [ 36.327151] __vm_munmap+0x138/0x3a0 [ 36.327622] __x64_sys_munmap+0x59/0x80 [ 36.328114] do_syscall_64+0x3f/0x90 [ 36.328581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.329216] [ 36.329428] The buggy address belongs to the object at ffff8880145e0570 [ 36.329428] which belongs to the cache vm_area_struct of size 168 [ 36.330918] The buggy address is located 88 bytes inside of [ 36.330918] freed 168-byte region [ffff8880145e0570, ffff8880145e0618) [ 36.332507] [ 36.332759] The buggy address belongs to the physical page: [ 36.333504] page:00000000cb104948 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145e0 [ 36.334746] memcg:ffff88800cba4a01 [ 36.335224] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.335951] page_type: 0xffffffff() [ 36.336468] raw: 0100000000000200 ffff88800879fc80 ffffea00003a2740 dead000000000002 [ 36.337506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cba4a01 [ 36.338543] page dumped because: kasan: bad access detected [ 36.339292] [ 36.339534] Memory state around the buggy address: [ 36.340195] ffff8880145e0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.341157] ffff8880145e0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 36.342122] >ffff8880145e0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.343050] ^ [ 36.343773] ffff8880145e0600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 36.344708] ffff8880145e0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.345621] ================================================================== [ 36.346849] Disabling lock debugging due to kernel taint [ 38.335596] BUG: Bad rss-counter state mm:0000000003b0e95e type:MM_FILEPAGES val:33 [ 38.336344] BUG: Bad rss-counter state mm:0000000003b0e95e type:MM_ANONPAGES val:22 [ 38.754176] BUG: Bad rss-counter state mm:0000000051a9f366 type:MM_FILEPAGES val:33 [ 38.754927] BUG: Bad rss-counter state mm:0000000051a9f366 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12355' (ECDSA) to the list of known hosts. 2023/06/19 16:33:40 fuzzer started 2023/06/19 16:33:40 dialing manager at localhost:44161 2023/06/19 16:33:40 checking machine... 2023/06/19 16:33:40 checking revisions... [ 39.399134] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:33:41 testing simple program... [ 39.445058] cgroup: Unknown subsys name 'net' [ 39.481568] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:33:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad6d0 RCX=ffff8880102b7410 RDX=1ffff11002056e79 RSI=ffff8880102b7408 RDI=ffffffff813ad6d0 RBP=ffffffff813ad6d0 RSP=ffff8880102b7320 R8 =0000000000000001 R9 =ffff8880102b73b0 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff888016aeb680 R15=0000000000002000 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007f56eda22900 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=00007f56edfd9618 CR3=000000000f546000 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=00007f492eddd8d0 CR3=000000000d780000 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=b13d8cc66fa351830b44e3cf30da677e XMM02=2c67c8bc2e329bc3000000000011c988 XMM03=fb795ef6d657705600000000001232d0 XMM04=39b73512200215b900000000000ae988 XMM05=59d5b690e0af863b0000000000133810 XMM06=00c3ffa147b8d8570000000000133698 XMM07=e042d86d42eb936e0000000000123550 XMM08=6d62e16bfcb5dad9000000000011c9e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000