syzkaller login: [ 31.745966] BUG: Bad rss-counter state mm:0000000001c412ce type:MM_FILEPAGES val:33 [ 31.747377] BUG: Bad rss-counter state mm:0000000001c412ce type:MM_ANONPAGES val:22 [ 31.787330] ================================================================== [ 31.788288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.789318] Read of size 8 at addr ffff88800e309df0 by task sshd/221 [ 31.790300] [ 31.790530] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.791421] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.792436] Call Trace: [ 31.792775] [ 31.793073] dump_stack_lvl+0x91/0xf0 [ 31.793587] print_report+0xcc/0x620 [ 31.794136] ? __virt_addr_valid+0x102/0x340 [ 31.794710] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.795353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.796004] kasan_report+0xbe/0xf0 [ 31.796503] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.797146] vma_interval_tree_remove+0xc75/0xec0 [ 31.797759] vma_prepare+0xc54/0x11a0 [ 31.798270] __split_vma+0x5af/0x950 [ 31.798759] ? __pfx___split_vma+0x10/0x10 [ 31.799300] ? find_held_lock+0x2c/0x110 [ 31.799838] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.800422] ? lock_is_held_type+0x9f/0x120 [ 31.800986] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.801613] ? mtree_range_walk+0x632/0x900 [ 31.802209] ? mas_walk+0x5c7/0x7c0 [ 31.802696] do_vmi_munmap+0x1f1/0x2b0 [ 31.803202] mmap_region+0x1f9/0x2660 [ 31.803705] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.804230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.804964] ? __pfx_lock_acquire+0x10/0x10 [ 31.805504] ? __pfx_mmap_region+0x10/0x10 [ 31.806054] ? security_mmap_addr+0x7d/0xa0 [ 31.806603] ? get_unmapped_area+0x1f5/0x3f0 [ 31.807167] do_mmap+0x854/0xf00 [ 31.807623] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.808131] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.808715] ksys_mmap_pgoff+0x3af/0x500 [ 31.809243] do_syscall_64+0x3f/0x90 [ 31.809740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.810421] RIP: 0033:0x7f9fad6fdd82 [ 31.810893] 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 [ 31.813109] RSP: 002b:00007fffb11d4b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.814167] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fad6fdd82 [ 31.815056] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9facb37000 [ 31.815917] RBP: 00007f9facb37000 R08: 0000000000000009 R09: 0000000000001000 [ 31.816799] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bb7f43f60 [ 31.817670] R13: 00007fffb11d4b30 R14: 00007fffb11d4b60 R15: 00007fffb11d4ec0 [ 31.818553] [ 31.818848] [ 31.819071] Allocated by task 213: [ 31.819499] kasan_save_stack+0x22/0x50 [ 31.820004] kasan_set_track+0x25/0x30 [ 31.820505] __kasan_slab_alloc+0x59/0x70 [ 31.821041] kmem_cache_alloc+0x16b/0x370 [ 31.821566] vm_area_dup+0x20/0x160 [ 31.822037] __split_vma+0x170/0x950 [ 31.822507] split_vma+0xc6/0x110 [ 31.822952] mprotect_fixup+0x8d2/0xb30 [ 31.823463] do_mprotect_pkey+0x87e/0xd40 [ 31.823996] __x64_sys_mprotect+0x78/0xc0 [ 31.824533] do_syscall_64+0x3f/0x90 [ 31.825009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.825664] [ 31.825879] Freed by task 213: [ 31.826293] kasan_save_stack+0x22/0x50 [ 31.826806] kasan_set_track+0x25/0x30 [ 31.827311] kasan_save_free_info+0x2b/0x50 [ 31.827849] __kasan_slab_free+0x10a/0x190 [ 31.828394] kmem_cache_free+0x10d/0x4d0 [ 31.828912] rcu_core+0x8c8/0x2860 [ 31.829388] __do_softirq+0x1b7/0x7d4 [ 31.829869] [ 31.830097] Last potentially related work creation: [ 31.830679] kasan_save_stack+0x22/0x50 [ 31.831188] __kasan_record_aux_stack+0x8e/0xa0 [ 31.831764] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.832424] remove_vma+0x139/0x170 [ 31.832891] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.833454] do_vmi_munmap+0x1f1/0x2b0 [ 31.833945] __vm_munmap+0x138/0x3a0 [ 31.834433] __x64_sys_munmap+0x59/0x80 [ 31.834940] do_syscall_64+0x3f/0x90 [ 31.835414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.836056] [ 31.836270] Second to last potentially related work creation: [ 31.836955] kasan_save_stack+0x22/0x50 [ 31.837468] __kasan_record_aux_stack+0x8e/0xa0 [ 31.838055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.838705] remove_vma+0x139/0x170 [ 31.839161] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.839721] do_vmi_munmap+0x1f1/0x2b0 [ 31.840215] mmap_region+0x1f9/0x2660 [ 31.840694] do_mmap+0x854/0xf00 [ 31.841129] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.841618] ksys_mmap_pgoff+0x3af/0x500 [ 31.842244] do_syscall_64+0x3f/0x90 [ 31.842834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.843625] [ 31.843890] The buggy address belongs to the object at ffff88800e309d98 [ 31.843890] which belongs to the cache vm_area_struct of size 168 [ 31.845789] The buggy address is located 88 bytes inside of [ 31.845789] freed 168-byte region [ffff88800e309d98, ffff88800e309e40) [ 31.847682] [ 31.847941] The buggy address belongs to the physical page: [ 31.848740] page:000000006896df11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe309 [ 31.850073] memcg:ffff88800e332a01 [ 31.850592] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.851434] page_type: 0xffffffff() [ 31.851981] raw: 0100000000000200 ffff88800879fc80 ffffea000025b9c0 dead000000000005 [ 31.853098] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e332a01 [ 31.854224] page dumped because: kasan: bad access detected [ 31.855025] [ 31.855281] Memory state around the buggy address: [ 31.855989] ffff88800e309c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.857019] ffff88800e309d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.858063] >ffff88800e309d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.859091] ^ [ 31.860073] ffff88800e309e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.861115] ffff88800e309e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.862142] ================================================================== [ 31.863645] Disabling lock debugging due to kernel taint [ 33.764563] BUG: Bad rss-counter state mm:00000000c723553b type:MM_FILEPAGES val:33 [ 33.766154] BUG: Bad rss-counter state mm:00000000c723553b type:MM_ANONPAGES val:22 [ 34.277554] BUG: Bad rss-counter state mm:00000000318a7863 type:MM_FILEPAGES val:33 [ 34.278836] BUG: Bad rss-counter state mm:00000000318a7863 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2272' (ECDSA) to the list of known hosts. 2023/06/19 13:22:07 fuzzer started 2023/06/19 13:22:08 dialing manager at localhost:44161 2023/06/19 13:22:08 checking machine... 2023/06/19 13:22:08 checking revisions... [ 34.993174] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:22:08 testing simple program... [ 35.033685] cgroup: Unknown subsys name 'net' [ 35.073759] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:22:06 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff888017cd9b40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff888017cd9f34 RBP=ffff888017cd9b40 RSP=ffff88800ab07508 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888017cd9b40 R13=0000000000000000 R14=ffffffff85652a88 R15=0000000000000000 RIP=ffffffff8137455a RFL=00000202 [-------] 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 00007fa8a8d5e900 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=00007fa8a9315618 CR3=000000001b86e000 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=ffff888008c58400 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=00007fb0be4e46e0 CR3=000000000d644000 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=c98bffaced0738890a41a9472d9b0e03 XMM02=0000000000121c98eff9b2d0a8fce9cb XMM03=0000000000121d682c67c8bc2e329bc3 XMM04=ca5349fce617da0900000000000ae988 XMM05=e4cb8bb95a7664b60000000000136508 XMM06=c291bd5c70af25b90000000000136390 XMM07=e042d86d42eb936e0000000000125820 XMM08=ed384befcc8ba9150000000000121d68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000