syzkaller login: [ 47.880209] BUG: Bad rss-counter state mm:000000009c32bbb0 type:MM_FILEPAGES val:33 [ 47.881810] BUG: Bad rss-counter state mm:000000009c32bbb0 type:MM_ANONPAGES val:22 [ 48.034254] ================================================================== [ 48.035229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.036215] Read of size 8 at addr ffff88800ee91310 by task sshd/219 [ 48.037175] [ 48.037404] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.038359] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.039388] Call Trace: [ 48.039744] [ 48.040037] dump_stack_lvl+0x91/0xf0 [ 48.040553] print_report+0xcc/0x620 [ 48.041053] ? __virt_addr_valid+0x102/0x340 [ 48.041671] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.042339] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.042993] kasan_report+0xbe/0xf0 [ 48.043470] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.044092] vma_interval_tree_remove+0xc75/0xec0 [ 48.044719] vma_prepare+0xc54/0x11a0 [ 48.045196] __split_vma+0x5af/0x950 [ 48.045704] ? __pfx___split_vma+0x10/0x10 [ 48.046232] ? find_held_lock+0x2c/0x110 [ 48.046756] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.047313] ? lock_is_held_type+0x9f/0x120 [ 48.047865] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.048475] ? mtree_range_walk+0x632/0x900 [ 48.049037] ? mas_walk+0x5c7/0x7c0 [ 48.049523] do_vmi_munmap+0x1f1/0x2b0 [ 48.050035] mmap_region+0x1f9/0x2660 [ 48.050523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.051051] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.051782] ? __pfx_lock_acquire+0x10/0x10 [ 48.052316] ? __pfx_mmap_region+0x10/0x10 [ 48.052856] ? security_mmap_addr+0x7d/0xa0 [ 48.053385] ? get_unmapped_area+0x1f5/0x3f0 [ 48.053956] do_mmap+0x854/0xf00 [ 48.054399] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.054914] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.055476] ksys_mmap_pgoff+0x3af/0x500 [ 48.055988] do_syscall_64+0x3f/0x90 [ 48.056465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.057125] RIP: 0033:0x7fc578d13d82 [ 48.057617] 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 [ 48.059773] RSP: 002b:00007fff748efa78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.060690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc578d13d82 [ 48.061578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc57814d000 [ 48.062427] RBP: 00007fc57814d000 R08: 0000000000000009 R09: 0000000000001000 [ 48.063455] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a83e407ec0 [ 48.064567] R13: 00007fff748efa90 R14: 00007fff748efac0 R15: 00007fff748efe20 [ 48.065703] [ 48.066043] [ 48.066260] Allocated by task 212: [ 48.066705] kasan_save_stack+0x22/0x50 [ 48.067214] kasan_set_track+0x25/0x30 [ 48.067718] __kasan_slab_alloc+0x59/0x70 [ 48.068243] kmem_cache_alloc+0x16b/0x370 [ 48.068784] vm_area_dup+0x20/0x160 [ 48.069233] __split_vma+0x170/0x950 [ 48.069731] split_vma+0xc6/0x110 [ 48.070172] mprotect_fixup+0x8d2/0xb30 [ 48.070686] do_mprotect_pkey+0x87e/0xd40 [ 48.071218] __x64_sys_mprotect+0x78/0xc0 [ 48.071760] do_syscall_64+0x3f/0x90 [ 48.072234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.072883] [ 48.073096] Freed by task 212: [ 48.073509] kasan_save_stack+0x22/0x50 [ 48.074055] kasan_set_track+0x25/0x30 [ 48.074568] kasan_save_free_info+0x2b/0x50 [ 48.075112] __kasan_slab_free+0x10a/0x190 [ 48.075693] kmem_cache_free+0x10d/0x4d0 [ 48.076236] rcu_core+0x8c8/0x2860 [ 48.076699] __do_softirq+0x1b7/0x7d4 [ 48.077177] [ 48.077390] Last potentially related work creation: [ 48.078058] kasan_save_stack+0x22/0x50 [ 48.078581] __kasan_record_aux_stack+0x8e/0xa0 [ 48.079155] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.079804] remove_vma+0x139/0x170 [ 48.080254] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.080828] do_vmi_munmap+0x1f1/0x2b0 [ 48.081314] __vm_munmap+0x138/0x3a0 [ 48.081818] __x64_sys_munmap+0x59/0x80 [ 48.082316] do_syscall_64+0x3f/0x90 [ 48.082804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.083443] [ 48.083667] Second to last potentially related work creation: [ 48.084350] kasan_save_stack+0x22/0x50 [ 48.084866] __kasan_record_aux_stack+0x8e/0xa0 [ 48.085441] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.086126] remove_vma+0x139/0x170 [ 48.086604] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.087188] do_vmi_munmap+0x1f1/0x2b0 [ 48.087694] mmap_region+0x1f9/0x2660 [ 48.088171] do_mmap+0x854/0xf00 [ 48.088610] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.089101] ksys_mmap_pgoff+0x3af/0x500 [ 48.089632] do_syscall_64+0x3f/0x90 [ 48.090104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.090760] [ 48.090977] The buggy address belongs to the object at ffff88800ee912b8 [ 48.090977] which belongs to the cache vm_area_struct of size 168 [ 48.092443] The buggy address is located 88 bytes inside of [ 48.092443] freed 168-byte region [ffff88800ee912b8, ffff88800ee91360) [ 48.093886] [ 48.094104] The buggy address belongs to the physical page: [ 48.094787] page:0000000084033c31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee91 [ 48.095878] memcg:ffff88800e9d5901 [ 48.096306] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.096961] page_type: 0xffffffff() [ 48.097421] raw: 0100000000000200 ffff88800879fc80 ffffea0000399e00 dead000000000004 [ 48.098361] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9d5901 [ 48.099279] page dumped because: kasan: bad access detected [ 48.099966] [ 48.100181] Memory state around the buggy address: [ 48.100771] ffff88800ee91200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 48.101655] ffff88800ee91280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 48.102499] >ffff88800ee91300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 48.103353] ^ [ 48.103842] ffff88800ee91380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 48.104707] ffff88800ee91400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 48.105575] ================================================================== [ 48.106520] Disabling lock debugging due to kernel taint [ 50.471152] BUG: Bad rss-counter state mm:000000003eb69159 type:MM_FILEPAGES val:33 [ 50.472332] BUG: Bad rss-counter state mm:000000003eb69159 type:MM_ANONPAGES val:22 [ 50.880523] BUG: Bad rss-counter state mm:000000005248bb87 type:MM_FILEPAGES val:33 [ 50.881427] BUG: Bad rss-counter state mm:000000005248bb87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48321' (ECDSA) to the list of known hosts. 2023/06/20 05:40:05 fuzzer started 2023/06/20 05:40:05 dialing manager at localhost:44161 2023/06/20 05:40:05 checking machine... 2023/06/20 05:40:05 checking revisions... [ 51.583559] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:40:05 testing simple program... [ 51.639070] cgroup: Unknown subsys name 'net' [ 51.677245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:39:56 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff888015a77a3a RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000003 RDI=0000000000000000 RBP=0000000000000003 RSP=ffff888015a77950 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffffc R11=0000000000000000 R12=0000000000000001 R13=ffff88800cb48780 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c0384 RFL=00000246 [---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 00007ff04f3b8700 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=00007f41675d00b0 CR3=000000000e3ca000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fb1721eff70 CR3=000000000c574000 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=a6efb011c9389991e5490bf001b0992f XMM02=ec2efd57dc4c00df000000000011d958 XMM03=354644d966b34a15000000000011da28 XMM04=85ad77ee1896ce6700000000000ae988 XMM05=7dcea622e20d286800000000001365f0 XMM06=4fda316b135da52b0000000000135c88 XMM07=e042d86d42eb936e0000000000124a48 XMM08=354644d966b34a15000000000011da28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000