syzkaller login: [ 32.497706] BUG: Bad rss-counter state mm:000000006edf9727 type:MM_FILEPAGES val:33 [ 32.498893] BUG: Bad rss-counter state mm:000000006edf9727 type:MM_ANONPAGES val:22 [ 32.651983] ================================================================== [ 32.652962] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.653850] Read of size 8 at addr ffff888016ac9140 by task sshd/221 [ 32.654700] [ 32.654909] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.655753] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.656695] Call Trace: [ 32.656994] [ 32.657265] dump_stack_lvl+0x91/0xf0 [ 32.657727] print_report+0xcc/0x620 [ 32.658186] ? __virt_addr_valid+0x102/0x340 [ 32.658711] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.659288] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.659883] kasan_report+0xbe/0xf0 [ 32.660336] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.660923] vma_interval_tree_remove+0xc75/0xec0 [ 32.661502] vma_prepare+0xc54/0x11a0 [ 32.661959] __split_vma+0x5af/0x950 [ 32.662408] ? __pfx___split_vma+0x10/0x10 [ 32.662905] ? find_held_lock+0x2c/0x110 [ 32.663419] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.663992] ? lock_is_held_type+0x9f/0x120 [ 32.664520] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.665118] ? mtree_range_walk+0x632/0x900 [ 32.665665] ? mas_walk+0x5c7/0x7c0 [ 32.666126] do_vmi_munmap+0x1f1/0x2b0 [ 32.666613] mmap_region+0x1f9/0x2660 [ 32.667080] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.667591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.668297] ? __pfx_lock_acquire+0x10/0x10 [ 32.668826] ? __pfx_mmap_region+0x10/0x10 [ 32.669346] ? security_mmap_addr+0x7d/0xa0 [ 32.669865] ? get_unmapped_area+0x1f5/0x3f0 [ 32.670406] do_mmap+0x854/0xf00 [ 32.670833] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.671316] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.671882] ksys_mmap_pgoff+0x3af/0x500 [ 32.672384] do_syscall_64+0x3f/0x90 [ 32.672853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.673492] RIP: 0033:0x7ff271ee3d82 [ 32.673943] 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 [ 32.676057] RSP: 002b:00007ffc958a8f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.676954] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff271ee3d82 [ 32.677797] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff27131d000 [ 32.678643] RBP: 00007ff27131d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.679480] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561bcdeb4ec0 [ 32.680318] R13: 00007ffc958a8f60 R14: 00007ffc958a8f90 R15: 00007ffc958a92f0 [ 32.681153] [ 32.681444] [ 32.681657] Allocated by task 214: [ 32.682083] kasan_save_stack+0x22/0x50 [ 32.682585] kasan_set_track+0x25/0x30 [ 32.683062] __kasan_slab_alloc+0x59/0x70 [ 32.683576] kmem_cache_alloc+0x16b/0x370 [ 32.684080] vm_area_dup+0x20/0x160 [ 32.684529] __split_vma+0x170/0x950 [ 32.684983] split_vma+0xc6/0x110 [ 32.685417] mprotect_fixup+0x8d2/0xb30 [ 32.685912] do_mprotect_pkey+0x87e/0xd40 [ 32.686435] __x64_sys_mprotect+0x78/0xc0 [ 32.686944] do_syscall_64+0x3f/0x90 [ 32.687417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.688066] [ 32.688284] Freed by task 214: [ 32.688675] kasan_save_stack+0x22/0x50 [ 32.689171] kasan_set_track+0x25/0x30 [ 32.689657] kasan_save_free_info+0x2b/0x50 [ 32.690174] __kasan_slab_free+0x10a/0x190 [ 32.690707] kmem_cache_free+0x10d/0x4d0 [ 32.691193] rcu_core+0x8c8/0x2860 [ 32.691636] __do_softirq+0x1b7/0x7d4 [ 32.692097] [ 32.692314] Last potentially related work creation: [ 32.692901] kasan_save_stack+0x22/0x50 [ 32.693400] __kasan_record_aux_stack+0x8e/0xa0 [ 32.693968] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.694609] remove_vma+0x139/0x170 [ 32.695048] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.695607] do_vmi_munmap+0x1f1/0x2b0 [ 32.696088] __vm_munmap+0x138/0x3a0 [ 32.696554] __x64_sys_munmap+0x59/0x80 [ 32.697046] do_syscall_64+0x3f/0x90 [ 32.697516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.698133] [ 32.698347] The buggy address belongs to the object at ffff888016ac90e8 [ 32.698347] which belongs to the cache vm_area_struct of size 168 [ 32.699810] The buggy address is located 88 bytes inside of [ 32.699810] freed 168-byte region [ffff888016ac90e8, ffff888016ac9190) [ 32.701197] [ 32.701409] The buggy address belongs to the physical page: [ 32.702061] page:00000000fe88223f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ac9 [ 32.703143] memcg:ffff88800f63ef01 [ 32.703581] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.704189] page_type: 0xffffffff() [ 32.704619] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.705493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f63ef01 [ 32.706349] page dumped because: kasan: bad access detected [ 32.706970] [ 32.707183] Memory state around the buggy address: [ 32.707755] ffff888016ac9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.708560] ffff888016ac9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.709429] >ffff888016ac9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.710416] ^ [ 32.711113] ffff888016ac9180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.712044] ffff888016ac9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.712933] ================================================================== [ 32.713950] Disabling lock debugging due to kernel taint [ 35.531048] BUG: Bad rss-counter state mm:000000001ddcf3b0 type:MM_FILEPAGES val:33 [ 35.532276] BUG: Bad rss-counter state mm:000000001ddcf3b0 type:MM_ANONPAGES val:22 [ 36.010704] BUG: Bad rss-counter state mm:00000000ae199863 type:MM_FILEPAGES val:33 [ 36.011929] BUG: Bad rss-counter state mm:00000000ae199863 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20263' (ECDSA) to the list of known hosts. 2023/06/19 23:10:09 fuzzer started 2023/06/19 23:10:10 dialing manager at localhost:44161 2023/06/19 23:10:10 checking machine... 2023/06/19 23:10:10 checking revisions... [ 36.714047] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:10:10 testing simple program... [ 36.758968] cgroup: Unknown subsys name 'net' [ 36.799102] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:08 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=00007fb6b9568840 CR3=000000000c7d6000 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=36c39e60d2c6ff88964b4e811fb0bd3a XMM02=000000000011cbe0ec2efd57dc4c00df XMM03=000000000012415881a5e11f4d603c34 XMM04=decf6fc277fd232f00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133d58 XMM06=c291bd5c70af25b90000000000133be0 XMM07=e042d86d42eb936e00000000001243d8 XMM08=81a5e11f4d603c34000000000011cc40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f0657c91618 CR3=000000000dc58000 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=2039303a30313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a30313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000