syzkaller login: [ 31.635901] BUG: Bad rss-counter state mm:000000007d1017fb type:MM_FILEPAGES val:33 [ 31.637110] BUG: Bad rss-counter state mm:000000007d1017fb type:MM_ANONPAGES val:22 [ 31.675437] ================================================================== [ 31.676355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.677310] Read of size 8 at addr ffff8880166f7310 by task sshd/219 [ 31.678086] [ 31.678329] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.679195] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.680175] Call Trace: [ 31.680502] [ 31.680788] dump_stack_lvl+0x91/0xf0 [ 31.681292] print_report+0xcc/0x620 [ 31.681775] ? __virt_addr_valid+0x102/0x340 [ 31.682345] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.682959] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.683583] kasan_report+0xbe/0xf0 [ 31.684076] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.684697] vma_interval_tree_remove+0xc75/0xec0 [ 31.685303] vma_prepare+0xc54/0x11a0 [ 31.685784] __split_vma+0x5af/0x950 [ 31.686278] ? __pfx___split_vma+0x10/0x10 [ 31.686803] ? find_held_lock+0x2c/0x110 [ 31.687323] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.687885] ? lock_is_held_type+0x9f/0x120 [ 31.688422] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.689025] ? mtree_range_walk+0x632/0x900 [ 31.689575] ? mas_walk+0x5c7/0x7c0 [ 31.690052] do_vmi_munmap+0x1f1/0x2b0 [ 31.690562] mmap_region+0x1f9/0x2660 [ 31.691046] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.691555] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.692271] ? __pfx_lock_acquire+0x10/0x10 [ 31.692812] ? __pfx_mmap_region+0x10/0x10 [ 31.693354] ? security_mmap_addr+0x7d/0xa0 [ 31.693892] ? get_unmapped_area+0x1f5/0x3f0 [ 31.694453] do_mmap+0x854/0xf00 [ 31.694891] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.695383] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.695947] ksys_mmap_pgoff+0x3af/0x500 [ 31.696452] do_syscall_64+0x3f/0x90 [ 31.696935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.697586] RIP: 0033:0x7fd9cf631d82 [ 31.698059] 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 [ 31.700217] RSP: 002b:00007ffcdae54758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.701125] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9cf631d82 [ 31.701987] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9cea6b000 [ 31.702847] RBP: 00007fd9cea6b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.703896] R10: 0000000000000812 R11: 0000000000000206 R12: 000055936a72ab20 [ 31.704762] R13: 00007ffcdae54770 R14: 00007ffcdae547a0 R15: 00007ffcdae54b00 [ 31.705621] [ 31.705921] [ 31.706156] Allocated by task 212: [ 31.706585] kasan_save_stack+0x22/0x50 [ 31.707090] kasan_set_track+0x25/0x30 [ 31.707584] __kasan_slab_alloc+0x59/0x70 [ 31.708112] kmem_cache_alloc+0x16b/0x370 [ 31.708633] vm_area_dup+0x20/0x160 [ 31.709089] __split_vma+0x170/0x950 [ 31.709560] split_vma+0xc6/0x110 [ 31.710011] mprotect_fixup+0x8d2/0xb30 [ 31.710522] do_mprotect_pkey+0x87e/0xd40 [ 31.711054] __x64_sys_mprotect+0x78/0xc0 [ 31.711580] do_syscall_64+0x3f/0x90 [ 31.712061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.712715] [ 31.712940] Freed by task 212: [ 31.713340] kasan_save_stack+0x22/0x50 [ 31.713844] kasan_set_track+0x25/0x30 [ 31.714374] kasan_save_free_info+0x2b/0x50 [ 31.714923] __kasan_slab_free+0x10a/0x190 [ 31.715466] kmem_cache_free+0x10d/0x4d0 [ 31.715972] rcu_core+0x8c8/0x2860 [ 31.716423] __do_softirq+0x1b7/0x7d4 [ 31.716903] [ 31.717120] Last potentially related work creation: [ 31.717702] kasan_save_stack+0x22/0x50 [ 31.718262] __kasan_record_aux_stack+0x8e/0xa0 [ 31.718838] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.719490] remove_vma+0x139/0x170 [ 31.719951] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.720526] do_vmi_munmap+0x1f1/0x2b0 [ 31.721021] __vm_munmap+0x138/0x3a0 [ 31.721490] __x64_sys_munmap+0x59/0x80 [ 31.721991] do_syscall_64+0x3f/0x90 [ 31.722474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.723124] [ 31.723341] The buggy address belongs to the object at ffff8880166f72b8 [ 31.723341] which belongs to the cache vm_area_struct of size 168 [ 31.724826] The buggy address is located 88 bytes inside of [ 31.724826] freed 168-byte region [ffff8880166f72b8, ffff8880166f7360) [ 31.726238] [ 31.726454] The buggy address belongs to the physical page: [ 31.727118] page:0000000038105598 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166f7 [ 31.728220] memcg:ffff88801685bc01 [ 31.728649] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.729294] page_type: 0xffffffff() [ 31.729749] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.730689] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801685bc01 [ 31.731597] page dumped because: kasan: bad access detected [ 31.732269] [ 31.732486] Memory state around the buggy address: [ 31.733075] ffff8880166f7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.733950] ffff8880166f7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.734818] >ffff8880166f7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.735682] ^ [ 31.736157] ffff8880166f7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.737025] ffff8880166f7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.737872] ================================================================== [ 31.739307] Disabling lock debugging due to kernel taint [ 33.549906] BUG: Bad rss-counter state mm:000000007c288ccc type:MM_FILEPAGES val:33 [ 33.551158] BUG: Bad rss-counter state mm:000000007c288ccc type:MM_ANONPAGES val:22 [ 34.090839] BUG: Bad rss-counter state mm:0000000095e9b9b1 type:MM_FILEPAGES val:33 [ 34.092073] BUG: Bad rss-counter state mm:0000000095e9b9b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48749' (ECDSA) to the list of known hosts. 2023/06/20 04:01:18 fuzzer started 2023/06/20 04:01:18 dialing manager at localhost:44161 2023/06/20 04:01:18 checking machine... 2023/06/20 04:01:18 checking revisions... [ 34.737590] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:01:18 testing simple program... [ 34.775876] cgroup: Unknown subsys name 'net' [ 34.816139] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:01:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015b9b680 RSI=ffffffff83ab4207 RDI=ffffffff87f9468c RBP=0000000000000000 RSP=ffff88801698f500 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=000009b5000009b5 R12=0000000000000000 R13=0000000000000033 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c081b 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 00007fadccbe4900 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=00007fadcd19b618 CR3=0000000018110000 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=00007fc3259834b0 CR3=0000000016faa000 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=2037313a31303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a31303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000