syzkaller login: [ 30.310161] BUG: Bad rss-counter state mm:000000000288cf2d type:MM_FILEPAGES val:33 [ 30.311646] BUG: Bad rss-counter state mm:000000000288cf2d type:MM_ANONPAGES val:22 [ 30.490336] ================================================================== [ 30.491463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.492694] Read of size 8 at addr ffff88800df4f058 by task sshd/219 [ 30.493491] [ 30.493709] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.494668] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.495694] Call Trace: [ 30.496016] [ 30.496299] dump_stack_lvl+0x91/0xf0 [ 30.496811] print_report+0xcc/0x620 [ 30.497305] ? __virt_addr_valid+0x102/0x340 [ 30.497858] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.498483] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.499156] kasan_report+0xbe/0xf0 [ 30.499630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.500251] vma_interval_tree_remove+0xc75/0xec0 [ 30.500859] vma_prepare+0xc54/0x11a0 [ 30.501348] __split_vma+0x5af/0x950 [ 30.501813] ? __pfx___split_vma+0x10/0x10 [ 30.502341] ? find_held_lock+0x2c/0x110 [ 30.502857] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.503462] ? lock_is_held_type+0x9f/0x120 [ 30.503998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.504619] ? mtree_range_walk+0x632/0x900 [ 30.505179] ? mas_walk+0x5c7/0x7c0 [ 30.505648] do_vmi_munmap+0x1f1/0x2b0 [ 30.506141] mmap_region+0x1f9/0x2660 [ 30.506628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.507188] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.507900] ? __pfx_lock_acquire+0x10/0x10 [ 30.508440] ? __pfx_mmap_region+0x10/0x10 [ 30.508994] ? security_mmap_addr+0x7d/0xa0 [ 30.509517] ? get_unmapped_area+0x1f5/0x3f0 [ 30.510056] do_mmap+0x854/0xf00 [ 30.510491] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.511002] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.511587] ksys_mmap_pgoff+0x3af/0x500 [ 30.512100] do_syscall_64+0x3f/0x90 [ 30.512595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.513238] RIP: 0033:0x7f100d38dd82 [ 30.513698] 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 [ 30.515850] RSP: 002b:00007ffcc9fac168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.516775] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f100d38dd82 [ 30.517626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f100c7c7000 [ 30.518468] RBP: 00007f100c7c7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.519352] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2fe162ec0 [ 30.520225] R13: 00007ffcc9fac180 R14: 00007ffcc9fac1b0 R15: 00007ffcc9fac510 [ 30.521098] [ 30.521389] [ 30.521602] Allocated by task 212: [ 30.522032] kasan_save_stack+0x22/0x50 [ 30.522533] kasan_set_track+0x25/0x30 [ 30.523025] __kasan_slab_alloc+0x59/0x70 [ 30.523542] kmem_cache_alloc+0x16b/0x370 [ 30.524107] vm_area_dup+0x20/0x160 [ 30.524583] __split_vma+0x170/0x950 [ 30.525061] split_vma+0xc6/0x110 [ 30.525506] mprotect_fixup+0x8d2/0xb30 [ 30.526084] do_mprotect_pkey+0x87e/0xd40 [ 30.526731] __x64_sys_mprotect+0x78/0xc0 [ 30.527362] do_syscall_64+0x3f/0x90 [ 30.527937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.528608] [ 30.528819] Freed by task 212: [ 30.529191] kasan_save_stack+0x22/0x50 [ 30.529672] kasan_set_track+0x25/0x30 [ 30.530141] kasan_save_free_info+0x2b/0x50 [ 30.530653] __kasan_slab_free+0x10a/0x190 [ 30.531156] kmem_cache_free+0x10d/0x4d0 [ 30.531636] rcu_core+0x8c8/0x2860 [ 30.532098] __do_softirq+0x1b7/0x7d4 [ 30.532576] [ 30.532788] Last potentially related work creation: [ 30.533376] kasan_save_stack+0x22/0x50 [ 30.533916] __kasan_record_aux_stack+0x8e/0xa0 [ 30.534461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.535079] remove_vma+0x139/0x170 [ 30.535505] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.536030] do_vmi_munmap+0x1f1/0x2b0 [ 30.536490] __vm_munmap+0x138/0x3a0 [ 30.536960] __x64_sys_munmap+0x59/0x80 [ 30.537465] do_syscall_64+0x3f/0x90 [ 30.537914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.538558] [ 30.538768] Second to last potentially related work creation: [ 30.539469] kasan_save_stack+0x22/0x50 [ 30.539973] __kasan_record_aux_stack+0x8e/0xa0 [ 30.540556] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.541252] remove_vma+0x139/0x170 [ 30.541708] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.542263] do_vmi_munmap+0x1f1/0x2b0 [ 30.542748] mmap_region+0x1f9/0x2660 [ 30.543229] do_mmap+0x854/0xf00 [ 30.543658] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.544140] ksys_mmap_pgoff+0x3af/0x500 [ 30.544670] do_syscall_64+0x3f/0x90 [ 30.545190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.545832] [ 30.546049] The buggy address belongs to the object at ffff88800df4f000 [ 30.546049] which belongs to the cache vm_area_struct of size 168 [ 30.547480] The buggy address is located 88 bytes inside of [ 30.547480] freed 168-byte region [ffff88800df4f000, ffff88800df4f0a8) [ 30.548905] [ 30.549154] The buggy address belongs to the physical page: [ 30.549824] page:0000000029ce36a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf4f [ 30.550943] memcg:ffff8880094bca01 [ 30.551367] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.552010] page_type: 0xffffffff() [ 30.552465] raw: 0100000000000200 ffff8880087a0c80 ffffea000060c780 dead000000000002 [ 30.553391] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094bca01 [ 30.554348] page dumped because: kasan: bad access detected [ 30.555018] [ 30.555233] Memory state around the buggy address: [ 30.555815] ffff88800df4ef00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.556721] ffff88800df4ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.557590] >ffff88800df4f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.558493] ^ [ 30.559219] ffff88800df4f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.560081] ffff88800df4f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.560938] ================================================================== [ 30.561968] Disabling lock debugging due to kernel taint [ 33.426725] BUG: Bad rss-counter state mm:00000000b7fc523f type:MM_FILEPAGES val:33 [ 33.427879] BUG: Bad rss-counter state mm:00000000b7fc523f type:MM_ANONPAGES val:22 [ 33.873341] BUG: Bad rss-counter state mm:00000000ffa1d58d type:MM_FILEPAGES val:33 [ 33.874402] BUG: Bad rss-counter state mm:00000000ffa1d58d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7330' (ECDSA) to the list of known hosts. 2023/06/20 20:11:37 fuzzer started 2023/06/20 20:11:37 dialing manager at localhost:36067 2023/06/20 20:11:37 checking machine... 2023/06/20 20:11:37 checking revisions... [ 34.602843] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:11:38 testing simple program... [ 34.647553] cgroup: Unknown subsys name 'net' [ 34.705341] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:11:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016b1fb40 RCX=0000000000000000 RDX=1ffff11001317b40 RSI=ffffffff844a8943 RDI=0000000000000005 RBP=ffff888016b1fe70 RSP=ffff888016b1f820 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=ffff88800e33c658 R12=ffff8880098bda00 R13=ffff8880098bd800 R14=0000000000000002 R15=ffff888016b1fb80 RIP=ffffffff844a897c 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 00007f02055c0900 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=00007f020558f008 CR3=00000000169ce000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100188144e RBX=0000000000000000 RCX=ffffffff8364da69 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800c40a274 RBP=ffff88800c40a274 RSP=ffff8880147af850 R8 =0000000000000000 R9 =ffffed100188144e R10=ffff88800c40a277 R11=0000000000000001 R12=0000000000000000 R13=ffff88800c40a000 R14=ffff8880147afa70 R15=dffffc0000000000 RIP=ffffffff8364da75 RFL=00000217 [----APC] 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 00007f69926b3900 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=00007f020542f000 CR3=000000000c5b6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8ed3c1c50367bc5500000000000ae988 XMM05=1319e678c5640f8a0000000000134ae8 XMM06=e8008b1642ea3e600000000000134a50 XMM07=58f17c1affdc82d60000000000124570 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000