syzkaller login: [ 30.613833] BUG: Bad rss-counter state mm:0000000097136998 type:MM_FILEPAGES val:33 [ 30.615501] BUG: Bad rss-counter state mm:0000000097136998 type:MM_ANONPAGES val:22 [ 30.782469] ================================================================== [ 30.783524] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.784618] Read of size 8 at addr ffff888016c90d08 by task sshd/220 [ 30.785698] [ 30.785979] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.787005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.788239] Call Trace: [ 30.788627] [ 30.788970] dump_stack_lvl+0x91/0xf0 [ 30.789544] print_report+0xcc/0x620 [ 30.790136] ? __virt_addr_valid+0x102/0x340 [ 30.790786] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791505] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792236] kasan_report+0xbe/0xf0 [ 30.792798] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.793525] vma_interval_tree_remove+0xc75/0xec0 [ 30.794245] vma_prepare+0xc54/0x11a0 [ 30.794807] __split_vma+0x5af/0x950 [ 30.795390] ? __pfx___split_vma+0x10/0x10 [ 30.796041] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 30.796816] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 30.797620] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.798332] ? lock_is_held_type+0x9f/0x120 [ 30.798929] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.799533] ? mtree_range_walk+0x632/0x900 [ 30.800085] ? mas_walk+0x5c7/0x7c0 [ 30.800563] do_vmi_munmap+0x1f1/0x2b0 [ 30.801057] mmap_region+0x1f9/0x2660 [ 30.801532] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.802056] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.802758] ? __pfx_lock_acquire+0x10/0x10 [ 30.803283] ? __pfx_mmap_region+0x10/0x10 [ 30.803808] ? security_mmap_addr+0x7d/0xa0 [ 30.804331] ? get_unmapped_area+0x1f5/0x3f0 [ 30.804878] do_mmap+0x854/0xf00 [ 30.805313] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.805830] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.806391] ksys_mmap_pgoff+0x3af/0x500 [ 30.806910] do_syscall_64+0x3f/0x90 [ 30.807396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808048] RIP: 0033:0x7f75f06e6d82 [ 30.808502] 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 [ 30.810625] RSP: 002b:00007ffc4ab34138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.811523] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75f06e6d82 [ 30.812376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f75efb20000 [ 30.813217] RBP: 00007f75efb20000 R08: 0000000000000009 R09: 0000000000001000 [ 30.814075] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ad774ff70 [ 30.814922] R13: 00007ffc4ab34150 R14: 00007ffc4ab34180 R15: 00007ffc4ab344e0 [ 30.815775] [ 30.816064] [ 30.816278] Allocated by task 213: [ 30.816705] kasan_save_stack+0x22/0x50 [ 30.817211] kasan_set_track+0x25/0x30 [ 30.817703] __kasan_slab_alloc+0x59/0x70 [ 30.818246] kmem_cache_alloc+0x16b/0x370 [ 30.818765] vm_area_dup+0x20/0x160 [ 30.819212] __split_vma+0x170/0x950 [ 30.819683] split_vma+0xc6/0x110 [ 30.820123] mprotect_fixup+0x8d2/0xb30 [ 30.820623] do_mprotect_pkey+0x87e/0xd40 [ 30.821148] __x64_sys_mprotect+0x78/0xc0 [ 30.821678] do_syscall_64+0x3f/0x90 [ 30.822164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822807] [ 30.823022] Freed by task 213: [ 30.823410] kasan_save_stack+0x22/0x50 [ 30.823912] kasan_set_track+0x25/0x30 [ 30.824403] kasan_save_free_info+0x2b/0x50 [ 30.824935] __kasan_slab_free+0x10a/0x190 [ 30.825469] kmem_cache_free+0x10d/0x4d0 [ 30.825985] rcu_core+0x8c8/0x2860 [ 30.826424] __do_softirq+0x1b7/0x7d4 [ 30.827018] [ 30.827240] Last potentially related work creation: [ 30.827857] kasan_save_stack+0x22/0x50 [ 30.828360] __kasan_record_aux_stack+0x8e/0xa0 [ 30.828949] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.829589] remove_vma+0x139/0x170 [ 30.830062] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.830627] do_vmi_munmap+0x1f1/0x2b0 [ 30.831112] __vm_munmap+0x138/0x3a0 [ 30.831579] __x64_sys_munmap+0x59/0x80 [ 30.832069] do_syscall_64+0x3f/0x90 [ 30.832544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833192] [ 30.833408] The buggy address belongs to the object at ffff888016c90cb0 [ 30.833408] which belongs to the cache vm_area_struct of size 168 [ 30.834912] The buggy address is located 88 bytes inside of [ 30.834912] freed 168-byte region [ffff888016c90cb0, ffff888016c90d58) [ 30.836327] [ 30.836544] The buggy address belongs to the physical page: [ 30.837209] page:000000009d67815e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c90 [ 30.838316] memcg:ffff88800e1d7e01 [ 30.838735] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.839377] page_type: 0xffffffff() [ 30.839839] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.840762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1d7e01 [ 30.841667] page dumped because: kasan: bad access detected [ 30.842328] [ 30.842545] Memory state around the buggy address: [ 30.843135] ffff888016c90c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.843981] ffff888016c90c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.844830] >ffff888016c90d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.845679] ^ [ 30.846121] ffff888016c90d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.846968] ffff888016c90e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.847816] ================================================================== [ 30.848735] Disabling lock debugging due to kernel taint [ 33.116411] BUG: Bad rss-counter state mm:00000000b96a6ff2 type:MM_FILEPAGES val:33 [ 33.117504] BUG: Bad rss-counter state mm:00000000b96a6ff2 type:MM_ANONPAGES val:22 [ 33.608744] BUG: Bad rss-counter state mm:00000000c579a31c type:MM_FILEPAGES val:33 [ 33.609831] BUG: Bad rss-counter state mm:00000000c579a31c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15876' (ECDSA) to the list of known hosts. 2023/06/20 20:43:05 fuzzer started 2023/06/20 20:43:05 dialing manager at localhost:36067 2023/06/20 20:43:05 checking machine... 2023/06/20 20:43:05 checking revisions... [ 34.373082] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:43:05 testing simple program... [ 34.423863] cgroup: Unknown subsys name 'net' [ 34.468850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:43:05 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff818c7443 RDX=0000000000008c74 RSI=0000000000008c74 RDI=ffffffff8650cbc0 RBP=ffff88801597f4b8 RSP=ffff88801597f3f0 R8 =0000000000000000 R9 =ffff88801597f4a0 R10=0000000000038001 R11=000000000002402e R12=ffff88801597f4c0 R13=ffff88801597f4a8 R14=ffff88801597f4a1 R15=ffff88801597f460 RIP=ffffffff811307c2 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 00007f6739109900 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=00007f67385144f0 CR3=0000000009d32000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=feb556c380c9f1e100000000000ae988 XMM05=2e21dc53cf0d0de700000000001334b0 XMM06=19e9129bd510f2350000000000132348 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f6aaabe60b0 CR3=000000000cf36000 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=2035303a33343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000