syzkaller login: [ 39.622543] BUG: Bad rss-counter state mm:0000000075aa419e type:MM_FILEPAGES val:33 [ 39.623568] BUG: Bad rss-counter state mm:0000000075aa419e type:MM_ANONPAGES val:22 [ 39.798262] ================================================================== [ 39.799201] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.800132] Read of size 8 at addr ffff88800ded7c20 by task sshd/219 [ 39.801107] [ 39.801333] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.802237] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.803257] Call Trace: [ 39.803584] [ 39.803870] dump_stack_lvl+0x91/0xf0 [ 39.804364] print_report+0xcc/0x620 [ 39.804848] ? __virt_addr_valid+0x102/0x340 [ 39.805401] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.806028] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.806653] kasan_report+0xbe/0xf0 [ 39.807128] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.807765] vma_interval_tree_remove+0xc75/0xec0 [ 39.808376] vma_prepare+0xc54/0x11a0 [ 39.808863] __split_vma+0x5af/0x950 [ 39.809361] ? __pfx___split_vma+0x10/0x10 [ 39.809915] ? find_held_lock+0x2c/0x110 [ 39.810456] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.811028] ? lock_is_held_type+0x9f/0x120 [ 39.811577] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.812194] ? mtree_range_walk+0x632/0x900 [ 39.812747] ? mas_walk+0x5c7/0x7c0 [ 39.813217] do_vmi_munmap+0x1f1/0x2b0 [ 39.813710] mmap_region+0x1f9/0x2660 [ 39.814215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.814729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.815447] ? __pfx_lock_acquire+0x10/0x10 [ 39.815989] ? __pfx_mmap_region+0x10/0x10 [ 39.816512] ? security_mmap_addr+0x7d/0xa0 [ 39.817049] ? get_unmapped_area+0x1f5/0x3f0 [ 39.817596] do_mmap+0x854/0xf00 [ 39.818050] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.818545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.819107] ksys_mmap_pgoff+0x3af/0x500 [ 39.819630] do_syscall_64+0x3f/0x90 [ 39.820114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.820770] RIP: 0033:0x7f1f52324d82 [ 39.821228] 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 [ 39.823491] RSP: 002b:00007fff605b5ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.824410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f52324d82 [ 39.825287] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f5175e000 [ 39.826156] RBP: 00007f1f5175e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.827022] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce7f675ec0 [ 39.827895] R13: 00007fff605b5ad0 R14: 00007fff605b5b00 R15: 00007fff605b5e60 [ 39.828768] [ 39.829063] [ 39.829284] Allocated by task 211: [ 39.829725] kasan_save_stack+0x22/0x50 [ 39.830274] kasan_set_track+0x25/0x30 [ 39.830775] __kasan_slab_alloc+0x59/0x70 [ 39.831303] kmem_cache_alloc+0x16b/0x370 [ 39.831836] vm_area_dup+0x20/0x160 [ 39.832308] __split_vma+0x170/0x950 [ 39.832780] split_vma+0xc6/0x110 [ 39.833221] mprotect_fixup+0x8d2/0xb30 [ 39.833737] do_mprotect_pkey+0x87e/0xd40 [ 39.834273] __x64_sys_mprotect+0x78/0xc0 [ 39.834813] do_syscall_64+0x3f/0x90 [ 39.835289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.835944] [ 39.836162] Freed by task 211: [ 39.836557] kasan_save_stack+0x22/0x50 [ 39.837073] kasan_set_track+0x25/0x30 [ 39.837567] kasan_save_free_info+0x2b/0x50 [ 39.838139] __kasan_slab_free+0x10a/0x190 [ 39.838688] kmem_cache_free+0x10d/0x4d0 [ 39.839198] rcu_core+0x8c8/0x2860 [ 39.839653] __do_softirq+0x1b7/0x7d4 [ 39.840144] [ 39.840361] Last potentially related work creation: [ 39.840952] kasan_save_stack+0x22/0x50 [ 39.841452] __kasan_record_aux_stack+0x8e/0xa0 [ 39.842076] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.842734] remove_vma+0x139/0x170 [ 39.843186] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.843745] do_vmi_munmap+0x1f1/0x2b0 [ 39.844233] __vm_munmap+0x138/0x3a0 [ 39.844697] __x64_sys_munmap+0x59/0x80 [ 39.845192] do_syscall_64+0x3f/0x90 [ 39.845668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.846343] [ 39.846566] The buggy address belongs to the object at ffff88800ded7bc8 [ 39.846566] which belongs to the cache vm_area_struct of size 168 [ 39.848062] The buggy address is located 88 bytes inside of [ 39.848062] freed 168-byte region [ffff88800ded7bc8, ffff88800ded7c70) [ 39.849473] [ 39.849689] The buggy address belongs to the physical page: [ 39.850378] page:0000000028c2d766 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xded7 [ 39.851468] memcg:ffff88800b87e001 [ 39.851894] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.852608] page_type: 0xffffffff() [ 39.853058] raw: 0100000000000200 ffff88800879fc80 ffffea000031a280 dead000000000005 [ 39.853998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b87e001 [ 39.854927] page dumped because: kasan: bad access detected [ 39.855622] [ 39.855846] Memory state around the buggy address: [ 39.856432] ffff88800ded7b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.857306] ffff88800ded7b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.858197] >ffff88800ded7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.859069] ^ [ 39.859600] ffff88800ded7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.860461] ffff88800ded7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.861310] ================================================================== [ 39.862338] Disabling lock debugging due to kernel taint [ 42.161106] BUG: Bad rss-counter state mm:00000000eb1610a1 type:MM_FILEPAGES val:33 [ 42.162044] BUG: Bad rss-counter state mm:00000000eb1610a1 type:MM_ANONPAGES val:22 [ 42.655720] BUG: Bad rss-counter state mm:00000000c0143a2b type:MM_FILEPAGES val:33 [ 42.656706] BUG: Bad rss-counter state mm:00000000c0143a2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50449' (ECDSA) to the list of known hosts. 2023/06/19 11:49:25 fuzzer started 2023/06/19 11:49:25 dialing manager at localhost:44161 2023/06/19 11:49:25 checking machine... 2023/06/19 11:49:25 checking revisions... [ 43.382415] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:49:25 testing simple program... [ 43.427700] cgroup: Unknown subsys name 'net' [ 43.481801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:49:24 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=00007f95c4230600 CR3=0000000015e2c000 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=2035323a39343a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a39343a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000001a1f9067 RCX=ffffffff8170b313 RDX=ffff88800ffe8000 RSI=0000000000000000 RDI=0000000000000007 RBP=fff0000000000f98 RSP=ffff888016797798 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f80ffffffff R13=00007f80e98fd000 R14=00007f80e98fcfff R15=dffffc0000000000 RIP=ffffffff8170c95d 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 00007f80e992a900 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=00007f80e9909020 CR3=000000000e3d8000 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=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