syzkaller login: [ 35.832077] BUG: Bad rss-counter state mm:00000000b984a2d8 type:MM_FILEPAGES val:33 [ 35.833493] BUG: Bad rss-counter state mm:00000000b984a2d8 type:MM_ANONPAGES val:22 [ 35.977864] ================================================================== [ 35.978941] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.980195] Read of size 8 at addr ffff8880166d6a50 by task sshd/219 [ 35.981109] [ 35.981371] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.982523] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.983837] Call Trace: [ 35.984272] [ 35.984646] dump_stack_lvl+0x91/0xf0 [ 35.985324] print_report+0xcc/0x620 [ 35.985966] ? __virt_addr_valid+0x102/0x340 [ 35.986689] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.987515] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.988319] kasan_report+0xbe/0xf0 [ 35.988974] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.989811] vma_interval_tree_remove+0xc75/0xec0 [ 35.990627] vma_prepare+0xc54/0x11a0 [ 35.991289] __split_vma+0x5af/0x950 [ 35.991929] ? __pfx___split_vma+0x10/0x10 [ 35.992649] ? find_held_lock+0x2c/0x110 [ 35.993381] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.994148] ? lock_is_held_type+0x9f/0x120 [ 35.994875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.995698] ? mtree_range_walk+0x632/0x900 [ 35.996440] ? mas_walk+0x5c7/0x7c0 [ 35.997115] do_vmi_munmap+0x1f1/0x2b0 [ 35.997532] mmap_region+0x1f9/0x2660 [ 35.997887] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.998269] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.998789] ? __pfx_lock_acquire+0x10/0x10 [ 35.999179] ? __pfx_mmap_region+0x10/0x10 [ 35.999572] ? security_mmap_addr+0x7d/0xa0 [ 35.999963] ? get_unmapped_area+0x1f5/0x3f0 [ 36.000370] do_mmap+0x854/0xf00 [ 36.000696] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.001072] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.001485] ksys_mmap_pgoff+0x3af/0x500 [ 36.001861] do_syscall_64+0x3f/0x90 [ 36.002212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.002697] RIP: 0033:0x7f524dbe0d82 [ 36.003037] 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 [ 36.004588] RSP: 002b:00007ffc361082a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.005263] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f524dbe0d82 [ 36.005878] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f524d01a000 [ 36.006498] RBP: 00007f524d01a000 R08: 0000000000000009 R09: 0000000000001000 [ 36.007117] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cfb5afbf70 [ 36.007732] R13: 00007ffc361082c0 R14: 00007ffc361082f0 R15: 00007ffc36108650 [ 36.008357] [ 36.008575] [ 36.008739] Allocated by task 212: [ 36.009069] kasan_save_stack+0x22/0x50 [ 36.009441] kasan_set_track+0x25/0x30 [ 36.009802] __kasan_slab_alloc+0x59/0x70 [ 36.010186] kmem_cache_alloc+0x16b/0x370 [ 36.010567] vm_area_dup+0x20/0x160 [ 36.010900] __split_vma+0x170/0x950 [ 36.011245] split_vma+0xc6/0x110 [ 36.011568] mprotect_fixup+0x8d2/0xb30 [ 36.011944] do_mprotect_pkey+0x87e/0xd40 [ 36.012330] __x64_sys_mprotect+0x78/0xc0 [ 36.012713] do_syscall_64+0x3f/0x90 [ 36.013071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.013545] [ 36.013704] Freed by task 19: [ 36.013988] kasan_save_stack+0x22/0x50 [ 36.014362] kasan_set_track+0x25/0x30 [ 36.014725] kasan_save_free_info+0x2b/0x50 [ 36.015116] __kasan_slab_free+0x10a/0x190 [ 36.015518] kmem_cache_free+0x10d/0x4d0 [ 36.015892] rcu_core+0x8c8/0x2860 [ 36.016219] __do_softirq+0x1b7/0x7d4 [ 36.016575] [ 36.016737] Last potentially related work creation: [ 36.017191] kasan_save_stack+0x22/0x50 [ 36.017567] __kasan_record_aux_stack+0x8e/0xa0 [ 36.017984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.018458] remove_vma+0x139/0x170 [ 36.018789] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.019248] do_vmi_munmap+0x1f1/0x2b0 [ 36.019636] __vm_munmap+0x138/0x3a0 [ 36.019980] __x64_sys_munmap+0x59/0x80 [ 36.020352] do_syscall_64+0x3f/0x90 [ 36.020698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.021180] [ 36.021340] The buggy address belongs to the object at ffff8880166d69f8 [ 36.021340] which belongs to the cache vm_area_struct of size 168 [ 36.022441] The buggy address is located 88 bytes inside of [ 36.022441] freed 168-byte region [ffff8880166d69f8, ffff8880166d6aa0) [ 36.023466] [ 36.023628] The buggy address belongs to the physical page: [ 36.024128] page:000000000cab6aff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166d6 [ 36.025011] memcg:ffff88800dc52d01 [ 36.025339] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.025809] page_type: 0xffffffff() [ 36.026142] raw: 0100000000000200 ffff88800879fc80 ffffea000025e740 dead000000000006 [ 36.026818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc52d01 [ 36.027482] page dumped because: kasan: bad access detected [ 36.027965] [ 36.028128] Memory state around the buggy address: [ 36.028555] ffff8880166d6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.029190] ffff8880166d6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.029821] >ffff8880166d6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.030441] ^ [ 36.030951] ffff8880166d6a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.031573] ffff8880166d6b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.032196] ================================================================== [ 36.032880] Disabling lock debugging due to kernel taint [ 38.525342] BUG: Bad rss-counter state mm:00000000c601bb2d type:MM_FILEPAGES val:33 [ 38.526483] BUG: Bad rss-counter state mm:00000000c601bb2d type:MM_ANONPAGES val:22 [ 39.027016] BUG: Bad rss-counter state mm:000000006a9b4969 type:MM_FILEPAGES val:33 [ 39.028099] BUG: Bad rss-counter state mm:000000006a9b4969 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40348' (ECDSA) to the list of known hosts. 2023/06/19 17:10:31 fuzzer started 2023/06/19 17:10:32 dialing manager at localhost:44161 2023/06/19 17:10:32 checking machine... 2023/06/19 17:10:32 checking revisions... [ 39.772762] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:10:32 testing simple program... [ 39.824377] cgroup: Unknown subsys name 'net' [ 39.864475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:10:26 Registers: info registers vcpu 0 RAX=0000000000020d8a RBX=0000000000000001 RCX=ffffffff8180c584 RDX=0000000000020d9b RSI=00000000000080c5 RDI=ffffffff8613756e RBP=ffff88800f0074d0 RSP=ffff88800f007408 R8 =ffffffff86137508 R9 =ffff88800f0074b8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88800f0074d8 R13=ffff88800f0074c0 R14=ffff88800f0074b9 R15=ffff88800f007478 RIP=ffffffff81130868 RFL=00000283 [--S---C] 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 00007f58860c3700 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=00007fbb42b200b0 CR3=000000000dd48000 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=2031333a30313a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a30313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b4f3d RBX=0000000000000001 RCX=ffffffff864b4f38 RDX=0000000000000000 RSI=0000000000000005 RDI=ffffffff8605061c RBP=ffff888008e579b0 RSP=ffff888008e578e8 R8 =ffffffff864b4f38 R9 =ffff888008e57998 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008e579b8 R13=ffff888008e579a0 R14=ffff888008e57999 R15=ffff888008e57958 RIP=ffffffff81130a6e 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 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=00007fd81b496250 CR3=00000000139c2000 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=639833decbc3dbb1814e2cc1991091d8 XMM02=000000000011fd68ec2efd57dc4c00df XMM03=0000000000124430c366d10da9c6e455 XMM04=5702b544fdd0dc1000000000000ae988 XMM05=dfcdbad4f1609c370000000000133f30 XMM06=acf4d4a5aef8ec840000000000132d98 XMM07=e042d86d42eb936e00000000001246b0 XMM08=c366d10da9c6e455000000000011fdc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000