syzkaller login: [ 39.851854] BUG: Bad rss-counter state mm:000000009e8b5b32 type:MM_FILEPAGES val:33 [ 39.852792] BUG: Bad rss-counter state mm:000000009e8b5b32 type:MM_ANONPAGES val:22 [ 39.971319] ================================================================== [ 39.971979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.972662] Read of size 8 at addr ffff88800ee2d798 by task sshd/220 [ 39.973207] [ 39.973362] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.973989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.974726] Call Trace: [ 39.974952] [ 39.975153] dump_stack_lvl+0x91/0xf0 [ 39.975554] print_report+0xcc/0x620 [ 39.975988] ? __virt_addr_valid+0x102/0x340 [ 39.976376] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.976803] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.977238] kasan_report+0xbe/0xf0 [ 39.977624] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.978067] vma_interval_tree_remove+0xc75/0xec0 [ 39.978535] vma_prepare+0xc54/0x11a0 [ 39.978889] __split_vma+0x5af/0x950 [ 39.979225] ? __pfx___split_vma+0x10/0x10 [ 39.979651] ? find_held_lock+0x2c/0x110 [ 39.980028] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.980438] ? lock_is_held_type+0x9f/0x120 [ 39.980835] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.981272] ? mtree_range_walk+0x632/0x900 [ 39.981690] ? mas_walk+0x5c7/0x7c0 [ 39.982020] do_vmi_munmap+0x1f1/0x2b0 [ 39.982371] mmap_region+0x1f9/0x2660 [ 39.982759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.983132] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.983642] ? __pfx_lock_acquire+0x10/0x10 [ 39.984031] ? __pfx_mmap_region+0x10/0x10 [ 39.984399] ? security_mmap_addr+0x7d/0xa0 [ 39.984778] ? get_unmapped_area+0x1f5/0x3f0 [ 39.985167] do_mmap+0x854/0xf00 [ 39.985493] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.985850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.986257] ksys_mmap_pgoff+0x3af/0x500 [ 39.986651] do_syscall_64+0x3f/0x90 [ 39.986990] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.987453] RIP: 0033:0x7fcb5de4cd82 [ 39.987780] 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 [ 39.989311] RSP: 002b:00007ffdba7ef9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.989958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb5de4cd82 [ 39.990597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb5d286000 [ 39.991194] RBP: 00007fcb5d286000 R08: 0000000000000009 R09: 0000000000001000 [ 39.991844] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c16536980 [ 39.992475] R13: 00007ffdba7ef9f0 R14: 00007ffdba7efa20 R15: 00007ffdba7efd80 [ 39.993078] [ 39.993286] [ 39.993458] Allocated by task 213: [ 39.993784] kasan_save_stack+0x22/0x50 [ 39.994153] kasan_set_track+0x25/0x30 [ 39.994544] __kasan_slab_alloc+0x59/0x70 [ 39.994922] kmem_cache_alloc+0x16b/0x370 [ 39.995284] vm_area_dup+0x20/0x160 [ 39.995649] __split_vma+0x170/0x950 [ 39.995985] split_vma+0xc6/0x110 [ 39.996294] mprotect_fixup+0x8d2/0xb30 [ 39.996652] do_mprotect_pkey+0x87e/0xd40 [ 39.997022] __x64_sys_mprotect+0x78/0xc0 [ 39.997394] do_syscall_64+0x3f/0x90 [ 39.997729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.998173] [ 39.998326] Freed by task 213: [ 39.998620] kasan_save_stack+0x22/0x50 [ 39.998974] kasan_set_track+0x25/0x30 [ 39.999326] kasan_save_free_info+0x2b/0x50 [ 39.999699] __kasan_slab_free+0x10a/0x190 [ 40.000074] kmem_cache_free+0x10d/0x4d0 [ 40.000465] rcu_core+0x8c8/0x2860 [ 40.000815] __do_softirq+0x1b7/0x7d4 [ 40.001151] [ 40.001305] Last potentially related work creation: [ 40.001733] kasan_save_stack+0x22/0x50 [ 40.002087] __kasan_record_aux_stack+0x8e/0xa0 [ 40.002530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.003018] remove_vma+0x139/0x170 [ 40.003336] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.003732] do_vmi_munmap+0x1f1/0x2b0 [ 40.004067] __vm_munmap+0x138/0x3a0 [ 40.004410] __x64_sys_munmap+0x59/0x80 [ 40.004765] do_syscall_64+0x3f/0x90 [ 40.005098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.005594] [ 40.005753] The buggy address belongs to the object at ffff88800ee2d740 [ 40.005753] which belongs to the cache vm_area_struct of size 168 [ 40.006828] The buggy address is located 88 bytes inside of [ 40.006828] freed 168-byte region [ffff88800ee2d740, ffff88800ee2d7e8) [ 40.007849] [ 40.007999] The buggy address belongs to the physical page: [ 40.008472] page:000000001d7c86bf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee2d [ 40.009265] memcg:ffff88800f2a6901 [ 40.009606] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.010078] page_type: 0xffffffff() [ 40.010400] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.011069] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2a6901 [ 40.011749] page dumped because: kasan: bad access detected [ 40.012225] [ 40.012383] Memory state around the buggy address: [ 40.012807] ffff88800ee2d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.013417] ffff88800ee2d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.014031] >ffff88800ee2d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.014665] ^ [ 40.015023] ffff88800ee2d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.015636] ffff88800ee2d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.016229] ================================================================== [ 40.017005] Disabling lock debugging due to kernel taint [ 41.966142] BUG: Bad rss-counter state mm:0000000006dc4eef type:MM_FILEPAGES val:33 [ 41.966911] BUG: Bad rss-counter state mm:0000000006dc4eef type:MM_ANONPAGES val:22 [ 42.322064] BUG: Bad rss-counter state mm:000000008212e8a4 type:MM_FILEPAGES val:33 [ 42.323474] BUG: Bad rss-counter state mm:000000008212e8a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21242' (ECDSA) to the list of known hosts. 2023/06/20 09:06:03 fuzzer started 2023/06/20 09:06:03 dialing manager at localhost:44161 2023/06/20 09:06:03 checking machine... 2023/06/20 09:06:03 checking revisions... [ 42.891998] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:06:03 testing simple program... [ 42.928936] cgroup: Unknown subsys name 'net' [ 42.969385] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:05:54 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000010 RCX=0000000000000000 RDX=ffff888018c41b40 RSI=ffffffff8449f040 RDI=0000000000000006 RBP=ffff888018d4a608 RSP=ffff88800f1efce0 R8 =0000000000000006 R9 =00007f20a7ea2618 R10=00007f20a7cb0fff R11=0000000000000000 R12=0000000000000001 R13=0000000000000002 R14=00007f20a7ea2618 R15=00007f20a7cb0fff RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f20a78eb900 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=00007f20a7ea2618 CR3=0000000019c4c000 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=0000000000000001 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=00007f6faf02fde0 CR3=000000000fec8000 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=2033303a36303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a36303a3930203032 XMM08=65747379733a755f6d65747379733d6a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000