syzkaller login: [ 31.976609] BUG: Bad rss-counter state mm:0000000081e57c77 type:MM_FILEPAGES val:33 [ 31.977751] BUG: Bad rss-counter state mm:0000000081e57c77 type:MM_ANONPAGES val:22 [ 32.025579] ================================================================== [ 32.027076] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.028470] Read of size 8 at addr ffff888016ed9058 by task sshd/219 [ 32.029525] [ 32.029860] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.031063] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.032379] Call Trace: [ 32.032801] [ 32.033095] dump_stack_lvl+0x91/0xf0 [ 32.033681] print_report+0xcc/0x620 [ 32.034247] ? __virt_addr_valid+0x102/0x340 [ 32.034898] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.035596] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.036352] kasan_report+0xbe/0xf0 [ 32.036945] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.037591] vma_interval_tree_remove+0xc75/0xec0 [ 32.038348] vma_prepare+0xc54/0x11a0 [ 32.038840] __split_vma+0x5af/0x950 [ 32.039325] ? __pfx___split_vma+0x10/0x10 [ 32.039883] ? find_held_lock+0x2c/0x110 [ 32.040424] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.041007] ? lock_is_held_type+0x9f/0x120 [ 32.041564] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.042194] ? mtree_range_walk+0x632/0x900 [ 32.042757] ? mas_walk+0x5c7/0x7c0 [ 32.043238] do_vmi_munmap+0x1f1/0x2b0 [ 32.043762] mmap_region+0x1f9/0x2660 [ 32.044261] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.044784] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.045513] ? __pfx_lock_acquire+0x10/0x10 [ 32.046058] ? __pfx_mmap_region+0x10/0x10 [ 32.046598] ? security_mmap_addr+0x7d/0xa0 [ 32.047136] ? get_unmapped_area+0x1f5/0x3f0 [ 32.047708] do_mmap+0x854/0xf00 [ 32.048164] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.048687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.049273] ksys_mmap_pgoff+0x3af/0x500 [ 32.049806] do_syscall_64+0x3f/0x90 [ 32.050326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.051012] RIP: 0033:0x7f2ccfcc3d82 [ 32.051499] 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 [ 32.053800] RSP: 002b:00007ffd6b051418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.054751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2ccfcc3d82 [ 32.055666] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ccf0fd000 [ 32.056561] RBP: 00007f2ccf0fd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.057445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055914a003b20 [ 32.058338] R13: 00007ffd6b051430 R14: 00007ffd6b051460 R15: 00007ffd6b0517c0 [ 32.059246] [ 32.059546] [ 32.059797] Allocated by task 212: [ 32.060248] kasan_save_stack+0x22/0x50 [ 32.060786] kasan_set_track+0x25/0x30 [ 32.061313] __kasan_slab_alloc+0x59/0x70 [ 32.061868] kmem_cache_alloc+0x16b/0x370 [ 32.062412] vm_area_dup+0x20/0x160 [ 32.062895] __split_vma+0x170/0x950 [ 32.063395] split_vma+0xc6/0x110 [ 32.063866] mprotect_fixup+0x8d2/0xb30 [ 32.064394] do_mprotect_pkey+0x87e/0xd40 [ 32.064941] __x64_sys_mprotect+0x78/0xc0 [ 32.065500] do_syscall_64+0x3f/0x90 [ 32.066000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.066677] [ 32.066901] Freed by task 212: [ 32.067315] kasan_save_stack+0x22/0x50 [ 32.067858] kasan_set_track+0x25/0x30 [ 32.068379] kasan_save_free_info+0x2b/0x50 [ 32.068944] __kasan_slab_free+0x10a/0x190 [ 32.069506] kmem_cache_free+0x10d/0x4d0 [ 32.070038] rcu_core+0x8c8/0x2860 [ 32.070560] __do_softirq+0x1b7/0x7d4 [ 32.071058] [ 32.071284] Last potentially related work creation: [ 32.071919] kasan_save_stack+0x22/0x50 [ 32.072447] __kasan_record_aux_stack+0x8e/0xa0 [ 32.073041] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.073713] remove_vma+0x139/0x170 [ 32.074186] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.074779] do_vmi_munmap+0x1f1/0x2b0 [ 32.075285] __vm_munmap+0x138/0x3a0 [ 32.075796] __x64_sys_munmap+0x59/0x80 [ 32.076320] do_syscall_64+0x3f/0x90 [ 32.076815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.077485] [ 32.077707] The buggy address belongs to the object at ffff888016ed9000 [ 32.077707] which belongs to the cache vm_area_struct of size 168 [ 32.079273] The buggy address is located 88 bytes inside of [ 32.079273] freed 168-byte region [ffff888016ed9000, ffff888016ed90a8) [ 32.080754] [ 32.080970] The buggy address belongs to the physical page: [ 32.081646] page:0000000005e088e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ed9 [ 32.082752] memcg:ffff88800c6bd201 [ 32.083186] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.083857] page_type: 0xffffffff() [ 32.084309] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.085242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6bd201 [ 32.086158] page dumped because: kasan: bad access detected [ 32.086837] [ 32.087053] Memory state around the buggy address: [ 32.087641] ffff888016ed8f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 32.088520] ffff888016ed8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.089383] >ffff888016ed9000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.090245] ^ [ 32.090984] ffff888016ed9080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.091854] ffff888016ed9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.092710] ================================================================== [ 32.093650] Disabling lock debugging due to kernel taint [ 34.917316] BUG: Bad rss-counter state mm:0000000085329ae4 type:MM_FILEPAGES val:33 [ 34.918442] BUG: Bad rss-counter state mm:0000000085329ae4 type:MM_ANONPAGES val:22 [ 35.354952] BUG: Bad rss-counter state mm:00000000c71acf2c type:MM_FILEPAGES val:33 [ 35.356342] BUG: Bad rss-counter state mm:00000000c71acf2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31860' (ECDSA) to the list of known hosts. 2023/06/20 01:36:04 fuzzer started 2023/06/20 01:36:04 dialing manager at localhost:44161 2023/06/20 01:36:04 checking machine... 2023/06/20 01:36:04 checking revisions... [ 36.166096] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:36:04 testing simple program... [ 36.212099] cgroup: Unknown subsys name 'net' [ 36.254406] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:36:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e94f558 RCX=ffffffff860d6801 RDX=1ffff11001d29ead RSI=ffffffff81846014 RDI=ffff88800e94f568 RBP=ffff88800e94f528 RSP=ffff88800e94f470 R8 =ffffffff860d68fa R9 =ffff88800e94f4d0 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800e94f558 R13=0000000000000000 R14=ffff8880159cd1c0 R15=ffff888018ea15f0 RIP=ffffffff813ad446 RFL=00000282 [--S----] 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 00007f320431b900 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=000055d68cdd9954 CR3=0000000009a3c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000101f5 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff888009a481a0 RSP=ffff88800a1ff7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f5 R11=0000000000000128 R12=00000000000101f5 R13=ffff888009a48050 R14=ffff888009a48048 R15=ffff888009a48060 RIP=ffffffff821927de RFL=00000093 [--S-A-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 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=00007f1c3268de60 CR3=000000000d8ca000 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=9951b9a72f33bda9c340d5fa58d96b16 XMM02=000000000011dba8eff9b2d0a8fce9cb XMM03=000000000011dc782c67c8bc2e329bc3 XMM04=1d68ed79150348b400000000000ae988 XMM05=dfcdbad4f1609c3700000000001344c0 XMM06=2de2023c5c04167e0000000000133328 XMM07=e042d86d42eb936e0000000000124c40 XMM08=9123cd3d19aa14db000000000011dc78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000