syzkaller login: [ 38.853251] BUG: Bad rss-counter state mm:00000000dab09821 type:MM_FILEPAGES val:33 [ 38.854508] BUG: Bad rss-counter state mm:00000000dab09821 type:MM_ANONPAGES val:22 [ 39.010749] ================================================================== [ 39.011865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.013028] Read of size 8 at addr ffff88800fdf7798 by task sshd/221 [ 39.014009] [ 39.014266] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.015319] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.016472] Call Trace: [ 39.016847] [ 39.017184] dump_stack_lvl+0x91/0xf0 [ 39.017762] print_report+0xcc/0x620 [ 39.018331] ? __virt_addr_valid+0x102/0x340 [ 39.018990] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.019769] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.020439] kasan_report+0xbe/0xf0 [ 39.020949] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.021615] vma_interval_tree_remove+0xc75/0xec0 [ 39.022272] vma_prepare+0xc54/0x11a0 [ 39.022784] __split_vma+0x5af/0x950 [ 39.023296] ? __pfx___split_vma+0x10/0x10 [ 39.023855] ? find_held_lock+0x2c/0x110 [ 39.024408] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.025006] ? lock_is_held_type+0x9f/0x120 [ 39.025579] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.026225] ? mtree_range_walk+0x632/0x900 [ 39.026816] ? mas_walk+0x5c7/0x7c0 [ 39.027329] do_vmi_munmap+0x1f1/0x2b0 [ 39.027854] mmap_region+0x1f9/0x2660 [ 39.028368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.028913] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.029673] ? __pfx_lock_acquire+0x10/0x10 [ 39.030240] ? __pfx_mmap_region+0x10/0x10 [ 39.030804] ? security_mmap_addr+0x7d/0xa0 [ 39.031391] ? get_unmapped_area+0x1f5/0x3f0 [ 39.031987] do_mmap+0x854/0xf00 [ 39.032455] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.032980] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.033588] ksys_mmap_pgoff+0x3af/0x500 [ 39.034131] do_syscall_64+0x3f/0x90 [ 39.034637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.035332] RIP: 0033:0x7fad2b572d82 [ 39.035821] 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 [ 39.038081] RSP: 002b:00007fff2408d158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.039045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad2b572d82 [ 39.039966] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad2a9ac000 [ 39.040863] RBP: 00007fad2a9ac000 R08: 0000000000000009 R09: 0000000000001000 [ 39.041755] R10: 0000000000000812 R11: 0000000000000206 R12: 000055becf543ec0 [ 39.042655] R13: 00007fff2408d170 R14: 00007fff2408d1a0 R15: 00007fff2408d500 [ 39.043582] [ 39.043893] [ 39.044120] Allocated by task 214: [ 39.044576] kasan_save_stack+0x22/0x50 [ 39.045116] kasan_set_track+0x25/0x30 [ 39.045646] __kasan_slab_alloc+0x59/0x70 [ 39.046205] kmem_cache_alloc+0x16b/0x370 [ 39.046754] vm_area_dup+0x20/0x160 [ 39.047249] __split_vma+0x170/0x950 [ 39.047753] split_vma+0xc6/0x110 [ 39.048231] mprotect_fixup+0x8d2/0xb30 [ 39.048768] do_mprotect_pkey+0x87e/0xd40 [ 39.049318] __x64_sys_mprotect+0x78/0xc0 [ 39.049868] do_syscall_64+0x3f/0x90 [ 39.050367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.051055] [ 39.051309] Freed by task 214: [ 39.051736] kasan_save_stack+0x22/0x50 [ 39.052300] kasan_set_track+0x25/0x30 [ 39.052852] kasan_save_free_info+0x2b/0x50 [ 39.053441] __kasan_slab_free+0x10a/0x190 [ 39.054031] kmem_cache_free+0x10d/0x4d0 [ 39.054692] rcu_core+0x8c8/0x2860 [ 39.055199] __do_softirq+0x1b7/0x7d4 [ 39.055725] [ 39.055962] Last potentially related work creation: [ 39.056613] kasan_save_stack+0x22/0x50 [ 39.057174] __kasan_record_aux_stack+0x8e/0xa0 [ 39.057811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.058520] remove_vma+0x139/0x170 [ 39.059022] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.059649] do_vmi_munmap+0x1f1/0x2b0 [ 39.060191] __vm_munmap+0x138/0x3a0 [ 39.060710] __x64_sys_munmap+0x59/0x80 [ 39.061264] do_syscall_64+0x3f/0x90 [ 39.061789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.062500] [ 39.062737] The buggy address belongs to the object at ffff88800fdf7740 [ 39.062737] which belongs to the cache vm_area_struct of size 168 [ 39.064396] The buggy address is located 88 bytes inside of [ 39.064396] freed 168-byte region [ffff88800fdf7740, ffff88800fdf77e8) [ 39.065965] [ 39.066203] The buggy address belongs to the physical page: [ 39.066933] page:00000000b5f2abe8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdf7 [ 39.068147] memcg:ffff88800f264e01 [ 39.068623] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.069340] page_type: 0xffffffff() [ 39.069845] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.070872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f264e01 [ 39.071885] page dumped because: kasan: bad access detected [ 39.072624] [ 39.072865] Memory state around the buggy address: [ 39.073509] ffff88800fdf7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.074472] ffff88800fdf7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.075434] >ffff88800fdf7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.076382] ^ [ 39.076930] ffff88800fdf7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.077881] ffff88800fdf7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.078825] ================================================================== [ 39.080028] Disabling lock debugging due to kernel taint [ 40.344970] BUG: Bad rss-counter state mm:00000000fef05b0e type:MM_FILEPAGES val:33 [ 40.345712] BUG: Bad rss-counter state mm:00000000fef05b0e type:MM_ANONPAGES val:22 [ 40.789319] BUG: Bad rss-counter state mm:000000005f95640a type:MM_FILEPAGES val:33 [ 40.790670] BUG: Bad rss-counter state mm:000000005f95640a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4323' (ECDSA) to the list of known hosts. 2023/06/20 05:13:50 fuzzer started 2023/06/20 05:13:50 dialing manager at localhost:44161 2023/06/20 05:13:50 checking machine... 2023/06/20 05:13:50 checking revisions... [ 41.455376] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:13:50 testing simple program... [ 41.500820] cgroup: Unknown subsys name 'net' [ 41.568401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:13:39 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800f347f58 RSP=ffff88800f347f18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800f347f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812d130c RFL=00000006 [-----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 00007f2390a69900 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=00007f2391020618 CR3=000000000d988000 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=00007fa5880083d0 RBX=0000000000000000 RCX=0000000000000280 RDX=0000000000000114 RSI=0000000000021000 RDI=0000000000000036 RBP=0000000000000280 RSP=00007fa58fb415e0 R8 =0000000000000000 R9 =00007fa588000080 R10=00007fa588008650 R11=0000000000000000 R12=00007fa588000020 R13=00007fa5880008d0 R14=fffffffffffffee0 R15=00007fa5880002f0 RIP=00007fa58ff5e9e7 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa58fb45700 00000000 00000000 GS =0000 0000000000000000 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=00007fa93abd94f0 CR3=000000001a0d0000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000