syzkaller login: [ 32.857010] BUG: Bad rss-counter state mm:0000000011419910 type:MM_FILEPAGES val:33 [ 32.858016] BUG: Bad rss-counter state mm:0000000011419910 type:MM_ANONPAGES val:22 [ 33.026666] ================================================================== [ 33.027606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.028597] Read of size 8 at addr ffff88800eb17310 by task sshd/220 [ 33.029487] [ 33.029714] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.030625] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.031670] Call Trace: [ 33.032012] [ 33.032306] dump_stack_lvl+0x91/0xf0 [ 33.032824] print_report+0xcc/0x620 [ 33.033329] ? __virt_addr_valid+0x102/0x340 [ 33.033905] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.034553] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.035197] kasan_report+0xbe/0xf0 [ 33.035692] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.036365] vma_interval_tree_remove+0xc75/0xec0 [ 33.037007] vma_prepare+0xc54/0x11a0 [ 33.037523] __split_vma+0x5af/0x950 [ 33.038029] ? __pfx___split_vma+0x10/0x10 [ 33.038599] ? find_held_lock+0x2c/0x110 [ 33.039154] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.039757] ? lock_is_held_type+0x9f/0x120 [ 33.040351] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.041001] ? mtree_range_walk+0x632/0x900 [ 33.041598] ? mas_walk+0x5c7/0x7c0 [ 33.042108] do_vmi_munmap+0x1f1/0x2b0 [ 33.042637] mmap_region+0x1f9/0x2660 [ 33.043154] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.043700] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.044488] ? __pfx_lock_acquire+0x10/0x10 [ 33.045052] ? __pfx_mmap_region+0x10/0x10 [ 33.045607] ? security_mmap_addr+0x7d/0xa0 [ 33.046157] ? get_unmapped_area+0x1f5/0x3f0 [ 33.046730] do_mmap+0x854/0xf00 [ 33.047191] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.047706] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.048300] ksys_mmap_pgoff+0x3af/0x500 [ 33.048827] do_syscall_64+0x3f/0x90 [ 33.049323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.049994] RIP: 0033:0x7f433180ad82 [ 33.050472] 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 [ 33.052883] RSP: 002b:00007ffff098c0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.053853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f433180ad82 [ 33.054766] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4330c44000 [ 33.055673] RBP: 00007f4330c44000 R08: 0000000000000009 R09: 0000000000001000 [ 33.056592] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587f7525ec0 [ 33.057496] R13: 00007ffff098c0e0 R14: 00007ffff098c110 R15: 00007ffff098c470 [ 33.058411] [ 33.058723] [ 33.058956] Allocated by task 212: [ 33.059414] kasan_save_stack+0x22/0x50 [ 33.059968] kasan_set_track+0x25/0x30 [ 33.060498] __kasan_slab_alloc+0x59/0x70 [ 33.061057] kmem_cache_alloc+0x16b/0x370 [ 33.061623] vm_area_dup+0x20/0x160 [ 33.062101] __split_vma+0x170/0x950 [ 33.062603] split_vma+0xc6/0x110 [ 33.063073] mprotect_fixup+0x8d2/0xb30 [ 33.063606] do_mprotect_pkey+0x87e/0xd40 [ 33.064193] __x64_sys_mprotect+0x78/0xc0 [ 33.064750] do_syscall_64+0x3f/0x90 [ 33.065260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.065944] [ 33.066174] Freed by task 19: [ 33.066591] kasan_save_stack+0x22/0x50 [ 33.067134] kasan_set_track+0x25/0x30 [ 33.067657] kasan_save_free_info+0x2b/0x50 [ 33.068238] __kasan_slab_free+0x10a/0x190 [ 33.068809] kmem_cache_free+0x10d/0x4d0 [ 33.069346] rcu_core+0x8c8/0x2860 [ 33.069823] __do_softirq+0x1b7/0x7d4 [ 33.070332] [ 33.070567] Last potentially related work creation: [ 33.071196] kasan_save_stack+0x22/0x50 [ 33.071732] __kasan_record_aux_stack+0x8e/0xa0 [ 33.072395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.073084] remove_vma+0x139/0x170 [ 33.073573] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.074164] do_vmi_munmap+0x1f1/0x2b0 [ 33.074684] __vm_munmap+0x138/0x3a0 [ 33.075184] __x64_sys_munmap+0x59/0x80 [ 33.075716] do_syscall_64+0x3f/0x90 [ 33.076233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.076917] [ 33.077149] The buggy address belongs to the object at ffff88800eb172b8 [ 33.077149] which belongs to the cache vm_area_struct of size 168 [ 33.078720] The buggy address is located 88 bytes inside of [ 33.078720] freed 168-byte region [ffff88800eb172b8, ffff88800eb17360) [ 33.080223] [ 33.080457] The buggy address belongs to the physical page: [ 33.081160] page:00000000ae3abdbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb17 [ 33.082323] memcg:ffff88800cb5d201 [ 33.082776] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.083471] page_type: 0xffffffff() [ 33.083963] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.084949] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb5d201 [ 33.085928] page dumped because: kasan: bad access detected [ 33.086641] [ 33.086870] Memory state around the buggy address: [ 33.087496] ffff88800eb17200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.088417] ffff88800eb17280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.089326] >ffff88800eb17300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.090239] ^ [ 33.090735] ffff88800eb17380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.091638] ffff88800eb17400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.092567] ================================================================== [ 33.093636] Disabling lock debugging due to kernel taint [ 35.278462] BUG: Bad rss-counter state mm:00000000a159b04f type:MM_FILEPAGES val:33 [ 35.279575] BUG: Bad rss-counter state mm:00000000a159b04f type:MM_ANONPAGES val:22 [ 35.757329] BUG: Bad rss-counter state mm:0000000031503ee6 type:MM_FILEPAGES val:33 [ 35.758313] BUG: Bad rss-counter state mm:0000000031503ee6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42754' (ECDSA) to the list of known hosts. 2023/06/19 14:27:46 fuzzer started 2023/06/19 14:27:46 dialing manager at localhost:44161 2023/06/19 14:27:46 checking machine... 2023/06/19 14:27:46 checking revisions... [ 36.516746] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:27:46 testing simple program... [ 36.567694] cgroup: Unknown subsys name 'net' [ 36.610801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:27:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000560b38170ee0 RCX=00007f97e927f8d0 RDX=00007f97e927f870 RSI=0000560b38167a20 RDI=0000560b38163e00 RBP=00007f97dc004920 RSP=00007f97e927f830 R8 =00007f97e9280700 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000286 R12=00007f97e927f8d0 R13=00007f97e927f870 R14=0000560b38167a20 R15=0000560b38167a20 RIP=0000560b3791c948 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 00007f97e9280700 00000000 00000000 GS =0000 0000000000000000 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=00007f1f166d77d0 CR3=0000000014790000 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=2035343a37323a3431203931206e754a XMM01=5f687373203a726f727265203a5d3733 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a37323a3431203931 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d19ddb RBX=ffff88800e8ceea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e8ceed8 RBP=ffff88801be12bc8 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88801be58a80 R14=ffffffff818d9dc6 R15=ffff88800db61d00 RIP=ffffffff81846362 RFL=00000046 [---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 00007fe4ad99f900 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=00007fe4ad97e020 CR3=000000000c6be000 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