syzkaller login: [ 34.905682] BUG: Bad rss-counter state mm:000000002dab1f9d type:MM_FILEPAGES val:33 [ 34.906948] BUG: Bad rss-counter state mm:000000002dab1f9d type:MM_ANONPAGES val:22 [ 34.949640] ================================================================== [ 34.950624] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.951727] Read of size 8 at addr ffff88800daefed8 by task sshd/220 [ 34.952588] [ 34.952830] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.953800] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.954872] Call Trace: [ 34.955223] [ 34.955541] dump_stack_lvl+0x91/0xf0 [ 34.956086] print_report+0xcc/0x620 [ 34.956626] ? __virt_addr_valid+0x102/0x340 [ 34.957235] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.957914] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.958587] kasan_report+0xbe/0xf0 [ 34.959104] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.959795] vma_interval_tree_remove+0xc75/0xec0 [ 34.960461] vma_prepare+0xc54/0x11a0 [ 34.961001] __split_vma+0x5af/0x950 [ 34.961527] ? __pfx___split_vma+0x10/0x10 [ 34.962094] ? find_held_lock+0x2c/0x110 [ 34.962695] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.963318] ? lock_is_held_type+0x9f/0x120 [ 34.963920] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.964610] ? mtree_range_walk+0x632/0x900 [ 34.965236] ? mas_walk+0x5c7/0x7c0 [ 34.965762] do_vmi_munmap+0x1f1/0x2b0 [ 34.966300] mmap_region+0x1f9/0x2660 [ 34.966839] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.967398] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.968182] ? __pfx_lock_acquire+0x10/0x10 [ 34.968782] ? __pfx_mmap_region+0x10/0x10 [ 34.969371] ? security_mmap_addr+0x7d/0xa0 [ 34.969958] ? get_unmapped_area+0x1f5/0x3f0 [ 34.970585] do_mmap+0x854/0xf00 [ 34.971067] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.971621] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.972239] ksys_mmap_pgoff+0x3af/0x500 [ 34.972818] do_syscall_64+0x3f/0x90 [ 34.973366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.974086] RIP: 0033:0x7f48436e4d82 [ 34.974755] 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 [ 34.977133] RSP: 002b:00007fffb01c1d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.978137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48436e4d82 [ 34.979088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4842b1e000 [ 34.980035] RBP: 00007f4842b1e000 R08: 0000000000000009 R09: 0000000000001000 [ 34.981002] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e969858ec0 [ 34.981954] R13: 00007fffb01c1d40 R14: 00007fffb01c1d70 R15: 00007fffb01c20d0 [ 34.982902] [ 34.983228] [ 34.983466] Allocated by task 213: [ 34.983970] kasan_save_stack+0x22/0x50 [ 34.984541] kasan_set_track+0x25/0x30 [ 34.985117] __kasan_slab_alloc+0x59/0x70 [ 34.985716] kmem_cache_alloc+0x16b/0x370 [ 34.986295] vm_area_dup+0x20/0x160 [ 34.986817] __split_vma+0x170/0x950 [ 34.987333] split_vma+0xc6/0x110 [ 34.987834] mprotect_fixup+0x8d2/0xb30 [ 34.988387] do_mprotect_pkey+0x87e/0xd40 [ 34.988989] __x64_sys_mprotect+0x78/0xc0 [ 34.989591] do_syscall_64+0x3f/0x90 [ 34.990120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.990845] [ 34.991085] Freed by task 213: [ 34.991525] kasan_save_stack+0x22/0x50 [ 34.992089] kasan_set_track+0x25/0x30 [ 34.992662] kasan_save_free_info+0x2b/0x50 [ 34.993272] __kasan_slab_free+0x10a/0x190 [ 34.993883] kmem_cache_free+0x10d/0x4d0 [ 34.994454] rcu_core+0x8c8/0x2860 [ 34.994969] __do_softirq+0x1b7/0x7d4 [ 34.995504] [ 34.995758] Last potentially related work creation: [ 34.996412] kasan_save_stack+0x22/0x50 [ 34.997012] __kasan_record_aux_stack+0x8e/0xa0 [ 34.997675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.998399] remove_vma+0x139/0x170 [ 34.998922] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.999558] do_vmi_munmap+0x1f1/0x2b0 [ 35.000106] __vm_munmap+0x138/0x3a0 [ 35.000641] __x64_sys_munmap+0x59/0x80 [ 35.001227] do_syscall_64+0x3f/0x90 [ 35.001767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.002485] [ 35.002750] The buggy address belongs to the object at ffff88800daefe80 [ 35.002750] which belongs to the cache vm_area_struct of size 168 [ 35.004422] The buggy address is located 88 bytes inside of [ 35.004422] freed 168-byte region [ffff88800daefe80, ffff88800daeff28) [ 35.006061] [ 35.006307] The buggy address belongs to the physical page: [ 35.007065] page:000000003415b9b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaef [ 35.008515] memcg:ffff88800c9de301 [ 35.009139] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.010048] page_type: 0xffffffff() [ 35.010674] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.011960] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9de301 [ 35.013242] page dumped because: kasan: bad access detected [ 35.014169] [ 35.014471] Memory state around the buggy address: [ 35.015290] ffff88800daefd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.016398] ffff88800daefe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.017586] >ffff88800daefe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.018815] ^ [ 35.019895] ffff88800daeff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.021157] ffff88800daeff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.022392] ================================================================== [ 35.024080] Disabling lock debugging due to kernel taint [ 36.695649] BUG: Bad rss-counter state mm:00000000744bc3ea type:MM_FILEPAGES val:33 [ 36.697558] BUG: Bad rss-counter state mm:00000000744bc3ea type:MM_ANONPAGES val:22 [ 37.203780] BUG: Bad rss-counter state mm:00000000753d8bbe type:MM_FILEPAGES val:33 [ 37.204846] BUG: Bad rss-counter state mm:00000000753d8bbe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19501' (ECDSA) to the list of known hosts. 2023/06/20 08:01:03 fuzzer started 2023/06/20 08:01:04 dialing manager at localhost:44161 2023/06/20 08:01:04 checking machine... 2023/06/20 08:01:04 checking revisions... [ 37.943818] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:01:04 testing simple program... [ 38.002135] cgroup: Unknown subsys name 'net' [ 38.072054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:00:59 Registers: info registers vcpu 0 RAX=ffffea000038d9c0 RBX=ffff88800e3670e8 RCX=ffff88800879fc80 RDX=ffff88808e3670e8 RSI=0000000000000008 RDI=ffffffff818061b3 RBP=0000000000000000 RSP=ffff888019ff7918 R8 =ffff88800e3670e8 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000120011 R12=dffffc0000000000 R13=ffff888019ff7958 R14=0000000000000000 R15=ffff88800def91b0 RIP=ffffffff81810213 RFL=00000286 [--S--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 00007fd281c2a700 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=00007f8e60ed1d60 CR3=000000000e6a4000 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=2033303a31303a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a31303a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f217628 RCX=0000000000000001 RDX=1ffff11001e42ed7 RSI=ffffffff83664a09 RDI=ffff88800f217634 RBP=ffff88800f2176b8 RSP=ffff88800f217540 R8 =0000000000000001 R9 =ffff88800f2175a0 R10=0000000000038001 R11=0000000000020c50 R12=ffff88800f217628 R13=0000000000000000 R14=ffff888016c83680 R15=ffff88800db8d390 RIP=ffffffff813ad4f7 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 00007fa3975dd900 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=00007ffc22db1000 CR3=0000000015b28000 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=6720646572637465733a4d41503d706f 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