syzkaller login: [ 30.549102] BUG: Bad rss-counter state mm:0000000002f2037e type:MM_FILEPAGES val:33 [ 30.550393] BUG: Bad rss-counter state mm:0000000002f2037e type:MM_ANONPAGES val:22 [ 30.692868] ================================================================== [ 30.693617] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.694397] Read of size 8 at addr ffff88800fbf74e0 by task sshd/220 [ 30.695113] [ 30.695284] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.695992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.696789] Call Trace: [ 30.697152] [ 30.697372] dump_stack_lvl+0x91/0xf0 [ 30.697767] print_report+0xcc/0x620 [ 30.698141] ? __virt_addr_valid+0x102/0x340 [ 30.698573] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.699080] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.699568] kasan_report+0xbe/0xf0 [ 30.699944] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.700431] vma_interval_tree_remove+0xc75/0xec0 [ 30.700932] vma_prepare+0xc54/0x11a0 [ 30.701325] __split_vma+0x5af/0x950 [ 30.701677] ? __pfx___split_vma+0x10/0x10 [ 30.702094] ? find_held_lock+0x2c/0x110 [ 30.702470] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.702874] ? lock_is_held_type+0x9f/0x120 [ 30.703301] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.703725] ? mtree_range_walk+0x632/0x900 [ 30.704110] ? mas_walk+0x5c7/0x7c0 [ 30.704480] do_vmi_munmap+0x1f1/0x2b0 [ 30.704859] mmap_region+0x1f9/0x2660 [ 30.705198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.705569] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.706087] ? __pfx_lock_acquire+0x10/0x10 [ 30.706458] ? __pfx_mmap_region+0x10/0x10 [ 30.706864] ? security_mmap_addr+0x7d/0xa0 [ 30.707275] ? get_unmapped_area+0x1f5/0x3f0 [ 30.707661] do_mmap+0x854/0xf00 [ 30.707982] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.708358] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.708762] ksys_mmap_pgoff+0x3af/0x500 [ 30.709145] do_syscall_64+0x3f/0x90 [ 30.709526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.710058] RIP: 0033:0x7efd13884d82 [ 30.710379] 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 [ 30.711949] RSP: 002b:00007fff8ffcd928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.712599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd13884d82 [ 30.713260] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd12cbe000 [ 30.713836] RBP: 00007efd12cbe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.714470] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585698cfec0 [ 30.715068] R13: 00007fff8ffcd940 R14: 00007fff8ffcd970 R15: 00007fff8ffcdcd0 [ 30.715701] [ 30.715903] [ 30.716051] Allocated by task 213: [ 30.716350] kasan_save_stack+0x22/0x50 [ 30.716763] kasan_set_track+0x25/0x30 [ 30.717103] __kasan_slab_alloc+0x59/0x70 [ 30.717460] kmem_cache_alloc+0x16b/0x370 [ 30.717876] vm_area_dup+0x20/0x160 [ 30.718188] __split_vma+0x170/0x950 [ 30.718505] split_vma+0xc6/0x110 [ 30.718850] mprotect_fixup+0x8d2/0xb30 [ 30.719212] do_mprotect_pkey+0x87e/0xd40 [ 30.719566] __x64_sys_mprotect+0x78/0xc0 [ 30.719952] do_syscall_64+0x3f/0x90 [ 30.720303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.720769] [ 30.720917] Freed by task 213: [ 30.721231] kasan_save_stack+0x22/0x50 [ 30.721580] kasan_set_track+0x25/0x30 [ 30.721923] kasan_save_free_info+0x2b/0x50 [ 30.722327] __kasan_slab_free+0x10a/0x190 [ 30.722714] kmem_cache_free+0x10d/0x4d0 [ 30.723067] rcu_core+0x8c8/0x2860 [ 30.723389] __do_softirq+0x1b7/0x7d4 [ 30.723770] [ 30.723916] Last potentially related work creation: [ 30.724333] kasan_save_stack+0x22/0x50 [ 30.724720] __kasan_record_aux_stack+0x8e/0xa0 [ 30.725116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.725562] remove_vma+0x139/0x170 [ 30.725916] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.726295] do_vmi_munmap+0x1f1/0x2b0 [ 30.726646] __vm_munmap+0x138/0x3a0 [ 30.727011] __x64_sys_munmap+0x59/0x80 [ 30.727363] do_syscall_64+0x3f/0x90 [ 30.727704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.728171] [ 30.728332] The buggy address belongs to the object at ffff88800fbf7488 [ 30.728332] which belongs to the cache vm_area_struct of size 168 [ 30.729397] The buggy address is located 88 bytes inside of [ 30.729397] freed 168-byte region [ffff88800fbf7488, ffff88800fbf7530) [ 30.730396] [ 30.730572] The buggy address belongs to the physical page: [ 30.731064] page:000000007e35577d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbf7 [ 30.731865] memcg:ffff888015bc6701 [ 30.732170] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.732607] page_type: 0xffffffff() [ 30.732986] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.733617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015bc6701 [ 30.734308] page dumped because: kasan: bad access detected [ 30.734767] [ 30.734913] Memory state around the buggy address: [ 30.735314] ffff88800fbf7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.735913] ffff88800fbf7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.736498] >ffff88800fbf7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.737103] ^ [ 30.737622] ffff88800fbf7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.738220] ffff88800fbf7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.738806] ================================================================== [ 30.739523] Disabling lock debugging due to kernel taint [ 32.717207] BUG: Bad rss-counter state mm:0000000065ebc5ae type:MM_FILEPAGES val:33 [ 32.718284] BUG: Bad rss-counter state mm:0000000065ebc5ae type:MM_ANONPAGES val:22 [ 33.123306] BUG: Bad rss-counter state mm:000000008e740cd7 type:MM_FILEPAGES val:33 [ 33.124399] BUG: Bad rss-counter state mm:000000008e740cd7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65300' (ECDSA) to the list of known hosts. 2023/06/21 09:40:32 fuzzer started 2023/06/21 09:40:33 dialing manager at localhost:36067 2023/06/21 09:40:33 checking machine... 2023/06/21 09:40:33 checking revisions... [ 33.815706] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:40:33 testing simple program... [ 33.864021] cgroup: Unknown subsys name 'net' [ 33.905628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:40:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=000055e25eeb8000 CR3=0000000005482000 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=00007fa95b7ac510000055ba88525790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff8880101d7578 RCX=0000000000000001 RDX=1ffff1100203aeba RSI=ffff8880101d7f10 RDI=ffffffff8450cc7f RBP=ffff8880101d75d0 RSP=ffff8880101d7560 R8 =0000000000000001 R9 =ffff8880101d75b8 R10=0000000000038001 R11=000000000002273d R12=ffff8880101d7640 R13=0000000000000000 R14=ffff88800fbd1b40 R15=0000000000092c40 RIP=ffffffff81130399 RFL=00000202 [-------] 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 00007ff4ecaf9700 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=00007fc454ccd0b0 CR3=000000000f466000 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=2032333a30343a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000