syzkaller login: [ 68.409172] BUG: Bad rss-counter state mm:00000000598d6a47 type:MM_FILEPAGES val:33 [ 68.410202] BUG: Bad rss-counter state mm:00000000598d6a47 type:MM_ANONPAGES val:22 [ 68.575537] ================================================================== [ 68.576463] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.577412] Read of size 8 at addr ffff88800e5b1228 by task sshd/220 [ 68.578307] [ 68.578532] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 68.579437] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.580421] Call Trace: [ 68.580752] [ 68.581040] dump_stack_lvl+0x91/0xf0 [ 68.581553] print_report+0xcc/0x620 [ 68.582054] ? __virt_addr_valid+0x102/0x340 [ 68.582635] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.583266] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.583906] kasan_report+0xbe/0xf0 [ 68.584405] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.585052] vma_interval_tree_remove+0xc75/0xec0 [ 68.585684] vma_prepare+0xc54/0x11a0 [ 68.586175] __split_vma+0x5af/0x950 [ 68.586688] ? __pfx___split_vma+0x10/0x10 [ 68.587253] ? find_held_lock+0x2c/0x110 [ 68.587800] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.588384] ? lock_is_held_type+0x9f/0x120 [ 68.588955] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.589593] ? mtree_range_walk+0x632/0x900 [ 68.590161] ? mas_walk+0x5c7/0x7c0 [ 68.590658] do_vmi_munmap+0x1f1/0x2b0 [ 68.591169] mmap_region+0x1f9/0x2660 [ 68.591670] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.592201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.592931] ? __pfx_lock_acquire+0x10/0x10 [ 68.593484] ? __pfx_mmap_region+0x10/0x10 [ 68.594023] ? security_mmap_addr+0x7d/0xa0 [ 68.594590] ? get_unmapped_area+0x1f5/0x3f0 [ 68.595165] do_mmap+0x854/0xf00 [ 68.595614] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.596131] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.596721] ksys_mmap_pgoff+0x3af/0x500 [ 68.597245] do_syscall_64+0x3f/0x90 [ 68.597739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.598414] RIP: 0033:0x7fb4ca144d82 [ 68.598894] 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 [ 68.601100] RSP: 002b:00007fff17b4eaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.602031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4ca144d82 [ 68.602923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4c957e000 [ 68.603814] RBP: 00007fb4c957e000 R08: 0000000000000009 R09: 0000000000001000 [ 68.604713] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572d78a3b20 [ 68.605610] R13: 00007fff17b4eac0 R14: 00007fff17b4eaf0 R15: 00007fff17b4ee50 [ 68.606512] [ 68.606835] [ 68.607055] Allocated by task 213: [ 68.607503] kasan_save_stack+0x22/0x50 [ 68.608027] kasan_set_track+0x25/0x30 [ 68.608544] __kasan_slab_alloc+0x59/0x70 [ 68.609086] kmem_cache_alloc+0x16b/0x370 [ 68.609623] vm_area_dup+0x20/0x160 [ 68.610093] __split_vma+0x170/0x950 [ 68.610576] split_vma+0xc6/0x110 [ 68.611028] mprotect_fixup+0x8d2/0xb30 [ 68.611541] do_mprotect_pkey+0x87e/0xd40 [ 68.612075] __x64_sys_mprotect+0x78/0xc0 [ 68.612612] do_syscall_64+0x3f/0x90 [ 68.613104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.613760] [ 68.613984] Freed by task 213: [ 68.614389] kasan_save_stack+0x22/0x50 [ 68.614904] kasan_set_track+0x25/0x30 [ 68.615416] kasan_save_free_info+0x2b/0x50 [ 68.615941] __kasan_slab_free+0x10a/0x190 [ 68.616468] kmem_cache_free+0x10d/0x4d0 [ 68.616975] rcu_core+0x8c8/0x2860 [ 68.617415] __do_softirq+0x1b7/0x7d4 [ 68.617884] [ 68.618101] Last potentially related work creation: [ 68.618715] kasan_save_stack+0x22/0x50 [ 68.619213] __kasan_record_aux_stack+0x8e/0xa0 [ 68.619785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.620431] remove_vma+0x139/0x170 [ 68.620891] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.621447] do_vmi_munmap+0x1f1/0x2b0 [ 68.621939] __vm_munmap+0x138/0x3a0 [ 68.622403] __x64_sys_munmap+0x59/0x80 [ 68.622908] do_syscall_64+0x3f/0x90 [ 68.623381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.624019] [ 68.624235] The buggy address belongs to the object at ffff88800e5b11d0 [ 68.624235] which belongs to the cache vm_area_struct of size 168 [ 68.625714] The buggy address is located 88 bytes inside of [ 68.625714] freed 168-byte region [ffff88800e5b11d0, ffff88800e5b1278) [ 68.627113] [ 68.627325] The buggy address belongs to the physical page: [ 68.627976] page:00000000064d0159 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5b1 [ 68.629054] memcg:ffff88800e46e501 [ 68.629474] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.630110] page_type: 0xffffffff() [ 68.630574] raw: 0100000000000200 ffff88800879fc80 ffffea000051e780 dead000000000002 [ 68.631498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e46e501 [ 68.632402] page dumped because: kasan: bad access detected [ 68.633056] [ 68.633272] Memory state around the buggy address: [ 68.633851] ffff88800e5b1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.634719] ffff88800e5b1180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 68.635565] >ffff88800e5b1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 68.636409] ^ [ 68.636957] ffff88800e5b1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 68.637816] ffff88800e5b1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 68.638670] ================================================================== [ 68.639629] Disabling lock debugging due to kernel taint [ 70.634546] BUG: Bad rss-counter state mm:000000002e714512 type:MM_FILEPAGES val:33 [ 70.635738] BUG: Bad rss-counter state mm:000000002e714512 type:MM_ANONPAGES val:22 [ 71.090357] BUG: Bad rss-counter state mm:00000000fce2b58c type:MM_FILEPAGES val:33 [ 71.091600] BUG: Bad rss-counter state mm:00000000fce2b58c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18566' (ECDSA) to the list of known hosts. 2023/06/19 13:35:36 fuzzer started 2023/06/19 13:35:36 dialing manager at localhost:44161 2023/06/19 13:35:36 checking machine... 2023/06/19 13:35:36 checking revisions... [ 71.723547] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:35:36 testing simple program... [ 71.768647] cgroup: Unknown subsys name 'net' [ 71.806552] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:35:29 Registers: info registers vcpu 0 RAX=ffff888008d80001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d7ff01 RSI=ffff888008d7ff50 RDI=ffff888008d7f988 RBP=ffff888008d7ff50 RSP=ffff888008d7f8e0 R8 =ffffffff860acb4c R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000009bea R12=0000000000000008 R13=ffff888008d78000 R14=ffff888008d7ff58 R15=ffff888008d7f978 RIP=ffffffff811304ce 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 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=00007fa95b58c780 CR3=000000000ca78000 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=4d5f8f145fcb53902845bc6438fa07e7 XMM02=000000000011fd10eff9b2d0a8fce9cb XMM03=000000000011fde02c67c8bc2e329bc3 XMM04=0b825b0ed82428b600000000000ae988 XMM05=ac25c2425267b3500000000000135200 XMM06=19e9129bd510f23500000000001340b8 XMM07=fb795ef6d65770560000000000124528 XMM08=2c67c8bc2e329bc3000000000011fd80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800de23180 RCX=0000000000000000 RDX=1ffff1100337740a RSI=ffffffff8186475d RDI=ffff888019bba050 RBP=ffff88800de23300 RSP=ffff888017997d60 R8 =0000000000000003 R9 =0000000000004000 R10=0000000000008000 R11=00000000000b6996 R12=000000000000005a R13=ffff888019bba000 R14=1ffff11002f32fb2 R15=ffff888019ba1680 RIP=ffffffff814c07e0 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 00007fafe4db6700 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=00007ffd7c7fa000 CR3=0000000015f60000 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=2036333a35333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a35333a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000