syzkaller login: [ 35.715440] BUG: Bad rss-counter state mm:00000000c1e77b27 type:MM_FILEPAGES val:33 [ 35.716832] BUG: Bad rss-counter state mm:00000000c1e77b27 type:MM_ANONPAGES val:22 [ 35.893188] ================================================================== [ 35.894156] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.895115] Read of size 8 at addr ffff888019c8c058 by task sshd/220 [ 35.896042] [ 35.896302] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.897184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.898199] Call Trace: [ 35.898535] [ 35.898825] dump_stack_lvl+0x91/0xf0 [ 35.899313] print_report+0xcc/0x620 [ 35.899822] ? __virt_addr_valid+0x102/0x340 [ 35.900402] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.901038] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.901694] kasan_report+0xbe/0xf0 [ 35.902173] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.902812] vma_interval_tree_remove+0xc75/0xec0 [ 35.903423] vma_prepare+0xc54/0x11a0 [ 35.903928] __split_vma+0x5af/0x950 [ 35.904420] ? __pfx___split_vma+0x10/0x10 [ 35.904962] ? find_held_lock+0x2c/0x110 [ 35.905507] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.906076] ? lock_is_held_type+0x9f/0x120 [ 35.906653] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.907265] ? mtree_range_walk+0x632/0x900 [ 35.907851] ? mas_walk+0x5c7/0x7c0 [ 35.908349] do_vmi_munmap+0x1f1/0x2b0 [ 35.908873] mmap_region+0x1f9/0x2660 [ 35.909356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.909888] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.910639] ? __pfx_lock_acquire+0x10/0x10 [ 35.911170] ? __pfx_mmap_region+0x10/0x10 [ 35.911732] ? security_mmap_addr+0x7d/0xa0 [ 35.912278] ? get_unmapped_area+0x1f5/0x3f0 [ 35.912863] do_mmap+0x854/0xf00 [ 35.913299] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.913818] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.914377] ksys_mmap_pgoff+0x3af/0x500 [ 35.914901] do_syscall_64+0x3f/0x90 [ 35.915381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.916061] RIP: 0033:0x7f89ac387d82 [ 35.916560] 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 [ 35.918749] RSP: 002b:00007ffee214bc58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.919686] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89ac387d82 [ 35.920562] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89ab7c1000 [ 35.921411] RBP: 00007f89ab7c1000 R08: 0000000000000009 R09: 0000000000001000 [ 35.922275] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f92da59b20 [ 35.923145] R13: 00007ffee214bc70 R14: 00007ffee214bca0 R15: 00007ffee214c000 [ 35.924036] [ 35.924347] [ 35.924576] Allocated by task 213: [ 35.925010] kasan_save_stack+0x22/0x50 [ 35.925539] kasan_set_track+0x25/0x30 [ 35.926038] __kasan_slab_alloc+0x59/0x70 [ 35.926578] kmem_cache_alloc+0x16b/0x370 [ 35.927099] vm_area_dup+0x20/0x160 [ 35.927575] __split_vma+0x170/0x950 [ 35.928051] split_vma+0xc6/0x110 [ 35.928528] mprotect_fixup+0x8d2/0xb30 [ 35.929040] do_mprotect_pkey+0x87e/0xd40 [ 35.929584] __x64_sys_mprotect+0x78/0xc0 [ 35.930119] do_syscall_64+0x3f/0x90 [ 35.930610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.931260] [ 35.931489] Freed by task 203: [ 35.931897] kasan_save_stack+0x22/0x50 [ 35.932413] kasan_set_track+0x25/0x30 [ 35.932940] kasan_save_free_info+0x2b/0x50 [ 35.933473] __kasan_slab_free+0x10a/0x190 [ 35.934014] kmem_cache_free+0x10d/0x4d0 [ 35.934536] rcu_core+0x8c8/0x2860 [ 35.934990] __do_softirq+0x1b7/0x7d4 [ 35.935473] [ 35.935714] Last potentially related work creation: [ 35.936325] kasan_save_stack+0x22/0x50 [ 35.936863] __kasan_record_aux_stack+0x8e/0xa0 [ 35.937432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.938100] remove_vma+0x139/0x170 [ 35.938567] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.939126] do_vmi_munmap+0x1f1/0x2b0 [ 35.939645] __vm_munmap+0x138/0x3a0 [ 35.940134] __x64_sys_munmap+0x59/0x80 [ 35.940647] do_syscall_64+0x3f/0x90 [ 35.941123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.941779] [ 35.941993] The buggy address belongs to the object at ffff888019c8c000 [ 35.941993] which belongs to the cache vm_area_struct of size 168 [ 35.943487] The buggy address is located 88 bytes inside of [ 35.943487] freed 168-byte region [ffff888019c8c000, ffff888019c8c0a8) [ 35.944954] [ 35.945174] The buggy address belongs to the physical page: [ 35.945845] page:000000004b2455c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c8c [ 35.946958] memcg:ffff888016d90801 [ 35.947384] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.948052] page_type: 0xffffffff() [ 35.948550] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.949484] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d90801 [ 35.950404] page dumped because: kasan: bad access detected [ 35.951086] [ 35.951306] Memory state around the buggy address: [ 35.951911] ffff888019c8bf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 35.952828] ffff888019c8bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.953707] >ffff888019c8c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.954571] ^ [ 35.955313] ffff888019c8c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.956200] ffff888019c8c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.957074] ================================================================== [ 35.958403] Disabling lock debugging due to kernel taint [ 38.787273] BUG: Bad rss-counter state mm:000000002ab07b3e type:MM_FILEPAGES val:33 [ 38.788345] BUG: Bad rss-counter state mm:000000002ab07b3e type:MM_ANONPAGES val:22 [ 39.267486] BUG: Bad rss-counter state mm:0000000071b03059 type:MM_FILEPAGES val:33 [ 39.268649] BUG: Bad rss-counter state mm:0000000071b03059 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57124' (ECDSA) to the list of known hosts. 2023/06/19 20:27:26 fuzzer started 2023/06/19 20:27:26 dialing manager at localhost:44161 2023/06/19 20:27:26 checking machine... 2023/06/19 20:27:26 checking revisions... [ 39.978146] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:27:26 testing simple program... [ 40.030955] cgroup: Unknown subsys name 'net' [ 40.075866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:27:21 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffdd3e66328 CR3=000000000c60a000 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=2035323a37323a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a37323a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c28c68 RBX=0000000000000001 RCX=ffffffff86146340 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff8880146a7940 RBP=ffff8880146a7930 RSP=ffff8880146a7868 R8 =ffffffff86146344 R9 =ffff8880146a7918 R10=0000000000038001 R11=0000000000023535 R12=ffff8880146a7938 R13=ffff8880146a7920 R14=ffff8880146a7db0 R15=ffff8880146a78d8 RIP=ffffffff81131118 RFL=00000213 [----A-C] 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 00007fd96449e900 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=00007f3bad9fd650 CR3=000000000d73a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=56483157ec97e46e00000000000ae988 XMM05=82b431b9e73b293b0000000000135178 XMM06=4fda316b135da52b0000000000133f68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000