syzkaller login: [ 40.882925] BUG: Bad rss-counter state mm:00000000c41d6e1e type:MM_FILEPAGES val:33 [ 40.884226] BUG: Bad rss-counter state mm:00000000c41d6e1e type:MM_ANONPAGES val:22 [ 41.027961] ================================================================== [ 41.029119] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.030278] Read of size 8 at addr ffff88800fd2c798 by task sshd/221 [ 41.031380] [ 41.031619] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.032522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.033555] Call Trace: [ 41.033883] [ 41.034171] dump_stack_lvl+0x91/0xf0 [ 41.034671] print_report+0xcc/0x620 [ 41.035167] ? __virt_addr_valid+0x102/0x340 [ 41.035735] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.036373] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.037021] kasan_report+0xbe/0xf0 [ 41.037506] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.038141] vma_interval_tree_remove+0xc75/0xec0 [ 41.038758] vma_prepare+0xc54/0x11a0 [ 41.039246] __split_vma+0x5af/0x950 [ 41.039733] ? __pfx___split_vma+0x10/0x10 [ 41.040271] ? find_held_lock+0x2c/0x110 [ 41.040806] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.041406] ? lock_is_held_type+0x9f/0x120 [ 41.041958] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.042573] ? mtree_range_walk+0x632/0x900 [ 41.043138] ? mas_walk+0x5c7/0x7c0 [ 41.043627] do_vmi_munmap+0x1f1/0x2b0 [ 41.044129] mmap_region+0x1f9/0x2660 [ 41.044616] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.045147] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.045880] ? __pfx_lock_acquire+0x10/0x10 [ 41.046421] ? __pfx_mmap_region+0x10/0x10 [ 41.046973] ? security_mmap_addr+0x7d/0xa0 [ 41.047518] ? get_unmapped_area+0x1f5/0x3f0 [ 41.048099] do_mmap+0x854/0xf00 [ 41.048550] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.049072] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.049647] ksys_mmap_pgoff+0x3af/0x500 [ 41.050164] do_syscall_64+0x3f/0x90 [ 41.050650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.051310] RIP: 0033:0x7f412144dd82 [ 41.051781] 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 [ 41.053990] RSP: 002b:00007ffd99a2d248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.054921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f412144dd82 [ 41.055797] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4120887000 [ 41.056674] RBP: 00007f4120887000 R08: 0000000000000009 R09: 0000000000001000 [ 41.057548] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562afd137f70 [ 41.058420] R13: 00007ffd99a2d260 R14: 00007ffd99a2d290 R15: 00007ffd99a2d5f0 [ 41.059300] [ 41.059597] [ 41.059816] Allocated by task 214: [ 41.060258] kasan_save_stack+0x22/0x50 [ 41.060782] kasan_set_track+0x25/0x30 [ 41.061307] __kasan_slab_alloc+0x59/0x70 [ 41.061855] kmem_cache_alloc+0x16b/0x370 [ 41.062395] vm_area_dup+0x20/0x160 [ 41.062865] __split_vma+0x170/0x950 [ 41.063355] split_vma+0xc6/0x110 [ 41.063816] mprotect_fixup+0x8d2/0xb30 [ 41.064333] do_mprotect_pkey+0x87e/0xd40 [ 41.064869] __x64_sys_mprotect+0x78/0xc0 [ 41.065440] do_syscall_64+0x3f/0x90 [ 41.065931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.066594] [ 41.066817] Freed by task 204: [ 41.067221] kasan_save_stack+0x22/0x50 [ 41.067750] kasan_set_track+0x25/0x30 [ 41.068269] kasan_save_free_info+0x2b/0x50 [ 41.068824] __kasan_slab_free+0x10a/0x190 [ 41.069390] kmem_cache_free+0x10d/0x4d0 [ 41.069918] rcu_core+0x8c8/0x2860 [ 41.070383] __do_softirq+0x1b7/0x7d4 [ 41.070885] [ 41.071109] Last potentially related work creation: [ 41.071720] kasan_save_stack+0x22/0x50 [ 41.072302] __kasan_record_aux_stack+0x8e/0xa0 [ 41.072927] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.073620] remove_vma+0x139/0x170 [ 41.074089] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.074669] do_vmi_munmap+0x1f1/0x2b0 [ 41.075192] __vm_munmap+0x138/0x3a0 [ 41.075685] __x64_sys_munmap+0x59/0x80 [ 41.076201] do_syscall_64+0x3f/0x90 [ 41.076691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.077381] [ 41.077609] The buggy address belongs to the object at ffff88800fd2c740 [ 41.077609] which belongs to the cache vm_area_struct of size 168 [ 41.079162] The buggy address is located 88 bytes inside of [ 41.079162] freed 168-byte region [ffff88800fd2c740, ffff88800fd2c7e8) [ 41.080646] [ 41.080867] The buggy address belongs to the physical page: [ 41.081573] page:00000000372d03ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd2c [ 41.082723] memcg:ffff888018354e01 [ 41.083172] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.083845] page_type: 0xffffffff() [ 41.084318] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.085306] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018354e01 [ 41.086269] page dumped because: kasan: bad access detected [ 41.086956] [ 41.087180] Memory state around the buggy address: [ 41.087787] ffff88800fd2c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.088690] ffff88800fd2c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.089587] >ffff88800fd2c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.090464] ^ [ 41.090983] ffff88800fd2c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.091876] ffff88800fd2c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.092761] ================================================================== [ 41.093720] Disabling lock debugging due to kernel taint [ 43.121619] BUG: Bad rss-counter state mm:00000000a2b421f4 type:MM_FILEPAGES val:33 [ 43.122414] BUG: Bad rss-counter state mm:00000000a2b421f4 type:MM_ANONPAGES val:22 [ 43.622319] BUG: Bad rss-counter state mm:000000007d566970 type:MM_FILEPAGES val:33 [ 43.623505] BUG: Bad rss-counter state mm:000000007d566970 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64596' (ECDSA) to the list of known hosts. 2023/06/20 02:07:10 fuzzer started 2023/06/20 02:07:10 dialing manager at localhost:44161 2023/06/20 02:07:10 checking machine... 2023/06/20 02:07:10 checking revisions... [ 44.317065] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:07:10 testing simple program... [ 44.372103] cgroup: Unknown subsys name 'net' [ 44.422935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:07:00 Registers: info registers vcpu 0 RAX=0000000000000f01 RBX=0000000000001fb0 RCX=00007f3a680008d0 RDX=0000000000000001 RSI=0000000000000000 RDI=00007f3a68002b40 RBP=00007f3a68000020 RSP=00007f3a73e6c680 R8 =00007f3a73e70700 R9 =000055891253ee88 R10=0000000000000000 R11=0000000000000246 R12=00007f3a68000b90 R13=00007f3a68002b40 R14=0000000000000f00 R15=0000000000000001 RIP=00007f3a74287f73 RFL=00000246 [---Z-P-] 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 00007f3a73e70700 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=00007ffe5e8c2ee8 CR3=000000000fe16000 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=37303a3230203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732039303a3730 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363733 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888015984140 RCX=0000000000000100 RDX=1ffff11002b30839 RSI=0000000000004f75 RDI=ffff8880159841c8 RBP=0000000000004f75 RSP=ffff88806cf09c90 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=1ffff1100d9e1393 R13=0000000000000000 R14=ffff8880159841e0 R15=ffff888015984188 RIP=ffffffff8181f26c 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 00007f38110cb900 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=00007f3811680650 CR3=000000000ed74000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000