syzkaller login: [ 30.556260] BUG: Bad rss-counter state mm:000000006b0da9c8 type:MM_FILEPAGES val:33 [ 30.557333] BUG: Bad rss-counter state mm:000000006b0da9c8 type:MM_ANONPAGES val:22 [ 30.733542] ================================================================== [ 30.734441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.735340] Read of size 8 at addr ffff888009d333f8 by task sshd/219 [ 30.736082] [ 30.736427] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.737246] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.738170] Call Trace: [ 30.738494] [ 30.738768] dump_stack_lvl+0x91/0xf0 [ 30.739244] print_report+0xcc/0x620 [ 30.739736] ? __virt_addr_valid+0x102/0x340 [ 30.740267] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740862] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741449] kasan_report+0xbe/0xf0 [ 30.741907] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.742504] vma_interval_tree_remove+0xc75/0xec0 [ 30.743083] vma_prepare+0xc54/0x11a0 [ 30.743550] __split_vma+0x5af/0x950 [ 30.744005] ? __pfx___split_vma+0x10/0x10 [ 30.744513] ? find_held_lock+0x2c/0x110 [ 30.745021] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.745561] ? lock_is_held_type+0x9f/0x120 [ 30.746079] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.746658] ? mtree_range_walk+0x632/0x900 [ 30.747196] ? mas_walk+0x5c7/0x7c0 [ 30.747675] do_vmi_munmap+0x1f1/0x2b0 [ 30.748148] mmap_region+0x1f9/0x2660 [ 30.748620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.749115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.749797] ? __pfx_lock_acquire+0x10/0x10 [ 30.750307] ? __pfx_mmap_region+0x10/0x10 [ 30.750812] ? security_mmap_addr+0x7d/0xa0 [ 30.751321] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751858] do_mmap+0x854/0xf00 [ 30.752282] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.753298] ksys_mmap_pgoff+0x3af/0x500 [ 30.753785] do_syscall_64+0x3f/0x90 [ 30.754246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754867] RIP: 0033:0x7f5c177e2d82 [ 30.755306] 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 [ 30.757344] RSP: 002b:00007ffc10838b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.758211] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5c177e2d82 [ 30.759024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5c16c1c000 [ 30.759855] RBP: 00007f5c16c1c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.760666] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595a37c6ec0 [ 30.761477] R13: 00007ffc10838b20 R14: 00007ffc10838b50 R15: 00007ffc10838eb0 [ 30.762305] [ 30.762589] [ 30.762797] Allocated by task 212: [ 30.763213] kasan_save_stack+0x22/0x50 [ 30.763716] kasan_set_track+0x25/0x30 [ 30.764200] __kasan_slab_alloc+0x59/0x70 [ 30.764726] kmem_cache_alloc+0x16b/0x370 [ 30.765250] vm_area_dup+0x20/0x160 [ 30.765720] __split_vma+0x170/0x950 [ 30.766222] split_vma+0xc6/0x110 [ 30.766676] mprotect_fixup+0x8d2/0xb30 [ 30.767183] do_mprotect_pkey+0x87e/0xd40 [ 30.767717] __x64_sys_mprotect+0x78/0xc0 [ 30.768259] do_syscall_64+0x3f/0x90 [ 30.768754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769421] [ 30.769640] Freed by task 202: [ 30.770046] kasan_save_stack+0x22/0x50 [ 30.770565] kasan_set_track+0x25/0x30 [ 30.771076] kasan_save_free_info+0x2b/0x50 [ 30.771636] __kasan_slab_free+0x10a/0x190 [ 30.772192] kmem_cache_free+0x10d/0x4d0 [ 30.772718] rcu_core+0x8c8/0x2860 [ 30.773185] __do_softirq+0x1b7/0x7d4 [ 30.773684] [ 30.773910] Last potentially related work creation: [ 30.774519] kasan_save_stack+0x22/0x50 [ 30.775047] __kasan_record_aux_stack+0x8e/0xa0 [ 30.775653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.776332] remove_vma+0x139/0x170 [ 30.776802] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.777380] do_vmi_munmap+0x1f1/0x2b0 [ 30.777887] __vm_munmap+0x138/0x3a0 [ 30.778377] __x64_sys_munmap+0x59/0x80 [ 30.778886] do_syscall_64+0x3f/0x90 [ 30.779380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.780043] [ 30.780268] Second to last potentially related work creation: [ 30.780979] kasan_save_stack+0x22/0x50 [ 30.781504] __kasan_record_aux_stack+0x8e/0xa0 [ 30.782096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.782755] remove_vma+0x139/0x170 [ 30.783228] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783820] do_vmi_munmap+0x1f1/0x2b0 [ 30.784329] mmap_region+0x1f9/0x2660 [ 30.784826] do_mmap+0x854/0xf00 [ 30.785276] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785782] ksys_mmap_pgoff+0x3af/0x500 [ 30.786303] do_syscall_64+0x3f/0x90 [ 30.786797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787475] [ 30.787696] The buggy address belongs to the object at ffff888009d333a0 [ 30.787696] which belongs to the cache vm_area_struct of size 168 [ 30.789232] The buggy address is located 88 bytes inside of [ 30.789232] freed 168-byte region [ffff888009d333a0, ffff888009d33448) [ 30.790671] [ 30.790889] The buggy address belongs to the physical page: [ 30.791576] page:00000000a2fa0b05 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d33 [ 30.792677] memcg:ffff88800f6f2501 [ 30.793120] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.793781] page_type: 0xffffffff() [ 30.794250] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.795204] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6f2501 [ 30.796155] page dumped because: kasan: bad access detected [ 30.796833] [ 30.797059] Memory state around the buggy address: [ 30.797647] ffff888009d33280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.798546] ffff888009d33300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.799423] >ffff888009d33380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.800309] ^ [ 30.801176] ffff888009d33400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.802065] ffff888009d33480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.802940] ================================================================== [ 30.804036] Disabling lock debugging due to kernel taint [ 33.101242] BUG: Bad rss-counter state mm:000000008ce1d64f type:MM_FILEPAGES val:33 [ 33.102335] BUG: Bad rss-counter state mm:000000008ce1d64f type:MM_ANONPAGES val:22 [ 33.613275] BUG: Bad rss-counter state mm:00000000b541ce9a type:MM_FILEPAGES val:33 [ 33.614440] BUG: Bad rss-counter state mm:00000000b541ce9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6286' (ECDSA) to the list of known hosts. 2023/06/20 15:24:03 fuzzer started 2023/06/20 15:24:03 dialing manager at localhost:36067 2023/06/20 15:24:03 checking machine... 2023/06/20 15:24:03 checking revisions... [ 34.361714] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:24:03 testing simple program... [ 34.403364] cgroup: Unknown subsys name 'net' [ 34.453693] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:24:03 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=00007f7cc3d06ace RCX=0000000000000100 RDX=ffff88800e25b680 RSI=ffffffff813a0ac4 RDI=00007f7cc3d06ace RBP=00007f7cc3d06ace RSP=ffff88806ce09a20 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f7cc3d06000 R11=00000000000b6d53 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800e25b680 R15=ffff88800c711a00 RIP=ffffffff814c0880 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7cc3182900 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=00007f7cc25bc580 CR3=000000000d5d6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b03e210669db870d00000000000ae988 XMM05=ea6ce879fcb3275a00000000001335f8 XMM06=806171799158d9670000000000132698 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff81370ce8 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888008e37c80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000001 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff8180f173 RFL=00000083 [--S---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 0000000000000000 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=00007f97a0afe618 CR3=000000000d9a6000 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=34323a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303537 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000