syzkaller login: [ 42.725388] BUG: Bad rss-counter state mm:000000000398c4ee type:MM_FILEPAGES val:33 [ 42.726766] BUG: Bad rss-counter state mm:000000000398c4ee type:MM_ANONPAGES val:22 [ 42.754503] ================================================================== [ 42.755317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.756047] Read of size 8 at addr ffff88800fc2b880 by task sshd/219 [ 42.756641] [ 42.756812] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.757476] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.758240] Call Trace: [ 42.758486] [ 42.758704] dump_stack_lvl+0x91/0xf0 [ 42.759082] print_report+0xcc/0x620 [ 42.759459] ? __virt_addr_valid+0x102/0x340 [ 42.759884] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.760362] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.760841] kasan_report+0xbe/0xf0 [ 42.761207] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.761684] vma_interval_tree_remove+0xc75/0xec0 [ 42.762152] vma_prepare+0xc54/0x11a0 [ 42.762523] __split_vma+0x5af/0x950 [ 42.762893] ? __pfx___split_vma+0x10/0x10 [ 42.763295] ? find_held_lock+0x2c/0x110 [ 42.763697] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.764134] ? lock_is_held_type+0x9f/0x120 [ 42.764548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.765020] ? mtree_range_walk+0x632/0x900 [ 42.765445] ? mas_walk+0x5c7/0x7c0 [ 42.765809] do_vmi_munmap+0x1f1/0x2b0 [ 42.766207] mmap_region+0x1f9/0x2660 [ 42.766575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.766973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.767575] ? __pfx_lock_acquire+0x10/0x10 [ 42.767898] ? __pfx_mmap_region+0x10/0x10 [ 42.768211] ? security_mmap_addr+0x7d/0xa0 [ 42.768527] ? get_unmapped_area+0x1f5/0x3f0 [ 42.768856] do_mmap+0x854/0xf00 [ 42.769121] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.769447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.769789] ksys_mmap_pgoff+0x3af/0x500 [ 42.770094] do_syscall_64+0x3f/0x90 [ 42.770386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.770768] RIP: 0033:0x7fdefbecfd82 [ 42.771038] 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 [ 42.772304] RSP: 002b:00007ffc8e677228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.772840] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdefbecfd82 [ 42.773358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdefb309000 [ 42.773866] RBP: 00007fdefb309000 R08: 0000000000000009 R09: 0000000000001000 [ 42.774382] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e77fb9d90 [ 42.774890] R13: 00007ffc8e677240 R14: 00007ffc8e677270 R15: 00007ffc8e6775d0 [ 42.775402] [ 42.775571] [ 42.775696] Allocated by task 212: [ 42.775955] kasan_save_stack+0x22/0x50 [ 42.776255] kasan_set_track+0x25/0x30 [ 42.776544] __kasan_slab_alloc+0x59/0x70 [ 42.776847] kmem_cache_alloc+0x16b/0x370 [ 42.777144] vm_area_dup+0x20/0x160 [ 42.777413] __split_vma+0x170/0x950 [ 42.777694] split_vma+0xc6/0x110 [ 42.777955] mprotect_fixup+0x8d2/0xb30 [ 42.778253] do_mprotect_pkey+0x87e/0xd40 [ 42.778560] __x64_sys_mprotect+0x78/0xc0 [ 42.778861] do_syscall_64+0x3f/0x90 [ 42.779141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.779511] [ 42.779638] Freed by task 212: [ 42.779864] kasan_save_stack+0x22/0x50 [ 42.780155] kasan_set_track+0x25/0x30 [ 42.780453] kasan_save_free_info+0x2b/0x50 [ 42.780771] __kasan_slab_free+0x10a/0x190 [ 42.781081] kmem_cache_free+0x10d/0x4d0 [ 42.781383] rcu_core+0x8c8/0x2860 [ 42.781648] __do_softirq+0x1b7/0x7d4 [ 42.781929] [ 42.782054] Last potentially related work creation: [ 42.782409] kasan_save_stack+0x22/0x50 [ 42.782713] __kasan_record_aux_stack+0x8e/0xa0 [ 42.783063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.783446] remove_vma+0x139/0x170 [ 42.783711] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.784045] do_vmi_munmap+0x1f1/0x2b0 [ 42.784326] __vm_munmap+0x138/0x3a0 [ 42.784596] __x64_sys_munmap+0x59/0x80 [ 42.784889] do_syscall_64+0x3f/0x90 [ 42.785167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.785547] [ 42.785671] The buggy address belongs to the object at ffff88800fc2b828 [ 42.785671] which belongs to the cache vm_area_struct of size 168 [ 42.786560] The buggy address is located 88 bytes inside of [ 42.786560] freed 168-byte region [ffff88800fc2b828, ffff88800fc2b8d0) [ 42.787399] [ 42.787523] The buggy address belongs to the physical page: [ 42.787918] page:00000000633ba225 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc2b [ 42.788573] memcg:ffff88800eba6301 [ 42.788821] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.789212] page_type: 0xffffffff() [ 42.789474] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.790023] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eba6301 [ 42.790564] page dumped because: kasan: bad access detected [ 42.790943] [ 42.791068] Memory state around the buggy address: [ 42.791416] ffff88800fc2b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 42.791928] ffff88800fc2b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.792441] >ffff88800fc2b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.792953] ^ [ 42.793198] ffff88800fc2b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.793708] ffff88800fc2b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 42.794218] ================================================================== [ 42.794823] Disabling lock debugging due to kernel taint [ 45.145814] BUG: Bad rss-counter state mm:00000000ca69fdbf type:MM_FILEPAGES val:33 [ 45.146950] BUG: Bad rss-counter state mm:00000000ca69fdbf type:MM_ANONPAGES val:22 [ 45.673781] BUG: Bad rss-counter state mm:0000000088ba270f type:MM_FILEPAGES val:33 [ 45.674853] BUG: Bad rss-counter state mm:0000000088ba270f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50462' (ECDSA) to the list of known hosts. 2023/06/20 00:55:07 fuzzer started 2023/06/20 00:55:07 dialing manager at localhost:44161 2023/06/20 00:55:07 checking machine... 2023/06/20 00:55:07 checking revisions... [ 46.394574] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:55:08 testing simple program... [ 46.452482] cgroup: Unknown subsys name 'net' [ 46.505431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:54:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed1002c89f5a RSP=ffff88801644fac0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88806ce39518 R13=ffffffff8124d042 R14=ffff88800ef31b54 R15=ffff88806ce39500 RIP=ffffffff812d8a03 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 00007f514ec36700 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=00007fff11de2668 CR3=000000000ee1a000 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=35353a3030203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383836 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=ffff888015d0d1c0 RBX=ffff888019d375e0 RCX=ffffffff81132ffe RDX=ffff888019d374f8 RSI=0000000000000000 RDI=ffff888019d375b8 RBP=ffff888015d0d1c0 RSP=ffff888019d374f8 R8 =0000000000004000 R9 =0000000000000000 R10=ffff888019d37548 R11=00000000000b6996 R12=0000000000000000 R13=ffff888019d37570 R14=ffff888019d37590 R15=ffff888019d37548 RIP=ffffffff81133010 RFL=00000246 [---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 00007fbd33c4c900 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=00007fbd34203618 CR3=000000000ea5e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000