syzkaller login: [ 30.486674] BUG: Bad rss-counter state mm:00000000f3a1476c type:MM_FILEPAGES val:33 [ 30.488278] BUG: Bad rss-counter state mm:00000000f3a1476c type:MM_ANONPAGES val:22 [ 30.587580] ================================================================== [ 30.588093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.588608] Read of size 8 at addr ffff88801a1fc058 by task sshd/220 [ 30.589040] [ 30.589159] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.589648] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.590186] Call Trace: [ 30.590363] [ 30.590523] dump_stack_lvl+0x91/0xf0 [ 30.590798] print_report+0xcc/0x620 [ 30.591071] ? __virt_addr_valid+0x102/0x340 [ 30.591376] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591716] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.592064] kasan_report+0xbe/0xf0 [ 30.592330] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.592675] vma_interval_tree_remove+0xc75/0xec0 [ 30.593158] vma_prepare+0xc54/0x11a0 [ 30.593438] __split_vma+0x5af/0x950 [ 30.593771] ? __pfx___split_vma+0x10/0x10 [ 30.594066] ? find_held_lock+0x2c/0x110 [ 30.594359] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.594673] ? lock_is_held_type+0x9f/0x120 [ 30.594971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.595309] ? mtree_range_walk+0x632/0x900 [ 30.595642] ? mas_walk+0x5c7/0x7c0 [ 30.595909] do_vmi_munmap+0x1f1/0x2b0 [ 30.596184] mmap_region+0x1f9/0x2660 [ 30.596451] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.596734] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.597130] ? __pfx_lock_acquire+0x10/0x10 [ 30.597440] ? __pfx_mmap_region+0x10/0x10 [ 30.597731] ? security_mmap_addr+0x7d/0xa0 [ 30.598029] ? get_unmapped_area+0x1f5/0x3f0 [ 30.598335] do_mmap+0x854/0xf00 [ 30.598581] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.598856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.599165] ksys_mmap_pgoff+0x3af/0x500 [ 30.599446] do_syscall_64+0x3f/0x90 [ 30.599711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.600069] RIP: 0033:0x7fe1a7575d82 [ 30.600322] 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 [ 30.601518] RSP: 002b:00007ffc8202cd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.602021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1a7575d82 [ 30.602489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1a69af000 [ 30.602960] RBP: 00007fe1a69af000 R08: 0000000000000009 R09: 0000000000001000 [ 30.603447] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b89a12ec0 [ 30.603929] R13: 00007ffc8202cd50 R14: 00007ffc8202cd80 R15: 00007ffc8202d0e0 [ 30.604427] [ 30.604598] [ 30.604721] Allocated by task 213: [ 30.604968] kasan_save_stack+0x22/0x50 [ 30.605268] kasan_set_track+0x25/0x30 [ 30.605545] __kasan_slab_alloc+0x59/0x70 [ 30.605846] kmem_cache_alloc+0x16b/0x370 [ 30.606142] vm_area_dup+0x20/0x160 [ 30.606407] __split_vma+0x170/0x950 [ 30.606672] split_vma+0xc6/0x110 [ 30.606924] mprotect_fixup+0x8d2/0xb30 [ 30.607205] do_mprotect_pkey+0x87e/0xd40 [ 30.607500] __x64_sys_mprotect+0x78/0xc0 [ 30.607806] do_syscall_64+0x3f/0x90 [ 30.608080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.608450] [ 30.608570] Freed by task 19: [ 30.608790] kasan_save_stack+0x22/0x50 [ 30.609083] kasan_set_track+0x25/0x30 [ 30.609372] kasan_save_free_info+0x2b/0x50 [ 30.609676] __kasan_slab_free+0x10a/0x190 [ 30.609978] kmem_cache_free+0x10d/0x4d0 [ 30.610271] rcu_core+0x8c8/0x2860 [ 30.610521] __do_softirq+0x1b7/0x7d4 [ 30.610793] [ 30.610914] Last potentially related work creation: [ 30.611254] kasan_save_stack+0x22/0x50 [ 30.611542] __kasan_record_aux_stack+0x8e/0xa0 [ 30.611872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.612232] remove_vma+0x139/0x170 [ 30.612491] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.612809] do_vmi_munmap+0x1f1/0x2b0 [ 30.613084] __vm_munmap+0x138/0x3a0 [ 30.613363] __x64_sys_munmap+0x59/0x80 [ 30.613647] do_syscall_64+0x3f/0x90 [ 30.613919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.614291] [ 30.614417] The buggy address belongs to the object at ffff88801a1fc000 [ 30.614417] which belongs to the cache vm_area_struct of size 168 [ 30.615273] The buggy address is located 88 bytes inside of [ 30.615273] freed 168-byte region [ffff88801a1fc000, ffff88801a1fc0a8) [ 30.616089] [ 30.616212] The buggy address belongs to the physical page: [ 30.616597] page:000000009851a8ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1fc [ 30.617245] memcg:ffff8880180b0301 [ 30.617489] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.617864] page_type: 0xffffffff() [ 30.618127] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.618665] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180b0301 [ 30.619196] page dumped because: kasan: bad access detected [ 30.619580] [ 30.619702] Memory state around the buggy address: [ 30.620045] ffff88801a1fbf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.620552] ffff88801a1fbf80: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 30.621060] >ffff88801a1fc000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.621569] ^ [ 30.621990] ffff88801a1fc080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.622483] ffff88801a1fc100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.622977] ================================================================== [ 30.623535] Disabling lock debugging due to kernel taint [ 32.544585] BUG: Bad rss-counter state mm:000000003059d4bd type:MM_FILEPAGES val:33 [ 32.545580] BUG: Bad rss-counter state mm:000000003059d4bd type:MM_ANONPAGES val:22 [ 33.057796] BUG: Bad rss-counter state mm:00000000c5ca1fb4 type:MM_FILEPAGES val:33 [ 33.058834] BUG: Bad rss-counter state mm:00000000c5ca1fb4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60677' (ECDSA) to the list of known hosts. 2023/06/20 17:00:17 fuzzer started 2023/06/20 17:00:18 dialing manager at localhost:36067 2023/06/20 17:00:18 checking machine... 2023/06/20 17:00:18 checking revisions... [ 33.775792] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:00:18 testing simple program... [ 33.834141] cgroup: Unknown subsys name 'net' [ 33.884922] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:00:17 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11001f20eef RCX=0000000000000000 RDX=ffff888015c99b40 RSI=ffffffff8366a4aa RDI=ffff888008fae000 RBP=0000000000000000 RSP=ffff88800f907768 R8 =ffff88800f907720 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800e105b40 R13=00000000ffffffff R14=00000000000128c0 R15=ffff888008fae000 RIP=ffffffff814c0880 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 00007f0703fd8900 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=00007fff5767f000 CR3=000000000d57a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f628a028f60 CR3=000000000d6b6000 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=2037313a30303a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a30303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000