syzkaller login: [ 38.778789] BUG: Bad rss-counter state mm:0000000038b52eb5 type:MM_FILEPAGES val:33 [ 38.780224] BUG: Bad rss-counter state mm:0000000038b52eb5 type:MM_ANONPAGES val:22 [ 38.946085] ================================================================== [ 38.947052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.948066] Read of size 8 at addr ffff88800f21c228 by task sshd/218 [ 38.949018] [ 38.949250] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.950207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.951244] Call Trace: [ 38.951599] [ 38.951902] dump_stack_lvl+0x91/0xf0 [ 38.952444] print_report+0xcc/0x620 [ 38.952980] ? __virt_addr_valid+0x102/0x340 [ 38.953609] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954285] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954958] kasan_report+0xbe/0xf0 [ 38.955473] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.956163] vma_interval_tree_remove+0xc75/0xec0 [ 38.956823] vma_prepare+0xc54/0x11a0 [ 38.957351] __split_vma+0x5af/0x950 [ 38.957883] ? __pfx___split_vma+0x10/0x10 [ 38.958460] ? find_held_lock+0x2c/0x110 [ 38.959029] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.959643] ? lock_is_held_type+0x9f/0x120 [ 38.960228] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.960892] ? mtree_range_walk+0x632/0x900 [ 38.961480] ? mas_walk+0x5c7/0x7c0 [ 38.962017] do_vmi_munmap+0x1f1/0x2b0 [ 38.962559] mmap_region+0x1f9/0x2660 [ 38.963090] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.963652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.964421] ? __pfx_lock_acquire+0x10/0x10 [ 38.965001] ? __pfx_mmap_region+0x10/0x10 [ 38.965606] ? security_mmap_addr+0x7d/0xa0 [ 38.966180] ? get_unmapped_area+0x1f5/0x3f0 [ 38.966784] do_mmap+0x854/0xf00 [ 38.967270] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.967816] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.968445] ksys_mmap_pgoff+0x3af/0x500 [ 38.969028] do_syscall_64+0x3f/0x90 [ 38.969570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.970314] RIP: 0033:0x7f491cf9ad82 [ 38.970824] 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 [ 38.973215] RSP: 002b:00007ffde133a838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.974241] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f491cf9ad82 [ 38.975216] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f491c3d4000 [ 38.976165] RBP: 00007f491c3d4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.977135] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdbdcedf70 [ 38.978096] R13: 00007ffde133a850 R14: 00007ffde133a880 R15: 00007ffde133abe0 [ 38.979066] [ 38.979392] [ 38.979643] Allocated by task 211: [ 38.980124] kasan_save_stack+0x22/0x50 [ 38.980687] kasan_set_track+0x25/0x30 [ 38.981246] __kasan_slab_alloc+0x59/0x70 [ 38.981865] kmem_cache_alloc+0x16b/0x370 [ 38.982443] vm_area_dup+0x20/0x160 [ 38.982927] __split_vma+0x170/0x950 [ 38.983438] split_vma+0xc6/0x110 [ 38.983927] mprotect_fixup+0x8d2/0xb30 [ 38.984494] do_mprotect_pkey+0x87e/0xd40 [ 38.985070] __x64_sys_mprotect+0x78/0xc0 [ 38.985682] do_syscall_64+0x3f/0x90 [ 38.986208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.986928] [ 38.987194] Freed by task 211: [ 38.987634] kasan_save_stack+0x22/0x50 [ 38.988213] kasan_set_track+0x25/0x30 [ 38.988778] kasan_save_free_info+0x2b/0x50 [ 38.989386] __kasan_slab_free+0x10a/0x190 [ 38.990062] kmem_cache_free+0x10d/0x4d0 [ 38.990648] rcu_core+0x8c8/0x2860 [ 38.991153] __do_softirq+0x1b7/0x7d4 [ 38.991695] [ 38.991938] Last potentially related work creation: [ 38.992598] kasan_save_stack+0x22/0x50 [ 38.993169] __kasan_record_aux_stack+0x8e/0xa0 [ 38.993844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.994580] remove_vma+0x139/0x170 [ 38.995096] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.995728] do_vmi_munmap+0x1f1/0x2b0 [ 38.996271] __vm_munmap+0x138/0x3a0 [ 38.996798] __x64_sys_munmap+0x59/0x80 [ 38.997365] do_syscall_64+0x3f/0x90 [ 38.997918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.998649] [ 38.998889] The buggy address belongs to the object at ffff88800f21c1d0 [ 38.998889] which belongs to the cache vm_area_struct of size 168 [ 39.000546] The buggy address is located 88 bytes inside of [ 39.000546] freed 168-byte region [ffff88800f21c1d0, ffff88800f21c278) [ 39.002153] [ 39.002402] The buggy address belongs to the physical page: [ 39.003155] page:00000000dfed192c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf21c [ 39.004359] memcg:ffff88800e485401 [ 39.004841] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.005587] page_type: 0xffffffff() [ 39.006102] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.007146] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e485401 [ 39.008172] page dumped because: kasan: bad access detected [ 39.008915] [ 39.009176] Memory state around the buggy address: [ 39.009856] ffff88800f21c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.010822] ffff88800f21c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.011791] >ffff88800f21c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.012744] ^ [ 39.013373] ffff88800f21c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.014365] ffff88800f21c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.015329] ================================================================== [ 39.016363] Disabling lock debugging due to kernel taint [ 41.219450] BUG: Bad rss-counter state mm:00000000f95b01ac type:MM_FILEPAGES val:33 [ 41.220685] BUG: Bad rss-counter state mm:00000000f95b01ac type:MM_ANONPAGES val:22 [ 41.711759] BUG: Bad rss-counter state mm:000000006a7d35de type:MM_FILEPAGES val:33 [ 41.713031] BUG: Bad rss-counter state mm:000000006a7d35de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30716' (ECDSA) to the list of known hosts. 2023/06/19 22:51:14 fuzzer started 2023/06/19 22:51:14 dialing manager at localhost:44161 2023/06/19 22:51:14 checking machine... 2023/06/19 22:51:14 checking revisions... [ 42.304833] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:51:14 testing simple program... [ 42.356359] cgroup: Unknown subsys name 'net' [ 42.410442] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:51:14 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=00007ffc2db16e28 CR3=0000000005482000 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=00007f58e3d6b510000055d628959790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85616740 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff888008d87cf8 RBP=1ffff110011b0f9b RSP=ffff888008d87cd0 R8 =0000000000000001 R9 =ffffed10011b0f9f R10=0000000000000003 R11=0000000000000000 R12=ffffffff85616748 R13=ffffffff85616750 R14=0000000000000000 R15=ffff888008d71b40 RIP=ffffffff812e00f6 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 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=00007fa95222a650 CR3=000000000c7aa000 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=2034313a31353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a31353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000