syzkaller login: [ 62.374561] BUG: Bad rss-counter state mm:00000000122cca85 type:MM_FILEPAGES val:33 [ 62.375852] BUG: Bad rss-counter state mm:00000000122cca85 type:MM_ANONPAGES val:22 [ 62.527891] ================================================================== [ 62.528796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.529824] Read of size 8 at addr ffff88800ccbe228 by task sshd/220 [ 62.530601] [ 62.530818] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.531675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.532671] Call Trace: [ 62.532987] [ 62.533280] dump_stack_lvl+0x91/0xf0 [ 62.533768] print_report+0xcc/0x620 [ 62.534244] ? __virt_addr_valid+0x102/0x340 [ 62.534796] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.535404] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.536017] kasan_report+0xbe/0xf0 [ 62.536491] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.537107] vma_interval_tree_remove+0xc75/0xec0 [ 62.537701] vma_prepare+0xc54/0x11a0 [ 62.538174] __split_vma+0x5af/0x950 [ 62.538653] ? __pfx___split_vma+0x10/0x10 [ 62.539182] ? find_held_lock+0x2c/0x110 [ 62.539701] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.540265] ? lock_is_held_type+0x9f/0x120 [ 62.540802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.541543] ? mtree_range_walk+0x632/0x900 [ 62.542096] ? mas_walk+0x5c7/0x7c0 [ 62.542605] do_vmi_munmap+0x1f1/0x2b0 [ 62.543122] mmap_region+0x1f9/0x2660 [ 62.543619] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.544161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.544909] ? __pfx_lock_acquire+0x10/0x10 [ 62.545471] ? __pfx_mmap_region+0x10/0x10 [ 62.546025] ? security_mmap_addr+0x7d/0xa0 [ 62.546586] ? get_unmapped_area+0x1f5/0x3f0 [ 62.547150] do_mmap+0x854/0xf00 [ 62.547608] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.548116] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.548702] ksys_mmap_pgoff+0x3af/0x500 [ 62.549224] do_syscall_64+0x3f/0x90 [ 62.549718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.550387] RIP: 0033:0x7f6b8a113d82 [ 62.550873] 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 [ 62.553090] RSP: 002b:00007ffd03026dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.554022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b8a113d82 [ 62.554916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b8954d000 [ 62.555807] RBP: 00007f6b8954d000 R08: 0000000000000009 R09: 0000000000001000 [ 62.556696] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640f8560b20 [ 62.557569] R13: 00007ffd03026de0 R14: 00007ffd03026e10 R15: 00007ffd03027170 [ 62.558531] [ 62.558887] [ 62.559153] Allocated by task 213: [ 62.559663] kasan_save_stack+0x22/0x50 [ 62.560258] kasan_set_track+0x25/0x30 [ 62.560831] __kasan_slab_alloc+0x59/0x70 [ 62.561446] kmem_cache_alloc+0x16b/0x370 [ 62.562058] vm_area_dup+0x20/0x160 [ 62.562611] __split_vma+0x170/0x950 [ 62.563165] split_vma+0xc6/0x110 [ 62.563687] mprotect_fixup+0x8d2/0xb30 [ 62.564280] do_mprotect_pkey+0x87e/0xd40 [ 62.564894] __x64_sys_mprotect+0x78/0xc0 [ 62.565508] do_syscall_64+0x3f/0x90 [ 62.566074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.566847] [ 62.567099] Freed by task 213: [ 62.567558] kasan_save_stack+0x22/0x50 [ 62.568147] kasan_set_track+0x25/0x30 [ 62.568734] kasan_save_free_info+0x2b/0x50 [ 62.569367] __kasan_slab_free+0x10a/0x190 [ 62.569992] kmem_cache_free+0x10d/0x4d0 [ 62.570610] rcu_core+0x8c8/0x2860 [ 62.571127] __do_softirq+0x1b7/0x7d4 [ 62.571685] [ 62.571937] Last potentially related work creation: [ 62.572621] kasan_save_stack+0x22/0x50 [ 62.573220] __kasan_record_aux_stack+0x8e/0xa0 [ 62.573903] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.574677] remove_vma+0x139/0x170 [ 62.575198] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.575847] do_vmi_munmap+0x1f1/0x2b0 [ 62.576412] __vm_munmap+0x138/0x3a0 [ 62.576964] __x64_sys_munmap+0x59/0x80 [ 62.577544] do_syscall_64+0x3f/0x90 [ 62.578095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.578861] [ 62.579109] The buggy address belongs to the object at ffff88800ccbe1d0 [ 62.579109] which belongs to the cache vm_area_struct of size 168 [ 62.580830] The buggy address is located 88 bytes inside of [ 62.580830] freed 168-byte region [ffff88800ccbe1d0, ffff88800ccbe278) [ 62.582463] [ 62.582721] The buggy address belongs to the physical page: [ 62.583490] page:0000000025ba4b37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xccbe [ 62.584747] memcg:ffff88800fd81a01 [ 62.585235] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.585991] page_type: 0xffffffff() [ 62.586518] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.587595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd81a01 [ 62.588633] page dumped because: kasan: bad access detected [ 62.589402] [ 62.589650] Memory state around the buggy address: [ 62.590324] ffff88800ccbe100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.591318] ffff88800ccbe180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 62.592307] >ffff88800ccbe200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 62.593302] ^ [ 62.593945] ffff88800ccbe280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 62.594934] ffff88800ccbe300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 62.595911] ================================================================== [ 62.597416] Disabling lock debugging due to kernel taint [ 64.577698] BUG: Bad rss-counter state mm:00000000cea2fea5 type:MM_FILEPAGES val:33 [ 64.578882] BUG: Bad rss-counter state mm:00000000cea2fea5 type:MM_ANONPAGES val:22 [ 64.997750] BUG: Bad rss-counter state mm:000000008afcff92 type:MM_FILEPAGES val:33 [ 64.999036] BUG: Bad rss-counter state mm:000000008afcff92 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30672' (ECDSA) to the list of known hosts. 2023/06/19 14:06:08 fuzzer started 2023/06/19 14:06:08 dialing manager at localhost:44161 2023/06/19 14:06:08 checking machine... 2023/06/19 14:06:08 checking revisions... [ 65.680458] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:06:08 testing simple program... [ 65.729734] cgroup: Unknown subsys name 'net' [ 65.786224] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:06:07 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=00007f09f66adeb0 CR3=000000000f758000 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=2038303a36303a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880103d8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880103d7e01 RSI=ffff8880103d7e58 RDI=ffff88806cf09a60 RBP=ffff8880103d7e58 RSP=ffff88806cf099b8 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008a6be R12=0000000000000008 R13=ffff8880103d0000 R14=ffff8880103d7e58 R15=ffff88806cf09a50 RIP=ffffffff811304ce RFL=00000292 [--S-A--] 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 00007fd47448e900 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=00007fff626d4000 CR3=000000000dfec000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000