syzkaller login: [ 30.531099] BUG: Bad rss-counter state mm:00000000f34d1d28 type:MM_FILEPAGES val:33 [ 30.532246] BUG: Bad rss-counter state mm:00000000f34d1d28 type:MM_ANONPAGES val:22 [ 30.696403] ================================================================== [ 30.697301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.698197] Read of size 8 at addr ffff88800ddf7df0 by task sshd/220 [ 30.698947] [ 30.699162] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.700104] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.701056] Call Trace: [ 30.701386] [ 30.701665] dump_stack_lvl+0x91/0xf0 [ 30.702153] print_report+0xcc/0x620 [ 30.702627] ? __virt_addr_valid+0x102/0x340 [ 30.703162] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.703764] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.704365] kasan_report+0xbe/0xf0 [ 30.704827] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.705451] vma_interval_tree_remove+0xc75/0xec0 [ 30.706045] vma_prepare+0xc54/0x11a0 [ 30.706517] __split_vma+0x5af/0x950 [ 30.706979] ? __pfx___split_vma+0x10/0x10 [ 30.707495] ? find_held_lock+0x2c/0x110 [ 30.708003] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.708562] ? lock_is_held_type+0x9f/0x120 [ 30.709101] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.709703] ? mtree_range_walk+0x632/0x900 [ 30.710247] ? mas_walk+0x5c7/0x7c0 [ 30.710713] do_vmi_munmap+0x1f1/0x2b0 [ 30.711201] mmap_region+0x1f9/0x2660 [ 30.711673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.712180] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.712880] ? __pfx_lock_acquire+0x10/0x10 [ 30.713403] ? __pfx_mmap_region+0x10/0x10 [ 30.713929] ? security_mmap_addr+0x7d/0xa0 [ 30.714446] ? get_unmapped_area+0x1f5/0x3f0 [ 30.714982] do_mmap+0x854/0xf00 [ 30.715414] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.715897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.716452] ksys_mmap_pgoff+0x3af/0x500 [ 30.716948] do_syscall_64+0x3f/0x90 [ 30.717434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.718068] RIP: 0033:0x7f7642cfcd82 [ 30.718515] 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 [ 30.720581] RSP: 002b:00007ffda751c788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.721488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7642cfcd82 [ 30.722322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7642136000 [ 30.723154] RBP: 00007f7642136000 R08: 0000000000000009 R09: 0000000000001000 [ 30.723985] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d06c8adec0 [ 30.724815] R13: 00007ffda751c7a0 R14: 00007ffda751c7d0 R15: 00007ffda751cb30 [ 30.725680] [ 30.725968] [ 30.726181] Allocated by task 213: [ 30.726599] kasan_save_stack+0x22/0x50 [ 30.727098] kasan_set_track+0x25/0x30 [ 30.727582] __kasan_slab_alloc+0x59/0x70 [ 30.728094] kmem_cache_alloc+0x16b/0x370 [ 30.728599] vm_area_dup+0x20/0x160 [ 30.729049] __split_vma+0x170/0x950 [ 30.729519] split_vma+0xc6/0x110 [ 30.729947] mprotect_fixup+0x8d2/0xb30 [ 30.730442] do_mprotect_pkey+0x87e/0xd40 [ 30.730944] __x64_sys_mprotect+0x78/0xc0 [ 30.731447] do_syscall_64+0x3f/0x90 [ 30.731905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.732537] [ 30.732746] Freed by task 213: [ 30.733129] kasan_save_stack+0x22/0x50 [ 30.733628] kasan_set_track+0x25/0x30 [ 30.734103] kasan_save_free_info+0x2b/0x50 [ 30.734620] __kasan_slab_free+0x10a/0x190 [ 30.735134] kmem_cache_free+0x10d/0x4d0 [ 30.735627] rcu_core+0x8c8/0x2860 [ 30.736055] __do_softirq+0x1b7/0x7d4 [ 30.736522] [ 30.736731] Last potentially related work creation: [ 30.737314] kasan_save_stack+0x22/0x50 [ 30.737801] __kasan_record_aux_stack+0x8e/0xa0 [ 30.738359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.738982] remove_vma+0x139/0x170 [ 30.739425] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.739964] do_vmi_munmap+0x1f1/0x2b0 [ 30.740444] __vm_munmap+0x138/0x3a0 [ 30.740895] __x64_sys_munmap+0x59/0x80 [ 30.741385] do_syscall_64+0x3f/0x90 [ 30.741846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.742466] [ 30.742674] The buggy address belongs to the object at ffff88800ddf7d98 [ 30.742674] which belongs to the cache vm_area_struct of size 168 [ 30.744087] The buggy address is located 88 bytes inside of [ 30.744087] freed 168-byte region [ffff88800ddf7d98, ffff88800ddf7e40) [ 30.745519] [ 30.745800] The buggy address belongs to the physical page: [ 30.746668] page:0000000098bee27f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddf7 [ 30.748090] memcg:ffff88800e4e1601 [ 30.748656] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.749519] page_type: 0xffffffff() [ 30.750103] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.751325] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4e1601 [ 30.752518] page dumped because: kasan: bad access detected [ 30.753409] [ 30.753691] Memory state around the buggy address: [ 30.754453] ffff88800ddf7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.755578] ffff88800ddf7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.756717] >ffff88800ddf7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.757855] ^ [ 30.758929] ffff88800ddf7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.760053] ffff88800ddf7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.761198] ================================================================== [ 30.762664] Disabling lock debugging due to kernel taint [ 32.751357] BUG: Bad rss-counter state mm:000000003fe25e40 type:MM_FILEPAGES val:33 [ 32.752532] BUG: Bad rss-counter state mm:000000003fe25e40 type:MM_ANONPAGES val:22 [ 33.135368] BUG: Bad rss-counter state mm:00000000c73dc663 type:MM_FILEPAGES val:33 [ 33.136369] BUG: Bad rss-counter state mm:00000000c73dc663 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14617' (ECDSA) to the list of known hosts. 2023/06/21 07:17:24 fuzzer started 2023/06/21 07:17:24 dialing manager at localhost:36067 2023/06/21 07:17:24 checking machine... 2023/06/21 07:17:24 checking revisions... [ 33.832975] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:17:24 testing simple program... [ 33.874542] cgroup: Unknown subsys name 'net' [ 33.909844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:17:24 Registers: info registers vcpu 0 RAX=0000000000000008 RBX=ffffffff85dbd804 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff8880146e79e0 R8 =ffffffff860d8256 R9 =ffff8880146e7ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000212 [----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 00007fa5f09b2900 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=00007f17a0805650 CR3=0000000013abc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=658dfda01a2e0b3800000000000ae988 XMM05=51bd3f50e93acd2900000000001326b0 XMM06=4fda316b135da52b00000000001314a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffeba649478 CR3=000000000cac0000 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=2033323a37313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37313a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000