syzkaller login: [ 31.289032] BUG: Bad rss-counter state mm:00000000d038d6c1 type:MM_FILEPAGES val:33 [ 31.290225] BUG: Bad rss-counter state mm:00000000d038d6c1 type:MM_ANONPAGES val:22 [ 31.424320] ================================================================== [ 31.425227] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.426179] Read of size 8 at addr ffff88800f2155c8 by task sshd/221 [ 31.426951] [ 31.427173] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.428144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.429124] Call Trace: [ 31.429444] [ 31.429728] dump_stack_lvl+0x91/0xf0 [ 31.430232] print_report+0xcc/0x620 [ 31.430728] ? __virt_addr_valid+0x102/0x340 [ 31.431279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.431924] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.432548] kasan_report+0xbe/0xf0 [ 31.433031] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.433661] vma_interval_tree_remove+0xc75/0xec0 [ 31.434272] vma_prepare+0xc54/0x11a0 [ 31.434749] __split_vma+0x5af/0x950 [ 31.435218] ? __pfx___split_vma+0x10/0x10 [ 31.435743] ? find_held_lock+0x2c/0x110 [ 31.436297] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.436862] ? lock_is_held_type+0x9f/0x120 [ 31.437408] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.438014] ? mtree_range_walk+0x632/0x900 [ 31.438566] ? mas_walk+0x5c7/0x7c0 [ 31.439045] do_vmi_munmap+0x1f1/0x2b0 [ 31.439534] mmap_region+0x1f9/0x2660 [ 31.440036] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.440544] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.441254] ? __pfx_lock_acquire+0x10/0x10 [ 31.441781] ? __pfx_mmap_region+0x10/0x10 [ 31.442307] ? security_mmap_addr+0x7d/0xa0 [ 31.442832] ? get_unmapped_area+0x1f5/0x3f0 [ 31.443375] do_mmap+0x854/0xf00 [ 31.443815] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.444316] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.444873] ksys_mmap_pgoff+0x3af/0x500 [ 31.445375] do_syscall_64+0x3f/0x90 [ 31.445858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.446509] RIP: 0033:0x7fb7483b9d82 [ 31.446966] 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 [ 31.449126] RSP: 002b:00007ffc7d6a6858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.450044] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7483b9d82 [ 31.450895] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7477f3000 [ 31.451749] RBP: 00007fb7477f3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.452618] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559917e82ec0 [ 31.453474] R13: 00007ffc7d6a6870 R14: 00007ffc7d6a68a0 R15: 00007ffc7d6a6c00 [ 31.454342] [ 31.454637] [ 31.454851] Allocated by task 214: [ 31.455290] kasan_save_stack+0x22/0x50 [ 31.455809] kasan_set_track+0x25/0x30 [ 31.456311] __kasan_slab_alloc+0x59/0x70 [ 31.456840] kmem_cache_alloc+0x16b/0x370 [ 31.457368] vm_area_dup+0x20/0x160 [ 31.457829] __split_vma+0x170/0x950 [ 31.458293] split_vma+0xc6/0x110 [ 31.458739] mprotect_fixup+0x8d2/0xb30 [ 31.459251] do_mprotect_pkey+0x87e/0xd40 [ 31.459784] __x64_sys_mprotect+0x78/0xc0 [ 31.460327] do_syscall_64+0x3f/0x90 [ 31.460801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.461444] [ 31.461659] Freed by task 214: [ 31.462059] kasan_save_stack+0x22/0x50 [ 31.462570] kasan_set_track+0x25/0x30 [ 31.463078] kasan_save_free_info+0x2b/0x50 [ 31.463624] __kasan_slab_free+0x10a/0x190 [ 31.464161] kmem_cache_free+0x10d/0x4d0 [ 31.464671] rcu_core+0x8c8/0x2860 [ 31.465120] __do_softirq+0x1b7/0x7d4 [ 31.465604] [ 31.465819] Last potentially related work creation: [ 31.466423] kasan_save_stack+0x22/0x50 [ 31.466935] __kasan_record_aux_stack+0x8e/0xa0 [ 31.467522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.468199] remove_vma+0x139/0x170 [ 31.468652] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.469204] do_vmi_munmap+0x1f1/0x2b0 [ 31.469700] __vm_munmap+0x138/0x3a0 [ 31.470169] __x64_sys_munmap+0x59/0x80 [ 31.470674] do_syscall_64+0x3f/0x90 [ 31.471150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.471798] [ 31.472020] The buggy address belongs to the object at ffff88800f215570 [ 31.472020] which belongs to the cache vm_area_struct of size 168 [ 31.473499] The buggy address is located 88 bytes inside of [ 31.473499] freed 168-byte region [ffff88800f215570, ffff88800f215618) [ 31.474916] [ 31.475139] The buggy address belongs to the physical page: [ 31.475811] page:00000000abe7c69d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf215 [ 31.476901] memcg:ffff88801800f201 [ 31.477333] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.477977] page_type: 0xffffffff() [ 31.478437] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.479372] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801800f201 [ 31.480298] page dumped because: kasan: bad access detected [ 31.480968] [ 31.481182] Memory state around the buggy address: [ 31.481774] ffff88800f215480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.482632] ffff88800f215500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.483504] >ffff88800f215580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.484371] ^ [ 31.485045] ffff88800f215600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.485905] ffff88800f215680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.486755] ================================================================== [ 31.487729] Disabling lock debugging due to kernel taint [ 33.433599] BUG: Bad rss-counter state mm:00000000c568cf79 type:MM_FILEPAGES val:33 [ 33.434894] BUG: Bad rss-counter state mm:00000000c568cf79 type:MM_ANONPAGES val:22 [ 33.897852] BUG: Bad rss-counter state mm:00000000409b66af type:MM_FILEPAGES val:33 [ 33.899100] BUG: Bad rss-counter state mm:00000000409b66af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4518' (ECDSA) to the list of known hosts. 2023/06/20 05:32:14 fuzzer started 2023/06/20 05:32:14 dialing manager at localhost:44161 2023/06/20 05:32:14 checking machine... 2023/06/20 05:32:14 checking revisions... [ 34.597015] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:32:14 testing simple program... [ 34.642200] cgroup: Unknown subsys name 'net' [ 34.697700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:32:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fec7b18 RCX=0000000000000001 RDX=1ffff11001fd8e8c RSI=ffff88800fec7ae8 RDI=ffff88800fec7460 RBP=ffff888008f7f000 RSP=ffff88800fec73e8 R8 =0000000000000001 R9 =ffff88800fec7498 R10=0000000000038001 R11=0000000000014ab3 R12=ffff88800fec74b8 R13=ffff88800fec74a0 R14=ffff88800fec7ae8 R15=ffff88800fec7458 RIP=ffffffff81131c83 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 00007f9d10cf3900 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=00007ffdfc7c9000 CR3=000000000def4000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fda2ee1e8a0 CR3=000000001817a000 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=2034313a32333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a32333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000