syzkaller login: [ 38.776203] BUG: Bad rss-counter state mm:000000000d824dd7 type:MM_FILEPAGES val:33 [ 38.777671] BUG: Bad rss-counter state mm:000000000d824dd7 type:MM_ANONPAGES val:22 [ 38.939483] ================================================================== [ 38.940572] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.941689] Read of size 8 at addr ffff88800e73d798 by task sshd/220 [ 38.942777] [ 38.943038] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.944057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.945242] Call Trace: [ 38.945623] [ 38.945958] dump_stack_lvl+0x91/0xf0 [ 38.946544] print_report+0xcc/0x620 [ 38.947120] ? __virt_addr_valid+0x102/0x340 [ 38.947793] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.948535] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.949269] kasan_report+0xbe/0xf0 [ 38.949739] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.950362] vma_interval_tree_remove+0xc75/0xec0 [ 38.950955] vma_prepare+0xc54/0x11a0 [ 38.951441] __split_vma+0x5af/0x950 [ 38.951928] ? __pfx___split_vma+0x10/0x10 [ 38.952480] ? find_held_lock+0x2c/0x110 [ 38.953009] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.953579] ? lock_is_held_type+0x9f/0x120 [ 38.954120] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.954729] ? mtree_range_walk+0x632/0x900 [ 38.955286] ? mas_walk+0x5c7/0x7c0 [ 38.955762] do_vmi_munmap+0x1f1/0x2b0 [ 38.956258] mmap_region+0x1f9/0x2660 [ 38.956759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.957277] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.958000] ? __pfx_lock_acquire+0x10/0x10 [ 38.958550] ? __pfx_mmap_region+0x10/0x10 [ 38.959080] ? security_mmap_addr+0x7d/0xa0 [ 38.959619] ? get_unmapped_area+0x1f5/0x3f0 [ 38.960194] do_mmap+0x854/0xf00 [ 38.960649] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.961185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.961753] ksys_mmap_pgoff+0x3af/0x500 [ 38.962304] do_syscall_64+0x3f/0x90 [ 38.962836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963503] RIP: 0033:0x7f6efc8d2d82 [ 38.963975] 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 [ 38.966168] RSP: 002b:00007ffd4fd246d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.967102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6efc8d2d82 [ 38.967992] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6efbd0c000 [ 38.968888] RBP: 00007f6efbd0c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.969770] R10: 0000000000000812 R11: 0000000000000206 R12: 000056324f658f60 [ 38.970635] R13: 00007ffd4fd246f0 R14: 00007ffd4fd24720 R15: 00007ffd4fd24a80 [ 38.971510] [ 38.971812] [ 38.972035] Allocated by task 213: [ 38.972468] kasan_save_stack+0x22/0x50 [ 38.972990] kasan_set_track+0x25/0x30 [ 38.973485] __kasan_slab_alloc+0x59/0x70 [ 38.974021] kmem_cache_alloc+0x16b/0x370 [ 38.974534] vm_area_dup+0x20/0x160 [ 38.974988] __split_vma+0x170/0x950 [ 38.975457] split_vma+0xc6/0x110 [ 38.975902] mprotect_fixup+0x8d2/0xb30 [ 38.976407] do_mprotect_pkey+0x87e/0xd40 [ 38.976939] __x64_sys_mprotect+0x78/0xc0 [ 38.977475] do_syscall_64+0x3f/0x90 [ 38.977963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.978617] [ 38.978833] Freed by task 213: [ 38.979225] kasan_save_stack+0x22/0x50 [ 38.979744] kasan_set_track+0x25/0x30 [ 38.980247] kasan_save_free_info+0x2b/0x50 [ 38.980795] __kasan_slab_free+0x10a/0x190 [ 38.981336] kmem_cache_free+0x10d/0x4d0 [ 38.981854] rcu_core+0x8c8/0x2860 [ 38.982306] __do_softirq+0x1b7/0x7d4 [ 38.982783] [ 38.983002] Last potentially related work creation: [ 38.983723] kasan_save_stack+0x22/0x50 [ 38.984232] __kasan_record_aux_stack+0x8e/0xa0 [ 38.984833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.985491] remove_vma+0x139/0x170 [ 38.985948] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.986520] do_vmi_munmap+0x1f1/0x2b0 [ 38.987014] __vm_munmap+0x138/0x3a0 [ 38.987485] __x64_sys_munmap+0x59/0x80 [ 38.987996] do_syscall_64+0x3f/0x90 [ 38.988480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.989151] [ 38.989376] The buggy address belongs to the object at ffff88800e73d740 [ 38.989376] which belongs to the cache vm_area_struct of size 168 [ 38.990849] The buggy address is located 88 bytes inside of [ 38.990849] freed 168-byte region [ffff88800e73d740, ffff88800e73d7e8) [ 38.992289] [ 38.992507] The buggy address belongs to the physical page: [ 38.993178] page:0000000046d9c358 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe73d [ 38.994281] memcg:ffff88800d525f01 [ 38.994714] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.995373] page_type: 0xffffffff() [ 38.995826] raw: 0100000000000200 ffff8880087a0c80 ffffea000037da80 dead000000000002 [ 38.996784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d525f01 [ 38.997716] page dumped because: kasan: bad access detected [ 38.998394] [ 38.998609] Memory state around the buggy address: [ 38.999196] ffff88800e73d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.000059] ffff88800e73d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.000942] >ffff88800e73d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.001803] ^ [ 39.002316] ffff88800e73d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.003183] ffff88800e73d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.004051] ================================================================== [ 39.005007] Disabling lock debugging due to kernel taint [ 41.710470] BUG: Bad rss-counter state mm:000000008a11a618 type:MM_FILEPAGES val:33 [ 41.711866] BUG: Bad rss-counter state mm:000000008a11a618 type:MM_ANONPAGES val:22 [ 42.125262] BUG: Bad rss-counter state mm:000000006530a68c type:MM_FILEPAGES val:33 [ 42.126274] BUG: Bad rss-counter state mm:000000006530a68c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61394' (ECDSA) to the list of known hosts. 2023/06/21 04:36:01 fuzzer started 2023/06/21 04:36:02 dialing manager at localhost:36067 2023/06/21 04:36:02 checking machine... 2023/06/21 04:36:02 checking revisions... [ 42.865629] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:36:02 testing simple program... [ 42.927924] cgroup: Unknown subsys name 'net' [ 43.019510] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:36:01 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000004 RCX=ffffffff818ea53f RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800c47a580 RBP=0000000000000003 RSP=ffff888015b57930 R8 =0000000000000000 R9 =ffffed100188f4b0 R10=ffff88800c47a583 R11=0000000000000000 R12=ffff88800c47a580 R13=0000000000004000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff818ea56d 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 00007f032b10f700 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=00007f82741f6a80 CR3=000000000c696000 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=f8c04d370cb332b700000000000ae988 XMM05=cc9ea4655162c9c00000000000133220 XMM06=4fda316b135da52b00000000001315c0 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=ffff888008c04400 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=00007ffe6a913000 CR3=00000000195fc000 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=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