syzkaller login: [ 38.786709] BUG: Bad rss-counter state mm:0000000091df5985 type:MM_FILEPAGES val:33 [ 38.788314] BUG: Bad rss-counter state mm:0000000091df5985 type:MM_ANONPAGES val:22 [ 38.962775] ================================================================== [ 38.963890] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.965198] Read of size 8 at addr ffff888014797b38 by task sshd/221 [ 38.966100] [ 38.966370] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.967451] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.968479] Call Trace: [ 38.968783] [ 38.969052] dump_stack_lvl+0x91/0xf0 [ 38.969535] print_report+0xcc/0x620 [ 38.969996] ? __virt_addr_valid+0x102/0x340 [ 38.970549] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971157] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.971757] kasan_report+0xbe/0xf0 [ 38.972246] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.972875] vma_interval_tree_remove+0xc75/0xec0 [ 38.973492] vma_prepare+0xc54/0x11a0 [ 38.973971] __split_vma+0x5af/0x950 [ 38.974477] ? __pfx___split_vma+0x10/0x10 [ 38.975039] ? find_held_lock+0x2c/0x110 [ 38.975572] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.976132] ? lock_is_held_type+0x9f/0x120 [ 38.976679] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.977289] ? mtree_range_walk+0x632/0x900 [ 38.977852] ? mas_walk+0x5c7/0x7c0 [ 38.978344] do_vmi_munmap+0x1f1/0x2b0 [ 38.978850] mmap_region+0x1f9/0x2660 [ 38.979370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.979878] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.980585] ? __pfx_lock_acquire+0x10/0x10 [ 38.981109] ? __pfx_mmap_region+0x10/0x10 [ 38.981646] ? security_mmap_addr+0x7d/0xa0 [ 38.982186] ? get_unmapped_area+0x1f5/0x3f0 [ 38.982736] do_mmap+0x854/0xf00 [ 38.983203] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.983705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.984295] ksys_mmap_pgoff+0x3af/0x500 [ 38.984803] do_syscall_64+0x3f/0x90 [ 38.985296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.985948] RIP: 0033:0x7f47b10bbd82 [ 38.986420] 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 [ 38.988610] RSP: 002b:00007ffc7c759d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.989523] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47b10bbd82 [ 38.990380] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47b04f5000 [ 38.991271] RBP: 00007f47b04f5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.992117] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c52e32f60 [ 38.992964] R13: 00007ffc7c759d20 R14: 00007ffc7c759d50 R15: 00007ffc7c75a0b0 [ 38.993850] [ 38.994149] [ 38.994378] Allocated by task 214: [ 38.994822] kasan_save_stack+0x22/0x50 [ 38.995345] kasan_set_track+0x25/0x30 [ 38.995835] __kasan_slab_alloc+0x59/0x70 [ 38.996371] kmem_cache_alloc+0x16b/0x370 [ 38.996886] vm_area_dup+0x20/0x160 [ 38.997367] __split_vma+0x170/0x950 [ 38.997831] split_vma+0xc6/0x110 [ 38.998303] mprotect_fixup+0x8d2/0xb30 [ 38.998809] do_mprotect_pkey+0x87e/0xd40 [ 38.999351] __x64_sys_mprotect+0x78/0xc0 [ 38.999867] do_syscall_64+0x3f/0x90 [ 39.000351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.000992] [ 39.001221] Freed by task 204: [ 39.001602] kasan_save_stack+0x22/0x50 [ 39.002108] kasan_set_track+0x25/0x30 [ 39.002627] kasan_save_free_info+0x2b/0x50 [ 39.003204] __kasan_slab_free+0x10a/0x190 [ 39.003745] kmem_cache_free+0x10d/0x4d0 [ 39.004274] rcu_core+0x8c8/0x2860 [ 39.004715] __do_softirq+0x1b7/0x7d4 [ 39.005222] [ 39.005429] Last potentially related work creation: [ 39.006042] kasan_save_stack+0x22/0x50 [ 39.006573] __kasan_record_aux_stack+0x8e/0xa0 [ 39.007165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.007807] remove_vma+0x139/0x170 [ 39.008269] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.009033] do_vmi_munmap+0x1f1/0x2b0 [ 39.009701] __vm_munmap+0x138/0x3a0 [ 39.010346] __x64_sys_munmap+0x59/0x80 [ 39.011053] do_syscall_64+0x3f/0x90 [ 39.011693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.012551] [ 39.012838] Second to last potentially related work creation: [ 39.013758] kasan_save_stack+0x22/0x50 [ 39.014360] __kasan_record_aux_stack+0x8e/0xa0 [ 39.014936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.015716] remove_vma+0x139/0x170 [ 39.016173] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.016754] do_vmi_munmap+0x1f1/0x2b0 [ 39.017280] mmap_region+0x1f9/0x2660 [ 39.017862] do_mmap+0x854/0xf00 [ 39.018312] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.018822] ksys_mmap_pgoff+0x3af/0x500 [ 39.019341] do_syscall_64+0x3f/0x90 [ 39.019818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.020462] [ 39.020680] The buggy address belongs to the object at ffff888014797ae0 [ 39.020680] which belongs to the cache vm_area_struct of size 168 [ 39.022169] The buggy address is located 88 bytes inside of [ 39.022169] freed 168-byte region [ffff888014797ae0, ffff888014797b88) [ 39.023587] [ 39.023793] The buggy address belongs to the physical page: [ 39.024426] page:0000000060c2f110 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14797 [ 39.025481] memcg:ffff88800dd70201 [ 39.025888] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.026530] page_type: 0xffffffff() [ 39.026980] raw: 0100000000000200 ffff8880087a0c80 ffffea000037da40 0000000000000004 [ 39.027866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd70201 [ 39.028737] page dumped because: kasan: bad access detected [ 39.029370] [ 39.029576] Memory state around the buggy address: [ 39.030120] ffff888014797a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.030971] ffff888014797a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.031817] >ffff888014797b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.032637] ^ [ 39.033229] ffff888014797b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.034051] ffff888014797c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.034898] ================================================================== [ 39.035809] Disabling lock debugging due to kernel taint [ 41.231676] BUG: Bad rss-counter state mm:00000000b09e578e type:MM_FILEPAGES val:33 [ 41.232977] BUG: Bad rss-counter state mm:00000000b09e578e type:MM_ANONPAGES val:22 [ 41.756822] BUG: Bad rss-counter state mm:000000007358f8cc type:MM_FILEPAGES val:33 [ 41.758058] BUG: Bad rss-counter state mm:000000007358f8cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42311' (ECDSA) to the list of known hosts. 2023/06/20 16:50:52 fuzzer started 2023/06/20 16:50:52 dialing manager at localhost:36067 2023/06/20 16:50:52 checking machine... 2023/06/20 16:50:52 checking revisions... [ 42.446089] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:50:52 testing simple program... [ 42.499936] cgroup: Unknown subsys name 'net' [ 42.559671] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:50:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f8d942bc9f0 CR3=000000001023e000 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=30353a3631203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323336 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff1100d9e1358 RSI=ffff8880183b7d60 RDI=ffff88806cf09ac0 RBP=ffff88801b048b80 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008b06b R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff8880183b7d60 R15=ffff88806cf09a70 RIP=ffffffff81131252 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 00007f625b551900 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=00007ffd73585000 CR3=0000000019e66000 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