[ 31.287331] BUG: Bad rss-counter state mm:000000001778792f type:MM_FILEPAGES val:33 [ 31.288661] BUG: Bad rss-counter state mm:000000001778792f type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.407173] ================================================================== [ 31.408106] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.409077] Read of size 8 at addr ffff88800f6373f8 by task sshd/219 [ 31.409866] [ 31.410089] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.411089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.412077] Call Trace: [ 31.412401] <TASK> [ 31.412693] dump_stack_lvl+0x91/0xf0 [ 31.413202] print_report+0xcc/0x620 [ 31.413718] ? __virt_addr_valid+0x102/0x340 [ 31.414294] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.414914] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.415532] kasan_report+0xbe/0xf0 [ 31.416018] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.416644] vma_interval_tree_remove+0xc75/0xec0 [ 31.417245] vma_prepare+0xc54/0x11a0 [ 31.417739] __split_vma+0x5af/0x950 [ 31.418220] ? __pfx___split_vma+0x10/0x10 [ 31.418754] ? find_held_lock+0x2c/0x110 [ 31.419291] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.419861] ? lock_is_held_type+0x9f/0x120 [ 31.420417] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.421029] ? mtree_range_walk+0x632/0x900 [ 31.421604] ? mas_walk+0x5c7/0x7c0 [ 31.422083] do_vmi_munmap+0x1f1/0x2b0 [ 31.422595] mmap_region+0x1f9/0x2660 [ 31.423079] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.423597] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.424314] ? __pfx_lock_acquire+0x10/0x10 [ 31.424842] ? __pfx_mmap_region+0x10/0x10 [ 31.425406] ? security_mmap_addr+0x7d/0xa0 [ 31.425947] ? get_unmapped_area+0x1f5/0x3f0 [ 31.426502] do_mmap+0x854/0xf00 [ 31.426945] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.427446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.428017] ksys_mmap_pgoff+0x3af/0x500 [ 31.428540] do_syscall_64+0x3f/0x90 [ 31.429023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429685] RIP: 0033:0x7eff39a00d82 [ 31.430148] 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 [ 31.432273] RSP: 002b:00007ffeacc24c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.433197] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff39a00d82 [ 31.434050] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff38e3a000 [ 31.434895] RBP: 00007eff38e3a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.435748] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564231394d90 [ 31.436599] R13: 00007ffeacc24c60 R14: 00007ffeacc24c90 R15: 00007ffeacc24ff0 [ 31.437493] </TASK> [ 31.437788] [ 31.438006] Allocated by task 212: [ 31.438447] kasan_save_stack+0x22/0x50 [ 31.438954] kasan_set_track+0x25/0x30 [ 31.439461] __kasan_slab_alloc+0x59/0x70 [ 31.439981] kmem_cache_alloc+0x16b/0x370 [ 31.440510] vm_area_dup+0x20/0x160 [ 31.440965] __split_vma+0x170/0x950 [ 31.441448] split_vma+0xc6/0x110 [ 31.441897] mprotect_fixup+0x8d2/0xb30 [ 31.442411] do_mprotect_pkey+0x87e/0xd40 [ 31.442932] __x64_sys_mprotect+0x78/0xc0 [ 31.443466] do_syscall_64+0x3f/0x90 [ 31.443948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.444601] [ 31.444818] Freed by task 203: [ 31.445213] kasan_save_stack+0x22/0x50 [ 31.445734] kasan_set_track+0x25/0x30 [ 31.446233] kasan_save_free_info+0x2b/0x50 [ 31.446765] __kasan_slab_free+0x10a/0x190 [ 31.447300] kmem_cache_free+0x10d/0x4d0 [ 31.447818] rcu_core+0x8c8/0x2860 [ 31.448261] __do_softirq+0x1b7/0x7d4 [ 31.448744] [ 31.448960] Last potentially related work creation: [ 31.449565] kasan_save_stack+0x22/0x50 [ 31.450071] __kasan_record_aux_stack+0x8e/0xa0 [ 31.450649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.451296] remove_vma+0x139/0x170 [ 31.451818] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.452382] do_vmi_munmap+0x1f1/0x2b0 [ 31.452872] __vm_munmap+0x138/0x3a0 [ 31.453354] __x64_sys_munmap+0x59/0x80 [ 31.453852] do_syscall_64+0x3f/0x90 [ 31.454333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.454987] [ 31.455205] The buggy address belongs to the object at ffff88800f6373a0 [ 31.455205] which belongs to the cache vm_area_struct of size 168 [ 31.456668] The buggy address is located 88 bytes inside of [ 31.456668] freed 168-byte region [ffff88800f6373a0, ffff88800f637448) [ 31.458102] [ 31.458324] The buggy address belongs to the physical page: [ 31.458979] page:00000000088daa51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf637 [ 31.460061] memcg:ffff88800e73f601 [ 31.460499] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.461197] page_type: 0xffffffff() [ 31.461656] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.462591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e73f601 [ 31.463502] page dumped because: kasan: bad access detected [ 31.464167] [ 31.464386] Memory state around the buggy address: [ 31.464966] ffff88800f637280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.465853] ffff88800f637300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.466726] >ffff88800f637380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.467572] ^ [ 31.468418] ffff88800f637400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.469269] ffff88800f637480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.470141] ================================================================== [ 31.471054] Disabling lock debugging due to kernel taint [ 33.208217] BUG: Bad rss-counter state mm:00000000812a0ceb type:MM_FILEPAGES val:33 [ 33.208957] BUG: Bad rss-counter state mm:00000000812a0ceb type:MM_ANONPAGES val:22 [ 33.602815] BUG: Bad rss-counter state mm:0000000055d11e3c type:MM_FILEPAGES val:33 [ 33.604163] BUG: Bad rss-counter state mm:0000000055d11e3c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52642' (ECDSA) to the list of known hosts. 2023/06/21 02:16:04 fuzzer started 2023/06/21 02:16:04 dialing manager at localhost:36067 2023/06/21 02:16:04 checking machine... 2023/06/21 02:16:04 checking revisions... [ 34.277073] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:16:04 testing simple program... [ 34.324463] cgroup: Unknown subsys name 'net' [ 34.381190] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:16:04 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=00007f0c7d826230 CR3=000000000d9b8000 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=36313a3230203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343635 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=1ffffffff0c28297 RBX=0000000000000001 RCX=ffffffff861414ba RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880162f7640 RSP=ffff8880162f7578 R8 =ffffffff861414be R9 =ffff8880162f7628 R10=0000000000038001 R11=00000000000223eb R12=ffff8880162f7648 R13=ffff8880162f7630 R14=ffff8880162f7dd0 R15=ffff8880162f75e8 RIP=ffffffff81130b73 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 00007f2a79251900 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=00007ffd3d6f3000 CR3=000000001a0de000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000