[ 28.575109] BUG: Bad rss-counter state mm:00000000b4eb5bc2 type:MM_FILEPAGES val:33 [ 28.576603] BUG: Bad rss-counter state mm:00000000b4eb5bc2 type:MM_ANONPAGES val:22 [ 28.746853] ================================================================== [ 28.747888] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.748924] Read of size 8 at addr ffff888019ee7d08 by task sshd/220 [ 28.749654] [ 28.749860] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.750676] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.751646] Call Trace: [ 28.751953] [ 28.752222] dump_stack_lvl+0x91/0xf0 [ 28.752690] print_report+0xcc/0x620 [ 28.753151] ? __virt_addr_valid+0x102/0x340 [ 28.753681] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.754267] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.754850] kasan_report+0xbe/0xf0 [ 28.755305] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.755916] vma_interval_tree_remove+0xc75/0xec0 [ 28.756489] vma_prepare+0xc54/0x11a0 [ 28.756961] __split_vma+0x5af/0x950 [ 28.757425] ? __pfx___split_vma+0x10/0x10 [ 28.757951] ? find_held_lock+0x2c/0x110 [ 28.758468] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.759023] ? lock_is_held_type+0x9f/0x120 [ 28.759551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.760165] ? mtree_range_walk+0x632/0x900 [ 28.760715] ? mas_walk+0x5c7/0x7c0 [ 28.761184] do_vmi_munmap+0x1f1/0x2b0 [ 28.761672] mmap_region+0x1f9/0x2660 [ 28.762155] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.762659] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.763364] ? __pfx_lock_acquire+0x10/0x10 [ 28.763917] ? __pfx_mmap_region+0x10/0x10 [ 28.764455] ? security_mmap_addr+0x7d/0xa0 [ 28.764986] ? get_unmapped_area+0x1f5/0x3f0 [ 28.765526] do_mmap+0x854/0xf00 [ 28.765960] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.766450] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.767003] ksys_mmap_pgoff+0x3af/0x500 [ 28.767504] do_syscall_64+0x3f/0x90 [ 28.767983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.768635] RIP: 0033:0x7fe6a9f43d82 [ 28.769087] 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 [ 28.771198] RSP: 002b:00007ffe0ca78fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.772107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6a9f43d82 [ 28.772937] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6a937d000 [ 28.773781] RBP: 00007fe6a937d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.774613] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cce9625ec0 [ 28.775432] R13: 00007ffe0ca78fc0 R14: 00007ffe0ca78ff0 R15: 00007ffe0ca79350 [ 28.776288] [ 28.776571] [ 28.776779] Allocated by task 213: [ 28.777196] kasan_save_stack+0x22/0x50 [ 28.777693] kasan_set_track+0x25/0x30 [ 28.778181] __kasan_slab_alloc+0x59/0x70 [ 28.778703] kmem_cache_alloc+0x16b/0x370 [ 28.779209] vm_area_dup+0x20/0x160 [ 28.779673] __split_vma+0x170/0x950 [ 28.780128] split_vma+0xc6/0x110 [ 28.780563] mprotect_fixup+0x8d2/0xb30 [ 28.781063] do_mprotect_pkey+0x87e/0xd40 [ 28.781583] __x64_sys_mprotect+0x78/0xc0 [ 28.782092] do_syscall_64+0x3f/0x90 [ 28.782563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.783209] [ 28.783427] Freed by task 204: [ 28.783825] kasan_save_stack+0x22/0x50 [ 28.784319] kasan_set_track+0x25/0x30 [ 28.784809] kasan_save_free_info+0x2b/0x50 [ 28.785327] __kasan_slab_free+0x10a/0x190 [ 28.785848] kmem_cache_free+0x10d/0x4d0 [ 28.786361] rcu_core+0x8c8/0x2860 [ 28.786791] __do_softirq+0x1b7/0x7d4 [ 28.787266] [ 28.787482] Last potentially related work creation: [ 28.788078] kasan_save_stack+0x22/0x50 [ 28.788566] __kasan_record_aux_stack+0x8e/0xa0 [ 28.789130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.789759] remove_vma+0x139/0x170 [ 28.790292] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.790846] do_vmi_munmap+0x1f1/0x2b0 [ 28.791320] __vm_munmap+0x138/0x3a0 [ 28.791804] __x64_sys_munmap+0x59/0x80 [ 28.792292] do_syscall_64+0x3f/0x90 [ 28.792766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.793399] [ 28.793609] The buggy address belongs to the object at ffff888019ee7cb0 [ 28.793609] which belongs to the cache vm_area_struct of size 168 [ 28.795075] The buggy address is located 88 bytes inside of [ 28.795075] freed 168-byte region [ffff888019ee7cb0, ffff888019ee7d58) [ 28.796494] [ 28.796716] The buggy address belongs to the physical page: [ 28.797367] page:00000000bbef3609 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ee7 [ 28.798455] memcg:ffff8880190f9701 [ 28.798882] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.799519] page_type: 0xffffffff() [ 28.799972] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.800884] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880190f9701 [ 28.801785] page dumped because: kasan: bad access detected [ 28.802431] [ 28.802645] Memory state around the buggy address: [ 28.803215] ffff888019ee7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.804079] ffff888019ee7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.804932] >ffff888019ee7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.805779] ^ [ 28.806215] ffff888019ee7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.807058] ffff888019ee7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.807923] ================================================================== [ 28.808917] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.681377] BUG: Bad rss-counter state mm:00000000fd232a72 type:MM_FILEPAGES val:33 [ 30.682283] BUG: Bad rss-counter state mm:00000000fd232a72 type:MM_ANONPAGES val:22 [ 31.200256] BUG: Bad rss-counter state mm:000000005cc1b78f type:MM_FILEPAGES val:33 [ 31.201778] BUG: Bad rss-counter state mm:000000005cc1b78f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24122' (ECDSA) to the list of known hosts. 2023/06/19 17:48:39 fuzzer started 2023/06/19 17:48:40 dialing manager at localhost:44161 2023/06/19 17:48:40 checking machine... 2023/06/19 17:48:40 checking revisions... [ 31.949593] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:48:40 testing simple program... [ 31.995319] cgroup: Unknown subsys name 'net' [ 32.042983] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:48:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015be3700 RCX=ffffffff812531ec RDX=1ffff11002b7c6ed RSI=0000000000000008 RDI=ffff888015be3768 RBP=ffff888015920080 RSP=ffff888015d1fac8 R8 =0000000000000000 R9 =ffffed1002b7c6d0 R10=ffff888015be3687 R11=0000000000000001 R12=ffff888015920000 R13=0000000000000000 R14=ffff88806ce39500 R15=ffff888015be3680 RIP=ffffffff812532b2 RFL=00000016 [----AP-] 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 00007f568b750700 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=00007f1072f9a020 CR3=0000000019eec000 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=38343a3731203931206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30323434332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303234 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=ffffffff83864d10 RBX=0000000000000009 RCX=ffffffff81378270 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800fbb06c0 RBP=000000000000000a RSP=ffff888008e57d40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=dffffc0000000000 R13=ffff888008e57dc8 R14=ffff88806cf35000 R15=ffff88800fbb06c0 RIP=ffffffff83864d14 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 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=00007ffd1e435000 CR3=000000001b432000 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=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