[ 27.588468] BUG: Bad rss-counter state mm:00000000d2784cf4 type:MM_FILEPAGES val:33 [ 27.589671] BUG: Bad rss-counter state mm:00000000d2784cf4 type:MM_ANONPAGES val:22 [ 27.748478] ================================================================== [ 27.749604] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.750773] Read of size 8 at addr ffff88800d95fb38 by task sshd/219 [ 27.751817] [ 27.752047] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.752963] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.754024] Call Trace: [ 27.754364] [ 27.754664] dump_stack_lvl+0x91/0xf0 [ 27.755198] print_report+0xcc/0x620 [ 27.755721] ? __virt_addr_valid+0x102/0x340 [ 27.756312] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.756983] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.757653] kasan_report+0xbe/0xf0 [ 27.758163] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.758828] vma_interval_tree_remove+0xc75/0xec0 [ 27.759482] vma_prepare+0xc54/0x11a0 [ 27.760004] __split_vma+0x5af/0x950 [ 27.760509] ? __pfx___split_vma+0x10/0x10 [ 27.761077] ? find_held_lock+0x2c/0x110 [ 27.761632] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.762240] ? lock_is_held_type+0x9f/0x120 [ 27.762802] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.763453] ? mtree_range_walk+0x632/0x900 [ 27.764037] ? mas_walk+0x5c7/0x7c0 [ 27.764527] do_vmi_munmap+0x1f1/0x2b0 [ 27.765046] mmap_region+0x1f9/0x2660 [ 27.765545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.766090] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.766861] ? __pfx_lock_acquire+0x10/0x10 [ 27.767454] ? __pfx_mmap_region+0x10/0x10 [ 27.768024] ? security_mmap_addr+0x7d/0xa0 [ 27.768600] ? get_unmapped_area+0x1f5/0x3f0 [ 27.769195] do_mmap+0x854/0xf00 [ 27.769664] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.770188] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.770784] ksys_mmap_pgoff+0x3af/0x500 [ 27.771327] do_syscall_64+0x3f/0x90 [ 27.771824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.772498] RIP: 0033:0x7f45e835fd82 [ 27.772988] 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 [ 27.775302] RSP: 002b:00007ffe5ce0cb98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.776289] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45e835fd82 [ 27.777205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45e7799000 [ 27.778118] RBP: 00007f45e7799000 R08: 0000000000000009 R09: 0000000000001000 [ 27.779043] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac38737ec0 [ 27.779979] R13: 00007ffe5ce0cbb0 R14: 00007ffe5ce0cbe0 R15: 00007ffe5ce0cf40 [ 27.780906] [ 27.781221] [ 27.781448] Allocated by task 212: [ 27.781912] kasan_save_stack+0x22/0x50 [ 27.782451] kasan_set_track+0x25/0x30 [ 27.782978] __kasan_slab_alloc+0x59/0x70 [ 27.783550] kmem_cache_alloc+0x16b/0x370 [ 27.784111] vm_area_dup+0x20/0x160 [ 27.784593] __split_vma+0x170/0x950 [ 27.785090] split_vma+0xc6/0x110 [ 27.785555] mprotect_fixup+0x8d2/0xb30 [ 27.786094] do_mprotect_pkey+0x87e/0xd40 [ 27.786654] __x64_sys_mprotect+0x78/0xc0 [ 27.787215] do_syscall_64+0x3f/0x90 [ 27.787727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.788418] [ 27.788645] Freed by task 19: [ 27.789058] kasan_save_stack+0x22/0x50 [ 27.789602] kasan_set_track+0x25/0x30 [ 27.790132] kasan_save_free_info+0x2b/0x50 [ 27.790694] __kasan_slab_free+0x10a/0x190 [ 27.791288] kmem_cache_free+0x10d/0x4d0 [ 27.791829] rcu_core+0x8c8/0x2860 [ 27.792309] __do_softirq+0x1b7/0x7d4 [ 27.792820] [ 27.793047] Last potentially related work creation: [ 27.793687] kasan_save_stack+0x22/0x50 [ 27.794233] __kasan_record_aux_stack+0x8e/0xa0 [ 27.794850] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.795549] remove_vma+0x139/0x170 [ 27.796036] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.796638] do_vmi_munmap+0x1f1/0x2b0 [ 27.797154] __vm_munmap+0x138/0x3a0 [ 27.797656] __x64_sys_munmap+0x59/0x80 [ 27.798191] do_syscall_64+0x3f/0x90 [ 27.798692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.799389] [ 27.799613] The buggy address belongs to the object at ffff88800d95fae0 [ 27.799613] which belongs to the cache vm_area_struct of size 168 [ 27.801154] The buggy address is located 88 bytes inside of [ 27.801154] freed 168-byte region [ffff88800d95fae0, ffff88800d95fb88) [ 27.802678] [ 27.802912] The buggy address belongs to the physical page: [ 27.803639] page:000000006ac80cb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd95f [ 27.804812] memcg:ffff88800ed03901 [ 27.805267] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.805957] page_type: 0xffffffff() [ 27.806444] raw: 0100000000000200 ffff88800879fc80 ffffea000038a880 dead000000000002 [ 27.807424] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed03901 [ 27.808412] page dumped because: kasan: bad access detected [ 27.809134] [ 27.809362] Memory state around the buggy address: [ 27.809986] ffff88800d95fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.810923] ffff88800d95fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 27.811854] >ffff88800d95fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.812758] ^ [ 27.813422] ffff88800d95fb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 27.814344] ffff88800d95fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 27.815262] ================================================================== [ 27.816550] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.800474] BUG: Bad rss-counter state mm:00000000b1c7f459 type:MM_FILEPAGES val:33 [ 29.801569] BUG: Bad rss-counter state mm:00000000b1c7f459 type:MM_ANONPAGES val:22 [ 30.321446] BUG: Bad rss-counter state mm:000000004780f52f type:MM_FILEPAGES val:33 [ 30.322507] BUG: Bad rss-counter state mm:000000004780f52f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10353' (ECDSA) to the list of known hosts. 2023/06/19 13:58:54 fuzzer started 2023/06/19 13:58:54 dialing manager at localhost:44161 2023/06/19 13:58:54 checking machine... 2023/06/19 13:58:54 checking revisions... [ 31.058636] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:58:55 testing simple program... [ 31.118322] cgroup: Unknown subsys name 'net' [ 31.172713] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:58:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002b16eb4 RSI=ffffffff83644344 RDI=ffff8880158b7610 RBP=ffff8880158b75e0 RSP=ffff8880158b7538 R8 =0000000000000001 R9 =ffff8880158b7588 R10=0000000000038001 R11=000000000008ab54 R12=ffff8880158b7610 R13=0000000000000000 R14=ffff88800d919b40 R15=ffff888009108100 RIP=ffffffff813ad42f RFL=00000286 [--S--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 00007f070a433900 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=00007f956fac3650 CR3=000000000edfc000 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=00000000000000000000000000000000 XMM01=db5de61dc500d3b944426f89faf0f8bb XMM02=eff9b2d0a8fce9cb000000000011dd10 XMM03=2c67c8bc2e329bc3000000000011de38 XMM04=8eb44ba8212d07ba00000000000ae988 XMM05=1732d9e6a0a666d00000000000134de8 XMM06=5b2063c3e9eeaceb0000000000133548 XMM07=fb795ef6d65770560000000000123d38 XMM08=2c67c8bc2e329bc3000000000011de38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffeee371558 CR3=0000000019e1c000 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=38353a3331203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343930 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000