[ 24.532954] BUG: Bad rss-counter state mm:00000000377aaa75 type:MM_FILEPAGES val:33 [ 24.533992] BUG: Bad rss-counter state mm:00000000377aaa75 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.696535] ================================================================== [ 24.697467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.698413] Read of size 8 at addr ffff8880164fbdf0 by task sshd/218 [ 24.699185] [ 24.699404] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.700386] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.701379] Call Trace: [ 24.701711] [ 24.701997] dump_stack_lvl+0x91/0xf0 [ 24.702487] print_report+0xcc/0x620 [ 24.702975] ? __virt_addr_valid+0x102/0x340 [ 24.703531] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.704158] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.704781] kasan_report+0xbe/0xf0 [ 24.705286] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.705906] vma_interval_tree_remove+0xc75/0xec0 [ 24.706526] vma_prepare+0xc54/0x11a0 [ 24.707018] __split_vma+0x5af/0x950 [ 24.707501] ? __pfx___split_vma+0x10/0x10 [ 24.708040] ? find_held_lock+0x2c/0x110 [ 24.708570] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.709153] ? lock_is_held_type+0x9f/0x120 [ 24.709711] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.710340] ? mtree_range_walk+0x632/0x900 [ 24.710897] ? mas_walk+0x5c7/0x7c0 [ 24.711381] do_vmi_munmap+0x1f1/0x2b0 [ 24.711887] mmap_region+0x1f9/0x2660 [ 24.712378] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.712896] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.713629] ? __pfx_lock_acquire+0x10/0x10 [ 24.714167] ? __pfx_mmap_region+0x10/0x10 [ 24.714701] ? security_mmap_addr+0x7d/0xa0 [ 24.715231] ? get_unmapped_area+0x1f5/0x3f0 [ 24.715784] do_mmap+0x854/0xf00 [ 24.716225] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.716757] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.717340] ksys_mmap_pgoff+0x3af/0x500 [ 24.717853] do_syscall_64+0x3f/0x90 [ 24.718336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.718989] RIP: 0033:0x7f5d20020d82 [ 24.719455] 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 [ 24.721608] RSP: 002b:00007ffcd5d8bfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.722532] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d20020d82 [ 24.723402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d1f45a000 [ 24.724262] RBP: 00007f5d1f45a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.725116] R10: 0000000000000812 R11: 0000000000000206 R12: 000055794e028ec0 [ 24.725997] R13: 00007ffcd5d8bff0 R14: 00007ffcd5d8c020 R15: 00007ffcd5d8c380 [ 24.726877] [ 24.727177] [ 24.727396] Allocated by task 211: [ 24.727836] kasan_save_stack+0x22/0x50 [ 24.728345] kasan_set_track+0x25/0x30 [ 24.728854] __kasan_slab_alloc+0x59/0x70 [ 24.729388] kmem_cache_alloc+0x16b/0x370 [ 24.729914] vm_area_dup+0x20/0x160 [ 24.730376] __split_vma+0x170/0x950 [ 24.730846] split_vma+0xc6/0x110 [ 24.731303] mprotect_fixup+0x8d2/0xb30 [ 24.731811] do_mprotect_pkey+0x87e/0xd40 [ 24.732331] __x64_sys_mprotect+0x78/0xc0 [ 24.732866] do_syscall_64+0x3f/0x90 [ 24.733364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.734014] [ 24.734234] Freed by task 211: [ 24.734632] kasan_save_stack+0x22/0x50 [ 24.735147] kasan_set_track+0x25/0x30 [ 24.735649] kasan_save_free_info+0x2b/0x50 [ 24.736182] __kasan_slab_free+0x10a/0x190 [ 24.736713] kmem_cache_free+0x10d/0x4d0 [ 24.737255] rcu_core+0x8c8/0x2860 [ 24.737700] __do_softirq+0x1b7/0x7d4 [ 24.738178] [ 24.738393] Last potentially related work creation: [ 24.738992] kasan_save_stack+0x22/0x50 [ 24.739498] __kasan_record_aux_stack+0x8e/0xa0 [ 24.740087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.740736] remove_vma+0x139/0x170 [ 24.741207] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.741769] do_vmi_munmap+0x1f1/0x2b0 [ 24.742270] __vm_munmap+0x138/0x3a0 [ 24.742736] __x64_sys_munmap+0x59/0x80 [ 24.743239] do_syscall_64+0x3f/0x90 [ 24.743714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.744374] [ 24.744593] The buggy address belongs to the object at ffff8880164fbd98 [ 24.744593] which belongs to the cache vm_area_struct of size 168 [ 24.746089] The buggy address is located 88 bytes inside of [ 24.746089] freed 168-byte region [ffff8880164fbd98, ffff8880164fbe40) [ 24.747517] [ 24.747735] The buggy address belongs to the physical page: [ 24.748421] page:000000001af36f41 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164fb [ 24.749537] memcg:ffff888019d03c01 [ 24.749972] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.750634] page_type: 0xffffffff() [ 24.751095] raw: 0100000000000200 ffff88800879fc80 ffffea000036d180 dead000000000006 [ 24.752019] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d03c01 [ 24.752938] page dumped because: kasan: bad access detected [ 24.753623] [ 24.753842] Memory state around the buggy address: [ 24.754428] ffff8880164fbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.755300] ffff8880164fbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.756163] >ffff8880164fbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.757026] ^ [ 24.757859] ffff8880164fbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.758725] ffff8880164fbe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.759582] ================================================================== [ 24.760558] Disabling lock debugging due to kernel taint [ 26.814736] BUG: Bad rss-counter state mm:00000000b443f91a type:MM_FILEPAGES val:33 [ 26.815937] BUG: Bad rss-counter state mm:00000000b443f91a type:MM_ANONPAGES val:22 [ 27.246145] BUG: Bad rss-counter state mm:0000000014259709 type:MM_FILEPAGES val:33 [ 27.247377] BUG: Bad rss-counter state mm:0000000014259709 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63923' (ECDSA) to the list of known hosts. 2023/06/20 00:48:42 fuzzer started 2023/06/20 00:48:42 dialing manager at localhost:44161 2023/06/20 00:48:42 checking machine... 2023/06/20 00:48:42 checking revisions... [ 27.970846] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:48:42 testing simple program... [ 28.023943] cgroup: Unknown subsys name 'net' [ 28.066854] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:48:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f640b53e0e0 CR3=000000000b3dc000 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=3e1a93e04b13b682a549857987ecc023 XMM02=000000000011c6a8eff9b2d0a8fce9cb XMM03=000000000011c7782c67c8bc2e329bc3 XMM04=6372b5f7c262e0be00000000000ae988 XMM05=751b9502027dc0b90000000000133150 XMM06=53f652a968a1b1c80000000000132328 XMM07=e042d86d42eb936e0000000000123820 XMM08=5e344ca5400617aa000000000011c778 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c522 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff110038cce88 RSI=ffffffff8180c522 RDI=ffff88801c6674b0 RBP=ffff88801c667480 RSP=ffff88801c6673e0 R8 =ffffffff860d68fa R9 =ffff88801c667428 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801c6674b0 R13=0000000000000000 R14=ffff88800f413680 R15=0000000000092cc0 RIP=ffffffff84532440 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 00007f20b23e7900 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=00007ffe25a22000 CR3=000000000e67a000 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