syzkaller login: [ 33.790415] BUG: Bad rss-counter state mm:00000000a9988c16 type:MM_FILEPAGES val:33 [ 33.791432] BUG: Bad rss-counter state mm:00000000a9988c16 type:MM_ANONPAGES val:22 [ 33.952782] ================================================================== [ 33.953695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.954680] Read of size 8 at addr ffff88800f763c20 by task sshd/220 [ 33.955463] [ 33.955681] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.956680] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.957691] Call Trace: [ 33.958022] [ 33.958314] dump_stack_lvl+0x91/0xf0 [ 33.958830] print_report+0xcc/0x620 [ 33.959319] ? __virt_addr_valid+0x102/0x340 [ 33.959884] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.960515] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.961133] kasan_report+0xbe/0xf0 [ 33.961616] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.962270] vma_interval_tree_remove+0xc75/0xec0 [ 33.962873] vma_prepare+0xc54/0x11a0 [ 33.963354] __split_vma+0x5af/0x950 [ 33.963825] ? __pfx___split_vma+0x10/0x10 [ 33.964355] ? find_held_lock+0x2c/0x110 [ 33.964889] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.965453] ? lock_is_held_type+0x9f/0x120 [ 33.966021] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.966638] ? mtree_range_walk+0x632/0x900 [ 33.967193] ? mas_walk+0x5c7/0x7c0 [ 33.967679] do_vmi_munmap+0x1f1/0x2b0 [ 33.968173] mmap_region+0x1f9/0x2660 [ 33.968661] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.969171] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.969907] ? __pfx_lock_acquire+0x10/0x10 [ 33.970446] ? __pfx_mmap_region+0x10/0x10 [ 33.970983] ? security_mmap_addr+0x7d/0xa0 [ 33.971517] ? get_unmapped_area+0x1f5/0x3f0 [ 33.972085] do_mmap+0x854/0xf00 [ 33.972529] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.973038] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.973604] ksys_mmap_pgoff+0x3af/0x500 [ 33.974143] do_syscall_64+0x3f/0x90 [ 33.974620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.975273] RIP: 0033:0x7f9cbd9e7d82 [ 33.975734] 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 [ 33.977860] RSP: 002b:00007ffd9e24d768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.978782] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cbd9e7d82 [ 33.979639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9cbce21000 [ 33.980500] RBP: 00007f9cbce21000 R08: 0000000000000009 R09: 0000000000001000 [ 33.981349] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632c9bcfec0 [ 33.982214] R13: 00007ffd9e24d780 R14: 00007ffd9e24d7b0 R15: 00007ffd9e24db10 [ 33.983090] [ 33.983385] [ 33.983599] Allocated by task 213: [ 33.984036] kasan_save_stack+0x22/0x50 [ 33.984551] kasan_set_track+0x25/0x30 [ 33.985058] __kasan_slab_alloc+0x59/0x70 [ 33.985587] kmem_cache_alloc+0x16b/0x370 [ 33.986121] vm_area_dup+0x20/0x160 [ 33.986579] __split_vma+0x170/0x950 [ 33.987054] split_vma+0xc6/0x110 [ 33.987504] mprotect_fixup+0x8d2/0xb30 [ 33.988008] do_mprotect_pkey+0x87e/0xd40 [ 33.988541] __x64_sys_mprotect+0x78/0xc0 [ 33.989075] do_syscall_64+0x3f/0x90 [ 33.989552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.990226] [ 33.990447] Freed by task 213: [ 33.990840] kasan_save_stack+0x22/0x50 [ 33.991347] kasan_set_track+0x25/0x30 [ 33.991849] kasan_save_free_info+0x2b/0x50 [ 33.992391] __kasan_slab_free+0x10a/0x190 [ 33.992926] kmem_cache_free+0x10d/0x4d0 [ 33.993454] rcu_core+0x8c8/0x2860 [ 33.993912] __do_softirq+0x1b7/0x7d4 [ 33.994389] [ 33.994604] Last potentially related work creation: [ 33.995193] kasan_save_stack+0x22/0x50 [ 33.995702] __kasan_record_aux_stack+0x8e/0xa0 [ 33.996280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.996928] remove_vma+0x139/0x170 [ 33.997382] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.998040] do_vmi_munmap+0x1f1/0x2b0 [ 33.998574] __vm_munmap+0x138/0x3a0 [ 33.999112] __x64_sys_munmap+0x59/0x80 [ 33.999612] do_syscall_64+0x3f/0x90 [ 34.000089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.000728] [ 34.000949] The buggy address belongs to the object at ffff88800f763bc8 [ 34.000949] which belongs to the cache vm_area_struct of size 168 [ 34.002433] The buggy address is located 88 bytes inside of [ 34.002433] freed 168-byte region [ffff88800f763bc8, ffff88800f763c70) [ 34.003836] [ 34.004054] The buggy address belongs to the physical page: [ 34.004719] page:00000000ad6a3691 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf763 [ 34.005800] memcg:ffff88801662d401 [ 34.006238] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.006883] page_type: 0xffffffff() [ 34.007335] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.008259] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801662d401 [ 34.009173] page dumped because: kasan: bad access detected [ 34.009834] [ 34.010068] Memory state around the buggy address: [ 34.010652] ffff88800f763b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.011517] ffff88800f763b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.012368] >ffff88800f763c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.013218] ^ [ 34.013747] ffff88800f763c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.014623] ffff88800f763d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.015482] ================================================================== [ 34.016421] Disabling lock debugging due to kernel taint [ 36.038555] BUG: Bad rss-counter state mm:00000000c13eb59d type:MM_FILEPAGES val:33 [ 36.039668] BUG: Bad rss-counter state mm:00000000c13eb59d type:MM_ANONPAGES val:22 [ 36.486905] BUG: Bad rss-counter state mm:0000000017ac415d type:MM_FILEPAGES val:33 [ 36.488017] BUG: Bad rss-counter state mm:0000000017ac415d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56383' (ECDSA) to the list of known hosts. 2023/06/19 13:14:21 fuzzer started 2023/06/19 13:14:22 dialing manager at localhost:44161 2023/06/19 13:14:22 checking machine... 2023/06/19 13:14:22 checking revisions... [ 37.223458] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:14:22 testing simple program... [ 37.267052] cgroup: Unknown subsys name 'net' [ 37.341285] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:14:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff110012db8ad RSI=0000000000000008 RDI=ffff8880096dc568 RBP=ffff8880096dc560 RSP=ffff888017f17570 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000b7f00000b7f R12=0000000000000000 R13=0000000000000003 R14=ffff888017f17728 R15=ffff88800fbebdc0 RIP=ffffffff812e0635 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 00007f5f38f76900 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=00007f5f3952d618 CR3=000000000c4ce000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f100cde3640 CR3=000000000c6a0000 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=00000000000000000000000000000000 XMM01=094257e71fbcad93b349bdfcdc597030 XMM02=2c67c8bc2e329bc300000000001203b8 XMM03=fb795ef6d65770560000000000124028 XMM04=daa2015c31ae676100000000000ae988 XMM05=19e9129bd510f2350000000000133bb8 XMM06=d0d4a73e41a977580000000000132d90 XMM07=e042d86d42eb936e0000000000124300 XMM08=6e37ed86db57bd840000000000120418 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000