syzkaller login: [ 31.083962] BUG: Bad rss-counter state mm:0000000032e56339 type:MM_FILEPAGES val:33 [ 31.086214] BUG: Bad rss-counter state mm:0000000032e56339 type:MM_ANONPAGES val:22 [ 31.257385] ================================================================== [ 31.258326] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.259275] Read of size 8 at addr ffff8880196f03f8 by task sshd/220 [ 31.260181] [ 31.260487] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.261367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.262463] Call Trace: [ 31.262821] [ 31.263144] dump_stack_lvl+0x91/0xf0 [ 31.263648] print_report+0xcc/0x620 [ 31.264180] ? __virt_addr_valid+0x102/0x340 [ 31.264760] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265468] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266157] kasan_report+0xbe/0xf0 [ 31.266646] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267322] vma_interval_tree_remove+0xc75/0xec0 [ 31.268031] vma_prepare+0xc54/0x11a0 [ 31.268540] __split_vma+0x5af/0x950 [ 31.269054] ? __pfx___split_vma+0x10/0x10 [ 31.269626] ? find_held_lock+0x2c/0x110 [ 31.270218] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.270812] ? lock_is_held_type+0x9f/0x120 [ 31.271369] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.271990] ? mtree_range_walk+0x632/0x900 [ 31.272576] ? mas_walk+0x5c7/0x7c0 [ 31.273151] do_vmi_munmap+0x1f1/0x2b0 [ 31.273693] mmap_region+0x1f9/0x2660 [ 31.274198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.274745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.275541] ? __pfx_lock_acquire+0x10/0x10 [ 31.276150] ? __pfx_mmap_region+0x10/0x10 [ 31.276691] ? security_mmap_addr+0x7d/0xa0 [ 31.277265] ? get_unmapped_area+0x1f5/0x3f0 [ 31.277885] do_mmap+0x854/0xf00 [ 31.278411] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.278949] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.279524] ksys_mmap_pgoff+0x3af/0x500 [ 31.280095] do_syscall_64+0x3f/0x90 [ 31.280618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281358] RIP: 0033:0x7f9c6e9cfd82 [ 31.281856] 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 [ 31.284130] RSP: 002b:00007ffff41432b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.285086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c6e9cfd82 [ 31.286047] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c6de09000 [ 31.286954] RBP: 00007f9c6de09000 R08: 0000000000000009 R09: 0000000000001000 [ 31.287834] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646d5151f70 [ 31.288805] R13: 00007ffff41432d0 R14: 00007ffff4143300 R15: 00007ffff4143660 [ 31.289718] [ 31.290061] [ 31.290282] Allocated by task 213: [ 31.290717] kasan_save_stack+0x22/0x50 [ 31.291325] kasan_set_track+0x25/0x30 [ 31.291849] __kasan_slab_alloc+0x59/0x70 [ 31.292391] kmem_cache_alloc+0x16b/0x370 [ 31.292951] vm_area_dup+0x20/0x160 [ 31.293418] __split_vma+0x170/0x950 [ 31.293924] split_vma+0xc6/0x110 [ 31.294382] mprotect_fixup+0x8d2/0xb30 [ 31.294906] do_mprotect_pkey+0x87e/0xd40 [ 31.295448] __x64_sys_mprotect+0x78/0xc0 [ 31.296000] do_syscall_64+0x3f/0x90 [ 31.296487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297168] [ 31.297392] Freed by task 203: [ 31.297816] kasan_save_stack+0x22/0x50 [ 31.298457] kasan_set_track+0x25/0x30 [ 31.298978] kasan_save_free_info+0x2b/0x50 [ 31.299555] __kasan_slab_free+0x10a/0x190 [ 31.300117] kmem_cache_free+0x10d/0x4d0 [ 31.300656] rcu_core+0x8c8/0x2860 [ 31.301204] __do_softirq+0x1b7/0x7d4 [ 31.301744] [ 31.301979] Last potentially related work creation: [ 31.302562] kasan_save_stack+0x22/0x50 [ 31.303088] __kasan_record_aux_stack+0x8e/0xa0 [ 31.303663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.304331] remove_vma+0x139/0x170 [ 31.304785] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.305369] do_vmi_munmap+0x1f1/0x2b0 [ 31.305906] __vm_munmap+0x138/0x3a0 [ 31.306391] __x64_sys_munmap+0x59/0x80 [ 31.306915] do_syscall_64+0x3f/0x90 [ 31.307408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308099] [ 31.308318] The buggy address belongs to the object at ffff8880196f03a0 [ 31.308318] which belongs to the cache vm_area_struct of size 168 [ 31.309873] The buggy address is located 88 bytes inside of [ 31.309873] freed 168-byte region [ffff8880196f03a0, ffff8880196f0448) [ 31.311292] [ 31.311549] The buggy address belongs to the physical page: [ 31.312231] page:0000000079cd3f6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196f0 [ 31.313446] memcg:ffff88801907c001 [ 31.313927] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.314605] page_type: 0xffffffff() [ 31.315128] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.316136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801907c001 [ 31.317098] page dumped because: kasan: bad access detected [ 31.317852] [ 31.318100] Memory state around the buggy address: [ 31.318690] ffff8880196f0280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.319567] ffff8880196f0300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.320538] >ffff8880196f0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.321428] ^ [ 31.322355] ffff8880196f0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.323303] ffff8880196f0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.324181] ================================================================== [ 31.325181] Disabling lock debugging due to kernel taint [ 33.370157] BUG: Bad rss-counter state mm:00000000031c7a28 type:MM_FILEPAGES val:33 [ 33.371380] BUG: Bad rss-counter state mm:00000000031c7a28 type:MM_ANONPAGES val:22 [ 33.851911] BUG: Bad rss-counter state mm:00000000718ec0c9 type:MM_FILEPAGES val:33 [ 33.853178] BUG: Bad rss-counter state mm:00000000718ec0c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9158' (ECDSA) to the list of known hosts. 2023/06/19 15:30:11 fuzzer started 2023/06/19 15:30:11 dialing manager at localhost:44161 2023/06/19 15:30:11 checking machine... 2023/06/19 15:30:11 checking revisions... [ 34.515709] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:30:11 testing simple program... [ 34.564771] cgroup: Unknown subsys name 'net' [ 34.618784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:30:10 Registers: info registers vcpu 0 RAX=00000000842bc8bd RBX=00000000a3af9fa0 RCX=ffff8880192ffb68 RDX=000000000000000c RSI=0000000000000006 RDI=00000000c13044ac RBP=ffffffff81ef13be RSP=ffff8880192ffab8 R8 =00000000d6e31f83 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff8880192ffb20 R15=000000000000000c RIP=ffffffff82270eca RFL=00000297 [--S-APC] 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 00007fbd6cc2b900 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=00007fbd6d1e30b0 CR3=00000000167de000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 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=00007f62f9e7b180 CR3=000000000d8ca000 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=bef7ab7b8a389398d2485e21c91fb999 XMM02=000000000011cbc8eff9b2d0a8fce9cb XMM03=000000000011cc982c67c8bc2e329bc3 XMM04=53035ea54d62de1400000000000ae988 XMM05=19e9129bd510f2350000000000133d60 XMM06=29fe9682f73fe8e30000000000132bc8 XMM07=e042d86d42eb936e0000000000124430 XMM08=133e8f5ed55f4a65000000000011cc98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000