syzkaller login: [ 31.206416] sshd (213) used greatest stack depth: 24128 bytes left [ 31.207514] BUG: Bad rss-counter state mm:000000005851acd7 type:MM_FILEPAGES val:33 [ 31.208695] BUG: Bad rss-counter state mm:000000005851acd7 type:MM_ANONPAGES val:22 [ 31.381226] ================================================================== [ 31.382177] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.383151] Read of size 8 at addr ffff88800e153df0 by task sshd/220 [ 31.384145] [ 31.384362] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.385229] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.386229] Call Trace: [ 31.386550] [ 31.386835] dump_stack_lvl+0x91/0xf0 [ 31.387326] print_report+0xcc/0x620 [ 31.387805] ? __virt_addr_valid+0x102/0x340 [ 31.388376] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.388997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.389605] kasan_report+0xbe/0xf0 [ 31.390084] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.390707] vma_interval_tree_remove+0xc75/0xec0 [ 31.391307] vma_prepare+0xc54/0x11a0 [ 31.391791] __split_vma+0x5af/0x950 [ 31.392275] ? __pfx___split_vma+0x10/0x10 [ 31.392824] ? find_held_lock+0x2c/0x110 [ 31.393378] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.393982] ? lock_is_held_type+0x9f/0x120 [ 31.394553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.395203] ? mtree_range_walk+0x632/0x900 [ 31.395792] ? mas_walk+0x5c7/0x7c0 [ 31.396306] do_vmi_munmap+0x1f1/0x2b0 [ 31.396833] mmap_region+0x1f9/0x2660 [ 31.397346] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.397892] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.398647] ? __pfx_lock_acquire+0x10/0x10 [ 31.399215] ? __pfx_mmap_region+0x10/0x10 [ 31.399779] ? security_mmap_addr+0x7d/0xa0 [ 31.400363] ? get_unmapped_area+0x1f5/0x3f0 [ 31.400956] do_mmap+0x854/0xf00 [ 31.401425] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.401961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.402554] ksys_mmap_pgoff+0x3af/0x500 [ 31.403094] do_syscall_64+0x3f/0x90 [ 31.403602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.404304] RIP: 0033:0x7f0acd16bd82 [ 31.404797] 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 [ 31.407045] RSP: 002b:00007ffee3d94a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.408004] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0acd16bd82 [ 31.408940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0acc5a5000 [ 31.409839] RBP: 00007f0acc5a5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.410739] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d3c3682ec0 [ 31.411637] R13: 00007ffee3d94a80 R14: 00007ffee3d94ab0 R15: 00007ffee3d94e10 [ 31.412552] [ 31.412866] [ 31.413093] Allocated by task 213: [ 31.413550] kasan_save_stack+0x22/0x50 [ 31.414083] kasan_set_track+0x25/0x30 [ 31.414613] __kasan_slab_alloc+0x59/0x70 [ 31.415183] kmem_cache_alloc+0x16b/0x370 [ 31.415739] vm_area_dup+0x20/0x160 [ 31.416247] __split_vma+0x170/0x950 [ 31.416742] split_vma+0xc6/0x110 [ 31.417214] mprotect_fixup+0x8d2/0xb30 [ 31.417751] do_mprotect_pkey+0x87e/0xd40 [ 31.418307] __x64_sys_mprotect+0x78/0xc0 [ 31.418867] do_syscall_64+0x3f/0x90 [ 31.419380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.420080] [ 31.420314] Freed by task 213: [ 31.420752] kasan_save_stack+0x22/0x50 [ 31.421326] kasan_set_track+0x25/0x30 [ 31.421875] kasan_save_free_info+0x2b/0x50 [ 31.422468] __kasan_slab_free+0x10a/0x190 [ 31.423074] kmem_cache_free+0x10d/0x4d0 [ 31.423641] rcu_core+0x8c8/0x2860 [ 31.424149] __do_softirq+0x1b7/0x7d4 [ 31.424687] [ 31.424931] Last potentially related work creation: [ 31.425653] kasan_save_stack+0x22/0x50 [ 31.426220] __kasan_record_aux_stack+0x8e/0xa0 [ 31.426876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.427601] remove_vma+0x139/0x170 [ 31.428130] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.428749] do_vmi_munmap+0x1f1/0x2b0 [ 31.429231] __vm_munmap+0x138/0x3a0 [ 31.429709] __x64_sys_munmap+0x59/0x80 [ 31.430203] do_syscall_64+0x3f/0x90 [ 31.430672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.431311] [ 31.431525] The buggy address belongs to the object at ffff88800e153d98 [ 31.431525] which belongs to the cache vm_area_struct of size 168 [ 31.433013] The buggy address is located 88 bytes inside of [ 31.433013] freed 168-byte region [ffff88800e153d98, ffff88800e153e40) [ 31.434422] [ 31.434643] The buggy address belongs to the physical page: [ 31.435296] page:0000000013963fa8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe153 [ 31.436391] memcg:ffff88800e687d01 [ 31.436817] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.437463] page_type: 0xffffffff() [ 31.437919] raw: 0100000000000200 ffff8880087a0c80 ffffea000038d280 dead000000000004 [ 31.438835] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e687d01 [ 31.439745] page dumped because: kasan: bad access detected [ 31.440416] [ 31.440632] Memory state around the buggy address: [ 31.441210] ffff88800e153c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.442065] ffff88800e153d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.442928] >ffff88800e153d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.443782] ^ [ 31.444623] ffff88800e153e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.445493] ffff88800e153e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.446344] ================================================================== [ 31.447320] Disabling lock debugging due to kernel taint [ 34.153894] BUG: Bad rss-counter state mm:0000000002c1e1d6 type:MM_FILEPAGES val:33 [ 34.155093] BUG: Bad rss-counter state mm:0000000002c1e1d6 type:MM_ANONPAGES val:22 [ 34.661812] BUG: Bad rss-counter state mm:00000000a7f3b3f5 type:MM_FILEPAGES val:33 [ 34.663012] BUG: Bad rss-counter state mm:00000000a7f3b3f5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36764' (ECDSA) to the list of known hosts. 2023/06/20 13:51:14 fuzzer started 2023/06/20 13:51:14 dialing manager at localhost:36067 2023/06/20 13:51:14 checking machine... 2023/06/20 13:51:14 checking revisions... [ 35.419724] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:51:15 testing simple program... [ 35.466015] cgroup: Unknown subsys name 'net' [ 35.514380] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:51:14 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=ffffffff81716aff RDX=ffff888015db0000 RSI=0000000000000000 RDI=0000000000000006 RBP=00007ffd5afaa19c RSP=ffff888018cf7de0 R8 =0000000000000006 R9 =00007ffd5afb4000 R10=00007ffd5afaa19c R11=0000000000000000 R12=ffff88800e0b9488 R13=00007ffd5afb4000 R14=0000000000000001 R15=ffff88800e0b94b8 RIP=ffffffff814c086b RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff9b16c6900 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=00007ffd5afaa19c CR3=000000000c784000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=313d6563636120322e322e202e30313d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f0cce639260 CR3=000000000c5d8000 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=b563254c9fd15d9e124b568d9ca1c165 XMM02=2c67c8bc2e329bc3000000000011a538 XMM03=fb795ef6d65770560000000000121da8 XMM04=4e85d00cce49872300000000000ae988 XMM05=d86913c41ff8e79f00000000001322d8 XMM06=4fda316b135da52b0000000000131cd0 XMM07=e042d86d42eb936e0000000000122028 XMM08=cde78e19fb64e7ba000000000011a598 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000