syzkaller login: [ 54.272823] BUG: Bad rss-counter state mm:00000000c2625d27 type:MM_FILEPAGES val:33 [ 54.274301] BUG: Bad rss-counter state mm:00000000c2625d27 type:MM_ANONPAGES val:22 [ 54.442710] ================================================================== [ 54.443585] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.444466] Read of size 8 at addr ffff8880095b4a50 by task sshd/221 [ 54.445352] [ 54.445565] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.446382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.447304] Call Trace: [ 54.447625] [ 54.447896] dump_stack_lvl+0x91/0xf0 [ 54.448361] print_report+0xcc/0x620 [ 54.448818] ? __virt_addr_valid+0x102/0x340 [ 54.449344] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.449931] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.450521] kasan_report+0xbe/0xf0 [ 54.450977] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.451567] vma_interval_tree_remove+0xc75/0xec0 [ 54.452136] vma_prepare+0xc54/0x11a0 [ 54.452589] __split_vma+0x5af/0x950 [ 54.453064] ? __pfx___split_vma+0x10/0x10 [ 54.453599] ? find_held_lock+0x2c/0x110 [ 54.454125] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.454711] ? lock_is_held_type+0x9f/0x120 [ 54.455258] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.455861] ? mtree_range_walk+0x632/0x900 [ 54.456417] ? mas_walk+0x5c7/0x7c0 [ 54.456899] do_vmi_munmap+0x1f1/0x2b0 [ 54.457392] mmap_region+0x1f9/0x2660 [ 54.457880] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.458401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.459131] ? __pfx_lock_acquire+0x10/0x10 [ 54.459666] ? __pfx_mmap_region+0x10/0x10 [ 54.460203] ? security_mmap_addr+0x7d/0xa0 [ 54.460739] ? get_unmapped_area+0x1f5/0x3f0 [ 54.461299] do_mmap+0x854/0xf00 [ 54.461747] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.462252] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.462829] ksys_mmap_pgoff+0x3af/0x500 [ 54.463337] do_syscall_64+0x3f/0x90 [ 54.463813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.464460] RIP: 0033:0x7fdc5cf7bd82 [ 54.464922] 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 [ 54.467099] RSP: 002b:00007fff16c96238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.468020] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc5cf7bd82 [ 54.468885] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc5c3b5000 [ 54.469744] RBP: 00007fdc5c3b5000 R08: 0000000000000009 R09: 0000000000001000 [ 54.470614] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4cf1daec0 [ 54.471467] R13: 00007fff16c96250 R14: 00007fff16c96280 R15: 00007fff16c965e0 [ 54.472338] [ 54.472634] [ 54.472852] Allocated by task 214: [ 54.473284] kasan_save_stack+0x22/0x50 [ 54.473792] kasan_set_track+0x25/0x30 [ 54.474284] __kasan_slab_alloc+0x59/0x70 [ 54.474821] kmem_cache_alloc+0x16b/0x370 [ 54.475340] vm_area_dup+0x20/0x160 [ 54.475790] __split_vma+0x170/0x950 [ 54.476264] split_vma+0xc6/0x110 [ 54.476696] mprotect_fixup+0x8d2/0xb30 [ 54.477194] do_mprotect_pkey+0x87e/0xd40 [ 54.477722] __x64_sys_mprotect+0x78/0xc0 [ 54.478251] do_syscall_64+0x3f/0x90 [ 54.478730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.479368] [ 54.479586] Freed by task 214: [ 54.479980] kasan_save_stack+0x22/0x50 [ 54.480493] kasan_set_track+0x25/0x30 [ 54.480982] kasan_save_free_info+0x2b/0x50 [ 54.481511] __kasan_slab_free+0x10a/0x190 [ 54.482048] kmem_cache_free+0x10d/0x4d0 [ 54.482571] rcu_core+0x8c8/0x2860 [ 54.483018] __do_softirq+0x1b7/0x7d4 [ 54.483507] [ 54.483723] Last potentially related work creation: [ 54.484318] kasan_save_stack+0x22/0x50 [ 54.484814] __kasan_record_aux_stack+0x8e/0xa0 [ 54.485391] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.486031] remove_vma+0x139/0x170 [ 54.486495] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.487131] do_vmi_munmap+0x1f1/0x2b0 [ 54.487627] __vm_munmap+0x138/0x3a0 [ 54.488099] __x64_sys_munmap+0x59/0x80 [ 54.488592] do_syscall_64+0x3f/0x90 [ 54.489063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.489709] [ 54.489924] The buggy address belongs to the object at ffff8880095b49f8 [ 54.489924] which belongs to the cache vm_area_struct of size 168 [ 54.491431] The buggy address is located 88 bytes inside of [ 54.491431] freed 168-byte region [ffff8880095b49f8, ffff8880095b4aa0) [ 54.492857] [ 54.493075] The buggy address belongs to the physical page: [ 54.493747] page:0000000075145b8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95b4 [ 54.494854] memcg:ffff888018007601 [ 54.495290] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.495942] page_type: 0xffffffff() [ 54.496394] raw: 0100000000000200 ffff88800879fc80 ffffea000031cfc0 dead000000000006 [ 54.497320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018007601 [ 54.498233] page dumped because: kasan: bad access detected [ 54.498901] [ 54.499118] Memory state around the buggy address: [ 54.499700] ffff8880095b4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.500563] ffff8880095b4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 54.501429] >ffff8880095b4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.502297] ^ [ 54.503026] ffff8880095b4a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 54.503888] ffff8880095b4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.504746] ================================================================== [ 54.505791] Disabling lock debugging due to kernel taint [ 56.640390] BUG: Bad rss-counter state mm:00000000d90fddf6 type:MM_FILEPAGES val:33 [ 56.641418] BUG: Bad rss-counter state mm:00000000d90fddf6 type:MM_ANONPAGES val:22 [ 57.188997] BUG: Bad rss-counter state mm:000000005e9b42f8 type:MM_FILEPAGES val:33 [ 57.189986] BUG: Bad rss-counter state mm:000000005e9b42f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4987' (ECDSA) to the list of known hosts. 2023/06/19 11:53:41 fuzzer started 2023/06/19 11:53:41 dialing manager at localhost:44161 2023/06/19 11:53:41 checking machine... 2023/06/19 11:53:41 checking revisions... [ 57.819617] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:53:41 testing simple program... [ 57.868679] cgroup: Unknown subsys name 'net' [ 57.916444] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:53:18 Registers: info registers vcpu 0 RAX=0000607f92e0c5f0 RBX=ffff8880140ba600 RCX=0000000000000000 RDX=1ffff110028174c0 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff888015f47870 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000408 R13=ffffffff87b67200 R14=ffff888015fc7600 R15=ffff88806ce361e0 RIP=ffffffff818279f9 RFL=00000046 [---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 00007f7a2e2f0700 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=00007f96b0a120b0 CR3=000000000e4e0000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732030343a3335 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383730 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86096757 RBX=0000000000000002 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09a48 R15=ffff88806cf09a98 RIP=ffffffff81130b99 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 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=00007f6021ac1270 CR3=000000000f20e000 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=db05edbe99e6dfb1e34d3d205692c0b1 XMM02=ec2efd57dc4c00df000000000011d4b8 XMM03=91c5cfe3e6b6709d000000000011d588 XMM04=4d54be9808737a2300000000000ae988 XMM05=e4cb8bb95a7664b60000000000133d98 XMM06=aeb17313f85337c50000000000132c00 XMM07=e042d86d42eb936e0000000000124478 XMM08=91c5cfe3e6b6709d000000000011d588 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000