syzkaller login: [ 36.342084] BUG: Bad rss-counter state mm:0000000054fbffcc type:MM_FILEPAGES val:33 [ 36.343269] BUG: Bad rss-counter state mm:0000000054fbffcc type:MM_ANONPAGES val:22 [ 36.383768] ================================================================== [ 36.384912] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.386168] Read of size 8 at addr ffff88801465b310 by task sshd/219 [ 36.387034] [ 36.387288] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.388313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.389519] Call Trace: [ 36.389854] [ 36.390165] dump_stack_lvl+0x91/0xf0 [ 36.390825] print_report+0xcc/0x620 [ 36.391345] ? __virt_addr_valid+0x102/0x340 [ 36.391949] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.392620] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.393289] kasan_report+0xbe/0xf0 [ 36.393805] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.394492] vma_interval_tree_remove+0xc75/0xec0 [ 36.395146] vma_prepare+0xc54/0x11a0 [ 36.395663] __split_vma+0x5af/0x950 [ 36.396178] ? __pfx___split_vma+0x10/0x10 [ 36.396755] ? find_held_lock+0x2c/0x110 [ 36.397319] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.397934] ? lock_is_held_type+0x9f/0x120 [ 36.398532] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.399194] ? mtree_range_walk+0x632/0x900 [ 36.399794] ? mas_walk+0x5c7/0x7c0 [ 36.400302] do_vmi_munmap+0x1f1/0x2b0 [ 36.400832] mmap_region+0x1f9/0x2660 [ 36.401353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.401915] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.402702] ? __pfx_lock_acquire+0x10/0x10 [ 36.403283] ? __pfx_mmap_region+0x10/0x10 [ 36.403860] ? security_mmap_addr+0x7d/0xa0 [ 36.404445] ? get_unmapped_area+0x1f5/0x3f0 [ 36.405042] do_mmap+0x854/0xf00 [ 36.405519] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.406071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.406681] ksys_mmap_pgoff+0x3af/0x500 [ 36.407238] do_syscall_64+0x3f/0x90 [ 36.407761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.408464] RIP: 0033:0x7f779f803d82 [ 36.408961] 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 [ 36.411282] RSP: 002b:00007fffbf574c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.412257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f779f803d82 [ 36.413177] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f779ec3d000 [ 36.414101] RBP: 00007f779ec3d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.415014] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b46d412ec0 [ 36.415934] R13: 00007fffbf574cb0 R14: 00007fffbf574ce0 R15: 00007fffbf575040 [ 36.416865] [ 36.417175] [ 36.417405] Allocated by task 212: [ 36.417873] kasan_save_stack+0x22/0x50 [ 36.418453] kasan_set_track+0x25/0x30 [ 36.418993] __kasan_slab_alloc+0x59/0x70 [ 36.419560] kmem_cache_alloc+0x16b/0x370 [ 36.420125] vm_area_dup+0x20/0x160 [ 36.420622] __split_vma+0x170/0x950 [ 36.421129] split_vma+0xc6/0x110 [ 36.421608] mprotect_fixup+0x8d2/0xb30 [ 36.422159] do_mprotect_pkey+0x87e/0xd40 [ 36.422721] __x64_sys_mprotect+0x78/0xc0 [ 36.423278] do_syscall_64+0x3f/0x90 [ 36.423795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.424496] [ 36.424728] Freed by task 60: [ 36.425144] kasan_save_stack+0x22/0x50 [ 36.425684] kasan_set_track+0x25/0x30 [ 36.426223] kasan_save_free_info+0x2b/0x50 [ 36.426808] __kasan_slab_free+0x10a/0x190 [ 36.427384] kmem_cache_free+0x10d/0x4d0 [ 36.427934] rcu_core+0x8c8/0x2860 [ 36.428411] __do_softirq+0x1b7/0x7d4 [ 36.428988] [ 36.429226] Last potentially related work creation: [ 36.429868] kasan_save_stack+0x22/0x50 [ 36.430424] __kasan_record_aux_stack+0x8e/0xa0 [ 36.431054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.431750] remove_vma+0x139/0x170 [ 36.432244] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.432852] do_vmi_munmap+0x1f1/0x2b0 [ 36.433382] __vm_munmap+0x138/0x3a0 [ 36.433885] __x64_sys_munmap+0x59/0x80 [ 36.434433] do_syscall_64+0x3f/0x90 [ 36.434949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.435643] [ 36.435873] The buggy address belongs to the object at ffff88801465b2b8 [ 36.435873] which belongs to the cache vm_area_struct of size 168 [ 36.437456] The buggy address is located 88 bytes inside of [ 36.437456] freed 168-byte region [ffff88801465b2b8, ffff88801465b360) [ 36.438998] [ 36.439237] The buggy address belongs to the physical page: [ 36.439951] page:00000000c09e5a09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1465b [ 36.441142] memcg:ffff88800c666801 [ 36.441607] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.442315] page_type: 0xffffffff() [ 36.442805] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.443807] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c666801 [ 36.444792] page dumped because: kasan: bad access detected [ 36.445511] [ 36.445749] Memory state around the buggy address: [ 36.446389] ffff88801465b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.447325] ffff88801465b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.448254] >ffff88801465b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.449181] ^ [ 36.449687] ffff88801465b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.450630] ffff88801465b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.451538] ================================================================== [ 36.452621] Disabling lock debugging due to kernel taint [ 39.312062] BUG: Bad rss-counter state mm:00000000421c4431 type:MM_FILEPAGES val:33 [ 39.313283] BUG: Bad rss-counter state mm:00000000421c4431 type:MM_ANONPAGES val:22 [ 39.851046] BUG: Bad rss-counter state mm:00000000245367d4 type:MM_FILEPAGES val:33 [ 39.852182] BUG: Bad rss-counter state mm:00000000245367d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10140' (ECDSA) to the list of known hosts. 2023/06/20 09:41:33 fuzzer started 2023/06/20 09:41:33 dialing manager at localhost:44161 2023/06/20 09:41:33 checking machine... 2023/06/20 09:41:33 checking revisions... [ 40.514899] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:41:33 testing simple program... [ 40.565520] cgroup: Unknown subsys name 'net' [ 40.615313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:41:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad6d0 RCX=ffff888016ab77d0 RDX=1ffff11002d56ef1 RSI=ffff888016ab77c8 RDI=ffffffff813ad6d0 RBP=ffffffff813ad6d0 RSP=ffff888016ab76e0 R8 =0000000000000001 R9 =ffff888016ab7770 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff88800c4951c0 R15=0000000000000000 RIP=ffffffff811fc772 RFL=00000283 [--S---C] 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 00007f53ff4a4900 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=00007ffd76599000 CR3=000000000f10e000 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=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 info registers vcpu 1 RAX=1ffffffff0c26ea3 RBX=0000000000000002 RCX=ffffffff8613751a RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8613751e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09bd0 R15=ffff88806cf09a98 RIP=ffffffff81130b73 RFL=00000216 [----AP-] 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=00007f6fa119be60 CR3=000000000c4e8000 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=07f1b087d73ab8a1f04d34788fccc715 XMM02=2c67c8bc2e329bc3000000000011d188 XMM03=fb795ef6d65770560000000000124430 XMM04=f30276a68772426800000000000ae988 XMM05=dfcdbad4f1609c3700000000001341e8 XMM06=6c0f7436da37d9a10000000000133050 XMM07=e042d86d42eb936e00000000001246b0 XMM08=7b9af8144d8abdd0000000000011d1e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000