syzkaller login: [ 44.903718] BUG: Bad rss-counter state mm:000000009778a262 type:MM_FILEPAGES val:33 [ 44.904742] BUG: Bad rss-counter state mm:000000009778a262 type:MM_ANONPAGES val:22 [ 45.064170] ================================================================== [ 45.065288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.066646] Read of size 8 at addr ffff8880195db5c8 by task sshd/220 [ 45.067550] [ 45.067810] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.068829] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.069993] Call Trace: [ 45.070373] [ 45.070728] dump_stack_lvl+0x91/0xf0 [ 45.071305] print_report+0xcc/0x620 [ 45.071878] ? __virt_addr_valid+0x102/0x340 [ 45.072537] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.073269] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.074001] kasan_report+0xbe/0xf0 [ 45.074595] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.075350] vma_interval_tree_remove+0xc75/0xec0 [ 45.076078] vma_prepare+0xc54/0x11a0 [ 45.076666] __split_vma+0x5af/0x950 [ 45.077233] ? __pfx___split_vma+0x10/0x10 [ 45.077877] ? find_held_lock+0x2c/0x110 [ 45.078537] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.079232] ? lock_is_held_type+0x9f/0x120 [ 45.079892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.080631] ? mtree_range_walk+0x632/0x900 [ 45.081297] ? mas_walk+0x5c7/0x7c0 [ 45.081877] do_vmi_munmap+0x1f1/0x2b0 [ 45.082498] mmap_region+0x1f9/0x2660 [ 45.083098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.083734] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.084618] ? __pfx_lock_acquire+0x10/0x10 [ 45.085270] ? __pfx_mmap_region+0x10/0x10 [ 45.085929] ? security_mmap_addr+0x7d/0xa0 [ 45.086598] ? get_unmapped_area+0x1f5/0x3f0 [ 45.087276] do_mmap+0x854/0xf00 [ 45.087806] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.088432] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.089131] ksys_mmap_pgoff+0x3af/0x500 [ 45.089758] do_syscall_64+0x3f/0x90 [ 45.090335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.091148] RIP: 0033:0x7fd053d0dd82 [ 45.091714] 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 [ 45.094318] RSP: 002b:00007ffd8ddb6d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.095422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd053d0dd82 [ 45.096464] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd053147000 [ 45.097499] RBP: 00007fd053147000 R08: 0000000000000009 R09: 0000000000001000 [ 45.098558] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556635e1aec0 [ 45.099580] R13: 00007ffd8ddb6d30 R14: 00007ffd8ddb6d60 R15: 00007ffd8ddb70c0 [ 45.100630] [ 45.100985] [ 45.101240] Allocated by task 213: [ 45.101767] kasan_save_stack+0x22/0x50 [ 45.102385] kasan_set_track+0x25/0x30 [ 45.102997] __kasan_slab_alloc+0x59/0x70 [ 45.103633] kmem_cache_alloc+0x16b/0x370 [ 45.104264] vm_area_dup+0x20/0x160 [ 45.104812] __split_vma+0x170/0x950 [ 45.105378] split_vma+0xc6/0x110 [ 45.105910] mprotect_fixup+0x8d2/0xb30 [ 45.106532] do_mprotect_pkey+0x87e/0xd40 [ 45.107296] __x64_sys_mprotect+0x78/0xc0 [ 45.107938] do_syscall_64+0x3f/0x90 [ 45.108575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.109231] [ 45.109455] Freed by task 213: [ 45.109853] kasan_save_stack+0x22/0x50 [ 45.110364] kasan_set_track+0x25/0x30 [ 45.110890] kasan_save_free_info+0x2b/0x50 [ 45.111434] __kasan_slab_free+0x10a/0x190 [ 45.111973] kmem_cache_free+0x10d/0x4d0 [ 45.112490] rcu_core+0x8c8/0x2860 [ 45.112939] __do_softirq+0x1b7/0x7d4 [ 45.113428] [ 45.113653] Last potentially related work creation: [ 45.114244] kasan_save_stack+0x22/0x50 [ 45.114761] __kasan_record_aux_stack+0x8e/0xa0 [ 45.115346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.115992] remove_vma+0x139/0x170 [ 45.116450] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.117004] do_vmi_munmap+0x1f1/0x2b0 [ 45.117490] __vm_munmap+0x138/0x3a0 [ 45.117964] __x64_sys_munmap+0x59/0x80 [ 45.118466] do_syscall_64+0x3f/0x90 [ 45.118967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.119624] [ 45.119842] The buggy address belongs to the object at ffff8880195db570 [ 45.119842] which belongs to the cache vm_area_struct of size 168 [ 45.121320] The buggy address is located 88 bytes inside of [ 45.121320] freed 168-byte region [ffff8880195db570, ffff8880195db618) [ 45.122736] [ 45.122955] The buggy address belongs to the physical page: [ 45.123617] page:0000000031bb38ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x195db [ 45.124714] memcg:ffff888016e94d01 [ 45.125142] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.125862] page_type: 0xffffffff() [ 45.126311] raw: 0100000000000200 ffff88800879fc80 ffffea000051f540 000000000000000d [ 45.127237] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e94d01 [ 45.128166] page dumped because: kasan: bad access detected [ 45.128830] [ 45.129052] Memory state around the buggy address: [ 45.129634] ffff8880195db480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.130513] ffff8880195db500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 45.131386] >ffff8880195db580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.132234] ^ [ 45.132910] ffff8880195db600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 45.133775] ffff8880195db680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.134633] ================================================================== [ 45.135572] Disabling lock debugging due to kernel taint [ 47.408244] BUG: Bad rss-counter state mm:00000000157e3917 type:MM_FILEPAGES val:33 [ 47.409215] BUG: Bad rss-counter state mm:00000000157e3917 type:MM_ANONPAGES val:22 [ 47.849899] BUG: Bad rss-counter state mm:00000000315e4479 type:MM_FILEPAGES val:33 [ 47.851011] BUG: Bad rss-counter state mm:00000000315e4479 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51454' (ECDSA) to the list of known hosts. 2023/06/19 21:17:55 fuzzer started 2023/06/19 21:17:55 dialing manager at localhost:44161 2023/06/19 21:17:56 checking machine... 2023/06/19 21:17:56 checking revisions... [ 48.590867] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:17:56 testing simple program... [ 48.645381] cgroup: Unknown subsys name 'net' [ 48.703925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:17:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8542a6c0 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffffffff8542aab4 RBP=ffffffff86605973 RSP=ffff88806ce09a10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86605973 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800d5e7540 RIP=ffffffff8135bd1b RFL=00000217 [----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 0000000000000000 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=00007f3172c69cc8 CR3=000000000df6e000 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=2035353a37313a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37313a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002074e12 RSI=ffffffff844c1d8e RDI=ffff8880103a7050 RBP=ffff8880103a70a8 RSP=ffff8880103a6fe0 R8 =0000000000000001 R9 =ffff8880103a7090 R10=0000000000038001 R11=00000000000b3ea9 R12=ffff8880103a70b0 R13=ffff8880103a7098 R14=ffff8880103a7091 R15=ffff8880103a7050 RIP=ffffffff811306da 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 00007fc048ca0900 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=00007fc048c7f020 CR3=000000000ffc4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000