syzkaller login: [ 31.532484] BUG: Bad rss-counter state mm:0000000022dd06d6 type:MM_FILEPAGES val:33 [ 31.533704] BUG: Bad rss-counter state mm:0000000022dd06d6 type:MM_ANONPAGES val:22 [ 31.571673] ================================================================== [ 31.572690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.573631] Read of size 8 at addr ffff888009619df0 by task sshd/221 [ 31.574472] [ 31.574688] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.575557] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.576597] Call Trace: [ 31.576960] [ 31.577258] dump_stack_lvl+0x91/0xf0 [ 31.577748] print_report+0xcc/0x620 [ 31.578247] ? __virt_addr_valid+0x102/0x340 [ 31.578813] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.579431] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.580059] kasan_report+0xbe/0xf0 [ 31.580556] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.581181] vma_interval_tree_remove+0xc75/0xec0 [ 31.581791] vma_prepare+0xc54/0x11a0 [ 31.582277] __split_vma+0x5af/0x950 [ 31.582751] ? __pfx___split_vma+0x10/0x10 [ 31.583304] ? find_held_lock+0x2c/0x110 [ 31.583830] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.584412] ? lock_is_held_type+0x9f/0x120 [ 31.584980] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.585604] ? mtree_range_walk+0x632/0x900 [ 31.586172] ? mas_walk+0x5c7/0x7c0 [ 31.586648] do_vmi_munmap+0x1f1/0x2b0 [ 31.587148] mmap_region+0x1f9/0x2660 [ 31.587635] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.588144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.588877] ? __pfx_lock_acquire+0x10/0x10 [ 31.589410] ? __pfx_mmap_region+0x10/0x10 [ 31.589936] ? security_mmap_addr+0x7d/0xa0 [ 31.590467] ? get_unmapped_area+0x1f5/0x3f0 [ 31.591013] do_mmap+0x854/0xf00 [ 31.591462] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.591955] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.592543] ksys_mmap_pgoff+0x3af/0x500 [ 31.593050] do_syscall_64+0x3f/0x90 [ 31.593530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.594175] RIP: 0033:0x7fa0ae77bd82 [ 31.594633] 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 [ 31.596746] RSP: 002b:00007ffe8bc7d668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.597649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0ae77bd82 [ 31.598498] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0adbb5000 [ 31.599343] RBP: 00007fa0adbb5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.600183] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fac0f50f70 [ 31.601042] R13: 00007ffe8bc7d680 R14: 00007ffe8bc7d6b0 R15: 00007ffe8bc7da10 [ 31.601900] [ 31.602197] [ 31.602413] Allocated by task 214: [ 31.602840] kasan_save_stack+0x22/0x50 [ 31.603342] kasan_set_track+0x25/0x30 [ 31.603834] __kasan_slab_alloc+0x59/0x70 [ 31.604355] kmem_cache_alloc+0x16b/0x370 [ 31.604882] vm_area_dup+0x20/0x160 [ 31.605334] __split_vma+0x170/0x950 [ 31.605797] split_vma+0xc6/0x110 [ 31.606233] mprotect_fixup+0x8d2/0xb30 [ 31.606732] do_mprotect_pkey+0x87e/0xd40 [ 31.607257] __x64_sys_mprotect+0x78/0xc0 [ 31.607777] do_syscall_64+0x3f/0x90 [ 31.608252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.608910] [ 31.609122] Freed by task 214: [ 31.609517] kasan_save_stack+0x22/0x50 [ 31.610019] kasan_set_track+0x25/0x30 [ 31.610512] kasan_save_free_info+0x2b/0x50 [ 31.611049] __kasan_slab_free+0x10a/0x190 [ 31.611580] kmem_cache_free+0x10d/0x4d0 [ 31.612084] rcu_core+0x8c8/0x2860 [ 31.612538] __do_softirq+0x1b7/0x7d4 [ 31.613016] [ 31.613229] Last potentially related work creation: [ 31.613814] kasan_save_stack+0x22/0x50 [ 31.614319] __kasan_record_aux_stack+0x8e/0xa0 [ 31.614892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.615536] remove_vma+0x139/0x170 [ 31.615985] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.616556] do_vmi_munmap+0x1f1/0x2b0 [ 31.617048] __vm_munmap+0x138/0x3a0 [ 31.617524] __x64_sys_munmap+0x59/0x80 [ 31.618019] do_syscall_64+0x3f/0x90 [ 31.618498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.619135] [ 31.619349] Second to last potentially related work creation: [ 31.620021] kasan_save_stack+0x22/0x50 [ 31.620527] __kasan_record_aux_stack+0x8e/0xa0 [ 31.621098] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.621738] remove_vma+0x139/0x170 [ 31.622187] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.622744] do_vmi_munmap+0x1f1/0x2b0 [ 31.623231] mmap_region+0x1f9/0x2660 [ 31.623705] do_mmap+0x854/0xf00 [ 31.624138] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.624636] ksys_mmap_pgoff+0x3af/0x500 [ 31.625134] do_syscall_64+0x3f/0x90 [ 31.625622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.626261] [ 31.626479] The buggy address belongs to the object at ffff888009619d98 [ 31.626479] which belongs to the cache vm_area_struct of size 168 [ 31.627943] The buggy address is located 88 bytes inside of [ 31.627943] freed 168-byte region [ffff888009619d98, ffff888009619e40) [ 31.629350] [ 31.629568] The buggy address belongs to the physical page: [ 31.630222] page:00000000dfe7de44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9619 [ 31.631291] memcg:ffff888014428901 [ 31.631711] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.632410] page_type: 0xffffffff() [ 31.632870] raw: 0100000000000200 ffff8880087a0c80 ffffea0000268ac0 dead000000000005 [ 31.633784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014428901 [ 31.634684] page dumped because: kasan: bad access detected [ 31.635339] [ 31.635555] Memory state around the buggy address: [ 31.636128] ffff888009619c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.636990] ffff888009619d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.637848] >ffff888009619d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.638693] ^ [ 31.639502] ffff888009619e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.640357] ffff888009619e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.641228] ================================================================== [ 31.642403] Disabling lock debugging due to kernel taint [ 33.978645] BUG: Bad rss-counter state mm:0000000083021a89 type:MM_FILEPAGES val:33 [ 33.979668] BUG: Bad rss-counter state mm:0000000083021a89 type:MM_ANONPAGES val:22 [ 34.542022] BUG: Bad rss-counter state mm:00000000e7325fc6 type:MM_FILEPAGES val:33 [ 34.543185] BUG: Bad rss-counter state mm:00000000e7325fc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41729' (ECDSA) to the list of known hosts. 2023/06/20 12:04:58 fuzzer started 2023/06/20 12:04:58 dialing manager at localhost:36067 2023/06/20 12:04:58 checking machine... 2023/06/20 12:04:58 checking revisions... [ 35.176575] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:04:58 testing simple program... [ 35.217901] cgroup: Unknown subsys name 'net' [ 35.263432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:04:58 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000d40 RSI=0000000000000010 RDI=ffff888016127760 RBP=ffff88800bfa7640 RSP=ffff888016127740 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000d40 R13=0000000000000d40 R14=ffff888016127760 R15=0000000000000d40 RIP=ffffffff822703bd RFL=00000287 [--S--PC] 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 00007f6fd58e7700 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=00007fc5012b63f0 CR3=000000000daa2000 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=2037353a34303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34303a3231203032 XMM08=69767265733d7373616c63742030733a 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=ffff888008c04400 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=00007ffdd50bf000 CR3=000000000cc42000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000