syzkaller login: [ 31.420405] BUG: Bad rss-counter state mm:0000000077a9a378 type:MM_FILEPAGES val:33 [ 31.421324] BUG: Bad rss-counter state mm:0000000077a9a378 type:MM_ANONPAGES val:22 [ 31.532119] ================================================================== [ 31.532758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.533357] Read of size 8 at addr ffff888018d01880 by task sshd/221 [ 31.533864] [ 31.534015] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.534609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.535307] Call Trace: [ 31.535508] <TASK> [ 31.535702] dump_stack_lvl+0x91/0xf0 [ 31.536185] print_report+0xcc/0x620 [ 31.536510] ? __virt_addr_valid+0x102/0x340 [ 31.536868] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.537269] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.537667] kasan_report+0xbe/0xf0 [ 31.537979] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.538387] vma_interval_tree_remove+0xc75/0xec0 [ 31.538824] vma_prepare+0xc54/0x11a0 [ 31.539132] __split_vma+0x5af/0x950 [ 31.539471] ? __pfx___split_vma+0x10/0x10 [ 31.539815] ? find_held_lock+0x2c/0x110 [ 31.540162] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.540562] ? lock_is_held_type+0x9f/0x120 [ 31.540940] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.541341] ? mtree_range_walk+0x632/0x900 [ 31.541690] ? mas_walk+0x5c7/0x7c0 [ 31.541987] do_vmi_munmap+0x1f1/0x2b0 [ 31.542296] mmap_region+0x1f9/0x2660 [ 31.542610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.542958] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.543486] ? __pfx_lock_acquire+0x10/0x10 [ 31.543839] ? __pfx_mmap_region+0x10/0x10 [ 31.544190] ? security_mmap_addr+0x7d/0xa0 [ 31.544561] ? get_unmapped_area+0x1f5/0x3f0 [ 31.544936] do_mmap+0x854/0xf00 [ 31.545211] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.545517] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.545867] ksys_mmap_pgoff+0x3af/0x500 [ 31.546200] do_syscall_64+0x3f/0x90 [ 31.546549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.547016] RIP: 0033:0x7fbfbf7f8d82 [ 31.547358] 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 [ 31.548833] RSP: 002b:00007fff9ee05d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.549445] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfbf7f8d82 [ 31.550022] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbfbec32000 [ 31.550552] RBP: 00007fbfbec32000 R08: 0000000000000009 R09: 0000000000001000 [ 31.551079] R10: 0000000000000812 R11: 0000000000000206 R12: 00005562a2687ec0 [ 31.551759] R13: 00007fff9ee05d20 R14: 00007fff9ee05d50 R15: 00007fff9ee060b0 [ 31.552369] </TASK> [ 31.552592] [ 31.552728] Allocated by task 214: [ 31.553019] kasan_save_stack+0x22/0x50 [ 31.553353] kasan_set_track+0x25/0x30 [ 31.553668] __kasan_slab_alloc+0x59/0x70 [ 31.554002] kmem_cache_alloc+0x16b/0x370 [ 31.554332] vm_area_dup+0x20/0x160 [ 31.554669] __split_vma+0x170/0x950 [ 31.554978] split_vma+0xc6/0x110 [ 31.555288] mprotect_fixup+0x8d2/0xb30 [ 31.555616] do_mprotect_pkey+0x87e/0xd40 [ 31.555955] __x64_sys_mprotect+0x78/0xc0 [ 31.556300] do_syscall_64+0x3f/0x90 [ 31.556645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.557082] [ 31.557223] Freed by task 214: [ 31.557481] kasan_save_stack+0x22/0x50 [ 31.557813] kasan_set_track+0x25/0x30 [ 31.558144] kasan_save_free_info+0x2b/0x50 [ 31.558489] __kasan_slab_free+0x10a/0x190 [ 31.558843] kmem_cache_free+0x10d/0x4d0 [ 31.559170] rcu_core+0x8c8/0x2860 [ 31.559479] __do_softirq+0x1b7/0x7d4 [ 31.559786] [ 31.559927] Last potentially related work creation: [ 31.560299] kasan_save_stack+0x22/0x50 [ 31.560616] __kasan_record_aux_stack+0x8e/0xa0 [ 31.560971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.561370] remove_vma+0x139/0x170 [ 31.561692] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.562047] do_vmi_munmap+0x1f1/0x2b0 [ 31.562351] __vm_munmap+0x138/0x3a0 [ 31.562673] __x64_sys_munmap+0x59/0x80 [ 31.562991] do_syscall_64+0x3f/0x90 [ 31.563340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.563788] [ 31.563932] The buggy address belongs to the object at ffff888018d01828 [ 31.563932] which belongs to the cache vm_area_struct of size 168 [ 31.564883] The buggy address is located 88 bytes inside of [ 31.564883] freed 168-byte region [ffff888018d01828, ffff888018d018d0) [ 31.565864] [ 31.566017] The buggy address belongs to the physical page: [ 31.566482] page:00000000e0d51243 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d01 [ 31.567262] memcg:ffff88800cc4d201 [ 31.567534] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.567923] page_type: 0xffffffff() [ 31.568195] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.568791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc4d201 [ 31.569335] page dumped because: kasan: bad access detected [ 31.569761] [ 31.569890] Memory state around the buggy address: [ 31.570240] ffff888018d01780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.570758] ffff888018d01800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.571298] >ffff888018d01880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.571871] ^ [ 31.572124] ffff888018d01900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.572682] ffff888018d01980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.573200] ================================================================== [ 31.573906] Disabling lock debugging due to kernel taint [ 33.538952] BUG: Bad rss-counter state mm:000000009a07d1c9 type:MM_FILEPAGES val:33 [ 33.539797] BUG: Bad rss-counter state mm:000000009a07d1c9 type:MM_ANONPAGES val:22 [ 33.927208] BUG: Bad rss-counter state mm:000000000ce80309 type:MM_FILEPAGES val:33 [ 33.927922] BUG: Bad rss-counter state mm:000000000ce80309 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5379' (ECDSA) to the list of known hosts. 2023/06/21 09:51:00 fuzzer started 2023/06/21 09:51:00 dialing manager at localhost:36067 2023/06/21 09:51:00 checking machine... 2023/06/21 09:51:00 checking revisions... [ 34.514762] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:51:00 testing simple program... [ 34.557379] cgroup: Unknown subsys name 'net' [ 34.595119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:51:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008e50000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f0608fec508 CR3=000000000de1a000 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=2030303a31353a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a30353a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea0000651a00 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880084c6140 RSI=ffff888019468a00 RDI=ffff888000000000 RBP=ffffffff844ae59b RSP=ffff888018fcfa08 R8 =ffffea0000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888019468a00 R13=ffff8880084c6140 R14=0000000000000000 R15=ffff8880084c6140 RIP=ffffffff8180c9a7 RFL=00000286 [--S--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 00007f542afc7900 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=00007f542af6c008 CR3=000000000bef6000 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