syzkaller login: [ 30.525390] BUG: Bad rss-counter state mm:00000000fce052e7 type:MM_FILEPAGES val:33 [ 30.526597] BUG: Bad rss-counter state mm:00000000fce052e7 type:MM_ANONPAGES val:22 [ 30.565949] ================================================================== [ 30.567294] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.568741] Read of size 8 at addr ffff88800fdd4228 by task sshd/220 [ 30.569936] [ 30.570314] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.571134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.572227] Call Trace: [ 30.572623] [ 30.572931] dump_stack_lvl+0x91/0xf0 [ 30.573409] print_report+0xcc/0x620 [ 30.573878] ? __virt_addr_valid+0x102/0x340 [ 30.574422] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.575021] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.575619] kasan_report+0xbe/0xf0 [ 30.576089] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.576699] vma_interval_tree_remove+0xc75/0xec0 [ 30.577292] vma_prepare+0xc54/0x11a0 [ 30.577756] __split_vma+0x5af/0x950 [ 30.578234] ? __pfx___split_vma+0x10/0x10 [ 30.578757] ? find_held_lock+0x2c/0x110 [ 30.579264] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.579822] ? lock_is_held_type+0x9f/0x120 [ 30.580358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.580944] ? mtree_range_walk+0x632/0x900 [ 30.581480] ? mas_walk+0x5c7/0x7c0 [ 30.581948] do_vmi_munmap+0x1f1/0x2b0 [ 30.582444] mmap_region+0x1f9/0x2660 [ 30.582921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.583415] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.584109] ? __pfx_lock_acquire+0x10/0x10 [ 30.584626] ? __pfx_mmap_region+0x10/0x10 [ 30.585140] ? security_mmap_addr+0x7d/0xa0 [ 30.585652] ? get_unmapped_area+0x1f5/0x3f0 [ 30.586198] do_mmap+0x854/0xf00 [ 30.586623] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.587108] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.587651] ksys_mmap_pgoff+0x3af/0x500 [ 30.588145] do_syscall_64+0x3f/0x90 [ 30.588614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.589228] RIP: 0033:0x7f9406029d82 [ 30.589659] 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 [ 30.591711] RSP: 002b:00007ffd5c9ad2f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.592596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9406029d82 [ 30.593418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9405463000 [ 30.594250] RBP: 00007f9405463000 R08: 0000000000000009 R09: 0000000000001000 [ 30.595072] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628689f6ec0 [ 30.595887] R13: 00007ffd5c9ad310 R14: 00007ffd5c9ad340 R15: 00007ffd5c9ad6a0 [ 30.596689] [ 30.596969] [ 30.597173] Allocated by task 213: [ 30.597583] kasan_save_stack+0x22/0x50 [ 30.598063] kasan_set_track+0x25/0x30 [ 30.598538] __kasan_slab_alloc+0x59/0x70 [ 30.599041] kmem_cache_alloc+0x16b/0x370 [ 30.599531] vm_area_dup+0x20/0x160 [ 30.599962] __split_vma+0x170/0x950 [ 30.600400] split_vma+0xc6/0x110 [ 30.600815] mprotect_fixup+0x8d2/0xb30 [ 30.601317] do_mprotect_pkey+0x87e/0xd40 [ 30.601834] __x64_sys_mprotect+0x78/0xc0 [ 30.602364] do_syscall_64+0x3f/0x90 [ 30.602833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.603460] [ 30.603668] Freed by task 213: [ 30.604051] kasan_save_stack+0x22/0x50 [ 30.604548] kasan_set_track+0x25/0x30 [ 30.605028] kasan_save_free_info+0x2b/0x50 [ 30.605548] __kasan_slab_free+0x10a/0x190 [ 30.606068] kmem_cache_free+0x10d/0x4d0 [ 30.606585] rcu_core+0x8c8/0x2860 [ 30.607013] __do_softirq+0x1b7/0x7d4 [ 30.607488] [ 30.607698] Last potentially related work creation: [ 30.608271] kasan_save_stack+0x22/0x50 [ 30.608767] __kasan_record_aux_stack+0x8e/0xa0 [ 30.609328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.610007] remove_vma+0x139/0x170 [ 30.610441] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.610969] do_vmi_munmap+0x1f1/0x2b0 [ 30.611429] __vm_munmap+0x138/0x3a0 [ 30.611879] __x64_sys_munmap+0x59/0x80 [ 30.612353] do_syscall_64+0x3f/0x90 [ 30.612815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.613442] [ 30.613657] The buggy address belongs to the object at ffff88800fdd41d0 [ 30.613657] which belongs to the cache vm_area_struct of size 168 [ 30.615086] The buggy address is located 88 bytes inside of [ 30.615086] freed 168-byte region [ffff88800fdd41d0, ffff88800fdd4278) [ 30.616446] [ 30.616659] The buggy address belongs to the physical page: [ 30.617296] page:00000000cf25478d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdd4 [ 30.618388] memcg:ffff88801a0bb501 [ 30.618804] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.619428] page_type: 0xffffffff() [ 30.619863] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.620742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0bb501 [ 30.621588] page dumped because: kasan: bad access detected [ 30.622209] [ 30.622417] Memory state around the buggy address: [ 30.622964] ffff88800fdd4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.623799] ffff88800fdd4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.624638] >ffff88800fdd4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.625463] ^ [ 30.626008] ffff88800fdd4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.626865] ffff88800fdd4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.627697] ================================================================== [ 30.628639] Disabling lock debugging due to kernel taint [ 32.786127] BUG: Bad rss-counter state mm:000000003276a5bd type:MM_FILEPAGES val:33 [ 32.787403] BUG: Bad rss-counter state mm:000000003276a5bd type:MM_ANONPAGES val:22 [ 33.268121] BUG: Bad rss-counter state mm:00000000ed775b0e type:MM_FILEPAGES val:33 [ 33.269308] BUG: Bad rss-counter state mm:00000000ed775b0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2293' (ECDSA) to the list of known hosts. 2023/06/20 20:48:47 fuzzer started 2023/06/20 20:48:48 dialing manager at localhost:36067 2023/06/20 20:48:48 checking machine... 2023/06/20 20:48:48 checking revisions... [ 33.995575] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:48:48 testing simple program... [ 34.045352] cgroup: Unknown subsys name 'net' [ 34.088818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:48:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880101d74b8 RSP=ffff8880101d73f0 R8 =ffffffff864b2030 R9 =ffff8880101d74a0 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880101d74c0 R13=ffff8880101d74a8 R14=ffff8880101d74a1 R15=ffff8880101d7460 RIP=ffffffff81130b06 RFL=00000297 [--S-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 00007f4dd5b2a700 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=00007f25a1d8a110 CR3=000000000e4b6000 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=2037343a38343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a38343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f407ce62366 RCX=ffffffff81007b62 RDX=0000000000000001 RSI=0000000000000002 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88801cdcf0d8 R8 =ffffffff864bbb58 R9 =0000000000000002 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88801cdcf220 R13=0000000000000000 R14=ffff88801697d1c0 R15=0000000000092cc0 RIP=ffffffff814c0243 RFL=00000293 [--S-A-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 00007f407c96f900 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=00007ffe639f7000 CR3=000000000b944000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000