syzkaller login: [ 40.874965] BUG: Bad rss-counter state mm:00000000e67fee2b type:MM_FILEPAGES val:33 [ 40.876193] BUG: Bad rss-counter state mm:00000000e67fee2b type:MM_ANONPAGES val:22 [ 41.013637] ================================================================== [ 41.014538] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.015444] Read of size 8 at addr ffff888019b2c228 by task sshd/220 [ 41.016181] [ 41.016393] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.017378] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.018311] Call Trace: [ 41.018627] [ 41.018923] dump_stack_lvl+0x91/0xf0 [ 41.019393] print_report+0xcc/0x620 [ 41.019859] ? __virt_addr_valid+0x102/0x340 [ 41.020385] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.020982] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.021584] kasan_report+0xbe/0xf0 [ 41.022041] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.022636] vma_interval_tree_remove+0xc75/0xec0 [ 41.023213] vma_prepare+0xc54/0x11a0 [ 41.023671] __split_vma+0x5af/0x950 [ 41.024130] ? __pfx___split_vma+0x10/0x10 [ 41.024646] ? find_held_lock+0x2c/0x110 [ 41.025155] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.025704] ? lock_is_held_type+0x9f/0x120 [ 41.026227] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.026806] ? mtree_range_walk+0x632/0x900 [ 41.027341] ? mas_walk+0x5c7/0x7c0 [ 41.027794] do_vmi_munmap+0x1f1/0x2b0 [ 41.028271] mmap_region+0x1f9/0x2660 [ 41.028732] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.029232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.029940] ? __pfx_lock_acquire+0x10/0x10 [ 41.030457] ? __pfx_mmap_region+0x10/0x10 [ 41.030972] ? security_mmap_addr+0x7d/0xa0 [ 41.031485] ? get_unmapped_area+0x1f5/0x3f0 [ 41.032021] do_mmap+0x854/0xf00 [ 41.032442] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.032928] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.033483] ksys_mmap_pgoff+0x3af/0x500 [ 41.033972] do_syscall_64+0x3f/0x90 [ 41.034432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.035065] RIP: 0033:0x7f8a595e8d82 [ 41.035506] 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 [ 41.037564] RSP: 002b:00007ffcd5749e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.038443] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a595e8d82 [ 41.039269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a58a22000 [ 41.040083] RBP: 00007f8a58a22000 R08: 0000000000000009 R09: 0000000000001000 [ 41.040900] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a9035dd90 [ 41.041727] R13: 00007ffcd5749e40 R14: 00007ffcd5749e70 R15: 00007ffcd574a1d0 [ 41.042558] [ 41.042843] [ 41.043054] Allocated by task 213: [ 41.043471] kasan_save_stack+0x22/0x50 [ 41.043961] kasan_set_track+0x25/0x30 [ 41.044439] __kasan_slab_alloc+0x59/0x70 [ 41.044945] kmem_cache_alloc+0x16b/0x370 [ 41.045460] vm_area_dup+0x20/0x160 [ 41.045899] __split_vma+0x170/0x950 [ 41.046352] split_vma+0xc6/0x110 [ 41.046780] mprotect_fixup+0x8d2/0xb30 [ 41.047282] do_mprotect_pkey+0x87e/0xd40 [ 41.047783] __x64_sys_mprotect+0x78/0xc0 [ 41.048284] do_syscall_64+0x3f/0x90 [ 41.048746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.049377] [ 41.049585] Freed by task 213: [ 41.049963] kasan_save_stack+0x22/0x50 [ 41.050448] kasan_set_track+0x25/0x30 [ 41.050924] kasan_save_free_info+0x2b/0x50 [ 41.051435] __kasan_slab_free+0x10a/0x190 [ 41.051948] kmem_cache_free+0x10d/0x4d0 [ 41.052437] rcu_core+0x8c8/0x2860 [ 41.052871] __do_softirq+0x1b7/0x7d4 [ 41.053337] [ 41.053550] Last potentially related work creation: [ 41.054116] kasan_save_stack+0x22/0x50 [ 41.054601] __kasan_record_aux_stack+0x8e/0xa0 [ 41.055158] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.055777] remove_vma+0x139/0x170 [ 41.056212] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.056753] do_vmi_munmap+0x1f1/0x2b0 [ 41.057226] __vm_munmap+0x138/0x3a0 [ 41.057682] __x64_sys_munmap+0x59/0x80 [ 41.058169] do_syscall_64+0x3f/0x90 [ 41.058627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.059245] [ 41.059454] The buggy address belongs to the object at ffff888019b2c1d0 [ 41.059454] which belongs to the cache vm_area_struct of size 168 [ 41.060870] The buggy address is located 88 bytes inside of [ 41.060870] freed 168-byte region [ffff888019b2c1d0, ffff888019b2c278) [ 41.062238] [ 41.062450] The buggy address belongs to the physical page: [ 41.063089] page:00000000e4dcf746 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b2c [ 41.064174] memcg:ffff88800ddae001 [ 41.064608] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.065241] page_type: 0xffffffff() [ 41.065706] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.066617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddae001 [ 41.067499] page dumped because: kasan: bad access detected [ 41.068117] [ 41.068321] Memory state around the buggy address: [ 41.068860] ffff888019b2c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.069675] ffff888019b2c180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.070476] >ffff888019b2c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.071270] ^ [ 41.071789] ffff888019b2c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.072586] ffff888019b2c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.073384] ================================================================== [ 41.074716] Disabling lock debugging due to kernel taint [ 43.269626] BUG: Bad rss-counter state mm:00000000673bea02 type:MM_FILEPAGES val:33 [ 43.271141] BUG: Bad rss-counter state mm:00000000673bea02 type:MM_ANONPAGES val:22 [ 43.713099] BUG: Bad rss-counter state mm:0000000097256960 type:MM_FILEPAGES val:33 [ 43.714083] BUG: Bad rss-counter state mm:0000000097256960 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55537' (ECDSA) to the list of known hosts. 2023/06/20 02:45:34 fuzzer started 2023/06/20 02:45:35 dialing manager at localhost:44161 2023/06/20 02:45:35 checking machine... 2023/06/20 02:45:35 checking revisions... [ 44.455416] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:45:35 testing simple program... [ 44.513621] cgroup: Unknown subsys name 'net' [ 44.584501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:45:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010019bc0 RCX=0000000000000000 RDX=1ffff1100200337f RSI=1ffff1100d9c73fd RDI=ffff888010019bf8 RBP=ffff888010019bc0 RSP=ffff8880147c7970 R8 =000000000003ac00 R9 =ffff88806ce3965c R10=0000000000000000 R11=0000000000000001 R12=0000000a4ee19b51 R13=0000000000000000 R14=dffffc0000000000 R15=ffff88806ce39fe8 RIP=ffffffff8124ffd1 RFL=00000046 [---Z-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 00007f7af41e8900 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=00007f7af35f5ab0 CR3=000000000f43a000 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=00000000000000000000000000000000 XMM01=a427db63fc2e1a9dd449f4ac2390644e XMM02=000000000011d6a8eff9b2d0a8fce9cb XMM03=000000000011d7782c67c8bc2e329bc3 XMM04=2a1ae11aa7844dc600000000000ae988 XMM05=19e9129bd510f2350000000000134840 XMM06=790c477cc440ea0e00000000001336a8 XMM07=e042d86d42eb936e0000000000124f30 XMM08=0a2f30694c84764a000000000011d778 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863dcb36 RBX=0000000000000001 RCX=ffffffff863dcb36 RDX=0000000000000000 RSI=ffffffff863dcb36 RDI=ffffffff85fc0370 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff863dcb36 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000091be7 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff81130c4e 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 00007f6211a4a900 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=00007ffd05254000 CR3=000000000e3d0000 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