syzkaller login: [ 95.237596] BUG: Bad rss-counter state mm:00000000d1a871a6 type:MM_FILEPAGES val:33 [ 95.238670] BUG: Bad rss-counter state mm:00000000d1a871a6 type:MM_ANONPAGES val:22 [ 95.404519] ================================================================== [ 95.405376] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 95.406261] Read of size 8 at addr ffff888019dfd058 by task sshd/221 [ 95.406997] [ 95.407206] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 95.408568] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 95.409987] Call Trace: [ 95.410448] [ 95.410883] dump_stack_lvl+0x91/0xf0 [ 95.411562] print_report+0xcc/0x620 [ 95.412150] ? __virt_addr_valid+0x102/0x340 [ 95.412824] ? vma_interval_tree_remove+0xc75/0xec0 [ 95.413583] ? vma_interval_tree_remove+0xc75/0xec0 [ 95.414320] kasan_report+0xbe/0xf0 [ 95.414902] ? vma_interval_tree_remove+0xc75/0xec0 [ 95.415671] vma_interval_tree_remove+0xc75/0xec0 [ 95.416402] vma_prepare+0xc54/0x11a0 [ 95.416979] __split_vma+0x5af/0x950 [ 95.417555] ? __pfx___split_vma+0x10/0x10 [ 95.418203] ? find_held_lock+0x2c/0x110 [ 95.418857] do_vmi_align_munmap+0x2ba/0x11f0 [ 95.419552] ? lock_is_held_type+0x9f/0x120 [ 95.420210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 95.420957] ? mtree_range_walk+0x632/0x900 [ 95.421627] ? mas_walk+0x5c7/0x7c0 [ 95.422186] do_vmi_munmap+0x1f1/0x2b0 [ 95.422787] mmap_region+0x1f9/0x2660 [ 95.423397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 95.424013] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 95.424876] ? __pfx_lock_acquire+0x10/0x10 [ 95.425536] ? __pfx_mmap_region+0x10/0x10 [ 95.426177] ? security_mmap_addr+0x7d/0xa0 [ 95.426832] ? get_unmapped_area+0x1f5/0x3f0 [ 95.427508] do_mmap+0x854/0xf00 [ 95.428039] vm_mmap_pgoff+0x1a6/0x3a0 [ 95.428636] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 95.429305] ksys_mmap_pgoff+0x3af/0x500 [ 95.429910] do_syscall_64+0x3f/0x90 [ 95.430485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 95.431270] RIP: 0033:0x7f75178f4d82 [ 95.431823] 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 [ 95.434436] RSP: 002b:00007ffd0d51d338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 95.435566] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f75178f4d82 [ 95.436603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7516d2e000 [ 95.437647] RBP: 00007f7516d2e000 R08: 0000000000000009 R09: 0000000000001000 [ 95.438681] R10: 0000000000000812 R11: 0000000000000206 R12: 000055795838bd90 [ 95.439722] R13: 00007ffd0d51d350 R14: 00007ffd0d51d380 R15: 00007ffd0d51d6e0 [ 95.440761] [ 95.441121] [ 95.441383] Allocated by task 214: [ 95.441909] kasan_save_stack+0x22/0x50 [ 95.442526] kasan_set_track+0x25/0x30 [ 95.443147] __kasan_slab_alloc+0x59/0x70 [ 95.443774] kmem_cache_alloc+0x16b/0x370 [ 95.444401] vm_area_dup+0x20/0x160 [ 95.444947] __split_vma+0x170/0x950 [ 95.445502] split_vma+0xc6/0x110 [ 95.446026] mprotect_fixup+0x8d2/0xb30 [ 95.446638] do_mprotect_pkey+0x87e/0xd40 [ 95.447264] __x64_sys_mprotect+0x78/0xc0 [ 95.447889] do_syscall_64+0x3f/0x90 [ 95.448449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 95.449303] [ 95.449561] Freed by task 19: [ 95.450039] kasan_save_stack+0x22/0x50 [ 95.450653] kasan_set_track+0x25/0x30 [ 95.451298] kasan_save_free_info+0x2b/0x50 [ 95.451946] __kasan_slab_free+0x10a/0x190 [ 95.452594] kmem_cache_free+0x10d/0x4d0 [ 95.453204] rcu_core+0x8c8/0x2860 [ 95.453739] __do_softirq+0x1b7/0x7d4 [ 95.454309] [ 95.454567] Last potentially related work creation: [ 95.455192] kasan_save_stack+0x22/0x50 [ 95.455675] __kasan_record_aux_stack+0x8e/0xa0 [ 95.456221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 95.456827] remove_vma+0x139/0x170 [ 95.457249] do_vmi_align_munmap+0xd4a/0x11f0 [ 95.457785] do_vmi_munmap+0x1f1/0x2b0 [ 95.458243] __vm_munmap+0x138/0x3a0 [ 95.458692] __x64_sys_munmap+0x59/0x80 [ 95.459186] do_syscall_64+0x3f/0x90 [ 95.459637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 95.460246] [ 95.460451] The buggy address belongs to the object at ffff888019dfd000 [ 95.460451] which belongs to the cache vm_area_struct of size 168 [ 95.461887] The buggy address is located 88 bytes inside of [ 95.461887] freed 168-byte region [ffff888019dfd000, ffff888019dfd0a8) [ 95.463273] [ 95.463486] The buggy address belongs to the physical page: [ 95.464123] page:00000000e99d9b1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dfd [ 95.465195] memcg:ffff88801809b801 [ 95.465611] flags: 0x100000000000200(slab|node=0|zone=1) [ 95.466239] page_type: 0xffffffff() [ 95.466685] raw: 0100000000000200 ffff88800879fc80 ffffea0000376740 dead000000000008 [ 95.467578] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801809b801 [ 95.468597] page dumped because: kasan: bad access detected [ 95.469411] [ 95.469673] Memory state around the buggy address: [ 95.470376] ffff888019dfcf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 95.471439] ffff888019dfcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 95.472488] >ffff888019dfd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 95.473530] ^ [ 95.474398] ffff888019dfd080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 95.475471] ffff888019dfd100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 95.476518] ================================================================== [ 95.477771] Disabling lock debugging due to kernel taint [ 97.836947] BUG: Bad rss-counter state mm:00000000607cb792 type:MM_FILEPAGES val:33 [ 97.838211] BUG: Bad rss-counter state mm:00000000607cb792 type:MM_ANONPAGES val:22 [ 98.254461] BUG: Bad rss-counter state mm:0000000000427765 type:MM_FILEPAGES val:33 [ 98.255769] BUG: Bad rss-counter state mm:0000000000427765 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49351' (ECDSA) to the list of known hosts. 2023/06/20 08:15:55 fuzzer started 2023/06/20 08:15:55 dialing manager at localhost:44161 2023/06/20 08:15:55 checking machine... 2023/06/20 08:15:55 checking revisions... [ 99.083085] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:15:55 testing simple program... [ 99.131980] cgroup: Unknown subsys name 'net' [ 99.182784] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:14:51 Registers: info registers vcpu 0 RAX=1ffff110028bd25f RBX=ffff8880145e92c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880145e92f8 RBP=ffff88800f30c000 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800f30ec80 R14=ffffffff8186b9c5 R15=ffff88800dc4ca80 RIP=ffffffff8184636c 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 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=00007f45c99301c0 CR3=000000000d790000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9974493fe4bc172200000000000ae988 XMM05=67117299d647e959000000000013d8f0 XMM06=c291bd5c70af25b9000000000013c6e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff84531da7 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff84531da7 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888018188000 R15=ffff88800defab30 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 00007f367f3a3900 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=00007f367f95a618 CR3=000000000e5c6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000