syzkaller login: [ 48.761550] BUG: Bad rss-counter state mm:00000000f002bb15 type:MM_FILEPAGES val:33 [ 48.762579] BUG: Bad rss-counter state mm:00000000f002bb15 type:MM_ANONPAGES val:22 [ 48.906529] ================================================================== [ 48.907606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.908895] Read of size 8 at addr ffff88800ca24c20 by task sshd/219 [ 48.909703] [ 48.909919] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.910786] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.911756] Call Trace: [ 48.912075] <TASK> [ 48.912358] dump_stack_lvl+0x91/0xf0 [ 48.912848] print_report+0xcc/0x620 [ 48.913335] ? __virt_addr_valid+0x102/0x340 [ 48.913892] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.914507] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.915124] kasan_report+0xbe/0xf0 [ 48.915616] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.916239] vma_interval_tree_remove+0xc75/0xec0 [ 48.916865] vma_prepare+0xc54/0x11a0 [ 48.917356] __split_vma+0x5af/0x950 [ 48.917861] ? __pfx___split_vma+0x10/0x10 [ 48.918398] ? find_held_lock+0x2c/0x110 [ 48.918937] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.919513] ? lock_is_held_type+0x9f/0x120 [ 48.920070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.920699] ? mtree_range_walk+0x632/0x900 [ 48.921264] ? mas_walk+0x5c7/0x7c0 [ 48.921772] do_vmi_munmap+0x1f1/0x2b0 [ 48.922289] mmap_region+0x1f9/0x2660 [ 48.922786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.923307] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.924055] ? __pfx_lock_acquire+0x10/0x10 [ 48.924606] ? __pfx_mmap_region+0x10/0x10 [ 48.925146] ? security_mmap_addr+0x7d/0xa0 [ 48.925720] ? get_unmapped_area+0x1f5/0x3f0 [ 48.926289] do_mmap+0x854/0xf00 [ 48.926753] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.927273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.927861] ksys_mmap_pgoff+0x3af/0x500 [ 48.928383] do_syscall_64+0x3f/0x90 [ 48.928877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.929556] RIP: 0033:0x7f484e449d82 [ 48.930050] 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 [ 48.932251] RSP: 002b:00007ffcd512f568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.933193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f484e449d82 [ 48.934085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f484d883000 [ 48.934968] RBP: 00007f484d883000 R08: 0000000000000009 R09: 0000000000001000 [ 48.935863] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c67189ec0 [ 48.936752] R13: 00007ffcd512f580 R14: 00007ffcd512f5b0 R15: 00007ffcd512f910 [ 48.937655] </TASK> [ 48.937966] [ 48.938187] Allocated by task 212: [ 48.938624] kasan_save_stack+0x22/0x50 [ 48.939143] kasan_set_track+0x25/0x30 [ 48.939648] __kasan_slab_alloc+0x59/0x70 [ 48.940191] kmem_cache_alloc+0x16b/0x370 [ 48.940718] vm_area_dup+0x20/0x160 [ 48.941184] __split_vma+0x170/0x950 [ 48.941669] split_vma+0xc6/0x110 [ 48.942144] mprotect_fixup+0x8d2/0xb30 [ 48.942674] do_mprotect_pkey+0x87e/0xd40 [ 48.943215] __x64_sys_mprotect+0x78/0xc0 [ 48.943762] do_syscall_64+0x3f/0x90 [ 48.944262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.944933] [ 48.945154] Freed by task 0: [ 48.945540] kasan_save_stack+0x22/0x50 [ 48.946067] kasan_set_track+0x25/0x30 [ 48.946585] kasan_save_free_info+0x2b/0x50 [ 48.947129] __kasan_slab_free+0x10a/0x190 [ 48.947691] kmem_cache_free+0x10d/0x4d0 [ 48.948217] rcu_core+0x8c8/0x2860 [ 48.948687] __do_softirq+0x1b7/0x7d4 [ 48.949177] [ 48.949398] Last potentially related work creation: [ 48.950073] kasan_save_stack+0x22/0x50 [ 48.950594] __kasan_record_aux_stack+0x8e/0xa0 [ 48.951188] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.951849] remove_vma+0x139/0x170 [ 48.952319] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.952894] do_vmi_munmap+0x1f1/0x2b0 [ 48.953404] __vm_munmap+0x138/0x3a0 [ 48.953909] __x64_sys_munmap+0x59/0x80 [ 48.954426] do_syscall_64+0x3f/0x90 [ 48.954912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.955579] [ 48.955803] The buggy address belongs to the object at ffff88800ca24bc8 [ 48.955803] which belongs to the cache vm_area_struct of size 168 [ 48.957350] The buggy address is located 88 bytes inside of [ 48.957350] freed 168-byte region [ffff88800ca24bc8, ffff88800ca24c70) [ 48.958815] [ 48.959035] The buggy address belongs to the physical page: [ 48.959707] page:000000001de42bb6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca24 [ 48.960826] memcg:ffff888017c63901 [ 48.961274] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.961956] page_type: 0xffffffff() [ 48.962419] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.963354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c63901 [ 48.964300] page dumped because: kasan: bad access detected [ 48.964981] [ 48.965199] Memory state around the buggy address: [ 48.965807] ffff88800ca24b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.966788] ffff88800ca24b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 48.967685] >ffff88800ca24c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 48.968574] ^ [ 48.969125] ffff88800ca24c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 48.970018] ffff88800ca24d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 48.970889] ================================================================== [ 48.971913] Disabling lock debugging due to kernel taint [ 50.705135] BUG: Bad rss-counter state mm:000000006355279e type:MM_FILEPAGES val:33 [ 50.706318] BUG: Bad rss-counter state mm:000000006355279e type:MM_ANONPAGES val:22 [ 51.074327] BUG: Bad rss-counter state mm:000000007fa0c0f4 type:MM_FILEPAGES val:33 [ 51.075082] BUG: Bad rss-counter state mm:000000007fa0c0f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56811' (ECDSA) to the list of known hosts. 2023/06/20 04:42:06 fuzzer started 2023/06/20 04:42:06 dialing manager at localhost:44161 2023/06/20 04:42:06 checking machine... 2023/06/20 04:42:06 checking revisions... [ 51.720849] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:42:06 testing simple program... [ 51.752612] cgroup: Unknown subsys name 'net' [ 51.789213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:41:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09a98 RCX=ffffffff864b1a34 RDX=1ffff1100d9c1353 RSI=ffffffff85407e18 RDI=ffff88806ce09a98 RBP=ffffffff85407e18 RSP=ffff88806ce099f0 R8 =ffffffff864b1a38 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b53b8 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffffffff85407e20 R15=ffff88806ce09a98 RIP=ffffffff8113041a 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 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=00007fac16f03ca0 CR3=000000000d9a0000 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=dc503ed0a9da2cbb414917882aee0e41 XMM02=000000000011b938ec2efd57dc4c00df XMM03=0000000000123090daf83cd267d17e3b XMM04=933b38827a456d2200000000000ae988 XMM05=411dc5de900faad20000000000133a60 XMM06=806171799158d9670000000000132b00 XMM07=e042d86d42eb936e0000000000123310 XMM08=daf83cd267d17e3b000000000011b998 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff8386dfa9 RDX=00000000000286df RSI=00000000000286df RDI=ffffffff8658973c RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000000 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000091af6 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff8113078b RFL=00000246 [---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 00007f74badae900 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=00007f74bb365618 CR3=000000001c93c000 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