syzkaller login: [ 38.544143] BUG: Bad rss-counter state mm:00000000d7a53dc8 type:MM_FILEPAGES val:33 [ 38.545692] BUG: Bad rss-counter state mm:00000000d7a53dc8 type:MM_ANONPAGES val:22 [ 38.681246] ================================================================== [ 38.682373] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.683529] Read of size 8 at addr ffff88800f174c20 by task sshd/221 [ 38.684609] [ 38.684905] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.685824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.686795] Call Trace: [ 38.687114] [ 38.687405] dump_stack_lvl+0x91/0xf0 [ 38.687891] print_report+0xcc/0x620 [ 38.688370] ? __virt_addr_valid+0x102/0x340 [ 38.688940] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.689564] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.690196] kasan_report+0xbe/0xf0 [ 38.690673] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.691290] vma_interval_tree_remove+0xc75/0xec0 [ 38.691892] vma_prepare+0xc54/0x11a0 [ 38.692384] __split_vma+0x5af/0x950 [ 38.692876] ? __pfx___split_vma+0x10/0x10 [ 38.693412] ? find_held_lock+0x2c/0x110 [ 38.693927] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.694498] ? lock_is_held_type+0x9f/0x120 [ 38.695044] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.695650] ? mtree_range_walk+0x632/0x900 [ 38.696202] ? mas_walk+0x5c7/0x7c0 [ 38.696701] do_vmi_munmap+0x1f1/0x2b0 [ 38.697195] mmap_region+0x1f9/0x2660 [ 38.697683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.698199] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.698915] ? __pfx_lock_acquire+0x10/0x10 [ 38.699448] ? __pfx_mmap_region+0x10/0x10 [ 38.699984] ? security_mmap_addr+0x7d/0xa0 [ 38.700529] ? get_unmapped_area+0x1f5/0x3f0 [ 38.701111] do_mmap+0x854/0xf00 [ 38.701552] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.702048] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.702614] ksys_mmap_pgoff+0x3af/0x500 [ 38.703117] do_syscall_64+0x3f/0x90 [ 38.703594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.704244] RIP: 0033:0x7fb9b6c21d82 [ 38.704733] 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 [ 38.706873] RSP: 002b:00007ffe7b7f15b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.707787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9b6c21d82 [ 38.708646] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9b605b000 [ 38.709511] RBP: 00007fb9b605b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.710375] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b826122ec0 [ 38.711218] R13: 00007ffe7b7f15d0 R14: 00007ffe7b7f1600 R15: 00007ffe7b7f1960 [ 38.712092] [ 38.712383] [ 38.712599] Allocated by task 214: [ 38.713036] kasan_save_stack+0x22/0x50 [ 38.713541] kasan_set_track+0x25/0x30 [ 38.714040] __kasan_slab_alloc+0x59/0x70 [ 38.714563] kmem_cache_alloc+0x16b/0x370 [ 38.715083] vm_area_dup+0x20/0x160 [ 38.715539] __split_vma+0x170/0x950 [ 38.716008] split_vma+0xc6/0x110 [ 38.716446] mprotect_fixup+0x8d2/0xb30 [ 38.716969] do_mprotect_pkey+0x87e/0xd40 [ 38.717494] __x64_sys_mprotect+0x78/0xc0 [ 38.718015] do_syscall_64+0x3f/0x90 [ 38.718486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.719126] [ 38.719342] Freed by task 214: [ 38.719741] kasan_save_stack+0x22/0x50 [ 38.720251] kasan_set_track+0x25/0x30 [ 38.720762] kasan_save_free_info+0x2b/0x50 [ 38.721298] __kasan_slab_free+0x10a/0x190 [ 38.721837] kmem_cache_free+0x10d/0x4d0 [ 38.722362] rcu_core+0x8c8/0x2860 [ 38.722809] __do_softirq+0x1b7/0x7d4 [ 38.723289] [ 38.723509] Last potentially related work creation: [ 38.724100] kasan_save_stack+0x22/0x50 [ 38.724612] __kasan_record_aux_stack+0x8e/0xa0 [ 38.725207] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.725853] remove_vma+0x139/0x170 [ 38.726310] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.726864] do_vmi_munmap+0x1f1/0x2b0 [ 38.727347] __vm_munmap+0x138/0x3a0 [ 38.727825] __x64_sys_munmap+0x59/0x80 [ 38.728320] do_syscall_64+0x3f/0x90 [ 38.728801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.729441] [ 38.729657] The buggy address belongs to the object at ffff88800f174bc8 [ 38.729657] which belongs to the cache vm_area_struct of size 168 [ 38.731140] The buggy address is located 88 bytes inside of [ 38.731140] freed 168-byte region [ffff88800f174bc8, ffff88800f174c70) [ 38.732592] [ 38.732822] The buggy address belongs to the physical page: [ 38.733491] page:000000006e5e45e9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf174 [ 38.734578] memcg:ffff88800974f101 [ 38.735007] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.735654] page_type: 0xffffffff() [ 38.736103] raw: 0100000000000200 ffff88800879fc80 ffffea000034e240 dead000000000004 [ 38.737047] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800974f101 [ 38.737957] page dumped because: kasan: bad access detected [ 38.738619] [ 38.738834] Memory state around the buggy address: [ 38.739412] ffff88800f174b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.740275] ffff88800f174b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.741146] >ffff88800f174c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.742008] ^ [ 38.742541] ffff88800f174c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.743407] ffff88800f174d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.744255] ================================================================== [ 38.745387] Disabling lock debugging due to kernel taint [ 40.720555] BUG: Bad rss-counter state mm:000000005d6a5d02 type:MM_FILEPAGES val:33 [ 40.722155] BUG: Bad rss-counter state mm:000000005d6a5d02 type:MM_ANONPAGES val:22 [ 41.207663] BUG: Bad rss-counter state mm:00000000c2ed89a1 type:MM_FILEPAGES val:33 [ 41.208923] BUG: Bad rss-counter state mm:00000000c2ed89a1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15145' (ECDSA) to the list of known hosts. 2023/06/19 19:45:16 fuzzer started 2023/06/19 19:45:17 dialing manager at localhost:44161 2023/06/19 19:45:17 checking machine... 2023/06/19 19:45:17 checking revisions... [ 41.911212] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:45:17 testing simple program... [ 41.956505] cgroup: Unknown subsys name 'net' [ 42.040607] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:45:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=1ffff110028a7eb5 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801453f600 RSP=ffff88801453f538 R8 =ffffffff860d68fa R9 =ffff88801453f5e8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88801453f608 R13=ffff88801453f5f0 R14=ffff88801453f6e0 R15=ffff88801453f5a8 RIP=ffffffff81131271 RFL=00000212 [----A--] 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 00007f006b323900 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=00007f815785a650 CR3=000000000d818000 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=627a94c9f4a2609ca443ed3c900ab277 XMM02=0000000000120148eff9b2d0a8fce9cb XMM03=00000000001202182c67c8bc2e329bc3 XMM04=a5db04c71a262ad900000000000ae988 XMM05=912ff2a0c197102d00000000001355e0 XMM06=c291bd5c70af25b900000000001343d0 XMM07=fb795ef6d65770560000000000124958 XMM08=2c67c8bc2e329bc300000000001201b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85e03a38 RCX=ffffffff8186c1c4 RDX=0000000000000000 RSI=ffffffff86141d62 RDI=ffffffff85e03a38 RBP=ffffffff85e03a3c RSP=ffff888018fcf930 R8 =ffffffff86141d62 R9 =ffff888018fcfa28 R10=0000000000038001 R11=0000000000022999 R12=ffffffff85e03a38 R13=ffffffff85e03a38 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcaf RFL=00000256 [---ZAP-] 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 00007f81572a5900 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=00007f815785d0b0 CR3=000000000ec7c000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000