syzkaller login: [ 28.769004] BUG: Bad rss-counter state mm:000000006469fd04 type:MM_FILEPAGES val:33 [ 28.770200] BUG: Bad rss-counter state mm:000000006469fd04 type:MM_ANONPAGES val:22 [ 28.935521] ================================================================== [ 28.936454] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.937438] Read of size 8 at addr ffff88800fc18968 by task sshd/220 [ 28.938324] [ 28.938552] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.939452] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.940486] Call Trace: [ 28.940824] <TASK> [ 28.941121] dump_stack_lvl+0x91/0xf0 [ 28.941646] print_report+0xcc/0x620 [ 28.942151] ? __virt_addr_valid+0x102/0x340 [ 28.942727] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.943372] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.944012] kasan_report+0xbe/0xf0 [ 28.944499] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.945133] vma_interval_tree_remove+0xc75/0xec0 [ 28.945776] vma_prepare+0xc54/0x11a0 [ 28.946271] __split_vma+0x5af/0x950 [ 28.946761] ? __pfx___split_vma+0x10/0x10 [ 28.947307] ? find_held_lock+0x2c/0x110 [ 28.947825] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.948398] ? lock_is_held_type+0x9f/0x120 [ 28.948968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.949626] ? mtree_range_walk+0x632/0x900 [ 28.950212] ? mas_walk+0x5c7/0x7c0 [ 28.950717] do_vmi_munmap+0x1f1/0x2b0 [ 28.951242] mmap_region+0x1f9/0x2660 [ 28.951723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.952242] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.952997] ? __pfx_lock_acquire+0x10/0x10 [ 28.953567] ? __pfx_mmap_region+0x10/0x10 [ 28.954131] ? security_mmap_addr+0x7d/0xa0 [ 28.954692] ? get_unmapped_area+0x1f5/0x3f0 [ 28.955272] do_mmap+0x854/0xf00 [ 28.955704] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.956205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.956803] ksys_mmap_pgoff+0x3af/0x500 [ 28.957340] do_syscall_64+0x3f/0x90 [ 28.957880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.958579] RIP: 0033:0x7f3202f44d82 [ 28.959063] 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 [ 28.961338] RSP: 002b:00007ffc709e1d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.962257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3202f44d82 [ 28.963164] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f320237e000 [ 28.964077] RBP: 00007f320237e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.964984] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b914663ec0 [ 28.965844] R13: 00007ffc709e1d40 R14: 00007ffc709e1d70 R15: 00007ffc709e20d0 [ 28.966687] </TASK> [ 28.966974] [ 28.967190] Allocated by task 212: [ 28.967616] kasan_save_stack+0x22/0x50 [ 28.968115] kasan_set_track+0x25/0x30 [ 28.968603] __kasan_slab_alloc+0x59/0x70 [ 28.969119] kmem_cache_alloc+0x16b/0x370 [ 28.969647] vm_area_dup+0x20/0x160 [ 28.970099] __split_vma+0x170/0x950 [ 28.970556] split_vma+0xc6/0x110 [ 28.970991] mprotect_fixup+0x8d2/0xb30 [ 28.971491] do_mprotect_pkey+0x87e/0xd40 [ 28.972008] __x64_sys_mprotect+0x78/0xc0 [ 28.972519] do_syscall_64+0x3f/0x90 [ 28.972996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.973641] [ 28.973854] Freed by task 212: [ 28.974246] kasan_save_stack+0x22/0x50 [ 28.974742] kasan_set_track+0x25/0x30 [ 28.975234] kasan_save_free_info+0x2b/0x50 [ 28.975759] __kasan_slab_free+0x10a/0x190 [ 28.976284] kmem_cache_free+0x10d/0x4d0 [ 28.976790] rcu_core+0x8c8/0x2860 [ 28.977224] __do_softirq+0x1b7/0x7d4 [ 28.977711] [ 28.977924] Last potentially related work creation: [ 28.978497] kasan_save_stack+0x22/0x50 [ 28.978992] __kasan_record_aux_stack+0x8e/0xa0 [ 28.979554] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.980184] remove_vma+0x139/0x170 [ 28.980626] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.981187] do_vmi_munmap+0x1f1/0x2b0 [ 28.981681] __vm_munmap+0x138/0x3a0 [ 28.982139] __x64_sys_munmap+0x59/0x80 [ 28.982625] do_syscall_64+0x3f/0x90 [ 28.983092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.983726] [ 28.983940] The buggy address belongs to the object at ffff88800fc18910 [ 28.983940] which belongs to the cache vm_area_struct of size 168 [ 28.985400] The buggy address is located 88 bytes inside of [ 28.985400] freed 168-byte region [ffff88800fc18910, ffff88800fc189b8) [ 28.986808] [ 28.987024] The buggy address belongs to the physical page: [ 28.987673] page:000000007caa4f81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc18 [ 28.988773] memcg:ffff88800c9eb901 [ 28.989203] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.989917] page_type: 0xffffffff() [ 28.990361] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bb500 dead000000000003 [ 28.991272] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9eb901 [ 28.992185] page dumped because: kasan: bad access detected [ 28.992838] [ 28.993056] Memory state around the buggy address: [ 28.993637] ffff88800fc18800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.994475] ffff88800fc18880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.995317] >ffff88800fc18900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.996149] ^ [ 28.996916] ffff88800fc18980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 28.997771] ffff88800fc18a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.998620] ================================================================== [ 28.999647] Disabling lock debugging due to kernel taint [ 31.576549] BUG: Bad rss-counter state mm:00000000a8f7c7ad type:MM_FILEPAGES val:33 [ 31.577314] BUG: Bad rss-counter state mm:00000000a8f7c7ad type:MM_ANONPAGES val:22 [ 32.030823] BUG: Bad rss-counter state mm:0000000093ea0858 type:MM_FILEPAGES val:33 [ 32.032273] BUG: Bad rss-counter state mm:0000000093ea0858 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9021' (ECDSA) to the list of known hosts. 2023/06/21 00:54:21 fuzzer started 2023/06/21 00:54:21 dialing manager at localhost:36067 2023/06/21 00:54:22 checking machine... 2023/06/21 00:54:22 checking revisions... [ 32.770797] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:54:22 testing simple program... [ 32.817987] cgroup: Unknown subsys name 'net' [ 32.889066] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:54:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880146cfa8c RCX=0000000000000000 RDX=1ffff11002d1a402 RSI=ffffffff81f00e5c RDI=ffff8880168d2010 RBP=0000000000000000 RSP=ffff8880146cf8d8 R8 =0000000000000001 R9 =0000000000000000 R10=ffff8880146cfa70 R11=0000000000000000 R12=1ffff110028d9f1b R13=ffff88800885e780 R14=ffff8880168d2000 R15=ffff8880146cfa8c RIP=ffffffff81f00e98 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 00007f45f3531900 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=0000556ab5ddc568 CR3=000000000c4c6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=3c76e44de16826d000000000000ae988 XMM05=4df8317d107123880000000000132c68 XMM06=ff353c0077f3bfbc0000000000131d10 XMM07=fb795ef6d65770560000000000121898 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00007ffe39379930 RBX=00007ffe39279db0 RCX=0000000000000000 RDX=0000000000000000 RSI=00007ffe39279db0 RDI=0000000000000005 RBP=00007ffe39279d50 RSP=00007ffe39279d20 R8 =0000000000000000 R9 =0000000000000004 R10=00007ffe39279c56 R11=0000000000000000 R12=00007ffe39279db0 R13=00007ffe39279e90 R14=0000000000000002 R15=0000556ab5db28b0 RIP=00007ffe39379943 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fee0c9e2900 00000000 00000000 GS =0000 0000000000000000 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=00007fee0cf97650 CR3=000000000d9e0000 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=25252525252525252525252525252525 XMM01=0000ff00ff0000ff0000ff0000ffff00 XMM02=00000000ff000000000000000000ff00 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=5d64255b00205425206525206825003e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000