syzkaller login: [ 32.865795] BUG: Bad rss-counter state mm:000000002d3f88f2 type:MM_FILEPAGES val:33 [ 32.867104] BUG: Bad rss-counter state mm:000000002d3f88f2 type:MM_ANONPAGES val:22 [ 33.034111] ================================================================== [ 33.035231] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.036465] Read of size 8 at addr ffff88800cb3ad08 by task sshd/221 [ 33.037199] [ 33.037407] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.038255] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.039191] Call Trace: [ 33.039494] [ 33.039764] dump_stack_lvl+0x91/0xf0 [ 33.040254] print_report+0xcc/0x620 [ 33.040721] ? __virt_addr_valid+0x102/0x340 [ 33.041260] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.041860] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.042460] kasan_report+0xbe/0xf0 [ 33.042934] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.043521] vma_interval_tree_remove+0xc75/0xec0 [ 33.044113] vma_prepare+0xc54/0x11a0 [ 33.044681] __split_vma+0x5af/0x950 [ 33.045253] ? __pfx___split_vma+0x10/0x10 [ 33.045896] ? find_held_lock+0x2c/0x110 [ 33.046514] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.047204] ? lock_is_held_type+0x9f/0x120 [ 33.047871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.048594] ? mtree_range_walk+0x632/0x900 [ 33.049261] ? mas_walk+0x5c7/0x7c0 [ 33.049834] do_vmi_munmap+0x1f1/0x2b0 [ 33.050432] mmap_region+0x1f9/0x2660 [ 33.051016] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.051625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.052500] ? __pfx_lock_acquire+0x10/0x10 [ 33.053145] ? __pfx_mmap_region+0x10/0x10 [ 33.053770] ? security_mmap_addr+0x7d/0xa0 [ 33.054408] ? get_unmapped_area+0x1f5/0x3f0 [ 33.055083] do_mmap+0x854/0xf00 [ 33.055603] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.056213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.056896] ksys_mmap_pgoff+0x3af/0x500 [ 33.057499] do_syscall_64+0x3f/0x90 [ 33.058073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.058847] RIP: 0033:0x7fba42b0ad82 [ 33.059392] 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 [ 33.062005] RSP: 002b:00007ffd26964458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.063089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba42b0ad82 [ 33.064140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba41f44000 [ 33.065183] RBP: 00007fba41f44000 R08: 0000000000000009 R09: 0000000000001000 [ 33.066183] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559083e9dec0 [ 33.067178] R13: 00007ffd26964470 R14: 00007ffd269644a0 R15: 00007ffd26964800 [ 33.068237] [ 33.068585] [ 33.068834] Allocated by task 214: [ 33.069336] kasan_save_stack+0x22/0x50 [ 33.069929] kasan_set_track+0x25/0x30 [ 33.070510] __kasan_slab_alloc+0x59/0x70 [ 33.071126] kmem_cache_alloc+0x16b/0x370 [ 33.071766] vm_area_dup+0x20/0x160 [ 33.072488] __split_vma+0x170/0x950 [ 33.073209] split_vma+0xc6/0x110 [ 33.073886] mprotect_fixup+0x8d2/0xb30 [ 33.074644] do_mprotect_pkey+0x87e/0xd40 [ 33.075425] __x64_sys_mprotect+0x78/0xc0 [ 33.076306] do_syscall_64+0x3f/0x90 [ 33.077023] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.077880] [ 33.078143] Freed by task 214: [ 33.078607] kasan_save_stack+0x22/0x50 [ 33.079278] kasan_set_track+0x25/0x30 [ 33.079897] kasan_save_free_info+0x2b/0x50 [ 33.080530] __kasan_slab_free+0x10a/0x190 [ 33.081169] kmem_cache_free+0x10d/0x4d0 [ 33.081766] rcu_core+0x8c8/0x2860 [ 33.082297] __do_softirq+0x1b7/0x7d4 [ 33.082876] [ 33.083137] Last potentially related work creation: [ 33.083847] kasan_save_stack+0x22/0x50 [ 33.084446] __kasan_record_aux_stack+0x8e/0xa0 [ 33.085134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.085912] remove_vma+0x139/0x170 [ 33.086448] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.087128] do_vmi_munmap+0x1f1/0x2b0 [ 33.087705] __vm_munmap+0x138/0x3a0 [ 33.088318] __x64_sys_munmap+0x59/0x80 [ 33.088904] do_syscall_64+0x3f/0x90 [ 33.089458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.090211] [ 33.090460] The buggy address belongs to the object at ffff88800cb3acb0 [ 33.090460] which belongs to the cache vm_area_struct of size 168 [ 33.092193] The buggy address is located 88 bytes inside of [ 33.092193] freed 168-byte region [ffff88800cb3acb0, ffff88800cb3ad58) [ 33.093849] [ 33.094098] The buggy address belongs to the physical page: [ 33.094750] page:00000000eff98303 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb3a [ 33.095776] memcg:ffff88800efdc801 [ 33.096184] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.096847] page_type: 0xffffffff() [ 33.097273] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.098149] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efdc801 [ 33.099194] page dumped because: kasan: bad access detected [ 33.099991] [ 33.100241] Memory state around the buggy address: [ 33.100921] ffff88800cb3ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.101924] ffff88800cb3ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.102932] >ffff88800cb3ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.103935] ^ [ 33.104449] ffff88800cb3ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.105451] ffff88800cb3ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.106445] ================================================================== [ 33.107621] Disabling lock debugging due to kernel taint [ 35.251596] BUG: Bad rss-counter state mm:00000000ef5376a2 type:MM_FILEPAGES val:33 [ 35.252795] BUG: Bad rss-counter state mm:00000000ef5376a2 type:MM_ANONPAGES val:22 [ 35.711560] BUG: Bad rss-counter state mm:000000009d5da0e4 type:MM_FILEPAGES val:33 [ 35.713123] BUG: Bad rss-counter state mm:000000009d5da0e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43151' (ECDSA) to the list of known hosts. 2023/06/19 14:46:29 fuzzer started 2023/06/19 14:46:29 dialing manager at localhost:44161 2023/06/19 14:46:29 checking machine... 2023/06/19 14:46:29 checking revisions... [ 36.471945] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:46:29 testing simple program... [ 36.523941] cgroup: Unknown subsys name 'net' [ 36.561203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:46:27 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=0000000000000002 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b30 R15=ffff88806ce09a98 RIP=ffffffff81130bba 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 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=00007f4faa871b70 CR3=0000000016a4c000 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=2038323a36343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a36343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8613751a RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff8613751e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81131162 RFL=00000297 [--S-APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f29d4a27900 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=00007f29d49e0008 CR3=000000001456a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000