syzkaller login: [ 31.466622] BUG: Bad rss-counter state mm:000000007e60e16e type:MM_FILEPAGES val:33 [ 31.467256] BUG: Bad rss-counter state mm:000000007e60e16e type:MM_ANONPAGES val:22 [ 31.589403] ================================================================== [ 31.590034] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.590652] Read of size 8 at addr ffff8880140dac20 by task sshd/220 [ 31.591189] [ 31.591343] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.591943] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.592611] Call Trace: [ 31.592839] [ 31.593036] dump_stack_lvl+0x91/0xf0 [ 31.593394] print_report+0xcc/0x620 [ 31.593717] ? __virt_addr_valid+0x102/0x340 [ 31.594230] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.594673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.595079] kasan_report+0xbe/0xf0 [ 31.595403] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.595840] vma_interval_tree_remove+0xc75/0xec0 [ 31.596251] vma_prepare+0xc54/0x11a0 [ 31.596640] __split_vma+0x5af/0x950 [ 31.596965] ? __pfx___split_vma+0x10/0x10 [ 31.597397] ? find_held_lock+0x2c/0x110 [ 31.597750] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.598123] ? lock_is_held_type+0x9f/0x120 [ 31.598476] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.598874] ? mtree_range_walk+0x632/0x900 [ 31.599235] ? mas_walk+0x5c7/0x7c0 [ 31.599550] do_vmi_munmap+0x1f1/0x2b0 [ 31.599886] mmap_region+0x1f9/0x2660 [ 31.600204] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.600564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.601070] ? __pfx_lock_acquire+0x10/0x10 [ 31.601467] ? __pfx_mmap_region+0x10/0x10 [ 31.601827] ? security_mmap_addr+0x7d/0xa0 [ 31.602177] ? get_unmapped_area+0x1f5/0x3f0 [ 31.602547] do_mmap+0x854/0xf00 [ 31.602857] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.603197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.603601] ksys_mmap_pgoff+0x3af/0x500 [ 31.603956] do_syscall_64+0x3f/0x90 [ 31.604287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604736] RIP: 0033:0x7f872d2aad82 [ 31.605051] 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 [ 31.606331] RSP: 002b:00007ffd4b7cbdb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.606830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f872d2aad82 [ 31.607288] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f872c6e4000 [ 31.607752] RBP: 00007f872c6e4000 R08: 0000000000000009 R09: 0000000000001000 [ 31.608215] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560095d09b20 [ 31.608679] R13: 00007ffd4b7cbdd0 R14: 00007ffd4b7cbe00 R15: 00007ffd4b7cc160 [ 31.609149] [ 31.609321] [ 31.609437] Allocated by task 213: [ 31.609667] kasan_save_stack+0x22/0x50 [ 31.609949] kasan_set_track+0x25/0x30 [ 31.610221] __kasan_slab_alloc+0x59/0x70 [ 31.610504] kmem_cache_alloc+0x16b/0x370 [ 31.610786] vm_area_dup+0x20/0x160 [ 31.611034] __split_vma+0x170/0x950 [ 31.611288] split_vma+0xc6/0x110 [ 31.611531] mprotect_fixup+0x8d2/0xb30 [ 31.611806] do_mprotect_pkey+0x87e/0xd40 [ 31.612088] __x64_sys_mprotect+0x78/0xc0 [ 31.612368] do_syscall_64+0x3f/0x90 [ 31.612632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.612990] [ 31.613108] Freed by task 213: [ 31.613331] kasan_save_stack+0x22/0x50 [ 31.613605] kasan_set_track+0x25/0x30 [ 31.613877] kasan_save_free_info+0x2b/0x50 [ 31.614171] __kasan_slab_free+0x10a/0x190 [ 31.614463] kmem_cache_free+0x10d/0x4d0 [ 31.614741] rcu_core+0x8c8/0x2860 [ 31.614989] __do_softirq+0x1b7/0x7d4 [ 31.615251] [ 31.615369] Last potentially related work creation: [ 31.615691] kasan_save_stack+0x22/0x50 [ 31.615964] __kasan_record_aux_stack+0x8e/0xa0 [ 31.616281] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.616635] remove_vma+0x139/0x170 [ 31.616880] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.617183] do_vmi_munmap+0x1f1/0x2b0 [ 31.621712] __vm_munmap+0x138/0x3a0 [ 31.622039] __x64_sys_munmap+0x59/0x80 [ 31.622375] do_syscall_64+0x3f/0x90 [ 31.622691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.623113] [ 31.623258] The buggy address belongs to the object at ffff8880140dabc8 [ 31.623258] which belongs to the cache vm_area_struct of size 168 [ 31.624318] The buggy address is located 88 bytes inside of [ 31.624318] freed 168-byte region [ffff8880140dabc8, ffff8880140dac70) [ 31.625331] [ 31.625474] The buggy address belongs to the physical page: [ 31.625904] page:000000008a48e91b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x140da [ 31.626607] memcg:ffff88801a27d301 [ 31.626900] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.627328] page_type: 0xffffffff() [ 31.627635] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.628330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a27d301 [ 31.628951] page dumped because: kasan: bad access detected [ 31.629430] [ 31.629572] Memory state around the buggy address: [ 31.629956] ffff8880140dab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.630516] ffff8880140dab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.631126] >ffff8880140dac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.631667] ^ [ 31.632038] ffff8880140dac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.632598] ffff8880140dad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.633158] ================================================================== [ 31.633880] Disabling lock debugging due to kernel taint [ 33.607703] BUG: Bad rss-counter state mm:000000005cb2d76c type:MM_FILEPAGES val:33 [ 33.608457] BUG: Bad rss-counter state mm:000000005cb2d76c type:MM_ANONPAGES val:22 [ 33.966091] BUG: Bad rss-counter state mm:0000000022db5ec5 type:MM_FILEPAGES val:33 [ 33.966825] BUG: Bad rss-counter state mm:0000000022db5ec5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1702' (ECDSA) to the list of known hosts. 2023/06/21 09:28:32 fuzzer started 2023/06/21 09:28:32 dialing manager at localhost:36067 2023/06/21 09:28:32 checking machine... 2023/06/21 09:28:32 checking revisions... [ 34.542198] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:28:32 testing simple program... [ 34.577668] cgroup: Unknown subsys name 'net' [ 34.633765] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:28:32 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888015d374b8 RSI=ffff888015d37480 RDI=ffff88806ce09a78 RBP=ffff888015d30000 RSP=ffff88806ce09a38 R8 =0000000000000001 R9 =ffff88806ce09aa8 R10=0000000000038001 R11=00000000000b3bfc R12=ffff88806ce09ac8 R13=ffff88806ce09ab0 R14=ffff888015d37480 R15=ffff88806ce09a68 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 00007fcca7bc5900 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=00007fcca7ba4020 CR3=000000001ca04000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007fbf4f019810 CR3=00000000140a6000 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=2032333a38323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a38323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000