syzkaller login: [ 30.917730] BUG: Bad rss-counter state mm:0000000068c269f4 type:MM_FILEPAGES val:33 [ 30.918496] BUG: Bad rss-counter state mm:0000000068c269f4 type:MM_ANONPAGES val:22 [ 31.047128] ================================================================== [ 31.047762] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.048374] Read of size 8 at addr ffff8880166da798 by task sshd/221 [ 31.048877] [ 31.049021] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.049601] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.050232] Call Trace: [ 31.050442] [ 31.050623] dump_stack_lvl+0x91/0xf0 [ 31.050975] print_report+0xcc/0x620 [ 31.051310] ? __virt_addr_valid+0x102/0x340 [ 31.051841] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052278] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052713] kasan_report+0xbe/0xf0 [ 31.053026] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053440] vma_interval_tree_remove+0xc75/0xec0 [ 31.053857] vma_prepare+0xc54/0x11a0 [ 31.054188] __split_vma+0x5af/0x950 [ 31.054516] ? __pfx___split_vma+0x10/0x10 [ 31.054963] ? find_held_lock+0x2c/0x110 [ 31.055325] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.055707] ? lock_is_held_type+0x9f/0x120 [ 31.056083] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.056532] ? mtree_range_walk+0x632/0x900 [ 31.056916] ? mas_walk+0x5c7/0x7c0 [ 31.057243] do_vmi_munmap+0x1f1/0x2b0 [ 31.057587] mmap_region+0x1f9/0x2660 [ 31.057928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.058285] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.058807] ? __pfx_lock_acquire+0x10/0x10 [ 31.059176] ? __pfx_mmap_region+0x10/0x10 [ 31.059546] ? security_mmap_addr+0x7d/0xa0 [ 31.059917] ? get_unmapped_area+0x1f5/0x3f0 [ 31.060298] do_mmap+0x854/0xf00 [ 31.060601] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.060947] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.061344] ksys_mmap_pgoff+0x3af/0x500 [ 31.061705] do_syscall_64+0x3f/0x90 [ 31.062041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.062494] RIP: 0033:0x7f6ae8e51d82 [ 31.062837] 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 [ 31.064309] RSP: 002b:00007ffef914aa68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.064931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ae8e51d82 [ 31.065512] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ae828b000 [ 31.066093] RBP: 00007f6ae828b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.066682] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c628878d90 [ 31.067298] R13: 00007ffef914aa80 R14: 00007ffef914aab0 R15: 00007ffef914ae10 [ 31.067892] [ 31.068094] [ 31.068243] Allocated by task 214: [ 31.068542] kasan_save_stack+0x22/0x50 [ 31.068909] kasan_set_track+0x25/0x30 [ 31.069249] __kasan_slab_alloc+0x59/0x70 [ 31.069602] kmem_cache_alloc+0x16b/0x370 [ 31.069951] vm_area_dup+0x20/0x160 [ 31.070267] __split_vma+0x170/0x950 [ 31.070590] split_vma+0xc6/0x110 [ 31.070915] mprotect_fixup+0x8d2/0xb30 [ 31.071296] do_mprotect_pkey+0x87e/0xd40 [ 31.071652] __x64_sys_mprotect+0x78/0xc0 [ 31.072012] do_syscall_64+0x3f/0x90 [ 31.072385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.072836] [ 31.072991] Freed by task 214: [ 31.073269] kasan_save_stack+0x22/0x50 [ 31.073624] kasan_set_track+0x25/0x30 [ 31.073968] kasan_save_free_info+0x2b/0x50 [ 31.074333] __kasan_slab_free+0x10a/0x190 [ 31.074702] kmem_cache_free+0x10d/0x4d0 [ 31.075076] rcu_core+0x8c8/0x2860 [ 31.075377] __do_softirq+0x1b7/0x7d4 [ 31.075713] [ 31.075867] Last potentially related work creation: [ 31.076274] kasan_save_stack+0x22/0x50 [ 31.076623] __kasan_record_aux_stack+0x8e/0xa0 [ 31.077037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.077496] remove_vma+0x139/0x170 [ 31.077821] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.078213] do_vmi_munmap+0x1f1/0x2b0 [ 31.078558] __vm_munmap+0x138/0x3a0 [ 31.078927] __x64_sys_munmap+0x59/0x80 [ 31.079275] do_syscall_64+0x3f/0x90 [ 31.079609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.080058] [ 31.080215] The buggy address belongs to the object at ffff8880166da740 [ 31.080215] which belongs to the cache vm_area_struct of size 168 [ 31.081213] The buggy address is located 88 bytes inside of [ 31.081213] freed 168-byte region [ffff8880166da740, ffff8880166da7e8) [ 31.082213] [ 31.082370] The buggy address belongs to the physical page: [ 31.082836] page:00000000798c66a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166da [ 31.083599] memcg:ffff88800dc70a01 [ 31.083909] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.084349] page_type: 0xffffffff() [ 31.084675] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.085305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc70a01 [ 31.085938] page dumped because: kasan: bad access detected [ 31.086395] [ 31.086550] Memory state around the buggy address: [ 31.086981] ffff8880166da680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.087583] ffff8880166da700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.088194] >ffff8880166da780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.088798] ^ [ 31.089145] ffff8880166da800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.089753] ffff8880166da880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.090353] ================================================================== [ 31.091169] Disabling lock debugging due to kernel taint [ 32.545163] BUG: Bad rss-counter state mm:000000002268836e type:MM_FILEPAGES val:33 [ 32.546314] BUG: Bad rss-counter state mm:000000002268836e type:MM_ANONPAGES val:22 [ 32.888645] BUG: Bad rss-counter state mm:0000000036ae23e8 type:MM_FILEPAGES val:33 [ 32.889310] BUG: Bad rss-counter state mm:0000000036ae23e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13501' (ECDSA) to the list of known hosts. 2023/06/21 09:33:12 fuzzer started 2023/06/21 09:33:12 dialing manager at localhost:36067 2023/06/21 09:33:12 checking machine... 2023/06/21 09:33:12 checking revisions... [ 33.452344] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:33:12 testing simple program... [ 33.485903] cgroup: Unknown subsys name 'net' [ 33.522694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:33:12 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff888019219d80 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535fa3 RBP=ffff888019219fb0 RSP=ffff88800f087c38 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888019219fb0 R13=ffff888019219da8 R14=ffffffff84d2ed20 R15=ffff888019219e58 RIP=ffffffff84535fab 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 00007fda14ec9900 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=00007fda15480618 CR3=000000001ccd2000 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=563412feff00545000000000000080fe 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 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=ffff888008c04400 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=00007fc0946eba80 CR3=000000000cdac000 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=2032313a33333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a33333a3930203132 XMM08=7020303d64696720303d64697520612f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000