syzkaller login: [ 31.456868] BUG: Bad rss-counter state mm:000000001f25e012 type:MM_FILEPAGES val:33 [ 31.458082] BUG: Bad rss-counter state mm:000000001f25e012 type:MM_ANONPAGES val:22 [ 31.496237] ================================================================== [ 31.497210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.498419] Read of size 8 at addr ffff88800ed59058 by task sshd/220 [ 31.499282] [ 31.499512] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.500429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.501490] Call Trace: [ 31.501834] [ 31.502138] dump_stack_lvl+0x91/0xf0 [ 31.502656] print_report+0xcc/0x620 [ 31.503170] ? __virt_addr_valid+0x102/0x340 [ 31.503762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.504430] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.505107] kasan_report+0xbe/0xf0 [ 31.505612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.506272] vma_interval_tree_remove+0xc75/0xec0 [ 31.506921] vma_prepare+0xc54/0x11a0 [ 31.507434] __split_vma+0x5af/0x950 [ 31.508123] ? __pfx___split_vma+0x10/0x10 [ 31.508686] ? find_held_lock+0x2c/0x110 [ 31.509265] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.509871] ? lock_is_held_type+0x9f/0x120 [ 31.510458] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.511116] ? mtree_range_walk+0x632/0x900 [ 31.511706] ? mas_walk+0x5c7/0x7c0 [ 31.512207] do_vmi_munmap+0x1f1/0x2b0 [ 31.512731] mmap_region+0x1f9/0x2660 [ 31.513266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.513819] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.514597] ? __pfx_lock_acquire+0x10/0x10 [ 31.515167] ? __pfx_mmap_region+0x10/0x10 [ 31.515736] ? security_mmap_addr+0x7d/0xa0 [ 31.516313] ? get_unmapped_area+0x1f5/0x3f0 [ 31.516913] do_mmap+0x854/0xf00 [ 31.517420] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.517968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.518587] ksys_mmap_pgoff+0x3af/0x500 [ 31.519149] do_syscall_64+0x3f/0x90 [ 31.519680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.520392] RIP: 0033:0x7fbe28fb1d82 [ 31.520897] 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 [ 31.523286] RSP: 002b:00007ffcb1683488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.524287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe28fb1d82 [ 31.525233] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe283eb000 [ 31.526165] RBP: 00007fbe283eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.527090] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592855eff70 [ 31.528023] R13: 00007ffcb16834a0 R14: 00007ffcb16834d0 R15: 00007ffcb1683830 [ 31.528989] [ 31.529321] [ 31.529552] Allocated by task 213: [ 31.530021] kasan_save_stack+0x22/0x50 [ 31.530583] kasan_set_track+0x25/0x30 [ 31.531129] __kasan_slab_alloc+0x59/0x70 [ 31.531710] kmem_cache_alloc+0x16b/0x370 [ 31.532279] vm_area_dup+0x20/0x160 [ 31.532779] __split_vma+0x170/0x950 [ 31.533303] split_vma+0xc6/0x110 [ 31.533785] mprotect_fixup+0x8d2/0xb30 [ 31.534344] do_mprotect_pkey+0x87e/0xd40 [ 31.534917] __x64_sys_mprotect+0x78/0xc0 [ 31.535496] do_syscall_64+0x3f/0x90 [ 31.536020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.536723] [ 31.536963] Freed by task 213: [ 31.537416] kasan_save_stack+0x22/0x50 [ 31.537973] kasan_set_track+0x25/0x30 [ 31.538517] kasan_save_free_info+0x2b/0x50 [ 31.539111] __kasan_slab_free+0x10a/0x190 [ 31.539703] kmem_cache_free+0x10d/0x4d0 [ 31.540264] rcu_core+0x8c8/0x2860 [ 31.540747] __do_softirq+0x1b7/0x7d4 [ 31.541287] [ 31.541522] Last potentially related work creation: [ 31.542169] kasan_save_stack+0x22/0x50 [ 31.542724] __kasan_record_aux_stack+0x8e/0xa0 [ 31.543364] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.544075] remove_vma+0x139/0x170 [ 31.544576] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.545199] do_vmi_munmap+0x1f1/0x2b0 [ 31.545731] __vm_munmap+0x138/0x3a0 [ 31.546247] __x64_sys_munmap+0x59/0x80 [ 31.546799] do_syscall_64+0x3f/0x90 [ 31.547330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.548033] [ 31.548270] The buggy address belongs to the object at ffff88800ed59000 [ 31.548270] which belongs to the cache vm_area_struct of size 168 [ 31.549900] The buggy address is located 88 bytes inside of [ 31.549900] freed 168-byte region [ffff88800ed59000, ffff88800ed590a8) [ 31.551454] [ 31.551697] The buggy address belongs to the physical page: [ 31.552422] page:00000000d56d7fc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed59 [ 31.553608] memcg:ffff888019d93d01 [ 31.554078] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.554788] page_type: 0xffffffff() [ 31.555294] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.556335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d93d01 [ 31.557333] page dumped because: kasan: bad access detected [ 31.558049] [ 31.558285] Memory state around the buggy address: [ 31.558917] ffff88800ed58f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.559860] ffff88800ed58f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.560783] >ffff88800ed59000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.561718] ^ [ 31.562505] ffff88800ed59080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.563432] ffff88800ed59100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.564376] ================================================================== [ 31.565990] Disabling lock debugging due to kernel taint [ 32.904743] BUG: Bad rss-counter state mm:00000000a99168c3 type:MM_FILEPAGES val:33 [ 32.905839] BUG: Bad rss-counter state mm:00000000a99168c3 type:MM_ANONPAGES val:22 [ 33.285542] BUG: Bad rss-counter state mm:0000000032c852c2 type:MM_FILEPAGES val:33 [ 33.286330] BUG: Bad rss-counter state mm:0000000032c852c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24621' (ECDSA) to the list of known hosts. 2023/06/20 05:47:16 fuzzer started 2023/06/20 05:47:16 dialing manager at localhost:44161 2023/06/20 05:47:16 checking machine... 2023/06/20 05:47:16 checking revisions... [ 33.995505] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:47:16 testing simple program... [ 34.043343] cgroup: Unknown subsys name 'net' [ 34.121331] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:47:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110011aff3a RSI=ffffffff8120674f RDI=ffff888008d7f978 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=000000000000a1ff R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff888008d7f978 RIP=ffffffff8113062c 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=00007f1eaabe4618 CR3=000000000e100000 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=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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f7695284300 CR3=000000000c560000 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=73c0206a33194d8bae4d9ba8a81e8374 XMM02=000000000011f868eff9b2d0a8fce9cb XMM03=000000000011f9382c67c8bc2e329bc3 XMM04=816cec57c8531b7500000000000ae988 XMM05=19e9129bd510f2350000000000133be0 XMM06=445ccb954edb7af90000000000132a48 XMM07=e042d86d42eb936e00000000001242c0 XMM08=2693f416d1de4d81000000000011f938 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000