syzkaller login: [ 30.767825] BUG: Bad rss-counter state mm:000000002d52fd06 type:MM_FILEPAGES val:33 [ 30.768816] BUG: Bad rss-counter state mm:000000002d52fd06 type:MM_ANONPAGES val:22 [ 30.938688] ================================================================== [ 30.939582] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.940503] Read of size 8 at addr ffff88801a153228 by task sshd/220 [ 30.941271] [ 30.941500] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.942434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.943386] Call Trace: [ 30.943697] [ 30.944003] dump_stack_lvl+0x91/0xf0 [ 30.944481] print_report+0xcc/0x620 [ 30.944957] ? __virt_addr_valid+0x102/0x340 [ 30.945519] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.946133] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.946739] kasan_report+0xbe/0xf0 [ 30.947215] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947825] vma_interval_tree_remove+0xc75/0xec0 [ 30.948428] vma_prepare+0xc54/0x11a0 [ 30.948905] __split_vma+0x5af/0x950 [ 30.949383] ? __pfx___split_vma+0x10/0x10 [ 30.949912] ? find_held_lock+0x2c/0x110 [ 30.950431] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.950992] ? lock_is_held_type+0x9f/0x120 [ 30.951528] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.952127] ? mtree_range_walk+0x632/0x900 [ 30.952676] ? mas_walk+0x5c7/0x7c0 [ 30.953152] do_vmi_munmap+0x1f1/0x2b0 [ 30.953654] mmap_region+0x1f9/0x2660 [ 30.954135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.954644] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.955352] ? __pfx_lock_acquire+0x10/0x10 [ 30.955883] ? __pfx_mmap_region+0x10/0x10 [ 30.956411] ? security_mmap_addr+0x7d/0xa0 [ 30.956936] ? get_unmapped_area+0x1f5/0x3f0 [ 30.957490] do_mmap+0x854/0xf00 [ 30.957932] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.958423] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.958982] ksys_mmap_pgoff+0x3af/0x500 [ 30.959488] do_syscall_64+0x3f/0x90 [ 30.959969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.960610] RIP: 0033:0x7f8f11380d82 [ 30.961065] 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 [ 30.963167] RSP: 002b:00007ffef4a62f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.964067] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f11380d82 [ 30.964911] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f107ba000 [ 30.965757] RBP: 00007f8f107ba000 R08: 0000000000000009 R09: 0000000000001000 [ 30.966585] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1828a9ec0 [ 30.967431] R13: 00007ffef4a62f80 R14: 00007ffef4a62fb0 R15: 00007ffef4a63310 [ 30.968277] [ 30.968569] [ 30.968786] Allocated by task 213: [ 30.969208] kasan_save_stack+0x22/0x50 [ 30.969707] kasan_set_track+0x25/0x30 [ 30.970206] __kasan_slab_alloc+0x59/0x70 [ 30.970724] kmem_cache_alloc+0x16b/0x370 [ 30.971226] vm_area_dup+0x20/0x160 [ 30.971668] __split_vma+0x170/0x950 [ 30.972126] split_vma+0xc6/0x110 [ 30.972553] mprotect_fixup+0x8d2/0xb30 [ 30.973052] do_mprotect_pkey+0x87e/0xd40 [ 30.973576] __x64_sys_mprotect+0x78/0xc0 [ 30.974091] do_syscall_64+0x3f/0x90 [ 30.974551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975182] [ 30.975395] Freed by task 203: [ 30.975785] kasan_save_stack+0x22/0x50 [ 30.976285] kasan_set_track+0x25/0x30 [ 30.976774] kasan_save_free_info+0x2b/0x50 [ 30.977299] __kasan_slab_free+0x10a/0x190 [ 30.977829] kmem_cache_free+0x10d/0x4d0 [ 30.978350] rcu_core+0x8c8/0x2860 [ 30.978799] __do_softirq+0x1b7/0x7d4 [ 30.979287] [ 30.979499] Last potentially related work creation: [ 30.980078] kasan_save_stack+0x22/0x50 [ 30.980579] __kasan_record_aux_stack+0x8e/0xa0 [ 30.981151] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.981800] remove_vma+0x139/0x170 [ 30.982244] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.982797] do_vmi_munmap+0x1f1/0x2b0 [ 30.983281] __vm_munmap+0x138/0x3a0 [ 30.983740] __x64_sys_munmap+0x59/0x80 [ 30.984232] do_syscall_64+0x3f/0x90 [ 30.984703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985343] [ 30.985568] The buggy address belongs to the object at ffff88801a1531d0 [ 30.985568] which belongs to the cache vm_area_struct of size 168 [ 30.987016] The buggy address is located 88 bytes inside of [ 30.987016] freed 168-byte region [ffff88801a1531d0, ffff88801a153278) [ 30.988402] [ 30.988617] The buggy address belongs to the physical page: [ 30.989271] page:00000000a034dbe1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a153 [ 30.990356] memcg:ffff8880145e4901 [ 30.990781] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.991419] page_type: 0xffffffff() [ 30.991871] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.992779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880145e4901 [ 30.993679] page dumped because: kasan: bad access detected [ 30.994317] [ 30.994528] Memory state around the buggy address: [ 30.995096] ffff88801a153100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.995928] ffff88801a153180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.996754] >ffff88801a153200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.997579] ^ [ 30.998120] ffff88801a153280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.998951] ffff88801a153300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.999902] ================================================================== [ 31.000947] Disabling lock debugging due to kernel taint [ 32.964631] BUG: Bad rss-counter state mm:0000000003e6672a type:MM_FILEPAGES val:33 [ 32.966336] BUG: Bad rss-counter state mm:0000000003e6672a type:MM_ANONPAGES val:22 [ 33.483154] BUG: Bad rss-counter state mm:0000000047172d4c type:MM_FILEPAGES val:33 [ 33.484968] BUG: Bad rss-counter state mm:0000000047172d4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18790' (ECDSA) to the list of known hosts. 2023/06/20 21:43:03 fuzzer started 2023/06/20 21:43:03 dialing manager at localhost:36067 2023/06/20 21:43:03 checking machine... 2023/06/20 21:43:03 checking revisions... [ 34.228880] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:43:03 testing simple program... [ 34.285833] cgroup: Unknown subsys name 'net' [ 34.338621] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:43:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc72a369a8 CR3=0000000005482000 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=00007f348c61451000005563c13d5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85dfe5fc RCX=ffffffff8180f5ba RDX=0000000000000002 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff88801476f930 R8 =ffffffff8613971a R9 =ffff88801476fa28 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe5f8 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc68 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 00007f22db0c6900 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=00007fa97b57e650 CR3=000000000d8b4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=221f37baa2e4f80b00000000000ae988 XMM05=f5039a27d2a715f80000000000132570 XMM06=19e9129bd510f2350000000000131408 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000