syzkaller login: [ 38.778935] BUG: Bad rss-counter state mm:000000006dd38522 type:MM_FILEPAGES val:33 [ 38.780247] BUG: Bad rss-counter state mm:000000006dd38522 type:MM_ANONPAGES val:22 [ 38.946417] ================================================================== [ 38.947355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.948296] Read of size 8 at addr ffff8880168b1d08 by task sshd/221 [ 38.949154] [ 38.949376] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.950241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.951239] Call Trace: [ 38.951562] [ 38.951849] dump_stack_lvl+0x91/0xf0 [ 38.952340] print_report+0xcc/0x620 [ 38.952828] ? __virt_addr_valid+0x102/0x340 [ 38.953391] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954012] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.954632] kasan_report+0xbe/0xf0 [ 38.955144] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.955779] vma_interval_tree_remove+0xc75/0xec0 [ 38.956389] vma_prepare+0xc54/0x11a0 [ 38.956876] __split_vma+0x5af/0x950 [ 38.957353] ? __pfx___split_vma+0x10/0x10 [ 38.957893] ? find_held_lock+0x2c/0x110 [ 38.958429] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.959000] ? lock_is_held_type+0x9f/0x120 [ 38.959554] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.960170] ? mtree_range_walk+0x632/0x900 [ 38.960738] ? mas_walk+0x5c7/0x7c0 [ 38.961221] do_vmi_munmap+0x1f1/0x2b0 [ 38.961727] mmap_region+0x1f9/0x2660 [ 38.962220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.962749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.963477] ? __pfx_lock_acquire+0x10/0x10 [ 38.964017] ? __pfx_mmap_region+0x10/0x10 [ 38.964560] ? security_mmap_addr+0x7d/0xa0 [ 38.965090] ? get_unmapped_area+0x1f5/0x3f0 [ 38.965661] do_mmap+0x854/0xf00 [ 38.966113] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.966621] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.967219] ksys_mmap_pgoff+0x3af/0x500 [ 38.967738] do_syscall_64+0x3f/0x90 [ 38.968229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.968898] RIP: 0033:0x7f9df89d9d82 [ 38.969369] 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 [ 38.971550] RSP: 002b:00007ffd5afbd788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.972478] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9df89d9d82 [ 38.973334] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9df7e13000 [ 38.974207] RBP: 00007f9df7e13000 R08: 0000000000000009 R09: 0000000000001000 [ 38.975111] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb610e9ec0 [ 38.975994] R13: 00007ffd5afbd7a0 R14: 00007ffd5afbd7d0 R15: 00007ffd5afbdb30 [ 38.976907] [ 38.977214] [ 38.977438] Allocated by task 214: [ 38.977884] kasan_save_stack+0x22/0x50 [ 38.978422] kasan_set_track+0x25/0x30 [ 38.978960] __kasan_slab_alloc+0x59/0x70 [ 38.979518] kmem_cache_alloc+0x16b/0x370 [ 38.980060] vm_area_dup+0x20/0x160 [ 38.980532] __split_vma+0x170/0x950 [ 38.981028] split_vma+0xc6/0x110 [ 38.981492] mprotect_fixup+0x8d2/0xb30 [ 38.982015] do_mprotect_pkey+0x87e/0xd40 [ 38.982573] __x64_sys_mprotect+0x78/0xc0 [ 38.983143] do_syscall_64+0x3f/0x90 [ 38.983656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.984343] [ 38.984572] Freed by task 214: [ 38.984996] kasan_save_stack+0x22/0x50 [ 38.985530] kasan_set_track+0x25/0x30 [ 38.986061] kasan_save_free_info+0x2b/0x50 [ 38.986639] __kasan_slab_free+0x10a/0x190 [ 38.987221] kmem_cache_free+0x10d/0x4d0 [ 38.987768] rcu_core+0x8c8/0x2860 [ 38.988252] __do_softirq+0x1b7/0x7d4 [ 38.988740] [ 38.988961] Last potentially related work creation: [ 38.989578] kasan_save_stack+0x22/0x50 [ 38.990116] __kasan_record_aux_stack+0x8e/0xa0 [ 38.990732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.991421] remove_vma+0x139/0x170 [ 38.991902] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.992496] do_vmi_munmap+0x1f1/0x2b0 [ 38.993017] __vm_munmap+0x138/0x3a0 [ 38.993519] __x64_sys_munmap+0x59/0x80 [ 38.994053] do_syscall_64+0x3f/0x90 [ 38.994567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.995281] [ 38.995512] The buggy address belongs to the object at ffff8880168b1cb0 [ 38.995512] which belongs to the cache vm_area_struct of size 168 [ 38.997104] The buggy address is located 88 bytes inside of [ 38.997104] freed 168-byte region [ffff8880168b1cb0, ffff8880168b1d58) [ 38.998604] [ 38.998829] The buggy address belongs to the physical page: [ 38.999517] page:000000004ac7ebe3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168b1 [ 39.000700] memcg:ffff8880168b2001 [ 39.001158] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.001862] page_type: 0xffffffff() [ 39.002352] raw: 0100000000000200 ffff8880087a0c80 ffffea000059a880 dead000000000006 [ 39.003366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168b2001 [ 39.004341] page dumped because: kasan: bad access detected [ 39.005040] [ 39.005271] Memory state around the buggy address: [ 39.005943] ffff8880168b1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.006879] ffff8880168b1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.007790] >ffff8880168b1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.008672] ^ [ 39.009114] ffff8880168b1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.010019] ffff8880168b1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.010938] ================================================================== [ 39.012008] Disabling lock debugging due to kernel taint [ 40.901759] BUG: Bad rss-counter state mm:00000000da47b742 type:MM_FILEPAGES val:33 [ 40.902687] BUG: Bad rss-counter state mm:00000000da47b742 type:MM_ANONPAGES val:22 [ 41.355766] BUG: Bad rss-counter state mm:00000000776f756a type:MM_FILEPAGES val:33 [ 41.356801] BUG: Bad rss-counter state mm:00000000776f756a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29458' (ECDSA) to the list of known hosts. 2023/06/21 00:31:55 fuzzer started 2023/06/21 00:31:56 dialing manager at localhost:36067 2023/06/21 00:31:56 checking machine... 2023/06/21 00:31:56 checking revisions... [ 42.132826] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:31:56 testing simple program... [ 42.180664] cgroup: Unknown subsys name 'net' [ 42.218065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:31:55 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=000000000dcd9680 RSP=ffff8880142a79e0 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00000000000b6a61 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=1ffff11002854f4b R15=dffffc0000000000 RIP=ffffffff8114325d 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 00007f959e892900 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=00007f06745b8650 CR3=000000000d6c2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f67321ff2376e4d300000000000ae988 XMM05=9f36b8e50036b7520000000000133058 XMM06=c291bd5c70af25b90000000000131ad8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff81370a89 RDX=000000000000370a RSI=000000000000370a RDI=ffffffff864f7618 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000000 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff8113077a RFL=00000216 [----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 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=00007f5ed06c0260 CR3=000000000e7fc000 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=756e696c2d34365f3638782f62696c2f XMM01=7075733562726b62696c2f756e672d78 XMM02=00302e6f732e74726f70707573356272 XMM03=6b62696c2f756e672d78756e696c2d34 XMM04=00000000000000000000000000000000 XMM05=00007f5ed0bedf6000007f5ed09d0f30 XMM06=00007f5ed09d0a2000007f5ed09d0510 XMM07=00007f5ed09d000000007f5ed0beea20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000