syzkaller login: [ 29.599576] BUG: Bad rss-counter state mm:000000008104d821 type:MM_FILEPAGES val:33 [ 29.601394] BUG: Bad rss-counter state mm:000000008104d821 type:MM_ANONPAGES val:22 [ 29.783452] ================================================================== [ 29.784464] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.785568] Read of size 8 at addr ffff888016af2d08 by task sshd/222 [ 29.786520] [ 29.786982] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.788084] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.789021] Call Trace: [ 29.789354] [ 29.789633] dump_stack_lvl+0x91/0xf0 [ 29.790109] print_report+0xcc/0x620 [ 29.790587] ? __virt_addr_valid+0x102/0x340 [ 29.791138] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.791732] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.792342] kasan_report+0xbe/0xf0 [ 29.792797] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.793413] vma_interval_tree_remove+0xc75/0xec0 [ 29.793989] vma_prepare+0xc54/0x11a0 [ 29.794465] __split_vma+0x5af/0x950 [ 29.794927] ? __pfx___split_vma+0x10/0x10 [ 29.795474] ? find_held_lock+0x2c/0x110 [ 29.796016] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.796630] ? lock_is_held_type+0x9f/0x120 [ 29.797212] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.797827] ? mtree_range_walk+0x632/0x900 [ 29.798413] ? mas_walk+0x5c7/0x7c0 [ 29.798901] do_vmi_munmap+0x1f1/0x2b0 [ 29.799454] mmap_region+0x1f9/0x2660 [ 29.799964] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.800517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.801273] ? __pfx_lock_acquire+0x10/0x10 [ 29.801842] ? __pfx_mmap_region+0x10/0x10 [ 29.802405] ? security_mmap_addr+0x7d/0xa0 [ 29.802960] ? get_unmapped_area+0x1f5/0x3f0 [ 29.803543] do_mmap+0x854/0xf00 [ 29.803975] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.804457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.805011] ksys_mmap_pgoff+0x3af/0x500 [ 29.805509] do_syscall_64+0x3f/0x90 [ 29.805984] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.806609] RIP: 0033:0x7f52862c9d82 [ 29.807060] 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 [ 29.809179] RSP: 002b:00007fffb8df5378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.810062] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f52862c9d82 [ 29.810886] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5285703000 [ 29.811754] RBP: 00007f5285703000 R08: 0000000000000009 R09: 0000000000001000 [ 29.812592] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c486fcf70 [ 29.813473] R13: 00007fffb8df5390 R14: 00007fffb8df53c0 R15: 00007fffb8df5720 [ 29.814359] [ 29.814657] [ 29.814878] Allocated by task 215: [ 29.815335] kasan_save_stack+0x22/0x50 [ 29.815858] kasan_set_track+0x25/0x30 [ 29.816368] __kasan_slab_alloc+0x59/0x70 [ 29.816909] kmem_cache_alloc+0x16b/0x370 [ 29.817448] vm_area_dup+0x20/0x160 [ 29.817921] __split_vma+0x170/0x950 [ 29.818400] split_vma+0xc6/0x110 [ 29.818851] mprotect_fixup+0x8d2/0xb30 [ 29.819401] do_mprotect_pkey+0x87e/0xd40 [ 29.819938] __x64_sys_mprotect+0x78/0xc0 [ 29.820471] do_syscall_64+0x3f/0x90 [ 29.820964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.821618] [ 29.821851] Freed by task 212: [ 29.822258] kasan_save_stack+0x22/0x50 [ 29.822781] kasan_set_track+0x25/0x30 [ 29.823317] kasan_save_free_info+0x2b/0x50 [ 29.823859] __kasan_slab_free+0x10a/0x190 [ 29.824405] kmem_cache_free+0x10d/0x4d0 [ 29.824927] rcu_core+0x8c8/0x2860 [ 29.825384] __do_softirq+0x1b7/0x7d4 [ 29.825873] [ 29.826093] Last potentially related work creation: [ 29.826698] kasan_save_stack+0x22/0x50 [ 29.827249] __kasan_record_aux_stack+0x8e/0xa0 [ 29.827942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.828634] remove_vma+0x139/0x170 [ 29.829117] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.829713] do_vmi_munmap+0x1f1/0x2b0 [ 29.830226] __vm_munmap+0x138/0x3a0 [ 29.830725] __x64_sys_munmap+0x59/0x80 [ 29.831291] do_syscall_64+0x3f/0x90 [ 29.831798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.832477] [ 29.832712] The buggy address belongs to the object at ffff888016af2cb0 [ 29.832712] which belongs to the cache vm_area_struct of size 168 [ 29.834246] The buggy address is located 88 bytes inside of [ 29.834246] freed 168-byte region [ffff888016af2cb0, ffff888016af2d58) [ 29.835784] [ 29.836010] The buggy address belongs to the physical page: [ 29.836670] page:00000000b66a57b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16af2 [ 29.837775] memcg:ffff888008eec301 [ 29.838203] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.838832] page_type: 0xffffffff() [ 29.839197] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.839955] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008eec301 [ 29.840678] page dumped because: kasan: bad access detected [ 29.841191] [ 29.841360] Memory state around the buggy address: [ 29.841887] ffff888016af2c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.842608] ffff888016af2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.843315] >ffff888016af2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.844005] ^ [ 29.844350] ffff888016af2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.845024] ffff888016af2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.845706] ================================================================== [ 29.846436] Disabling lock debugging due to kernel taint [ 31.647782] BUG: Bad rss-counter state mm:0000000053ba51df type:MM_FILEPAGES val:33 [ 31.648404] BUG: Bad rss-counter state mm:0000000053ba51df type:MM_ANONPAGES val:22 [ 32.178552] BUG: Bad rss-counter state mm:00000000456cf40f type:MM_FILEPAGES val:33 [ 32.180060] BUG: Bad rss-counter state mm:00000000456cf40f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25219' (ECDSA) to the list of known hosts. 2023/06/20 04:50:05 fuzzer started 2023/06/20 04:50:05 dialing manager at localhost:44161 2023/06/20 04:50:05 checking machine... 2023/06/20 04:50:05 checking revisions... [ 32.806497] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:50:05 testing simple program... [ 32.855778] cgroup: Unknown subsys name 'net' [ 32.896255] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:50:04 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=1ffff11001fa4fac RCX=0000000080000000 RDX=ffff888016f89b40 RSI=ffffffff81717d74 RDI=0000000000000007 RBP=ffff88801a5850e8 RSP=ffff88800fd27d38 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000556d3d700654 R13=0000000000000000 R14=0000000000001255 R15=0000000000000000 RIP=ffffffff814c07f1 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3cd81e4900 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=0000556d3d700654 CR3=000000000f1a2000 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=00000000000000000000556d3c43f060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000002f RBX=00007ffee5e0fc50 RCX=0000000000000010 RDX=000000000000001c RSI=00007ffee5e0fbb0 RDI=00007ffee5e0fbc0 RBP=00007ffee5e0fbb0 RSP=00007ffee5e0fb90 R8 =0000565488de1640 R9 =00007ffee5ecd080 R10=0000000000000000 R11=00007ffee5e0fd80 R12=000000000000001b R13=00007ffee5e0fbb0 R14=0000565488dabc50 R15=00007ffee5e0fc50 RIP=00007f8d5aaf7ff6 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8d59ff8900 00000000 00000000 GS =0000 0000000000000000 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=00007f8d59450a90 CR3=000000000d596000 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=ffffffffff0000000000000000000000 XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=28ad144b023f620c00000000000ae988 XMM05=5601d266852768d30000000000134918 XMM06=59d5b690e0af863b00000000001337b0 XMM07=fb795ef6d65770560000000000123c30 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000