syzkaller login: [ 34.571867] BUG: Bad rss-counter state mm:00000000e5719cd1 type:MM_FILEPAGES val:33 [ 34.573360] BUG: Bad rss-counter state mm:00000000e5719cd1 type:MM_ANONPAGES val:22 [ 34.732692] ================================================================== [ 34.733795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.734784] Read of size 8 at addr ffff88801671ded8 by task sshd/219 [ 34.735681] [ 34.735910] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.736811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.737824] Call Trace: [ 34.738146] [ 34.738435] dump_stack_lvl+0x91/0xf0 [ 34.738936] print_report+0xcc/0x620 [ 34.739436] ? __virt_addr_valid+0x102/0x340 [ 34.739999] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.740622] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.741247] kasan_report+0xbe/0xf0 [ 34.741749] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.742383] vma_interval_tree_remove+0xc75/0xec0 [ 34.742996] vma_prepare+0xc54/0x11a0 [ 34.743476] __split_vma+0x5af/0x950 [ 34.743956] ? __pfx___split_vma+0x10/0x10 [ 34.744492] ? find_held_lock+0x2c/0x110 [ 34.745028] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.745599] ? lock_is_held_type+0x9f/0x120 [ 34.746187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.746810] ? mtree_range_walk+0x632/0x900 [ 34.747373] ? mas_walk+0x5c7/0x7c0 [ 34.747852] do_vmi_munmap+0x1f1/0x2b0 [ 34.748349] mmap_region+0x1f9/0x2660 [ 34.748842] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.749370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.750099] ? __pfx_lock_acquire+0x10/0x10 [ 34.750633] ? __pfx_mmap_region+0x10/0x10 [ 34.751163] ? security_mmap_addr+0x7d/0xa0 [ 34.751690] ? get_unmapped_area+0x1f5/0x3f0 [ 34.752239] do_mmap+0x854/0xf00 [ 34.752680] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.753179] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.753762] ksys_mmap_pgoff+0x3af/0x500 [ 34.754271] do_syscall_64+0x3f/0x90 [ 34.754752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.755399] RIP: 0033:0x7feeacb7fd82 [ 34.755856] 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 [ 34.758010] RSP: 002b:00007ffc45532428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.758928] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feeacb7fd82 [ 34.759771] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feeabfb9000 [ 34.760610] RBP: 00007feeabfb9000 R08: 0000000000000009 R09: 0000000000001000 [ 34.761460] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584d4c8bd90 [ 34.762324] R13: 00007ffc45532440 R14: 00007ffc45532470 R15: 00007ffc455327d0 [ 34.763190] [ 34.763485] [ 34.763703] Allocated by task 212: [ 34.764129] kasan_save_stack+0x22/0x50 [ 34.764636] kasan_set_track+0x25/0x30 [ 34.765129] __kasan_slab_alloc+0x59/0x70 [ 34.765671] kmem_cache_alloc+0x16b/0x370 [ 34.766190] vm_area_dup+0x20/0x160 [ 34.766648] __split_vma+0x170/0x950 [ 34.767126] split_vma+0xc6/0x110 [ 34.767566] mprotect_fixup+0x8d2/0xb30 [ 34.768068] do_mprotect_pkey+0x87e/0xd40 [ 34.768598] __x64_sys_mprotect+0x78/0xc0 [ 34.769125] do_syscall_64+0x3f/0x90 [ 34.769621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.770272] [ 34.770490] Freed by task 212: [ 34.770883] kasan_save_stack+0x22/0x50 [ 34.771387] kasan_set_track+0x25/0x30 [ 34.771885] kasan_save_free_info+0x2b/0x50 [ 34.772425] __kasan_slab_free+0x10a/0x190 [ 34.772966] kmem_cache_free+0x10d/0x4d0 [ 34.773475] rcu_core+0x8c8/0x2860 [ 34.773930] __do_softirq+0x1b7/0x7d4 [ 34.774406] [ 34.774624] Last potentially related work creation: [ 34.775209] kasan_save_stack+0x22/0x50 [ 34.775720] __kasan_record_aux_stack+0x8e/0xa0 [ 34.776299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.776946] remove_vma+0x139/0x170 [ 34.777403] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.777989] do_vmi_munmap+0x1f1/0x2b0 [ 34.778478] __vm_munmap+0x138/0x3a0 [ 34.778952] __x64_sys_munmap+0x59/0x80 [ 34.779452] do_syscall_64+0x3f/0x90 [ 34.779929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.780581] [ 34.780799] The buggy address belongs to the object at ffff88801671de80 [ 34.780799] which belongs to the cache vm_area_struct of size 168 [ 34.782274] The buggy address is located 88 bytes inside of [ 34.782274] freed 168-byte region [ffff88801671de80, ffff88801671df28) [ 34.783672] [ 34.783891] The buggy address belongs to the physical page: [ 34.784551] page:000000008d0f90af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1671d [ 34.785660] memcg:ffff88800f26bd01 [ 34.786096] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.786735] page_type: 0xffffffff() [ 34.787190] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.788104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f26bd01 [ 34.789027] page dumped because: kasan: bad access detected [ 34.789718] [ 34.789941] Memory state around the buggy address: [ 34.790537] ffff88801671dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.791417] ffff88801671de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.792294] >ffff88801671de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.793167] ^ [ 34.794002] ffff88801671df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.795085] ffff88801671df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.796156] ================================================================== [ 34.797402] Disabling lock debugging due to kernel taint [ 36.730988] BUG: Bad rss-counter state mm:000000004a584051 type:MM_FILEPAGES val:33 [ 36.732025] BUG: Bad rss-counter state mm:000000004a584051 type:MM_ANONPAGES val:22 [ 37.217782] BUG: Bad rss-counter state mm:000000001d7fb3cc type:MM_FILEPAGES val:33 [ 37.219058] BUG: Bad rss-counter state mm:000000001d7fb3cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64459' (ECDSA) to the list of known hosts. 2023/06/19 16:29:17 fuzzer started 2023/06/19 16:29:17 dialing manager at localhost:44161 2023/06/19 16:29:17 checking machine... 2023/06/19 16:29:17 checking revisions... [ 37.923860] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:29:17 testing simple program... [ 37.977383] cgroup: Unknown subsys name 'net' [ 38.034131] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:29:13 Registers: info registers vcpu 0 RAX=1ffffffff0c26ea7 RBX=0000000000000002 RCX=ffffffff8613753e RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09de8 R15=ffff88806ce09a98 RIP=ffffffff81130b73 RFL=00000213 [----A-C] 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 00007f6e6e31d900 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=00007f6e6d785df0 CR3=00000000094c8000 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=a598de11ad8394873440df2c175035c0 XMM02=000000000011dc88eff9b2d0a8fce9cb XMM03=000000000011dd582c67c8bc2e329bc3 XMM04=2e377ad5f16372c500000000000ae988 XMM05=944895b2303efc0c0000000000135740 XMM06=dfcdbad4f1609c3700000000001345d8 XMM07=fb795ef6d65770560000000000124ad8 XMM08=2c67c8bc2e329bc3000000000011dcf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8137815c RSP=ffff88806cf09e40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=ffff88806cf35000 R13=ffff88806cf09ee8 R14=0000000000000074 R15=ffff88806cf3a360 RIP=ffffffff8135b929 RFL=00000002 [-------] 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 00007f645fd53900 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=00007f646030a618 CR3=000000000d6dc000 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=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