syzkaller login: [ 45.555723] BUG: Bad rss-counter state mm:00000000db84e658 type:MM_FILEPAGES val:33 [ 45.557321] BUG: Bad rss-counter state mm:00000000db84e658 type:MM_ANONPAGES val:22 [ 45.697876] ================================================================== [ 45.698879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.699901] Read of size 8 at addr ffff888014615c20 by task sshd/221 [ 45.700836] [ 45.701068] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.702003] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.703193] Call Trace: [ 45.703618] [ 45.703972] dump_stack_lvl+0x91/0xf0 [ 45.704624] print_report+0xcc/0x620 [ 45.705217] ? __virt_addr_valid+0x102/0x340 [ 45.705912] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.706690] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.707465] kasan_report+0xbe/0xf0 [ 45.708063] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.708880] vma_interval_tree_remove+0xc75/0xec0 [ 45.709652] vma_prepare+0xc54/0x11a0 [ 45.710247] __split_vma+0x5af/0x950 [ 45.710863] ? __pfx___split_vma+0x10/0x10 [ 45.711540] ? find_held_lock+0x2c/0x110 [ 45.712221] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.712876] ? lock_is_held_type+0x9f/0x120 [ 45.713470] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.714118] ? mtree_range_walk+0x632/0x900 [ 45.714719] ? mas_walk+0x5c7/0x7c0 [ 45.715220] do_vmi_munmap+0x1f1/0x2b0 [ 45.715757] mmap_region+0x1f9/0x2660 [ 45.716276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.716860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.717628] ? __pfx_lock_acquire+0x10/0x10 [ 45.718195] ? __pfx_mmap_region+0x10/0x10 [ 45.718770] ? security_mmap_addr+0x7d/0xa0 [ 45.719330] ? get_unmapped_area+0x1f5/0x3f0 [ 45.719929] do_mmap+0x854/0xf00 [ 45.720411] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.720960] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.721571] ksys_mmap_pgoff+0x3af/0x500 [ 45.722107] do_syscall_64+0x3f/0x90 [ 45.722631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.723312] RIP: 0033:0x7fa83f98ed82 [ 45.723812] 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 [ 45.726101] RSP: 002b:00007ffd28daae98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.727150] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa83f98ed82 [ 45.728097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa83edc8000 [ 45.729089] RBP: 00007fa83edc8000 R08: 0000000000000009 R09: 0000000000001000 [ 45.730031] R10: 0000000000000812 R11: 0000000000000206 R12: 000055719a8a5ec0 [ 45.730988] R13: 00007ffd28daaeb0 R14: 00007ffd28daaee0 R15: 00007ffd28dab240 [ 45.731917] [ 45.732267] [ 45.732509] Allocated by task 214: [ 45.732975] kasan_save_stack+0x22/0x50 [ 45.733548] kasan_set_track+0x25/0x30 [ 45.734083] __kasan_slab_alloc+0x59/0x70 [ 45.734674] kmem_cache_alloc+0x16b/0x370 [ 45.735230] vm_area_dup+0x20/0x160 [ 45.735744] __split_vma+0x170/0x950 [ 45.736280] split_vma+0xc6/0x110 [ 45.736786] mprotect_fixup+0x8d2/0xb30 [ 45.737346] do_mprotect_pkey+0x87e/0xd40 [ 45.737940] __x64_sys_mprotect+0x78/0xc0 [ 45.738544] do_syscall_64+0x3f/0x90 [ 45.739061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.739755] [ 45.739988] Freed by task 214: [ 45.740434] kasan_save_stack+0x22/0x50 [ 45.740964] kasan_set_track+0x25/0x30 [ 45.741478] kasan_save_free_info+0x2b/0x50 [ 45.742020] __kasan_slab_free+0x10a/0x190 [ 45.742620] kmem_cache_free+0x10d/0x4d0 [ 45.743171] rcu_core+0x8c8/0x2860 [ 45.743658] __do_softirq+0x1b7/0x7d4 [ 45.744178] [ 45.744409] Last potentially related work creation: [ 45.745060] kasan_save_stack+0x22/0x50 [ 45.745618] __kasan_record_aux_stack+0x8e/0xa0 [ 45.746285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.747000] remove_vma+0x139/0x170 [ 45.747496] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.748112] do_vmi_munmap+0x1f1/0x2b0 [ 45.748657] __vm_munmap+0x138/0x3a0 [ 45.749155] __x64_sys_munmap+0x59/0x80 [ 45.749705] do_syscall_64+0x3f/0x90 [ 45.750210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.750917] [ 45.751149] The buggy address belongs to the object at ffff888014615bc8 [ 45.751149] which belongs to the cache vm_area_struct of size 168 [ 45.752806] The buggy address is located 88 bytes inside of [ 45.752806] freed 168-byte region [ffff888014615bc8, ffff888014615c70) [ 45.754321] [ 45.754580] The buggy address belongs to the physical page: [ 45.755305] page:00000000e307485c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14615 [ 45.756524] memcg:ffff88800d6a5701 [ 45.756999] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.757725] page_type: 0xffffffff() [ 45.758217] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.759225] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6a5701 [ 45.760227] page dumped because: kasan: bad access detected [ 45.760957] [ 45.761194] Memory state around the buggy address: [ 45.761916] ffff888014615b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.763116] ffff888014615b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 45.764332] >ffff888014615c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 45.765535] ^ [ 45.766280] ffff888014615c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 45.767480] ffff888014615d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 45.768635] ================================================================== [ 45.770077] Disabling lock debugging due to kernel taint [ 48.645690] BUG: Bad rss-counter state mm:0000000026939c48 type:MM_FILEPAGES val:33 [ 48.647068] BUG: Bad rss-counter state mm:0000000026939c48 type:MM_ANONPAGES val:22 [ 49.221411] BUG: Bad rss-counter state mm:00000000ab83e5fb type:MM_FILEPAGES val:33 [ 49.222687] BUG: Bad rss-counter state mm:00000000ab83e5fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15696' (ECDSA) to the list of known hosts. 2023/06/19 12:29:12 fuzzer started 2023/06/19 12:29:13 dialing manager at localhost:44161 2023/06/19 12:29:13 checking machine... 2023/06/19 12:29:13 checking revisions... [ 49.862981] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:29:13 testing simple program... [ 49.910613] cgroup: Unknown subsys name 'net' [ 49.960209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:28:57 Registers: info registers vcpu 0 RAX=000055661147ee8e RBX=0000000000000508 RCX=0000000000000010 RDX=0000000000000478 RSI=000000000000000a RDI=000055661147ee80 RBP=0000556611469750 RSP=00007ffd66266e10 R8 =0000000000000008 R9 =00007f637425bbe0 R10=0000000000000008 R11=0000000000000246 R12=0000556611469b50 R13=0000000000000000 R14=000055661147ee70 R15=0000556611470f70 RIP=00007f637411c0d4 RFL=00000206 [-----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 00007f6373ca9900 00000000 00000000 GS =0000 0000000000000000 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=00007f63742610b0 CR3=000000000ed88000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00ff0000000000000000000000000000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002bd5ec4 RSI=ffffffff81acc192 RDI=ffff888015eaf4b8 RBP=ffff888015eaf550 RSP=ffff888015eaf4b8 R8 =0000000000000001 R9 =ffff888015eaf4f8 R10=0000000000038001 R11=000000000002f78a R12=ffff888015eaf580 R13=0000000000000000 R14=ffff88800eff8000 R15=0000000000000000 RIP=ffffffff810bd052 RFL=00000202 [-------] 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 00007f0e5b174700 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=00007f3b9ee6b0e0 CR3=0000000018f9a000 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=2032313a39323a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a39323a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000