syzkaller login: [ 38.847862] BUG: Bad rss-counter state mm:00000000fa3b8e9a type:MM_FILEPAGES val:33 [ 38.849088] BUG: Bad rss-counter state mm:00000000fa3b8e9a type:MM_ANONPAGES val:22 [ 38.889620] ================================================================== [ 38.890928] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.892227] Read of size 8 at addr ffff88800e894798 by task sshd/220 [ 38.893158] [ 38.893491] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.894661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.895636] Call Trace: [ 38.895939] [ 38.896307] dump_stack_lvl+0x91/0xf0 [ 38.896803] print_report+0xcc/0x620 [ 38.897258] ? __virt_addr_valid+0x102/0x340 [ 38.897777] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898372] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898952] kasan_report+0xbe/0xf0 [ 38.899405] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900006] vma_interval_tree_remove+0xc75/0xec0 [ 38.900594] vma_prepare+0xc54/0x11a0 [ 38.901064] __split_vma+0x5af/0x950 [ 38.901528] ? __pfx___split_vma+0x10/0x10 [ 38.902053] ? find_held_lock+0x2c/0x110 [ 38.902568] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.903129] ? lock_is_held_type+0x9f/0x120 [ 38.903663] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.904269] ? mtree_range_walk+0x632/0x900 [ 38.904808] ? mas_walk+0x5c7/0x7c0 [ 38.905280] do_vmi_munmap+0x1f1/0x2b0 [ 38.905770] mmap_region+0x1f9/0x2660 [ 38.906286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.906786] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.907503] ? __pfx_lock_acquire+0x10/0x10 [ 38.908035] ? __pfx_mmap_region+0x10/0x10 [ 38.908563] ? security_mmap_addr+0x7d/0xa0 [ 38.909092] ? get_unmapped_area+0x1f5/0x3f0 [ 38.909627] do_mmap+0x854/0xf00 [ 38.910069] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.910554] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.911122] ksys_mmap_pgoff+0x3af/0x500 [ 38.911632] do_syscall_64+0x3f/0x90 [ 38.912104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912739] RIP: 0033:0x7f6676dadd82 [ 38.913183] 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 [ 38.915288] RSP: 002b:00007ffe2eb36068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.916183] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6676dadd82 [ 38.917023] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66761e7000 [ 38.917869] RBP: 00007f66761e7000 R08: 0000000000000009 R09: 0000000000001000 [ 38.918715] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556daded2b20 [ 38.919538] R13: 00007ffe2eb36080 R14: 00007ffe2eb360b0 R15: 00007ffe2eb36410 [ 38.920393] [ 38.920682] [ 38.920899] Allocated by task 213: [ 38.921320] kasan_save_stack+0x22/0x50 [ 38.921813] kasan_set_track+0x25/0x30 [ 38.922312] __kasan_slab_alloc+0x59/0x70 [ 38.922827] kmem_cache_alloc+0x16b/0x370 [ 38.923340] vm_area_dup+0x20/0x160 [ 38.923794] __split_vma+0x170/0x950 [ 38.924262] split_vma+0xc6/0x110 [ 38.924688] mprotect_fixup+0x8d2/0xb30 [ 38.925188] do_mprotect_pkey+0x87e/0xd40 [ 38.925697] __x64_sys_mprotect+0x78/0xc0 [ 38.926229] do_syscall_64+0x3f/0x90 [ 38.926712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.927349] [ 38.927564] Freed by task 204: [ 38.927972] kasan_save_stack+0x22/0x50 [ 38.928500] kasan_set_track+0x25/0x30 [ 38.928991] kasan_save_free_info+0x2b/0x50 [ 38.929540] __kasan_slab_free+0x10a/0x190 [ 38.930089] kmem_cache_free+0x10d/0x4d0 [ 38.930591] rcu_core+0x8c8/0x2860 [ 38.931035] __do_softirq+0x1b7/0x7d4 [ 38.931512] [ 38.931722] Last potentially related work creation: [ 38.932300] kasan_save_stack+0x22/0x50 [ 38.932802] __kasan_record_aux_stack+0x8e/0xa0 [ 38.933477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.934148] remove_vma+0x139/0x170 [ 38.934593] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.935157] do_vmi_munmap+0x1f1/0x2b0 [ 38.935646] __vm_munmap+0x138/0x3a0 [ 38.936114] __x64_sys_munmap+0x59/0x80 [ 38.936611] do_syscall_64+0x3f/0x90 [ 38.937090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.937735] [ 38.937954] Second to last potentially related work creation: [ 38.938641] kasan_save_stack+0x22/0x50 [ 38.939145] __kasan_record_aux_stack+0x8e/0xa0 [ 38.939714] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.940353] remove_vma+0x139/0x170 [ 38.940798] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.941352] do_vmi_munmap+0x1f1/0x2b0 [ 38.941838] mmap_region+0x1f9/0x2660 [ 38.942316] do_mmap+0x854/0xf00 [ 38.942745] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.943236] ksys_mmap_pgoff+0x3af/0x500 [ 38.943729] do_syscall_64+0x3f/0x90 [ 38.944198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.944833] [ 38.945048] The buggy address belongs to the object at ffff88800e894740 [ 38.945048] which belongs to the cache vm_area_struct of size 168 [ 38.946531] The buggy address is located 88 bytes inside of [ 38.946531] freed 168-byte region [ffff88800e894740, ffff88800e8947e8) [ 38.947955] [ 38.948177] The buggy address belongs to the physical page: [ 38.948839] page:000000002bfb8893 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe894 [ 38.949933] memcg:ffff88800d4f8701 [ 38.950361] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.951009] page_type: 0xffffffff() [ 38.951460] raw: 0100000000000200 ffff8880087a0c80 ffffea0000608500 dead000000000008 [ 38.952378] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4f8701 [ 38.953285] page dumped because: kasan: bad access detected [ 38.953953] [ 38.954180] Memory state around the buggy address: [ 38.954760] ffff88800e894680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.955602] ffff88800e894700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.956448] >ffff88800e894780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.957281] ^ [ 38.957770] ffff88800e894800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.958627] ffff88800e894880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.959465] ================================================================== [ 38.960558] Disabling lock debugging due to kernel taint [ 41.435581] BUG: Bad rss-counter state mm:00000000fdd84fcc type:MM_FILEPAGES val:33 [ 41.437153] BUG: Bad rss-counter state mm:00000000fdd84fcc type:MM_ANONPAGES val:22 [ 42.022728] BUG: Bad rss-counter state mm:00000000c81b2188 type:MM_FILEPAGES val:33 [ 42.023705] BUG: Bad rss-counter state mm:00000000c81b2188 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7747' (ECDSA) to the list of known hosts. 2023/06/20 19:04:55 fuzzer started 2023/06/20 19:04:55 dialing manager at localhost:36067 2023/06/20 19:04:55 checking machine... 2023/06/20 19:04:55 checking revisions... [ 42.753561] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:04:55 testing simple program... [ 42.789300] cgroup: Unknown subsys name 'net' [ 42.843211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88807ffd7010 RCX=ffffffff811432de RDX=ffff8880158ed1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=00000000095e47a0 RSP=ffff888016637798 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=0000000000000000 RIP=ffffffff814c086b 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 00007ff32201a700 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=00007fb68529b0b0 CR3=00000000100e0000 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=2034353a34303a3931203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a34303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fe0d1a469e0 CR3=000000000d868000 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=f04c09c991ac5299be400d63761e8753 XMM02=2c67c8bc2e329bc3000000000011acd0 XMM03=fb795ef6d65770560000000000121670 XMM04=03f2a031a04821fe00000000000ae988 XMM05=19e9129bd510f2350000000000132558 XMM06=aee24158926e437b0000000000131730 XMM07=e042d86d42eb936e00000000001218f0 XMM08=770bf457c27a1a1b000000000011ad30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000