syzkaller login: [ 39.365040] BUG: Bad rss-counter state mm:000000000a475d3d type:MM_FILEPAGES val:33 [ 39.366096] BUG: Bad rss-counter state mm:000000000a475d3d type:MM_ANONPAGES val:22 [ 39.533804] ================================================================== [ 39.534708] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.535640] Read of size 8 at addr ffff88800ee5a310 by task sshd/221 [ 39.536712] [ 39.537007] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.537922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.538944] Call Trace: [ 39.539289] [ 39.539580] dump_stack_lvl+0x91/0xf0 [ 39.540070] print_report+0xcc/0x620 [ 39.540603] ? __virt_addr_valid+0x102/0x340 [ 39.541160] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.541795] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.542430] kasan_report+0xbe/0xf0 [ 39.542918] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.543565] vma_interval_tree_remove+0xc75/0xec0 [ 39.544169] vma_prepare+0xc54/0x11a0 [ 39.544686] __split_vma+0x5af/0x950 [ 39.545168] ? __pfx___split_vma+0x10/0x10 [ 39.545716] ? find_held_lock+0x2c/0x110 [ 39.546241] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.546816] ? lock_is_held_type+0x9f/0x120 [ 39.547373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.547976] ? mtree_range_walk+0x632/0x900 [ 39.548573] ? mas_walk+0x5c7/0x7c0 [ 39.549050] do_vmi_munmap+0x1f1/0x2b0 [ 39.549560] mmap_region+0x1f9/0x2660 [ 39.550045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.550572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.551298] ? __pfx_lock_acquire+0x10/0x10 [ 39.551832] ? __pfx_mmap_region+0x10/0x10 [ 39.552402] ? security_mmap_addr+0x7d/0xa0 [ 39.552942] ? get_unmapped_area+0x1f5/0x3f0 [ 39.553506] do_mmap+0x854/0xf00 [ 39.553947] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.554459] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.555027] ksys_mmap_pgoff+0x3af/0x500 [ 39.555560] do_syscall_64+0x3f/0x90 [ 39.556034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.556735] RIP: 0033:0x7f6e01ad1d82 [ 39.557195] 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 [ 39.559398] RSP: 002b:00007fff2c5892a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.560334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e01ad1d82 [ 39.561186] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e00f0b000 [ 39.562046] RBP: 00007f6e00f0b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.562914] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfd8d03ec0 [ 39.563782] R13: 00007fff2c5892c0 R14: 00007fff2c5892f0 R15: 00007fff2c589650 [ 39.564695] [ 39.564996] [ 39.565216] Allocated by task 213: [ 39.565665] kasan_save_stack+0x22/0x50 [ 39.566183] kasan_set_track+0x25/0x30 [ 39.566699] __kasan_slab_alloc+0x59/0x70 [ 39.567229] kmem_cache_alloc+0x16b/0x370 [ 39.567777] vm_area_dup+0x20/0x160 [ 39.568235] __split_vma+0x170/0x950 [ 39.568757] split_vma+0xc6/0x110 [ 39.569202] mprotect_fixup+0x8d2/0xb30 [ 39.569731] do_mprotect_pkey+0x87e/0xd40 [ 39.570258] __x64_sys_mprotect+0x78/0xc0 [ 39.570803] do_syscall_64+0x3f/0x90 [ 39.571297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.571956] [ 39.572177] Freed by task 19: [ 39.572597] kasan_save_stack+0x22/0x50 [ 39.573111] kasan_set_track+0x25/0x30 [ 39.573634] kasan_save_free_info+0x2b/0x50 [ 39.574169] __kasan_slab_free+0x10a/0x190 [ 39.574730] kmem_cache_free+0x10d/0x4d0 [ 39.575252] rcu_core+0x8c8/0x2860 [ 39.575714] __do_softirq+0x1b7/0x7d4 [ 39.576203] [ 39.576470] Last potentially related work creation: [ 39.577059] kasan_save_stack+0x22/0x50 [ 39.577685] __kasan_record_aux_stack+0x8e/0xa0 [ 39.578334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.578981] remove_vma+0x139/0x170 [ 39.579459] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.580027] do_vmi_munmap+0x1f1/0x2b0 [ 39.580556] __vm_munmap+0x138/0x3a0 [ 39.581027] __x64_sys_munmap+0x59/0x80 [ 39.581556] do_syscall_64+0x3f/0x90 [ 39.582031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.582692] [ 39.582912] The buggy address belongs to the object at ffff88800ee5a2b8 [ 39.582912] which belongs to the cache vm_area_struct of size 168 [ 39.584463] The buggy address is located 88 bytes inside of [ 39.584463] freed 168-byte region [ffff88800ee5a2b8, ffff88800ee5a360) [ 39.585909] [ 39.586123] The buggy address belongs to the physical page: [ 39.586797] page:0000000042515fc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee5a [ 39.587912] memcg:ffff88800d972f01 [ 39.588383] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.589037] page_type: 0xffffffff() [ 39.589513] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.590462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d972f01 [ 39.591395] page dumped because: kasan: bad access detected [ 39.592049] [ 39.592273] Memory state around the buggy address: [ 39.592886] ffff88800ee5a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.593758] ffff88800ee5a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.594628] >ffff88800ee5a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.595492] ^ [ 39.595966] ffff88800ee5a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.596865] ffff88800ee5a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.597738] ================================================================== [ 39.598692] Disabling lock debugging due to kernel taint [ 41.534664] BUG: Bad rss-counter state mm:000000005770f4dd type:MM_FILEPAGES val:33 [ 41.535988] BUG: Bad rss-counter state mm:000000005770f4dd type:MM_ANONPAGES val:22 [ 41.942557] BUG: Bad rss-counter state mm:0000000088d539a0 type:MM_FILEPAGES val:33 [ 41.943596] BUG: Bad rss-counter state mm:0000000088d539a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25953' (ECDSA) to the list of known hosts. 2023/06/19 13:51:21 fuzzer started 2023/06/19 13:51:21 dialing manager at localhost:44161 2023/06/19 13:51:21 checking machine... 2023/06/19 13:51:21 checking revisions... [ 42.686346] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:51:21 testing simple program... [ 42.726494] cgroup: Unknown subsys name 'net' [ 42.769170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:51:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffe95dd0a88 CR3=00000000141a2000 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=2031323a31353a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a31353a3331203931 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f3ef345c020 CR3=000000000c78c000 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=5c2924c3e1219c9cb848a02c31514ec8 XMM02=2c67c8bc2e329bc3000000000011c420 XMM03=fb795ef6d657705600000000001238c0 XMM04=ff0d3ea31808e88f00000000000ae988 XMM05=315224e6d2aed09e0000000000134298 XMM06=c291bd5c70af25b90000000000133338 XMM07=e042d86d42eb936e0000000000123b40 XMM08=0ce4855af35d9cd3000000000011c480 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000