syzkaller login: [ 60.265617] BUG: Bad rss-counter state mm:0000000082488a1d type:MM_FILEPAGES val:33 [ 60.266629] BUG: Bad rss-counter state mm:0000000082488a1d type:MM_ANONPAGES val:22 [ 60.428989] ================================================================== [ 60.430074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.431181] Read of size 8 at addr ffff88800c826310 by task sshd/220 [ 60.432264] [ 60.432519] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.433531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.434601] Call Trace: [ 60.434919] [ 60.435208] dump_stack_lvl+0x91/0xf0 [ 60.435694] print_report+0xcc/0x620 [ 60.436188] ? __virt_addr_valid+0x102/0x340 [ 60.436741] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.437359] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.437997] kasan_report+0xbe/0xf0 [ 60.438471] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.439091] vma_interval_tree_remove+0xc75/0xec0 [ 60.439688] vma_prepare+0xc54/0x11a0 [ 60.440166] __split_vma+0x5af/0x950 [ 60.440635] ? __pfx___split_vma+0x10/0x10 [ 60.441163] ? find_held_lock+0x2c/0x110 [ 60.441682] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.442252] ? lock_is_held_type+0x9f/0x120 [ 60.442788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.443392] ? mtree_range_walk+0x632/0x900 [ 60.443942] ? mas_walk+0x5c7/0x7c0 [ 60.444416] do_vmi_munmap+0x1f1/0x2b0 [ 60.444903] mmap_region+0x1f9/0x2660 [ 60.445383] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.445913] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.446623] ? __pfx_lock_acquire+0x10/0x10 [ 60.447152] ? __pfx_mmap_region+0x10/0x10 [ 60.447677] ? security_mmap_addr+0x7d/0xa0 [ 60.448212] ? get_unmapped_area+0x1f5/0x3f0 [ 60.448757] do_mmap+0x854/0xf00 [ 60.449196] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.449685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.450255] ksys_mmap_pgoff+0x3af/0x500 [ 60.450759] do_syscall_64+0x3f/0x90 [ 60.451233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.451877] RIP: 0033:0x7ff7f2ce1d82 [ 60.452331] 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 [ 60.454442] RSP: 002b:00007ffec25115d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.455339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7f2ce1d82 [ 60.456171] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7f211b000 [ 60.457011] RBP: 00007ff7f211b000 R08: 0000000000000009 R09: 0000000000001000 [ 60.457853] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdc42c8ec0 [ 60.458690] R13: 00007ffec25115f0 R14: 00007ffec2511620 R15: 00007ffec2511980 [ 60.459536] [ 60.459828] [ 60.460044] Allocated by task 213: [ 60.460468] kasan_save_stack+0x22/0x50 [ 60.460969] kasan_set_track+0x25/0x30 [ 60.461457] __kasan_slab_alloc+0x59/0x70 [ 60.461996] kmem_cache_alloc+0x16b/0x370 [ 60.462511] vm_area_dup+0x20/0x160 [ 60.462970] __split_vma+0x170/0x950 [ 60.463432] split_vma+0xc6/0x110 [ 60.463870] mprotect_fixup+0x8d2/0xb30 [ 60.464374] do_mprotect_pkey+0x87e/0xd40 [ 60.464891] __x64_sys_mprotect+0x78/0xc0 [ 60.465410] do_syscall_64+0x3f/0x90 [ 60.465888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.466529] [ 60.466743] Freed by task 203: [ 60.467137] kasan_save_stack+0x22/0x50 [ 60.467636] kasan_set_track+0x25/0x30 [ 60.468127] kasan_save_free_info+0x2b/0x50 [ 60.468655] __kasan_slab_free+0x10a/0x190 [ 60.469188] kmem_cache_free+0x10d/0x4d0 [ 60.469692] rcu_core+0x8c8/0x2860 [ 60.470152] __do_softirq+0x1b7/0x7d4 [ 60.470629] [ 60.470843] Last potentially related work creation: [ 60.471427] kasan_save_stack+0x22/0x50 [ 60.471930] __kasan_record_aux_stack+0x8e/0xa0 [ 60.472500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.473212] remove_vma+0x139/0x170 [ 60.473664] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.474248] do_vmi_munmap+0x1f1/0x2b0 [ 60.474734] __vm_munmap+0x138/0x3a0 [ 60.475199] __x64_sys_munmap+0x59/0x80 [ 60.475694] do_syscall_64+0x3f/0x90 [ 60.476168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.476807] [ 60.477023] Second to last potentially related work creation: [ 60.477697] kasan_save_stack+0x22/0x50 [ 60.478217] __kasan_record_aux_stack+0x8e/0xa0 [ 60.478787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.479429] remove_vma+0x139/0x170 [ 60.479884] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.480438] do_vmi_munmap+0x1f1/0x2b0 [ 60.480921] __vm_munmap+0x138/0x3a0 [ 60.481384] elf_map+0x26f/0x310 [ 60.481837] load_elf_binary+0xd82/0x5030 [ 60.482366] bprm_execve+0x803/0x1940 [ 60.482837] do_execveat_common+0x734/0x8e0 [ 60.483362] __x64_sys_execve+0x93/0xc0 [ 60.483851] do_syscall_64+0x3f/0x90 [ 60.484323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.484967] [ 60.485189] The buggy address belongs to the object at ffff88800c8262b8 [ 60.485189] which belongs to the cache vm_area_struct of size 168 [ 60.486657] The buggy address is located 88 bytes inside of [ 60.486657] freed 168-byte region [ffff88800c8262b8, ffff88800c826360) [ 60.488049] [ 60.488262] The buggy address belongs to the physical page: [ 60.488918] page:00000000e23d12cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc826 [ 60.490009] memcg:ffff888013eed901 [ 60.490436] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.491078] page_type: 0xffffffff() [ 60.491528] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 60.492441] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013eed901 [ 60.493341] page dumped because: kasan: bad access detected [ 60.494006] [ 60.494223] Memory state around the buggy address: [ 60.494798] ffff88800c826200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 60.495646] ffff88800c826280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 60.496494] >ffff88800c826300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 60.497334] ^ [ 60.497807] ffff88800c826380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 60.498660] ffff88800c826400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 60.499504] ================================================================== [ 60.500428] Disabling lock debugging due to kernel taint [ 63.163718] BUG: Bad rss-counter state mm:00000000dc3bf24e type:MM_FILEPAGES val:33 [ 63.164864] BUG: Bad rss-counter state mm:00000000dc3bf24e type:MM_ANONPAGES val:22 [ 63.627531] BUG: Bad rss-counter state mm:00000000d8846438 type:MM_FILEPAGES val:33 [ 63.628730] BUG: Bad rss-counter state mm:00000000d8846438 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10898' (ECDSA) to the list of known hosts. 2023/06/20 17:11:52 fuzzer started 2023/06/20 17:11:52 dialing manager at localhost:36067 2023/06/20 17:11:52 checking machine... 2023/06/20 17:11:52 checking revisions... [ 64.339252] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:11:52 testing simple program... [ 64.391959] cgroup: Unknown subsys name 'net' [ 64.495105] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:11:52 Registers: info registers vcpu 0 RAX=00000000ed58ff38 RBX=000000006d6baa9a RCX=ffff8880147bfacc RDX=000000000000000a RSI=0000000000000011 RDI=00000000889c7292 RBP=ffff8880087b83c0 RSP=ffff8880147bfa58 R8 =00000000ffffff9d R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000cc0 R14=ffff8880147bfac0 R15=000000000000000a RIP=ffffffff82270463 RFL=00000a83 [-OS---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 00007fbb99726900 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=00007fbb98b1ed80 CR3=000000000ee8c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0d44f0c7a2ed245800000000000ae988 XMM05=1118633ecd87a28500000000001345c8 XMM06=19e9129bd510f2350000000000133460 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff888008e379f0 RDX=1ffff110011c6f35 RSI=ffffffff813ad720 RDI=ffff888008e37a18 RBP=ffff888008e379e8 RSP=ffff888008e37948 R8 =0000000000000001 R9 =ffff888008e37990 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e37a18 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88800d7d6b80 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 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=00007ffc4b82b000 CR3=000000000ed3c000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000