syzkaller login: [ 32.851564] BUG: Bad rss-counter state mm:000000004cecbf99 type:MM_FILEPAGES val:33 [ 32.852384] BUG: Bad rss-counter state mm:000000004cecbf99 type:MM_ANONPAGES val:22 [ 33.021264] ================================================================== [ 33.022201] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.023158] Read of size 8 at addr ffff888019982d08 by task sshd/221 [ 33.023954] [ 33.024303] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.025214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.026227] Call Trace: [ 33.026570] [ 33.026870] dump_stack_lvl+0x91/0xf0 [ 33.027364] print_report+0xcc/0x620 [ 33.027866] ? __virt_addr_valid+0x102/0x340 [ 33.028428] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.029072] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.029690] kasan_report+0xbe/0xf0 [ 33.030179] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.030825] vma_interval_tree_remove+0xc75/0xec0 [ 33.031438] vma_prepare+0xc54/0x11a0 [ 33.031936] __split_vma+0x5af/0x950 [ 33.032429] ? __pfx___split_vma+0x10/0x10 [ 33.032966] ? find_held_lock+0x2c/0x110 [ 33.033498] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.034079] ? lock_is_held_type+0x9f/0x120 [ 33.034626] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.035279] ? mtree_range_walk+0x632/0x900 [ 33.035833] ? mas_walk+0x5c7/0x7c0 [ 33.036313] do_vmi_munmap+0x1f1/0x2b0 [ 33.036806] mmap_region+0x1f9/0x2660 [ 33.037293] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.037807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.038533] ? __pfx_lock_acquire+0x10/0x10 [ 33.039090] ? __pfx_mmap_region+0x10/0x10 [ 33.039627] ? security_mmap_addr+0x7d/0xa0 [ 33.040166] ? get_unmapped_area+0x1f5/0x3f0 [ 33.040728] do_mmap+0x854/0xf00 [ 33.041179] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.041678] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.042250] ksys_mmap_pgoff+0x3af/0x500 [ 33.042774] do_syscall_64+0x3f/0x90 [ 33.043260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.043912] RIP: 0033:0x7fb800d97d82 [ 33.044373] 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 [ 33.046501] RSP: 002b:00007ffe5881b618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.047440] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb800d97d82 [ 33.048289] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8001d1000 [ 33.049161] RBP: 00007fb8001d1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.050013] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579fec31ec0 [ 33.050881] R13: 00007ffe5881b630 R14: 00007ffe5881b660 R15: 00007ffe5881b9c0 [ 33.051750] [ 33.052044] [ 33.052262] Allocated by task 214: [ 33.052695] kasan_save_stack+0x22/0x50 [ 33.053207] kasan_set_track+0x25/0x30 [ 33.053702] __kasan_slab_alloc+0x59/0x70 [ 33.054238] kmem_cache_alloc+0x16b/0x370 [ 33.054772] vm_area_dup+0x20/0x160 [ 33.055237] __split_vma+0x170/0x950 [ 33.055703] split_vma+0xc6/0x110 [ 33.056147] mprotect_fixup+0x8d2/0xb30 [ 33.056648] do_mprotect_pkey+0x87e/0xd40 [ 33.057167] __x64_sys_mprotect+0x78/0xc0 [ 33.057690] do_syscall_64+0x3f/0x90 [ 33.058165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.058811] [ 33.059026] Freed by task 214: [ 33.059417] kasan_save_stack+0x22/0x50 [ 33.059918] kasan_set_track+0x25/0x30 [ 33.060413] kasan_save_free_info+0x2b/0x50 [ 33.060947] __kasan_slab_free+0x10a/0x190 [ 33.061479] kmem_cache_free+0x10d/0x4d0 [ 33.061992] rcu_core+0x8c8/0x2860 [ 33.062434] __do_softirq+0x1b7/0x7d4 [ 33.062919] [ 33.063136] Last potentially related work creation: [ 33.063719] kasan_save_stack+0x22/0x50 [ 33.064224] __kasan_record_aux_stack+0x8e/0xa0 [ 33.064796] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.065519] remove_vma+0x139/0x170 [ 33.065979] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.066536] do_vmi_munmap+0x1f1/0x2b0 [ 33.067029] __vm_munmap+0x138/0x3a0 [ 33.067492] __x64_sys_munmap+0x59/0x80 [ 33.067989] do_syscall_64+0x3f/0x90 [ 33.068460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.069102] [ 33.069321] The buggy address belongs to the object at ffff888019982cb0 [ 33.069321] which belongs to the cache vm_area_struct of size 168 [ 33.070793] The buggy address is located 88 bytes inside of [ 33.070793] freed 168-byte region [ffff888019982cb0, ffff888019982d58) [ 33.072196] [ 33.072415] The buggy address belongs to the physical page: [ 33.073075] page:000000008d1b56e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19982 [ 33.074169] memcg:ffff88800ef37b01 [ 33.074595] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.075268] page_type: 0xffffffff() [ 33.075722] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.076653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef37b01 [ 33.077570] page dumped because: kasan: bad access detected [ 33.078235] [ 33.078454] Memory state around the buggy address: [ 33.079039] ffff888019982c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 33.079897] ffff888019982c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.080751] >ffff888019982d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.081597] ^ [ 33.082045] ffff888019982d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.082913] ffff888019982e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.083755] ================================================================== [ 33.084732] Disabling lock debugging due to kernel taint [ 36.043911] BUG: Bad rss-counter state mm:00000000d25164c5 type:MM_FILEPAGES val:33 [ 36.045056] BUG: Bad rss-counter state mm:00000000d25164c5 type:MM_ANONPAGES val:22 [ 36.514114] BUG: Bad rss-counter state mm:0000000068ea6769 type:MM_FILEPAGES val:33 [ 36.515169] BUG: Bad rss-counter state mm:0000000068ea6769 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52657' (ECDSA) to the list of known hosts. 2023/06/19 18:58:45 fuzzer started 2023/06/19 18:58:45 dialing manager at localhost:44161 2023/06/19 18:58:45 checking machine... 2023/06/19 18:58:45 checking revisions... [ 37.274772] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:58:45 testing simple program... [ 37.328292] cgroup: Unknown subsys name 'net' [ 37.373128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:58:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002dd7e80 RSI=ffff888016ebf7e0 RDI=ffff888016ebf408 RBP=ffff888016c563c0 RSP=ffff888016ebf348 R8 =0000000000000001 R9 =ffff888016ebf3f8 R10=0000000000038001 R11=000000000008b7e4 R12=ffff888016ebf418 R13=ffff888016ebf400 R14=ffff888016ebf7e0 R15=ffff888016ebf3b8 RIP=ffffffff81131c60 RFL=00000246 [---Z-P-] 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 00007f773b522900 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=00007ffc517d7000 CR3=000000000eec8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007f6922ff3320 CR3=000000000c9a0000 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=d0a64ac2a4627bafc145e77d54699e9c XMM02=000000000011f870eff9b2d0a8fce9cb XMM03=000000000011f9402c67c8bc2e329bc3 XMM04=7ff332059ec731c800000000000ae988 XMM05=62e88220d1ee614b00000000001349b0 XMM06=c291bd5c70af25b90000000000133a50 XMM07=e042d86d42eb936e0000000000124030 XMM08=a5dd9f6b6f9ee8f7000000000011f940 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000