syzkaller login: [ 39.349858] BUG: Bad rss-counter state mm:000000009a320249 type:MM_FILEPAGES val:33 [ 39.351575] BUG: Bad rss-counter state mm:000000009a320249 type:MM_ANONPAGES val:22 [ 39.494596] ================================================================== [ 39.495580] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.496574] Read of size 8 at addr ffff88800fce1a50 by task sshd/219 [ 39.497381] [ 39.497726] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.498663] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.499720] Call Trace: [ 39.500075] [ 39.500382] dump_stack_lvl+0x91/0xf0 [ 39.500910] print_report+0xcc/0x620 [ 39.501422] ? __virt_addr_valid+0x102/0x340 [ 39.502001] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.502670] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.503347] kasan_report+0xbe/0xf0 [ 39.503860] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.504533] vma_interval_tree_remove+0xc75/0xec0 [ 39.505181] vma_prepare+0xc54/0x11a0 [ 39.505701] __split_vma+0x5af/0x950 [ 39.506218] ? __pfx___split_vma+0x10/0x10 [ 39.506786] ? find_held_lock+0x2c/0x110 [ 39.507375] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.507985] ? lock_is_held_type+0x9f/0x120 [ 39.508565] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.509223] ? mtree_range_walk+0x632/0x900 [ 39.509812] ? mas_walk+0x5c7/0x7c0 [ 39.510320] do_vmi_munmap+0x1f1/0x2b0 [ 39.510853] mmap_region+0x1f9/0x2660 [ 39.511372] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.511923] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.512682] ? __pfx_lock_acquire+0x10/0x10 [ 39.513255] ? __pfx_mmap_region+0x10/0x10 [ 39.513827] ? security_mmap_addr+0x7d/0xa0 [ 39.514400] ? get_unmapped_area+0x1f5/0x3f0 [ 39.514989] do_mmap+0x854/0xf00 [ 39.515482] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.516009] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.516613] ksys_mmap_pgoff+0x3af/0x500 [ 39.517167] do_syscall_64+0x3f/0x90 [ 39.517681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.518373] RIP: 0033:0x7f401e094d82 [ 39.518865] 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 [ 39.521149] RSP: 002b:00007ffed1c07598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.522119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f401e094d82 [ 39.523028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f401d4ce000 [ 39.523942] RBP: 00007f401d4ce000 R08: 0000000000000009 R09: 0000000000001000 [ 39.524853] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556ba6feec0 [ 39.525766] R13: 00007ffed1c075b0 R14: 00007ffed1c075e0 R15: 00007ffed1c07940 [ 39.526687] [ 39.527002] [ 39.527253] Allocated by task 212: [ 39.527724] kasan_save_stack+0x22/0x50 [ 39.528273] kasan_set_track+0x25/0x30 [ 39.528803] __kasan_slab_alloc+0x59/0x70 [ 39.529365] kmem_cache_alloc+0x16b/0x370 [ 39.529922] vm_area_dup+0x20/0x160 [ 39.530411] __split_vma+0x170/0x950 [ 39.530909] split_vma+0xc6/0x110 [ 39.531383] mprotect_fixup+0x8d2/0xb30 [ 39.531924] do_mprotect_pkey+0x87e/0xd40 [ 39.532483] __x64_sys_mprotect+0x78/0xc0 [ 39.533040] do_syscall_64+0x3f/0x90 [ 39.533549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.534254] [ 39.534483] Freed by task 212: [ 39.534903] kasan_save_stack+0x22/0x50 [ 39.535451] kasan_set_track+0x25/0x30 [ 39.535975] kasan_save_free_info+0x2b/0x50 [ 39.536536] __kasan_slab_free+0x10a/0x190 [ 39.537104] kmem_cache_free+0x10d/0x4d0 [ 39.537662] rcu_core+0x8c8/0x2860 [ 39.538134] __do_softirq+0x1b7/0x7d4 [ 39.538644] [ 39.538872] Last potentially related work creation: [ 39.539627] kasan_save_stack+0x22/0x50 [ 39.540168] __kasan_record_aux_stack+0x8e/0xa0 [ 39.540784] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.541473] remove_vma+0x139/0x170 [ 39.541954] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.542551] do_vmi_munmap+0x1f1/0x2b0 [ 39.543073] __vm_munmap+0x138/0x3a0 [ 39.543582] __x64_sys_munmap+0x59/0x80 [ 39.544114] do_syscall_64+0x3f/0x90 [ 39.544628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.545322] [ 39.545554] The buggy address belongs to the object at ffff88800fce19f8 [ 39.545554] which belongs to the cache vm_area_struct of size 168 [ 39.547131] The buggy address is located 88 bytes inside of [ 39.547131] freed 168-byte region [ffff88800fce19f8, ffff88800fce1aa0) [ 39.548644] [ 39.548884] The buggy address belongs to the physical page: [ 39.549602] page:00000000c70f507b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfce1 [ 39.550764] memcg:ffff88800e8cae01 [ 39.551217] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.551981] page_type: 0xffffffff() [ 39.552467] raw: 0100000000000200 ffff88800879fc80 ffffea00003bb9c0 0000000000000009 [ 39.553453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8cae01 [ 39.554443] page dumped because: kasan: bad access detected [ 39.555153] [ 39.555398] Memory state around the buggy address: [ 39.556024] ffff88800fce1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.556945] ffff88800fce1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.557876] >ffff88800fce1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.558950] ^ [ 39.559711] ffff88800fce1a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 39.560629] ffff88800fce1b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.561538] ================================================================== [ 39.562547] Disabling lock debugging due to kernel taint [ 41.592786] BUG: Bad rss-counter state mm:0000000069d4bc10 type:MM_FILEPAGES val:33 [ 41.593738] BUG: Bad rss-counter state mm:0000000069d4bc10 type:MM_ANONPAGES val:22 [ 42.109539] BUG: Bad rss-counter state mm:00000000a65b57fb type:MM_FILEPAGES val:33 [ 42.110685] BUG: Bad rss-counter state mm:00000000a65b57fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48161' (ECDSA) to the list of known hosts. 2023/06/20 03:21:21 fuzzer started 2023/06/20 03:21:21 dialing manager at localhost:44161 2023/06/20 03:21:21 checking machine... 2023/06/20 03:21:21 checking revisions... [ 42.716850] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:21:21 testing simple program... [ 42.767203] cgroup: Unknown subsys name 'net' [ 42.818501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:21:10 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=00000000000001d0 RCX=0000000000000001 RDX=0000000000000dc0 RSI=ffff88800d946f80 RDI=ffff8880087b6780 RBP=ffff8880087b6780 RSP=ffff88801034fa38 R8 =ffff88801034fa90 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800d946f80 R13=0000000000000000 R14=ffff88801034fa90 R15=0000000000000dc0 RIP=ffffffff81803b83 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 00007f33a77d0900 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=00007f40b2c4b650 CR3=00000000101ba000 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=a4ee40870e94693200000000000ae988 XMM05=119427b8eda1c4c80000000000136a60 XMM06=4fda316b135da52b0000000000135850 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffdcb4e49e8 CR3=0000000014792000 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=2030323a31323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a31323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000