syzkaller login: [ 33.876571] BUG: Bad rss-counter state mm:000000005d65885c type:MM_FILEPAGES val:33 [ 33.877581] BUG: Bad rss-counter state mm:000000005d65885c type:MM_ANONPAGES val:22 [ 34.034844] ================================================================== [ 34.035778] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.036748] Read of size 8 at addr ffff888019774b38 by task sshd/220 [ 34.037533] [ 34.037868] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.038817] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.039801] Call Trace: [ 34.040120] [ 34.040406] dump_stack_lvl+0x91/0xf0 [ 34.040974] print_report+0xcc/0x620 [ 34.041467] ? __virt_addr_valid+0x102/0x340 [ 34.042026] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.042647] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.043285] kasan_report+0xbe/0xf0 [ 34.043777] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.044402] vma_interval_tree_remove+0xc75/0xec0 [ 34.045031] vma_prepare+0xc54/0x11a0 [ 34.045514] __split_vma+0x5af/0x950 [ 34.045991] ? __pfx___split_vma+0x10/0x10 [ 34.046531] ? find_held_lock+0x2c/0x110 [ 34.047066] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.047642] ? lock_is_held_type+0x9f/0x120 [ 34.048184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.048813] ? mtree_range_walk+0x632/0x900 [ 34.049369] ? mas_walk+0x5c7/0x7c0 [ 34.049848] do_vmi_munmap+0x1f1/0x2b0 [ 34.050344] mmap_region+0x1f9/0x2660 [ 34.050830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.051356] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.052071] ? __pfx_lock_acquire+0x10/0x10 [ 34.052627] ? __pfx_mmap_region+0x10/0x10 [ 34.053157] ? security_mmap_addr+0x7d/0xa0 [ 34.053696] ? get_unmapped_area+0x1f5/0x3f0 [ 34.054255] do_mmap+0x854/0xf00 [ 34.054704] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.055205] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.055771] ksys_mmap_pgoff+0x3af/0x500 [ 34.056287] do_syscall_64+0x3f/0x90 [ 34.056777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.057434] RIP: 0033:0x7f0f1f18ed82 [ 34.057899] 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 [ 34.060049] RSP: 002b:00007ffedc1d0188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.060983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f1f18ed82 [ 34.061844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f1e5c8000 [ 34.062700] RBP: 00007f0f1e5c8000 R08: 0000000000000009 R09: 0000000000001000 [ 34.063563] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a5c35bf70 [ 34.064430] R13: 00007ffedc1d01a0 R14: 00007ffedc1d01d0 R15: 00007ffedc1d0530 [ 34.065301] [ 34.065600] [ 34.065823] Allocated by task 213: [ 34.066262] kasan_save_stack+0x22/0x50 [ 34.066776] kasan_set_track+0x25/0x30 [ 34.067278] __kasan_slab_alloc+0x59/0x70 [ 34.067806] kmem_cache_alloc+0x16b/0x370 [ 34.068337] vm_area_dup+0x20/0x160 [ 34.068797] __split_vma+0x170/0x950 [ 34.069276] split_vma+0xc6/0x110 [ 34.069724] mprotect_fixup+0x8d2/0xb30 [ 34.070236] do_mprotect_pkey+0x87e/0xd40 [ 34.070772] __x64_sys_mprotect+0x78/0xc0 [ 34.071311] do_syscall_64+0x3f/0x90 [ 34.071794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.072450] [ 34.072677] Freed by task 209: [ 34.073070] kasan_save_stack+0x22/0x50 [ 34.073579] kasan_set_track+0x25/0x30 [ 34.074074] kasan_save_free_info+0x2b/0x50 [ 34.074621] __kasan_slab_free+0x10a/0x190 [ 34.075164] kmem_cache_free+0x10d/0x4d0 [ 34.075681] rcu_core+0x8c8/0x2860 [ 34.076132] __do_softirq+0x1b7/0x7d4 [ 34.076635] [ 34.076854] Last potentially related work creation: [ 34.077439] kasan_save_stack+0x22/0x50 [ 34.077947] __kasan_record_aux_stack+0x8e/0xa0 [ 34.078532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.079185] remove_vma+0x139/0x170 [ 34.079716] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.080319] do_vmi_munmap+0x1f1/0x2b0 [ 34.080821] __vm_munmap+0x138/0x3a0 [ 34.081284] __x64_sys_munmap+0x59/0x80 [ 34.081794] do_syscall_64+0x3f/0x90 [ 34.082258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.082899] [ 34.083122] The buggy address belongs to the object at ffff888019774ae0 [ 34.083122] which belongs to the cache vm_area_struct of size 168 [ 34.084611] The buggy address is located 88 bytes inside of [ 34.084611] freed 168-byte region [ffff888019774ae0, ffff888019774b88) [ 34.086046] [ 34.086266] The buggy address belongs to the physical page: [ 34.086946] page:0000000049f60838 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19774 [ 34.088060] memcg:ffff8880094b4e01 [ 34.088486] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.089142] page_type: 0xffffffff() [ 34.089610] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.090527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094b4e01 [ 34.091444] page dumped because: kasan: bad access detected [ 34.092113] [ 34.092331] Memory state around the buggy address: [ 34.092922] ffff888019774a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.093783] ffff888019774a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 34.094631] >ffff888019774b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.095476] ^ [ 34.096084] ffff888019774b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.096952] ffff888019774c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.097799] ================================================================== [ 34.098721] Disabling lock debugging due to kernel taint [ 36.722102] BUG: Bad rss-counter state mm:0000000036fa671f type:MM_FILEPAGES val:33 [ 36.723113] BUG: Bad rss-counter state mm:0000000036fa671f type:MM_ANONPAGES val:22 [ 37.165848] BUG: Bad rss-counter state mm:00000000a02ea6c3 type:MM_FILEPAGES val:33 [ 37.167026] BUG: Bad rss-counter state mm:00000000a02ea6c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6803' (ECDSA) to the list of known hosts. 2023/06/20 06:03:07 fuzzer started 2023/06/20 06:03:07 dialing manager at localhost:44161 2023/06/20 06:03:07 checking machine... 2023/06/20 06:03:07 checking revisions... [ 37.881192] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:03:08 testing simple program... [ 37.934553] cgroup: Unknown subsys name 'net' [ 37.985658] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:03:04 Registers: info registers vcpu 0 RAX=ffff88800fd1fa28 RBX=00000000fffffffc RCX=ffffffff818c24a7 RDX=ffff88800e311b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800fd1f958 R8 =0000000000000005 R9 =0000000000000000 R10=00000000fffffffc R11=0000000000000000 R12=0000000000000001 R13=ffff88800ece4280 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff818c2006 RFL=00000286 [--S--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 00007fbddea75700 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=00007f6bc6212aa8 CR3=000000000d65a000 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=1cd3b4d12383bd85a9467359e9bad71f XMM02=00000000001200b0ec2efd57dc4c00df XMM03=0000000000124778c4869e1ee5de2707 XMM04=075c58924c6153ff00000000000ae988 XMM05=19e9129bd510f2350000000000134378 XMM06=4fda316b135da52b0000000000134200 XMM07=e042d86d42eb936e00000000001249f8 XMM08=c4869e1ee5de27070000000000120110 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff1100d9e139f RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88806cf09ce0 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf361a0 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000056 [---ZAP-] 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 00007efd75c18900 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=00007efd75bdd008 CR3=000000000e890000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000