syzkaller login: [ 28.848227] BUG: Bad rss-counter state mm:0000000065f26a5c type:MM_FILEPAGES val:33 [ 28.849671] BUG: Bad rss-counter state mm:0000000065f26a5c type:MM_ANONPAGES val:22 [ 29.015698] ================================================================== [ 29.016220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.016736] Read of size 8 at addr ffff888014793880 by task sshd/222 [ 29.017157] [ 29.017278] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.017751] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.018290] Call Trace: [ 29.018466] [ 29.018623] dump_stack_lvl+0x91/0xf0 [ 29.018912] print_report+0xcc/0x620 [ 29.019185] ? __virt_addr_valid+0x102/0x340 [ 29.019484] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.019815] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.020156] kasan_report+0xbe/0xf0 [ 29.020416] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.020757] vma_interval_tree_remove+0xc75/0xec0 [ 29.021229] vma_prepare+0xc54/0x11a0 [ 29.021498] __split_vma+0x5af/0x950 [ 29.021755] ? __pfx___split_vma+0x10/0x10 [ 29.022041] ? find_held_lock+0x2c/0x110 [ 29.022329] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.022636] ? lock_is_held_type+0x9f/0x120 [ 29.022941] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.023275] ? mtree_range_walk+0x632/0x900 [ 29.023576] ? mas_walk+0x5c7/0x7c0 [ 29.023834] do_vmi_munmap+0x1f1/0x2b0 [ 29.024103] mmap_region+0x1f9/0x2660 [ 29.024368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.024648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.025038] ? __pfx_lock_acquire+0x10/0x10 [ 29.025348] ? __pfx_mmap_region+0x10/0x10 [ 29.025652] ? security_mmap_addr+0x7d/0xa0 [ 29.025954] ? get_unmapped_area+0x1f5/0x3f0 [ 29.026269] do_mmap+0x854/0xf00 [ 29.026525] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.026809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.027134] ksys_mmap_pgoff+0x3af/0x500 [ 29.027421] do_syscall_64+0x3f/0x90 [ 29.027687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.028051] RIP: 0033:0x7fca10aead82 [ 29.028307] 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 [ 29.029500] RSP: 002b:00007ffedfc69ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.029999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca10aead82 [ 29.030475] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca0ff24000 [ 29.030977] RBP: 00007fca0ff24000 R08: 0000000000000009 R09: 0000000000001000 [ 29.031463] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d5b4acb20 [ 29.031951] R13: 00007ffedfc69ef0 R14: 00007ffedfc69f20 R15: 00007ffedfc6a280 [ 29.032432] [ 29.032596] [ 29.032717] Allocated by task 214: [ 29.032967] kasan_save_stack+0x22/0x50 [ 29.033266] kasan_set_track+0x25/0x30 [ 29.033553] __kasan_slab_alloc+0x59/0x70 [ 29.033852] kmem_cache_alloc+0x16b/0x370 [ 29.034153] vm_area_dup+0x20/0x160 [ 29.034423] __split_vma+0x170/0x950 [ 29.034692] split_vma+0xc6/0x110 [ 29.034947] mprotect_fixup+0x8d2/0xb30 [ 29.035238] do_mprotect_pkey+0x87e/0xd40 [ 29.035547] __x64_sys_mprotect+0x78/0xc0 [ 29.035849] do_syscall_64+0x3f/0x90 [ 29.036120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.036499] [ 29.036623] Freed by task 19: [ 29.036841] kasan_save_stack+0x22/0x50 [ 29.037136] kasan_set_track+0x25/0x30 [ 29.037423] kasan_save_free_info+0x2b/0x50 [ 29.037729] __kasan_slab_free+0x10a/0x190 [ 29.038036] kmem_cache_free+0x10d/0x4d0 [ 29.038338] rcu_core+0x8c8/0x2860 [ 29.038601] __do_softirq+0x1b7/0x7d4 [ 29.038896] [ 29.039018] Last potentially related work creation: [ 29.039354] kasan_save_stack+0x22/0x50 [ 29.039642] __kasan_record_aux_stack+0x8e/0xa0 [ 29.039972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.040344] remove_vma+0x139/0x170 [ 29.040607] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.040928] do_vmi_munmap+0x1f1/0x2b0 [ 29.041207] __vm_munmap+0x138/0x3a0 [ 29.041481] __x64_sys_munmap+0x59/0x80 [ 29.041768] do_syscall_64+0x3f/0x90 [ 29.042040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.042411] [ 29.042535] The buggy address belongs to the object at ffff888014793828 [ 29.042535] which belongs to the cache vm_area_struct of size 168 [ 29.043424] The buggy address is located 88 bytes inside of [ 29.043424] freed 168-byte region [ffff888014793828, ffff8880147938d0) [ 29.044234] [ 29.044358] The buggy address belongs to the physical page: [ 29.044741] page:00000000c1cd75c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14793 [ 29.045374] memcg:ffff888018c01001 [ 29.045617] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.045993] page_type: 0xffffffff() [ 29.046254] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.046784] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c01001 [ 29.047306] page dumped because: kasan: bad access detected [ 29.047684] [ 29.047810] Memory state around the buggy address: [ 29.048150] ffff888014793780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.048643] ffff888014793800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.049141] >ffff888014793880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.049637] ^ [ 29.049872] ffff888014793900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.050361] ffff888014793980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.050861] ================================================================== [ 29.051474] Disabling lock debugging due to kernel taint [ 30.960559] BUG: Bad rss-counter state mm:000000009904ee41 type:MM_FILEPAGES val:33 [ 30.961394] BUG: Bad rss-counter state mm:000000009904ee41 type:MM_ANONPAGES val:22 [ 31.413194] BUG: Bad rss-counter state mm:00000000f2d11826 type:MM_FILEPAGES val:33 [ 31.414129] BUG: Bad rss-counter state mm:00000000f2d11826 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26172' (ECDSA) to the list of known hosts. 2023/06/20 17:52:35 fuzzer started 2023/06/20 17:52:35 dialing manager at localhost:36067 2023/06/20 17:52:35 checking machine... 2023/06/20 17:52:35 checking revisions... [ 32.141721] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:52:35 testing simple program... [ 32.182546] cgroup: Unknown subsys name 'net' [ 32.249811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:52:35 Registers: info registers vcpu 0 RAX=ffffffff864bcd54 RBX=0000000000000001 RCX=ffffffff84601285 RDX=0000000000000000 RSI=ffffffff864bccfa RDI=ffffffff86055f10 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff864bccfa R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b6d53 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130881 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff4b6b33900 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=00007ff4b5fad600 CR3=000000000c5bc000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8a815570d1d4353500000000000ae988 XMM05=d1263b08cba0543d0000000000132ac0 XMM06=59d5b690e0af863b0000000000131c08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=000000000000000c RDX=ffff88800ddab680 RSI=0000000000000000 RDI=0000000000000001 RBP=fffffffffffffffe RSP=ffff88800fc6fb48 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffea0000608640 R14=ffff88800fc6fe00 R15=dffffc0000000000 RIP=ffffffff8162f53f 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 00007f769e8c4900 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=00007f769ee7c0b0 CR3=000000000e7c8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000