syzkaller login: [ 30.899170] BUG: Bad rss-counter state mm:00000000c494e22b type:MM_FILEPAGES val:33 [ 30.900591] BUG: Bad rss-counter state mm:00000000c494e22b type:MM_ANONPAGES val:22 [ 31.048603] ================================================================== [ 31.049512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.050444] Read of size 8 at addr ffff88801592c310 by task sshd/219 [ 31.051220] [ 31.051439] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.052376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.053349] Call Trace: [ 31.053667] [ 31.053974] dump_stack_lvl+0x91/0xf0 [ 31.054483] print_report+0xcc/0x620 [ 31.054978] ? __virt_addr_valid+0x102/0x340 [ 31.055533] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.056151] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.056771] kasan_report+0xbe/0xf0 [ 31.057243] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057862] vma_interval_tree_remove+0xc75/0xec0 [ 31.058486] vma_prepare+0xc54/0x11a0 [ 31.058991] __split_vma+0x5af/0x950 [ 31.059483] ? __pfx___split_vma+0x10/0x10 [ 31.060013] ? find_held_lock+0x2c/0x110 [ 31.060546] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.061122] ? lock_is_held_type+0x9f/0x120 [ 31.061671] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.062357] ? mtree_range_walk+0x632/0x900 [ 31.062939] ? mas_walk+0x5c7/0x7c0 [ 31.063422] do_vmi_munmap+0x1f1/0x2b0 [ 31.063914] mmap_region+0x1f9/0x2660 [ 31.064395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.064920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.065653] ? __pfx_lock_acquire+0x10/0x10 [ 31.066206] ? __pfx_mmap_region+0x10/0x10 [ 31.066732] ? security_mmap_addr+0x7d/0xa0 [ 31.067279] ? get_unmapped_area+0x1f5/0x3f0 [ 31.067838] do_mmap+0x854/0xf00 [ 31.068283] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.068781] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.069362] ksys_mmap_pgoff+0x3af/0x500 [ 31.069886] do_syscall_64+0x3f/0x90 [ 31.070392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.071041] RIP: 0033:0x7f9ba616cd82 [ 31.071497] 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 [ 31.073616] RSP: 002b:00007ffdacfb12f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.074528] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ba616cd82 [ 31.075365] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ba55a6000 [ 31.076207] RBP: 00007f9ba55a6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.077048] R10: 0000000000000812 R11: 0000000000000206 R12: 00005611bb909d90 [ 31.077889] R13: 00007ffdacfb1310 R14: 00007ffdacfb1340 R15: 00007ffdacfb16a0 [ 31.078747] [ 31.079042] [ 31.079254] Allocated by task 212: [ 31.079675] kasan_save_stack+0x22/0x50 [ 31.080176] kasan_set_track+0x25/0x30 [ 31.080663] __kasan_slab_alloc+0x59/0x70 [ 31.081183] kmem_cache_alloc+0x16b/0x370 [ 31.081703] vm_area_dup+0x20/0x160 [ 31.082161] __split_vma+0x170/0x950 [ 31.082654] split_vma+0xc6/0x110 [ 31.083103] mprotect_fixup+0x8d2/0xb30 [ 31.083617] do_mprotect_pkey+0x87e/0xd40 [ 31.084117] __x64_sys_mprotect+0x78/0xc0 [ 31.084617] do_syscall_64+0x3f/0x90 [ 31.085068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.085690] [ 31.085897] Freed by task 212: [ 31.086276] kasan_save_stack+0x22/0x50 [ 31.086756] kasan_set_track+0x25/0x30 [ 31.087228] kasan_save_free_info+0x2b/0x50 [ 31.087735] __kasan_slab_free+0x10a/0x190 [ 31.088237] kmem_cache_free+0x10d/0x4d0 [ 31.088726] rcu_core+0x8c8/0x2860 [ 31.089152] __do_softirq+0x1b7/0x7d4 [ 31.089602] [ 31.089808] Last potentially related work creation: [ 31.090371] kasan_save_stack+0x22/0x50 [ 31.090846] __kasan_record_aux_stack+0x8e/0xa0 [ 31.091390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.091998] remove_vma+0x139/0x170 [ 31.092427] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.092954] do_vmi_munmap+0x1f1/0x2b0 [ 31.093430] __vm_munmap+0x138/0x3a0 [ 31.093897] __x64_sys_munmap+0x59/0x80 [ 31.094415] do_syscall_64+0x3f/0x90 [ 31.094887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.095533] [ 31.095747] The buggy address belongs to the object at ffff88801592c2b8 [ 31.095747] which belongs to the cache vm_area_struct of size 168 [ 31.097206] The buggy address is located 88 bytes inside of [ 31.097206] freed 168-byte region [ffff88801592c2b8, ffff88801592c360) [ 31.098629] [ 31.098843] The buggy address belongs to the physical page: [ 31.099503] page:000000001cc4e0ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1592c [ 31.100581] memcg:ffff88801a73dd01 [ 31.101001] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.101682] page_type: 0xffffffff() [ 31.102147] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.103118] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a73dd01 [ 31.104038] page dumped because: kasan: bad access detected [ 31.104689] [ 31.104907] Memory state around the buggy address: [ 31.105513] ffff88801592c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.106435] ffff88801592c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.107324] >ffff88801592c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.108192] ^ [ 31.108651] ffff88801592c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.109493] ffff88801592c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.110343] ================================================================== [ 31.111390] Disabling lock debugging due to kernel taint [ 32.605215] BUG: Bad rss-counter state mm:000000004819f5a2 type:MM_FILEPAGES val:33 [ 32.606016] BUG: Bad rss-counter state mm:000000004819f5a2 type:MM_ANONPAGES val:22 [ 33.025295] BUG: Bad rss-counter state mm:00000000fe1ba3d0 type:MM_FILEPAGES val:33 [ 33.026043] BUG: Bad rss-counter state mm:00000000fe1ba3d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2429' (ECDSA) to the list of known hosts. 2023/06/20 11:39:48 fuzzer started 2023/06/20 11:39:48 dialing manager at localhost:36067 2023/06/20 11:39:48 checking machine... 2023/06/20 11:39:48 checking revisions... [ 33.670067] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:39:48 testing simple program... [ 33.716370] cgroup: Unknown subsys name 'net' [ 33.753920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:39:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff813ad470 RCX=ffffffff864b6d84 RDX=1ffff1100d9c134f RSI=0000000000000001 RDI=ffffffff86051f5c RBP=ffff88806ce09ad0 RSP=ffff88806ce09a48 R8 =ffffffff864b6d6c R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b5d66 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09ab9 R15=ffff88806ce09a78 RIP=ffffffff81130930 RFL=00000292 [--S-A--] 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 00007f1db9dfa900 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=00007f1dba3b1618 CR3=000000000ea74000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=000055d588b31000 CR3=0000000010314000 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=2038343a39333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a39333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000