syzkaller login: [ 31.012150] BUG: Bad rss-counter state mm:00000000727147df type:MM_FILEPAGES val:33 [ 31.013376] BUG: Bad rss-counter state mm:00000000727147df type:MM_ANONPAGES val:22 [ 31.051838] ================================================================== [ 31.053172] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.054478] Read of size 8 at addr ffff88800fd2aed8 by task sshd/220 [ 31.055507] [ 31.055850] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.057107] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.058202] Call Trace: [ 31.058562] [ 31.058940] dump_stack_lvl+0x91/0xf0 [ 31.059506] print_report+0xcc/0x620 [ 31.060091] ? __virt_addr_valid+0x102/0x340 [ 31.060730] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.061449] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.062180] kasan_report+0xbe/0xf0 [ 31.062721] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.063352] vma_interval_tree_remove+0xc75/0xec0 [ 31.064103] vma_prepare+0xc54/0x11a0 [ 31.064619] __split_vma+0x5af/0x950 [ 31.065106] ? __pfx___split_vma+0x10/0x10 [ 31.065633] ? find_held_lock+0x2c/0x110 [ 31.066167] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.066731] ? lock_is_held_type+0x9f/0x120 [ 31.067290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.067921] ? mtree_range_walk+0x632/0x900 [ 31.068500] ? mas_walk+0x5c7/0x7c0 [ 31.068988] do_vmi_munmap+0x1f1/0x2b0 [ 31.069484] mmap_region+0x1f9/0x2660 [ 31.069991] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.070506] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.071234] ? __pfx_lock_acquire+0x10/0x10 [ 31.071771] ? __pfx_mmap_region+0x10/0x10 [ 31.072330] ? security_mmap_addr+0x7d/0xa0 [ 31.072913] ? get_unmapped_area+0x1f5/0x3f0 [ 31.073496] do_mmap+0x854/0xf00 [ 31.073968] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.074476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.075060] ksys_mmap_pgoff+0x3af/0x500 [ 31.075571] do_syscall_64+0x3f/0x90 [ 31.076084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076754] RIP: 0033:0x7fda2a914d82 [ 31.077231] 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 [ 31.079381] RSP: 002b:00007ffd72b31dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.080317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda2a914d82 [ 31.081203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda29d4e000 [ 31.082059] RBP: 00007fda29d4e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.082911] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3d9b51ec0 [ 31.083749] R13: 00007ffd72b31df0 R14: 00007ffd72b31e20 R15: 00007ffd72b32180 [ 31.084648] [ 31.084956] [ 31.085170] Allocated by task 213: [ 31.085593] kasan_save_stack+0x22/0x50 [ 31.086109] kasan_set_track+0x25/0x30 [ 31.086595] __kasan_slab_alloc+0x59/0x70 [ 31.087130] kmem_cache_alloc+0x16b/0x370 [ 31.087639] vm_area_dup+0x20/0x160 [ 31.088113] __split_vma+0x170/0x950 [ 31.088586] split_vma+0xc6/0x110 [ 31.089060] mprotect_fixup+0x8d2/0xb30 [ 31.089566] do_mprotect_pkey+0x87e/0xd40 [ 31.090097] __x64_sys_mprotect+0x78/0xc0 [ 31.090610] do_syscall_64+0x3f/0x90 [ 31.091111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091760] [ 31.091994] Freed by task 213: [ 31.092382] kasan_save_stack+0x22/0x50 [ 31.092942] kasan_set_track+0x25/0x30 [ 31.093441] kasan_save_free_info+0x2b/0x50 [ 31.093987] __kasan_slab_free+0x10a/0x190 [ 31.094525] kmem_cache_free+0x10d/0x4d0 [ 31.095046] rcu_core+0x8c8/0x2860 [ 31.095526] __do_softirq+0x1b7/0x7d4 [ 31.096011] [ 31.096225] Last potentially related work creation: [ 31.096822] kasan_save_stack+0x22/0x50 [ 31.097343] __kasan_record_aux_stack+0x8e/0xa0 [ 31.097942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.098608] remove_vma+0x139/0x170 [ 31.099200] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.099940] do_vmi_munmap+0x1f1/0x2b0 [ 31.100536] __vm_munmap+0x138/0x3a0 [ 31.101020] __x64_sys_munmap+0x59/0x80 [ 31.101523] do_syscall_64+0x3f/0x90 [ 31.102028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.102672] [ 31.102899] The buggy address belongs to the object at ffff88800fd2ae80 [ 31.102899] which belongs to the cache vm_area_struct of size 168 [ 31.104367] The buggy address is located 88 bytes inside of [ 31.104367] freed 168-byte region [ffff88800fd2ae80, ffff88800fd2af28) [ 31.105796] [ 31.106040] The buggy address belongs to the physical page: [ 31.106700] page:0000000003568d8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd2a [ 31.107796] memcg:ffff88801602ac01 [ 31.108240] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.108909] page_type: 0xffffffff() [ 31.109358] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.110294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801602ac01 [ 31.111226] page dumped because: kasan: bad access detected [ 31.111894] [ 31.112113] Memory state around the buggy address: [ 31.112709] ffff88800fd2ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.113593] ffff88800fd2ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.114486] >ffff88800fd2ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.115369] ^ [ 31.116139] ffff88800fd2af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.117045] ffff88800fd2af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.117923] ================================================================== [ 31.118975] Disabling lock debugging due to kernel taint [ 32.932783] BUG: Bad rss-counter state mm:000000003b7076bd type:MM_FILEPAGES val:33 [ 32.933560] BUG: Bad rss-counter state mm:000000003b7076bd type:MM_ANONPAGES val:22 [ 33.391328] BUG: Bad rss-counter state mm:00000000a75e79de type:MM_FILEPAGES val:33 [ 33.392617] BUG: Bad rss-counter state mm:00000000a75e79de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4341' (ECDSA) to the list of known hosts. 2023/06/21 00:52:51 fuzzer started 2023/06/21 00:52:51 dialing manager at localhost:36067 2023/06/21 00:52:51 checking machine... 2023/06/21 00:52:51 checking revisions... [ 34.101043] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:52:51 testing simple program... [ 34.141710] cgroup: Unknown subsys name 'net' [ 34.194036] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:52:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b38 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff83871c52 RDI=ffff88806ce09b44 RBP=0000000000000016 RSP=ffff88806ce09a50 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000091be9 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888019620000 R15=ffff888017293000 RIP=ffffffff813ad4ee RFL=00000213 [----A-C] 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 00007f6161c81900 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=00007f6162238618 CR3=000000001462c000 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=00007fc0b5df28c0 CR3=000000000c56a000 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=8943a25ea2422192564c177986a4b3ba XMM02=000000000011ac10eff9b2d0a8fce9cb XMM03=000000000011ace02c67c8bc2e329bc3 XMM04=a3a1b8e7b034f7c200000000000ae988 XMM05=19e9129bd510f2350000000000131800 XMM06=d1470e80fec093a60000000000130668 XMM07=e042d86d42eb936e0000000000121ca8 XMM08=0c0a743984ca1055000000000011ace0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000