syzkaller login: [ 28.234211] BUG: Bad rss-counter state mm:00000000e5998810 type:MM_FILEPAGES val:33 [ 28.235188] BUG: Bad rss-counter state mm:00000000e5998810 type:MM_ANONPAGES val:22 [ 28.406543] ================================================================== [ 28.407609] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.408717] Read of size 8 at addr ffff88800e550ed8 by task sshd/220 [ 28.409824] [ 28.410080] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.410932] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.411896] Call Trace: [ 28.412213] [ 28.412495] dump_stack_lvl+0x91/0xf0 [ 28.412979] print_report+0xcc/0x620 [ 28.413463] ? __virt_addr_valid+0x102/0x340 [ 28.414013] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.414626] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.415239] kasan_report+0xbe/0xf0 [ 28.415713] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.416333] vma_interval_tree_remove+0xc75/0xec0 [ 28.416955] vma_prepare+0xc54/0x11a0 [ 28.417463] __split_vma+0x5af/0x950 [ 28.417957] ? __pfx___split_vma+0x10/0x10 [ 28.418513] ? find_held_lock+0x2c/0x110 [ 28.419051] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.419634] ? lock_is_held_type+0x9f/0x120 [ 28.420206] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.420834] ? mtree_range_walk+0x632/0x900 [ 28.421404] ? mas_walk+0x5c7/0x7c0 [ 28.421920] do_vmi_munmap+0x1f1/0x2b0 [ 28.422430] mmap_region+0x1f9/0x2660 [ 28.422944] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.423478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.424227] ? __pfx_lock_acquire+0x10/0x10 [ 28.424795] ? __pfx_mmap_region+0x10/0x10 [ 28.425350] ? security_mmap_addr+0x7d/0xa0 [ 28.425904] ? get_unmapped_area+0x1f5/0x3f0 [ 28.426481] do_mmap+0x854/0xf00 [ 28.426936] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.427461] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.428042] ksys_mmap_pgoff+0x3af/0x500 [ 28.428567] do_syscall_64+0x3f/0x90 [ 28.429065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.429740] RIP: 0033:0x7f0ea26dad82 [ 28.430224] 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 [ 28.432456] RSP: 002b:00007fffa00f7e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.433383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ea26dad82 [ 28.434264] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ea1b14000 [ 28.435117] RBP: 00007f0ea1b14000 R08: 0000000000000009 R09: 0000000000001000 [ 28.435985] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608170b0d90 [ 28.436852] R13: 00007fffa00f7e20 R14: 00007fffa00f7e50 R15: 00007fffa00f81b0 [ 28.437719] [ 28.438019] [ 28.438238] Allocated by task 213: [ 28.438675] kasan_save_stack+0x22/0x50 [ 28.439198] kasan_set_track+0x25/0x30 [ 28.439697] __kasan_slab_alloc+0x59/0x70 [ 28.440223] kmem_cache_alloc+0x16b/0x370 [ 28.440747] vm_area_dup+0x20/0x160 [ 28.441210] __split_vma+0x170/0x950 [ 28.441688] split_vma+0xc6/0x110 [ 28.442130] mprotect_fixup+0x8d2/0xb30 [ 28.442632] do_mprotect_pkey+0x87e/0xd40 [ 28.443150] __x64_sys_mprotect+0x78/0xc0 [ 28.443679] do_syscall_64+0x3f/0x90 [ 28.444155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.444795] [ 28.445013] Freed by task 19: [ 28.445400] kasan_save_stack+0x22/0x50 [ 28.445934] kasan_set_track+0x25/0x30 [ 28.446433] kasan_save_free_info+0x2b/0x50 [ 28.446961] __kasan_slab_free+0x10a/0x190 [ 28.447499] kmem_cache_free+0x10d/0x4d0 [ 28.448004] rcu_core+0x8c8/0x2860 [ 28.448455] __do_softirq+0x1b7/0x7d4 [ 28.448934] [ 28.449147] Last potentially related work creation: [ 28.449750] kasan_save_stack+0x22/0x50 [ 28.450328] __kasan_record_aux_stack+0x8e/0xa0 [ 28.450911] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.451560] remove_vma+0x139/0x170 [ 28.452017] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.452592] do_vmi_munmap+0x1f1/0x2b0 [ 28.453097] __vm_munmap+0x138/0x3a0 [ 28.453580] __x64_sys_munmap+0x59/0x80 [ 28.454082] do_syscall_64+0x3f/0x90 [ 28.454554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.455190] [ 28.455403] Second to last potentially related work creation: [ 28.456084] kasan_save_stack+0x22/0x50 [ 28.456582] __kasan_record_aux_stack+0x8e/0xa0 [ 28.457155] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.457797] remove_vma+0x139/0x170 [ 28.458253] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.458831] do_vmi_munmap+0x1f1/0x2b0 [ 28.459346] mmap_region+0x1f9/0x2660 [ 28.459848] do_mmap+0x854/0xf00 [ 28.460295] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.460803] ksys_mmap_pgoff+0x3af/0x500 [ 28.461327] do_syscall_64+0x3f/0x90 [ 28.461836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.462500] [ 28.462730] The buggy address belongs to the object at ffff88800e550e80 [ 28.462730] which belongs to the cache vm_area_struct of size 168 [ 28.464273] The buggy address is located 88 bytes inside of [ 28.464273] freed 168-byte region [ffff88800e550e80, ffff88800e550f28) [ 28.465767] [ 28.465999] The buggy address belongs to the physical page: [ 28.466702] page:0000000030845ef7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe550 [ 28.467841] memcg:ffff888014493701 [ 28.468290] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.468965] page_type: 0xffffffff() [ 28.469448] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 28.470418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014493701 [ 28.471359] page dumped because: kasan: bad access detected [ 28.472043] [ 28.472263] Memory state around the buggy address: [ 28.472848] ffff88800e550d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.473760] ffff88800e550e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.474657] >ffff88800e550e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.475547] ^ [ 28.476299] ffff88800e550f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 28.477184] ffff88800e550f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.478059] ================================================================== [ 28.479102] Disabling lock debugging due to kernel taint [ 30.400606] BUG: Bad rss-counter state mm:00000000f8ad2756 type:MM_FILEPAGES val:33 [ 30.401544] BUG: Bad rss-counter state mm:00000000f8ad2756 type:MM_ANONPAGES val:22 [ 30.867888] BUG: Bad rss-counter state mm:000000001fa53afd type:MM_FILEPAGES val:33 [ 30.868993] BUG: Bad rss-counter state mm:000000001fa53afd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33516' (ECDSA) to the list of known hosts. 2023/06/19 18:11:04 fuzzer started 2023/06/19 18:11:05 dialing manager at localhost:44161 2023/06/19 18:11:05 checking machine... 2023/06/19 18:11:05 checking revisions... [ 31.594632] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:11:05 testing simple program... [ 31.641328] cgroup: Unknown subsys name 'net' [ 31.730783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:11:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f2bba3e1d10 CR3=000000001455c000 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=8cca1241248d11b6d148db42ccb06a19 XMM02=000000000011dcf8d59e07bde36eea69 XMM03=000000000011de20ec2efd57dc4c00df XMM04=31472ffd0f05afd900000000000ae988 XMM05=6e3aa1e0945848f30000000000136470 XMM06=4fda316b135da52b0000000000134ef0 XMM07=fb795ef6d65770560000000000124108 XMM08=2c67c8bc2e329bc3000000000011de20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1353 RSI=ffffffff846000aa RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a70 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888016ed51c0 R15=ffff88806cf09a98 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007ff78fed6900 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=00007ff79048d618 CR3=0000000018154000 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=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