syzkaller login: [ 58.631304] BUG: Bad rss-counter state mm:0000000028b7e4c4 type:MM_FILEPAGES val:33 [ 58.632164] BUG: Bad rss-counter state mm:0000000028b7e4c4 type:MM_ANONPAGES val:22 [ 58.749742] ================================================================== [ 58.750442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.751081] Read of size 8 at addr ffff888019f5ea50 by task sshd/220 [ 58.751582] [ 58.751726] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 58.752330] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.753069] Call Trace: [ 58.753303] [ 58.753511] dump_stack_lvl+0x91/0xf0 [ 58.753865] print_report+0xcc/0x620 [ 58.754231] ? __virt_addr_valid+0x102/0x340 [ 58.754792] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.755271] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.755701] kasan_report+0xbe/0xf0 [ 58.756034] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.756460] vma_interval_tree_remove+0xc75/0xec0 [ 58.756930] vma_prepare+0xc54/0x11a0 [ 58.757273] __split_vma+0x5af/0x950 [ 58.757604] ? __pfx___split_vma+0x10/0x10 [ 58.757978] ? find_held_lock+0x2c/0x110 [ 58.758368] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.758765] ? lock_is_held_type+0x9f/0x120 [ 58.759117] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.759520] ? mtree_range_walk+0x632/0x900 [ 58.759902] ? mas_walk+0x5c7/0x7c0 [ 58.760239] do_vmi_munmap+0x1f1/0x2b0 [ 58.760575] mmap_region+0x1f9/0x2660 [ 58.760899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.761248] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.761737] ? __pfx_lock_acquire+0x10/0x10 [ 58.762154] ? __pfx_mmap_region+0x10/0x10 [ 58.762520] ? security_mmap_addr+0x7d/0xa0 [ 58.762897] ? get_unmapped_area+0x1f5/0x3f0 [ 58.763277] do_mmap+0x854/0xf00 [ 58.763583] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.763929] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.764332] ksys_mmap_pgoff+0x3af/0x500 [ 58.764656] do_syscall_64+0x3f/0x90 [ 58.764976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.765441] RIP: 0033:0x7f053dfd7d82 [ 58.765747] 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 [ 58.767209] RSP: 002b:00007ffdd8561848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.767811] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f053dfd7d82 [ 58.768384] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f053d411000 [ 58.768945] RBP: 00007f053d411000 R08: 0000000000000009 R09: 0000000000001000 [ 58.769507] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a05eac6ec0 [ 58.774193] R13: 00007ffdd8561860 R14: 00007ffdd8561890 R15: 00007ffdd8561bf0 [ 58.774690] [ 58.774853] [ 58.774973] Allocated by task 213: [ 58.775210] kasan_save_stack+0x22/0x50 [ 58.775494] kasan_set_track+0x25/0x30 [ 58.775763] __kasan_slab_alloc+0x59/0x70 [ 58.776048] kmem_cache_alloc+0x16b/0x370 [ 58.776357] vm_area_dup+0x20/0x160 [ 58.776617] __split_vma+0x170/0x950 [ 58.776878] split_vma+0xc6/0x110 [ 58.777120] mprotect_fixup+0x8d2/0xb30 [ 58.777397] do_mprotect_pkey+0x87e/0xd40 [ 58.777682] __x64_sys_mprotect+0x78/0xc0 [ 58.777966] do_syscall_64+0x3f/0x90 [ 58.778270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.778621] [ 58.778740] Freed by task 213: [ 58.778959] kasan_save_stack+0x22/0x50 [ 58.779231] kasan_set_track+0x25/0x30 [ 58.779498] kasan_save_free_info+0x2b/0x50 [ 58.779784] __kasan_slab_free+0x10a/0x190 [ 58.780052] kmem_cache_free+0x10d/0x4d0 [ 58.780339] rcu_core+0x8c8/0x2860 [ 58.780580] __do_softirq+0x1b7/0x7d4 [ 58.780840] [ 58.780956] Last potentially related work creation: [ 58.781276] kasan_save_stack+0x22/0x50 [ 58.781550] __kasan_record_aux_stack+0x8e/0xa0 [ 58.781860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.782312] remove_vma+0x139/0x170 [ 58.782624] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.782999] do_vmi_munmap+0x1f1/0x2b0 [ 58.783305] __vm_munmap+0x138/0x3a0 [ 58.783611] __x64_sys_munmap+0x59/0x80 [ 58.783949] do_syscall_64+0x3f/0x90 [ 58.784289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.784724] [ 58.784871] The buggy address belongs to the object at ffff888019f5e9f8 [ 58.784871] which belongs to the cache vm_area_struct of size 168 [ 58.785863] The buggy address is located 88 bytes inside of [ 58.785863] freed 168-byte region [ffff888019f5e9f8, ffff888019f5eaa0) [ 58.786853] [ 58.787001] The buggy address belongs to the physical page: [ 58.787443] page:000000007f8afd77 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f5e [ 58.788209] memcg:ffff88800dc39a01 [ 58.788529] flags: 0x100000000000200(slab|node=0|zone=1) [ 58.788978] page_type: 0xffffffff() [ 58.789291] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 58.789911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc39a01 [ 58.790601] page dumped because: kasan: bad access detected [ 58.791076] [ 58.791228] Memory state around the buggy address: [ 58.791646] ffff888019f5e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.792254] ffff888019f5e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 58.792850] >ffff888019f5ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.793490] ^ [ 58.793976] ffff888019f5ea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 58.794588] ffff888019f5eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.795178] ================================================================== [ 58.795919] Disabling lock debugging due to kernel taint [ 60.764636] BUG: Bad rss-counter state mm:00000000809800be type:MM_FILEPAGES val:33 [ 60.765709] BUG: Bad rss-counter state mm:00000000809800be type:MM_ANONPAGES val:22 [ 61.213458] BUG: Bad rss-counter state mm:000000000aeead83 type:MM_FILEPAGES val:33 [ 61.214191] BUG: Bad rss-counter state mm:000000000aeead83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26353' (ECDSA) to the list of known hosts. 2023/06/20 09:00:28 fuzzer started 2023/06/20 09:00:29 dialing manager at localhost:44161 2023/06/20 09:00:29 checking machine... 2023/06/20 09:00:29 checking revisions... [ 61.794728] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:00:29 testing simple program... [ 61.831951] cgroup: Unknown subsys name 'net' [ 61.865580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:00:01 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=0000000000000001 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=00007ffeb3dd8c68 CR3=0000000005482000 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=00007fb3102d2510000055cdf2fd1790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b9d57 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff864b9d56 RBP=ffff8880164af920 RSP=ffff8880164af858 R8 =ffffffff864b9d5a R9 =ffff8880164af908 R10=0000000000038001 R11=00000000000b6996 R12=ffff8880164af928 R13=ffff8880164af910 R14=ffff8880164aff58 R15=ffff8880164af8c8 RIP=ffffffff81130b85 RFL=00000217 [----APC] 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 00007f7313db5900 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=00007f731436c618 CR3=000000000e6f8000 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=563412feff00545000000000000080fe 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