syzkaller login: [ 38.654616] BUG: Bad rss-counter state mm:0000000055adadde type:MM_FILEPAGES val:33 [ 38.655835] BUG: Bad rss-counter state mm:0000000055adadde type:MM_ANONPAGES val:22 [ 38.841393] ================================================================== [ 38.842489] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.843744] Read of size 8 at addr ffff88800dcfb228 by task sshd/218 [ 38.844667] [ 38.844926] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.845981] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.847160] Call Trace: [ 38.847576] [ 38.847918] dump_stack_lvl+0x91/0xf0 [ 38.848456] print_report+0xcc/0x620 [ 38.848932] ? __virt_addr_valid+0x102/0x340 [ 38.849469] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.850092] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.850701] kasan_report+0xbe/0xf0 [ 38.851165] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.851793] vma_interval_tree_remove+0xc75/0xec0 [ 38.852398] vma_prepare+0xc54/0x11a0 [ 38.852869] __split_vma+0x5af/0x950 [ 38.853337] ? __pfx___split_vma+0x10/0x10 [ 38.853862] ? find_held_lock+0x2c/0x110 [ 38.854381] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.854934] ? lock_is_held_type+0x9f/0x120 [ 38.855469] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.856091] ? mtree_range_walk+0x632/0x900 [ 38.856634] ? mas_walk+0x5c7/0x7c0 [ 38.857109] do_vmi_munmap+0x1f1/0x2b0 [ 38.857591] mmap_region+0x1f9/0x2660 [ 38.858075] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.858577] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.859274] ? __pfx_lock_acquire+0x10/0x10 [ 38.859799] ? __pfx_mmap_region+0x10/0x10 [ 38.860323] ? security_mmap_addr+0x7d/0xa0 [ 38.860846] ? get_unmapped_area+0x1f5/0x3f0 [ 38.861387] do_mmap+0x854/0xf00 [ 38.861820] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.862309] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.862875] ksys_mmap_pgoff+0x3af/0x500 [ 38.863383] do_syscall_64+0x3f/0x90 [ 38.863867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.864506] RIP: 0033:0x7fd96efabd82 [ 38.864955] 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 [ 38.867044] RSP: 002b:00007fff8772b4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.867944] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd96efabd82 [ 38.868777] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd96e3e5000 [ 38.869611] RBP: 00007fd96e3e5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.870440] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559095488980 [ 38.871290] R13: 00007fff8772b4f0 R14: 00007fff8772b520 R15: 00007fff8772b880 [ 38.872189] [ 38.872487] [ 38.872705] Allocated by task 211: [ 38.873143] kasan_save_stack+0x22/0x50 [ 38.873654] kasan_set_track+0x25/0x30 [ 38.874163] __kasan_slab_alloc+0x59/0x70 [ 38.874702] kmem_cache_alloc+0x16b/0x370 [ 38.875234] vm_area_dup+0x20/0x160 [ 38.875710] __split_vma+0x170/0x950 [ 38.876186] split_vma+0xc6/0x110 [ 38.876634] mprotect_fixup+0x8d2/0xb30 [ 38.877148] do_mprotect_pkey+0x87e/0xd40 [ 38.877696] __x64_sys_mprotect+0x78/0xc0 [ 38.878235] do_syscall_64+0x3f/0x90 [ 38.878715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.879363] [ 38.879601] Freed by task 211: [ 38.879999] kasan_save_stack+0x22/0x50 [ 38.880510] kasan_set_track+0x25/0x30 [ 38.881018] kasan_save_free_info+0x2b/0x50 [ 38.881557] __kasan_slab_free+0x10a/0x190 [ 38.882108] kmem_cache_free+0x10d/0x4d0 [ 38.882625] rcu_core+0x8c8/0x2860 [ 38.883083] __do_softirq+0x1b7/0x7d4 [ 38.883594] [ 38.883819] Last potentially related work creation: [ 38.884414] kasan_save_stack+0x22/0x50 [ 38.884924] __kasan_record_aux_stack+0x8e/0xa0 [ 38.885508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.886165] remove_vma+0x139/0x170 [ 38.886628] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.887199] do_vmi_munmap+0x1f1/0x2b0 [ 38.887719] __vm_munmap+0x138/0x3a0 [ 38.888199] __x64_sys_munmap+0x59/0x80 [ 38.888703] do_syscall_64+0x3f/0x90 [ 38.889189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889848] [ 38.890068] Second to last potentially related work creation: [ 38.890765] kasan_save_stack+0x22/0x50 [ 38.891279] __kasan_record_aux_stack+0x8e/0xa0 [ 38.891877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.892526] remove_vma+0x139/0x170 [ 38.892985] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.893559] do_vmi_munmap+0x1f1/0x2b0 [ 38.894065] mmap_region+0x1f9/0x2660 [ 38.894554] do_mmap+0x854/0xf00 [ 38.894993] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.895500] ksys_mmap_pgoff+0x3af/0x500 [ 38.896014] do_syscall_64+0x3f/0x90 [ 38.896502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897162] [ 38.897381] The buggy address belongs to the object at ffff88800dcfb1d0 [ 38.897381] which belongs to the cache vm_area_struct of size 168 [ 38.898879] The buggy address is located 88 bytes inside of [ 38.898879] freed 168-byte region [ffff88800dcfb1d0, ffff88800dcfb278) [ 38.900342] [ 38.900557] The buggy address belongs to the physical page: [ 38.901229] page:000000007dc9d0e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcfb [ 38.902330] memcg:ffff88800ec89301 [ 38.902766] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.903426] page_type: 0xffffffff() [ 38.903895] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.904845] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec89301 [ 38.905780] page dumped because: kasan: bad access detected [ 38.906431] [ 38.906648] Memory state around the buggy address: [ 38.907232] ffff88800dcfb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.908100] ffff88800dcfb180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.908947] >ffff88800dcfb200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.909794] ^ [ 38.910342] ffff88800dcfb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.911186] ffff88800dcfb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.912038] ================================================================== [ 38.913124] Disabling lock debugging due to kernel taint [ 40.950429] BUG: Bad rss-counter state mm:00000000338ea2f1 type:MM_FILEPAGES val:33 [ 40.951412] BUG: Bad rss-counter state mm:00000000338ea2f1 type:MM_ANONPAGES val:22 [ 41.369047] BUG: Bad rss-counter state mm:00000000f22f0d67 type:MM_FILEPAGES val:33 [ 41.370705] BUG: Bad rss-counter state mm:00000000f22f0d67 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31242' (ECDSA) to the list of known hosts. 2023/06/20 23:47:22 fuzzer started 2023/06/20 23:47:22 dialing manager at localhost:36067 2023/06/20 23:47:23 checking machine... 2023/06/20 23:47:23 checking revisions... [ 42.156943] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:47:23 testing simple program... [ 42.214812] cgroup: Unknown subsys name 'net' [ 42.257842] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:47:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9c135e RDX=dffffc0000000000 RSI=ffffffff813782f8 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130706 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 00007f77fd679900 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=00007f77fdc30618 CR3=000000000ecc0000 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=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 info registers vcpu 1 RAX=000000008533f015 RBX=00000000180eeed4 RCX=ffff88801681f16c RDX=0000000000000014 RSI=000000000000000d RDI=000000001cef153b RBP=ffff8880084c6140 RSP=ffff88801681f098 R8 =000000003140fec2 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000002800 R14=ffff88801681f100 R15=0000000000000014 RIP=ffffffff82270461 RFL=00000202 [-------] 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 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=000055b15b390650 CR3=000000000d52e000 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=2032323a37343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a37343a3332203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000