ci starts bisection 2023-07-28 08:18:42.098374396 +0000 UTC m=+66962.151924063 bisecting fixing commit since f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 building syzkaller on 11c89444716852a015f612f3b171a06781707777 ensuring issue is reproducible on original commit f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 testing commit f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 5226a73ad4ee18e0be56234300d0ac04bffba8fd2200d0b4dce1171cb8a233c8 run #0: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir run #10: crashed: KASAN: use-after-free Read in ext4_search_dir run #11: crashed: KASAN: use-after-free Read in ext4_search_dir run #12: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #13: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #14: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #15: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #16: crashed: KASAN: use-after-free Read in ext4_search_dir run #17: crashed: KASAN: use-after-free Read in ext4_search_dir run #18: crashed: KASAN: use-after-free Read in ext4_search_dir run #19: crashed: KASAN: use-after-free Read in ext4_search_dir run #20: crashed: KASAN: use-after-free Read in ext4_search_dir run #21: crashed: KASAN: use-after-free Read in ext4_search_dir run #22: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #23: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #24: crashed: KASAN: use-after-free Read in ext4_search_dir run #25: crashed: KASAN: use-after-free Read in ext4_search_dir run #26: crashed: KASAN: use-after-free Read in ext4_search_dir run #27: crashed: KASAN: use-after-free Read in ext4_search_dir run #28: crashed: KASAN: use-after-free Read in ext4_search_dir run #29: crashed: KASAN: use-after-free Read in ext4_search_dir run #30: crashed: KASAN: use-after-free Read in ext4_search_dir run #31: crashed: KASAN: use-after-free Read in ext4_search_dir run #32: crashed: KASAN: use-after-free Read in ext4_search_dir run #33: crashed: KASAN: use-after-free Read in ext4_search_dir run #34: crashed: KASAN: use-after-free Read in ext4_search_dir run #35: crashed: KASAN: use-after-free Read in ext4_search_dir run #36: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #37: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #38: crashed: KASAN: use-after-free Read in ext4_search_dir run #39: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: slab-out-of-bounds Read in ext4_search_dir, types: [KASAN] check whether we can drop unnecessary instrumentation disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 6fad5dfef1aa5dcd31c068f92be46bbb6d6fbfdfb3d566cb6a3ff347583843f9 run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #7: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir run #10: crashed: KASAN: use-after-free Read in ext4_search_dir run #11: crashed: KASAN: use-after-free Read in ext4_search_dir run #12: crashed: KASAN: use-after-free Read in ext4_search_dir run #13: crashed: KASAN: use-after-free Read in ext4_search_dir run #14: crashed: KASAN: use-after-free Read in ext4_search_dir run #15: crashed: KASAN: use-after-free Read in ext4_search_dir run #16: crashed: KASAN: use-after-free Read in ext4_search_dir run #17: crashed: KASAN: use-after-free Read in ext4_search_dir run #18: crashed: KASAN: use-after-free Read in ext4_search_dir run #19: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the bug reproduces without the instrumentation disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed kconfig minimization: base=3876 full=7603 leaves diff=1999 split chunks (needed=false): <1999> split chunk #0 of len 1999 into 5 parts testing without sub-chunk 1/5 disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 729385960f2e80b1f21ae629669518e850349358920e6cae495a165e5967e456 all runs: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 2/5 disabling configs for [LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN BUG], they are not needed testing commit f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4fe2fa3928d07d25893accb2282c2901ec29244bac41c793330af153240ec6fa run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #7: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir run #10: crashed: KASAN: use-after-free Read in ext4_search_dir run #11: crashed: KASAN: use-after-free Read in ext4_search_dir run #12: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #13: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #14: crashed: KASAN: use-after-free Read in ext4_search_dir run #15: crashed: KASAN: use-after-free Read in ext4_search_dir run #16: crashed: KASAN: use-after-free Read in ext4_search_dir run #17: crashed: KASAN: use-after-free Read in ext4_search_dir run #18: crashed: KASAN: use-after-free Read in ext4_search_dir run #19: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 3/5 disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 48e7c74bbe2c458a4a1b3d50410742572126f971008024b88840d16e9cd3c818 run #0: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #1: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir run #10: crashed: KASAN: use-after-free Read in ext4_search_dir run #11: crashed: KASAN: use-after-free Read in ext4_search_dir run #12: crashed: KASAN: use-after-free Read in ext4_search_dir run #13: crashed: KASAN: use-after-free Read in ext4_search_dir run #14: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #15: crashed: KASAN: out-of-bounds Read in ext4_search_dir run #16: crashed: KASAN: use-after-free Read in ext4_search_dir run #17: crashed: KASAN: use-after-free Read in ext4_search_dir run #18: crashed: KASAN: use-after-free Read in ext4_search_dir run #19: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: slab-out-of-bounds Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 4/5 disabling configs for [BUG LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed testing commit f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 4aa369416d6fce3cc2565f6a7b401b307276ed254ed858789f1e0b0b9f11740a run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: use-after-free Read in ext4_search_dir run #9: crashed: KASAN: use-after-free Read in ext4_search_dir run #10: crashed: KASAN: use-after-free Read in ext4_search_dir run #11: crashed: KASAN: use-after-free Read in ext4_search_dir run #12: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #13: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #14: crashed: KASAN: use-after-free Read in ext4_search_dir run #15: crashed: KASAN: use-after-free Read in ext4_search_dir run #16: crashed: KASAN: use-after-free Read in ext4_search_dir run #17: crashed: KASAN: use-after-free Read in ext4_search_dir run #18: crashed: KASAN: use-after-free Read in ext4_search_dir run #19: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped testing without sub-chunk 5/5 disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing commit f1fcbaa18b28dec10281551dfe6ed3a3ed80e3d6 gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: 16972a68fb82c3da5dc88176d4c5706ad6b5c3ed96a35d69e6e157ae4a8d88ef run #0: crashed: KASAN: use-after-free Read in ext4_search_dir run #1: crashed: KASAN: use-after-free Read in ext4_search_dir run #2: crashed: KASAN: use-after-free Read in ext4_search_dir run #3: crashed: KASAN: use-after-free Read in ext4_search_dir run #4: crashed: KASAN: use-after-free Read in ext4_search_dir run #5: crashed: KASAN: use-after-free Read in ext4_search_dir run #6: crashed: KASAN: use-after-free Read in ext4_search_dir run #7: crashed: KASAN: use-after-free Read in ext4_search_dir run #8: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #9: crashed: KASAN: slab-use-after-free Read in ext4_search_dir run #10: crashed: KASAN: use-after-free Read in ext4_search_dir run #11: crashed: KASAN: use-after-free Read in ext4_search_dir run #12: crashed: KASAN: use-after-free Read in ext4_search_dir run #13: crashed: KASAN: use-after-free Read in ext4_search_dir run #14: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #15: crashed: KASAN: slab-out-of-bounds Read in ext4_search_dir run #16: crashed: KASAN: use-after-free Read in ext4_search_dir run #17: crashed: KASAN: use-after-free Read in ext4_search_dir run #18: crashed: KASAN: use-after-free Read in ext4_search_dir run #19: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] the chunk can be dropped disabling configs for [HANG LEAK UBSAN BUG LOCKDEP ATOMIC_SLEEP], they are not needed testing current HEAD 57012c57536f8814dec92e74197ee96c3498d24e testing commit 57012c57536f8814dec92e74197ee96c3498d24e gcc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 kernel signature: b2471410c01157d6426d383d4d72c6d2503a2556b2bf2a6ea6f349ee6aaf68f1 all runs: crashed: KASAN: use-after-free Read in ext4_search_dir representative crash: KASAN: use-after-free Read in ext4_search_dir, types: [KASAN] crash still not fixed/happens on the oldest tested release revisions tested: 8, total time: 1h22m44.326265708s (build: 53m58.861594414s, test: 24m21.725019254s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Merge tag 'net-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net crash: KASAN: use-after-free Read in ext4_search_dir EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. ================================================================== BUG: KASAN: use-after-free in ext4_search_dir+0x14c/0x260 fs/ext4/namei.c:1539 Read of size 1 at addr ffff888125dd13ed by task syz-executor.0/1840 CPU: 0 PID: 1840 Comm: syz-executor.0 Not tainted 6.5.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xf8/0x260 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 ext4_search_dir+0x14c/0x260 fs/ext4/namei.c:1539 ext4_find_inline_entry+0x36b/0x540 fs/ext4/inline.c:1694 __ext4_find_entry+0x2e0/0x1a10 fs/ext4/namei.c:1612 ext4_lookup_entry fs/ext4/namei.c:1767 [inline] ext4_lookup+0x1af/0x600 fs/ext4/namei.c:1835 lookup_open fs/namei.c:3470 [inline] open_last_lookups fs/namei.c:3560 [inline] path_openat+0xd69/0x2820 fs/namei.c:3790 do_filp_open+0x22a/0x440 fs/namei.c:3820 do_sys_openat2+0xf6/0x170 fs/open.c:1407 do_sys_open fs/open.c:1422 [inline] __do_sys_open fs/open.c:1430 [inline] __se_sys_open fs/open.c:1426 [inline] __x64_sys_open+0x1ef/0x240 fs/open.c:1426 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f9567667959 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f95671ea0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f9567786f80 RCX: 00007f9567667959 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000100 RBP: 00007f95676c3c88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f9567786f80 R15: 00007ffe2722dba8 The buggy address belongs to the physical page: page:ffffea0004977440 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x125dd1 flags: 0x200000000000000(node=0|zone=2) page_type: 0xffffffff() raw: 0200000000000000 ffffea0004971cc8 ffffea000496fc88 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 1814, tgid 1814 (modprobe), ts 53630284498, free_ts 53631534879 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x26e/0x290 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x332d/0x3590 mm/page_alloc.c:3221 __alloc_pages+0x255/0x650 mm/page_alloc.c:4477 vma_alloc_folio+0x693/0x870 mm/mempolicy.c:2240 do_anonymous_page mm/memory.c:4104 [inline] do_pte_missing mm/memory.c:3662 [inline] handle_pte_fault mm/memory.c:4939 [inline] __handle_mm_fault mm/memory.c:5079 [inline] handle_mm_fault+0x1734/0x30e0 mm/memory.c:5233 do_user_addr_fault arch/x86/mm/fault.c:1343 [inline] handle_page_fault arch/x86/mm/fault.c:1486 [inline] exc_page_fault+0x3cf/0x750 arch/x86/mm/fault.c:1542 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x800/0x920 mm/page_alloc.c:2348 free_unref_page_list+0xb3/0x630 mm/page_alloc.c:2489 release_pages+0x16af/0x1850 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline] tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu+0x273/0x3d0 mm/mmu_gather.c:299 tlb_finish_mmu+0xb6/0x1c0 mm/mmu_gather.c:391 exit_mmap+0x345/0x830 mm/mmap.c:3214 __mmput+0x61/0x290 kernel/fork.c:1348 exit_mm+0x113/0x1b0 kernel/exit.c:567 do_exit+0x7cf/0x2350 kernel/exit.c:861 do_group_exit+0x1b9/0x280 kernel/exit.c:1024 __do_sys_exit_group kernel/exit.c:1035 [inline] __se_sys_exit_group kernel/exit.c:1033 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1033 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffff888125dd1280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888125dd1300: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888125dd1380: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888125dd1400: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888125dd1480: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================