bisecting cause commit starting from a1f92694393a5a607212293cdccececdf6272253 building syzkaller on 0740de696b19a870c7208bd97f3194988281c282 testing commit a1f92694393a5a607212293cdccececdf6272253 with gcc (GCC) 10.2.1 20210217 kernel signature: 218c4c60f15ef7f054f5e8b9ed28ed8286119f6c50dfb5e16a44835f6eaf7bfe run #0: crashed: KASAN: use-after-free Read in ntfs_iget run #1: crashed: KASAN: use-after-free Read in ntfs_iget run #2: crashed: KASAN: use-after-free Read in ntfs_iget run #3: crashed: KASAN: use-after-free Read in ntfs_iget run #4: crashed: KASAN: use-after-free Read in ntfs_iget run #5: crashed: KASAN: use-after-free Read in ntfs_iget run #6: crashed: KASAN: use-after-free Read in ntfs_iget run #7: crashed: KASAN: use-after-free Read in ntfs_iget run #8: crashed: KASAN: use-after-free Read in ntfs_iget run #9: crashed: KASAN: use-after-free Read in ntfs_iget run #10: crashed: KASAN: use-after-free Read in ntfs_iget run #11: crashed: KASAN: out-of-bounds Read in ntfs_iget run #12: crashed: KASAN: use-after-free Read in ntfs_iget run #13: crashed: KASAN: use-after-free Read in ntfs_iget run #14: crashed: KASAN: use-after-free Read in ntfs_iget run #15: crashed: KASAN: use-after-free Read in ntfs_iget run #16: crashed: KASAN: use-after-free Read in ntfs_iget run #17: crashed: KASAN: use-after-free Read in ntfs_iget run #18: crashed: KASAN: use-after-free Read in ntfs_iget run #19: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.12 testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717 with gcc (GCC) 10.2.1 20210217 kernel signature: 20a3195b0c2adea39c30d2e9f830a6fa425a34f031f28cd84a5fc4bf09ce8f4d all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.11 testing commit f40ddce88593482919761f74910f42f4b84c004b with gcc (GCC) 10.2.1 20210217 kernel signature: 22b26ae1e3be417e2ad324e47433a262e845b6471dfc09f4fa2f647b3330df8e all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.10 testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442 with gcc (GCC) 10.2.1 20210217 kernel signature: 8f55ba93fd53951cac9b68b979c728becbef461543abacbe99727324ff41baf6 all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.9 testing commit bbf5c979011a099af5dc76498918ed7df445635b with gcc (GCC) 10.2.1 20210217 kernel signature: f654d07eeb7c456b884d4afbd5bc4d393d1b1677ed42327eee0eaef482a1d4de all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.8 testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.4.1 20210217 kernel signature: 1063ebaf54671db7804acf12269942e9a5933d00bfb78bb5cf898a218f3c1d07 all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.7 testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.4.1 20210217 kernel signature: 3856a09b3d94850025e3ae49dd0f33b972955333e09df445983a6a278d85997d all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.6 testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.4.1 20210217 kernel signature: a3b93acd1315ac27fd28df3f64d6ec371b03ab2c3dca6caf01eeb51039157802 all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.5 testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.4.1 20210217 kernel signature: 56b75590080ebce41771eb20fb3a18a21250479d609f5cd866a9e9cf93705477 run #0: crashed: KASAN: use-after-free Read in ntfs_iget run #1: crashed: KASAN: use-after-free Read in ntfs_iget run #2: crashed: KASAN: out-of-bounds Read in ntfs_iget run #3: crashed: KASAN: use-after-free Read in ntfs_iget run #4: crashed: KASAN: out-of-bounds Read in ntfs_iget run #5: crashed: KASAN: use-after-free Read in ntfs_iget run #6: crashed: KASAN: use-after-free Read in ntfs_iget run #7: crashed: KASAN: use-after-free Read in ntfs_iget run #8: crashed: KASAN: use-after-free Read in ntfs_iget run #9: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.4 testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.4.1 20210217 kernel signature: c6858008ba2dd87e1e0dfa3f7b77c43b09b0dc43a2a0142524db4f19e9503c6e all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.4.1 20210217 kernel signature: aae18b99c108d4b86fb7c39080c3a8373862416e546d19d54d8a47dcb2701455 all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.4.1 20210217 kernel signature: e13f671b39135f0fd02c29412f7240f2d07a062c4a49e605a3f48631956d18cb all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.1 testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.4.1 20210217 kernel signature: 1e42e1e588ea7d5fe6accbe13bfa4221a4f9f3d4fb725780ca1567cc27b907dc all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v5.0 testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.4.1 20210217 kernel signature: 456ab9d42a47fc3d91f08b7c50f5c4ec701f7eb218a74b092e90c30f2478d7da all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.4.1 20210217 kernel signature: f543b467471467cb28b572e97d95e0a2253626904235f6cba502c01f41ee0f3b run #0: crashed: KASAN: use-after-free Read in ntfs_iget run #1: crashed: KASAN: use-after-free Read in ntfs_iget run #2: crashed: KASAN: use-after-free Read in ntfs_iget run #3: crashed: KASAN: out-of-bounds Read in ntfs_iget run #4: crashed: KASAN: use-after-free Read in ntfs_iget run #5: crashed: KASAN: use-after-free Read in ntfs_iget run #6: crashed: KASAN: use-after-free Read in ntfs_iget run #7: crashed: KASAN: use-after-free Read in ntfs_iget run #8: crashed: KASAN: use-after-free Read in ntfs_iget run #9: crashed: KASAN: use-after-free Read in ntfs_iget testing release v4.19 testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.4.1 20210217 kernel signature: 7c52d0b617d619355ea38a3ed4ae87a7c9ff709f87a81ba2b1a7ffd6ff866fe6 all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v4.18 testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.4.1 20210217 kernel signature: cc6e6ed3858e1331d082b868c95fd3a7bd59dda90ee018bf1f3cac79c4f556a6 all runs: crashed: KASAN: use-after-free Read in ntfs_iget testing release v4.17 testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.4.1 20210217 failed to run ["make" "-j" "64" "ARCH=x86_64" "CC=/syzkaller/shared/bisect_bin/gcc-8.1.0/bin/gcc" "bzImage"]: exit status 2 testing release v4.16 testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.4.1 20210217 orc_dump.c:106:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] orc_dump.c:111:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] elf.c:135:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:140:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.15 testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.4.1 20210217 orc_dump.c:106:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] orc_dump.c:111:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] elf.c:135:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:140:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:36:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.14 testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.4.1 20210217 orc_dump.c:105:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] orc_dump.c:110:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:36:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:134:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:139:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.13 testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.4.1 20210217 elf.c:144:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:149:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.12 testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.4.1 20210217 pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:141:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:146:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.11 testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.5.0 elf.c:141:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:146:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.10 testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.9 testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.8 testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.7 testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] elf.c:122:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:127:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.6 testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] revisions tested: 17, total time: 3h1m2.129271458s (build: 2h1m45.5702206s, test: 53m39.640654759s) the crash already happened on the oldest tested release commit msg: Linux 4.18 crash: KASAN: use-after-free Read in ntfs_iget wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 ntfs: (device loop1): load_system_files(): Failed to load $MFTMirr. Mounting read-only. Run ntfsfix and/or chkdsk. wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready ================================================================== BUG: KASAN: use-after-free in ntfs_is_extended_system_file fs/ntfs/inode.c:509 [inline] BUG: KASAN: use-after-free in ntfs_read_locked_inode+0x4586/0x5200 fs/ntfs/inode.c:1042 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready Read of size 8 at addr ffff88008a78ddb8 by task syz-executor.1/9994 CPU: 0 PID: 9994 Comm: syz-executor.1 Not tainted 4.18.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x15a/0x20d lib/dump_stack.c:113 print_address_description.cold.6+0x9/0x244 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report mm/kasan/report.c:412 [inline] kasan_report.cold.7+0x242/0x305 mm/kasan/report.c:396 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/report.c:443 ntfs_is_extended_system_file fs/ntfs/inode.c:509 [inline] ntfs_read_locked_inode+0x4586/0x5200 fs/ntfs/inode.c:1042 ntfs_iget+0xe6/0x120 fs/ntfs/inode.c:190 load_and_init_upcase fs/ntfs/super.c:1669 [inline] load_system_files fs/ntfs/super.c:1824 [inline] ntfs_fill_super+0x1855/0x7910 fs/ntfs/super.c:2908 mount_bdev+0x26f/0x330 fs/super.c:1174 ntfs_mount+0x10/0x20 fs/ntfs/super.c:3065 mount_fs+0x7f/0x2a9 fs/super.c:1277 vfs_kern_mount.part.9+0x58/0x3c0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2542 [inline] do_mount+0x376/0x2710 fs/namespace.c:2872 ksys_mount+0xb1/0xd0 fs/namespace.c:3088 __do_sys_mount fs/namespace.c:3102 [inline] __se_sys_mount fs/namespace.c:3099 [inline] __x64_sys_mount+0xb9/0x150 fs/namespace.c:3099 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x467afa Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff2cec4ffa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ff2cec50000 RBP: 00007ff2cec50040 R08: 00007ff2cec50040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 0000000020000100 R14: 00007ff2cec50000 R15: 0000000020086e00 The buggy address belongs to the page: page:ffffea000229e340 count:0 mapcount:0 mapping:0000000000000000 index:0x1 flags: 0xfff00000000000() raw: 00fff00000000000 ffffea000229e388 ffffea000229e308 0000000000000000 IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not active (free page?) Memory state around the buggy address: ffff88008a78dc80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88008a78dd00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff88008a78dd80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88008a78de00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88008a78de80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== ntfs: (device loop4): is_boot_sector_ntfs(): Invalid end of sector marker. ntfs: (device loop4): map_mft_record_page(): Mft record 0x1 is corrupt. Run chkdsk. wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 ntfs: (device loop4): map_mft_record(): Failed with error code 5. ntfs: (device loop4): ntfs_read_locked_inode(): Failed with error code -5. Marking corrupt inode 0x1 as bad. Run chkdsk. ntfs: (device loop4): load_system_files(): Failed to load $MFTMirr. Mounting read-only. Run ntfsfix and/or chkdsk. ieee80211 phy11: Selected rate control algorithm 'minstrel_ht' wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50